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IBMBIO/BDOSLDR.A86

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+;    File              : $BDOSLDR.A86$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+
+	include i:reqhdr.equ
+	include i:driver.equ
+	include	config.equ
+
+;	MISC constants
+CR		equ	0dh			;the usual
+LF		equ	0ah
+
+
+DATTS		equ	byte ptr 11
+ DA_VOLUME	equ	08h
+ DA_DIR		equ	10h
+DBLOCK1		equ	word ptr 26
+
+
+eject
+CGROUP		group	INITCODE, INITDATA
+
+INITCODE	cseg	'INITCODE'
+
+eject
+if DOS5
+VER_MUSTBE	equ	1072h
+else
+VER_MUSTBE	equ	1071h
+endif
+
+	Public	dos_version_check
+
+	Public	read_dos		; read BDOS from disk
+
+;--------
+read_dos:	; read in the BDOS
+;--------
+	call	login_drive		; build BPB for the boot drive
+	mov	si,offset dos_name	; get name of file to open
+	call	open_file		; open the BDOS file
+	call	read_file		; read in the system file
+	ret
+
+login_drive:
+;-----------
+	les	di,boot_device		; get device driver address
+	mov	dl,boot_drv		; get the boot drive sub unit
+	mov	ax,es
+	or	ax,di			; make sure boot device is initialised
+	 jnz	login_drive10
+	jmp	dev_fail
+login_drive10:
+	mov	ax,es:6[di]		; get strategy offset
+	mov	strat_off,ax
+	mov	strat_seg,es		; get strategy segment
+	mov	ax,es:8[di]		; get interrupt offset
+	mov	intrpt_off,ax
+	mov	intrpt_seg,es		; get interrupt segment
+
+	mov	bx,offset req_hdr
+	mov	ds:RH_UNIT,dl		; save logical unit to use
+	mov	ds:RH_CMD,CMD_BUILD_BPB
+	call	device_request		; tell it to build a BPB
+	 jc	dev_fail		; return if can't determine BPB
+	push	ds ! push si
+	push	ds ! pop es
+	mov	di,offset local_bpb	; ES:DI -> local BPB copy
+	mov	cx,BPB_LENGTH
+	lds	si,ds:RH2_BPB		; copy BPB to local memory
+	rep	movsb
+	pop	si ! pop ds
+
+;	Now we have to figure out whether the media uses 12 or 16 bit FATs.
+;	To that end, we need to compute the # of clusters on the drive:
+
+	mov	fat16,0			; assume 12 bit FAT
+
+	mov	al,BT_nfats		; compute FAT size
+	mov	ah,0			; AX = # of FAT copies (usually 2)
+	mul	BT_fat_size		; AX/DX = size of FAT in sectors
+
+	add	ax,BT_reserved_sectors	; add in bootstrap sectors
+	adc	dx,0
+	mov	cx,ax			; CX/BP = sector address of root dir
+	mov	bp,dx
+
+	mov	ax,32			; compute root directory size
+	mul	BT_dirsize		; AX/DX = bytes in directory
+	mov	bx,BT_bytes_per_sector
+	dec	bx			; BX = sector size - 1 for rounding
+	add	ax,bx			; round up to next sector size
+	adc	dx,0
+	inc	bx			; BX = sector size in bytes
+	div	bx			; AX = # of root directory sectors
+	add	cx,ax			; CX/BP = sectors before data area
+	adc	bp,0
+
+	mov	ax,BT_total_sectors	; AX/DX = total disk size in sectors
+	sub	dx,dx
+	test	ax,ax			; is it actually larger than 65535?
+	 jnz	dev_small		; no, AX/DX is correct
+	mov	ax,BT_total_long	; else get real size from extension
+	mov	dx,BT_total_long+2
+dev_small:				; AX/DX = disk size in sectors
+	sub	ax,cx			; AX/DX = data sectors
+	sbb	dx,bp
+					; now convert this to clusters
+	mov	bl,BT_sctr_per_cluster
+	mov	bh,0			; BX = sectors per clusters
+	div	bx			; AX = # of data clusters
+	inc	ax
+	inc	ax			; cluster 0,1 are reserved
+	cmp	ax,0FF6h		; is this too large for 12 bits?
+	 jbe	dev_12bit		; skip if 12 bits will do
+	mov	fat16,-1		; else we use 16 bits
+dev_12bit:
+	ret
+
+
+dos_version_check:
+;-----------------
+	mov	ax,4452h
+	int	21h			; try and get DRDOS version number
+	 jc	dev_fail		;  it's not DRDOS !
+	cmp	ax,VER_MUSTBE		; version check the DRDOS BDOS
+	 jne	dev_fail		;  reject all but the one we want
+	ret				; return now I'm happy
+
+dev_fail:	; any error has occurred loading the BDOS
+;--------
+; Print '$' terminated message at offset DX to console without using the BDOS
+;
+	mov	dx,offset dos_msg
+	les	di,resdev_chain		; get first device driver address
+fail_scan:
+	test	es:DH_ATTRIB[di],DA_CHARDEV
+	 jz	fail_next		; skip if not a character device
+	test	es:DH_ATTRIB[di],DA_ISCOT
+	 jnz	fail_found		; skip if console device found
+fail_next:
+	les	di,es:[di]		; get next device
+	jmps	fail_scan
+fail_found:
+	mov	ax,es:6[di]		; get strategy offset
+	mov	strat_off,ax
+	mov	strat_seg,es		; get strategy segment
+	mov	ax,es:8[di]		; get interrupt offset
+	mov	intrpt_off,ax
+	mov	intrpt_seg,es		; get interrupt segment
+
+	mov	bx,offset req_hdr
+	mov	ds:RH_CMD,CMD_OUTPUT	; write to console
+	mov	ds:RH_LEN,RH4_LEN	; set request header length
+	mov	ds:RH4_BUFOFF,dx	; set address of string
+	mov	ds:RH4_BUFSEG,ds
+	mov	ds:RH4_COUNT,-1
+	mov	si,dx			; now find the end of the string
+fail_count_chars:
+	inc	ds:RH4_COUNT		; print another char
+	lodsb				; examine the next one
+	cmp	al,'$'			; terminating char ?
+	 jnz	fail_count_chars
+	call	device_request		; call the console driver
+
+	sti
+	jmps	$			; wait for reboot
+
+
+device_request:		; general device driver interface
+;--------------
+;	entry:	BX -> request header
+;	exit:	CY = 1 if error
+
+	push	ds ! push es
+	push	ds ! pop es
+	mov	ds,strat_seg
+	callf	cs:strat_ptr
+	callf	cs:intrpt_ptr
+	pop	es ! pop ds
+	test	ds:RH_STATUS,RHS_ERROR
+	 jnz	devreq_err
+	clc
+	ret
+devreq_err:
+	jmp	dev_fail		; print error message
+
+
+	ret
+	
+open_file:	; open BDOS system file
+;---------
+;	entry:	SI -> 11 byte file name
+
+	mov	al,BT_nfats
+	cbw
+	mul	BT_fat_size		; DX:AX = # FAT sectors
+
+	mov	cx,ax			; CX = rel_sctr dir start
+	mov	dx,BT_dirsize		; dx = # entries to scan
+
+open_f1: 				; CX = current dir sector
+					; DX = current dir count
+					; SI -> file name
+	push	cx ! push dx ! push si
+	push	ds ! pop es		; ES:BX -> sector buffer
+	mov	bx,offset sector_buffer
+	mov	dx,1			; read one directory sector
+	call	rd_sector_rel		;     via disk driver
+	pop	si ! pop dx ! pop cx
+	inc	cx			; increment sector for next time
+
+	sub	bx,bx			; start at beginning of sector
+open_f2:
+	lea	di,sector_buffer[bx]	; ES:DI -> directory entry
+	push	si ! push di ! push cx	; save name ptr and count
+	push	ds ! pop es
+	mov	cx,11
+	repe	cmpsb			; check if name matches
+	pop	cx ! pop di ! pop si
+	 jne	open_f3			; skip if name doesn't match
+	test	DATTS[di],DA_DIR+DA_VOLUME
+	 jz	open_foundit		; skip if matches
+open_f3:
+	dec	dx			; count down root directory entries
+	 jz	open_fail		; skip if root directory done
+	add	bx,32			; next entry in directory sector
+	cmp	bx,BT_bytes_per_sector	; sector complete?
+	 jb	open_f2			; loop back while more
+	jmps	open_f1			; read next directory sector
+
+open_fail:				; file not found
+	jmp	dev_fail
+
+open_foundit:				; found the open file handle
+	mov	ax,DBLOCK1[di]		; get first disk block
+	mov	start_cluster,ax	; save starting cluster
+	xor	ax,ax
+	ret				; return success
+
+
+read_file:	; read BDOS files into memory at MEM_CURRENT:0000
+;---------
+	mov	ax,current_dos		; Get the Segment address to
+	mov	dta_seg,ax		; load the BDOS at
+	sub	ax,ax
+	mov	dta_off,ax
+rd_file1:
+	mov	cluster_count,1		; we can read at least one cluster
+	mov	cx,start_cluster
+rd_file2:				; check if next cluster contiguous
+	push	cx			; save current cluster number
+	call	next_cluster		; get link to next cluster
+	pop	dx			; get previous cluster #
+	inc	dx			; is current cluster contiguous?
+	cmp	cx,dx			; contiguos if CX == DX
+	 jne	rd_file3		; no, need a separate read
+	inc	cluster_count		; else read one more cluster
+	jmps	rd_file2		; try again with next cluster
+rd_file3:				; CX = next chain, multi cluster read
+	push	cx			; save start of next chain
+	les	bx,dta_ptr		; ES:BX -> transfer address
+	mov	cx,start_cluster	; previous contiguous chain starts here
+	mov	dx,cluster_count	; length of chain in clusters
+	call	rd_cluster		; read DX clusters
+	mov	al,BT_sctr_per_cluster
+	mov	ah,0			; AX = sectors per cluster
+	mul	cluster_count		; AX = sectors in chain to read
+	mul	BT_bytes_per_sector	; AX = bytes in chain to read
+	add	dta_off,ax
+	pop	cx			; CX = next (noncontiguous) cluster
+	mov	start_cluster,cx	; start of new chain
+	inc	cx			; was it end of file cluster number?
+	 jnz	rd_file1		; go back for more if not
+					; else all clusters done
+	ret
+
+
+get_FAT_byte:
+;------------
+;	entry:	BX = offset into FAT
+
+	mov	ax,bx			; BX = offset into FAT
+	sub	dx,dx			; AX/DX = 32 bit offset
+	div	BT_bytes_per_sector	; AX = sector, DX = offset in sector
+	push	dx			; save offset in sector
+	call	locate_FAT		; read FAT sector AX
+	pop	bx			; BX = offset in FAT sector
+	mov	al,sector_buffer[bx]	; get byte from FAT buffer
+	ret
+
+
+locate_FAT:
+;----------
+;	entry:	AX = FAT sector to locate
+
+	cmp	ax,current_fatsec	; AX = sector offset into FAT
+	 je	locate_FAT_match	; O.K. if same as last time
+
+	mov	current_fatsec,ax	; set new sector for next time
+	push	cx ! push si		; preserve FAT index
+	mov	cx,ax			; CX = sector number
+	mov	bx,offset sector_buffer
+	push	ds ! pop es		; ES:BX -> sector buffer
+	mov	dx,1			; DX = single sector
+	call	rd_sector_rel		; read FAT sector
+	pop	si ! pop cx		; restore FAT index
+
+locate_FAT_match:			; return with right sector in buffer
+	ret
+
+
+eject
+;	reads sectors relative to start of DOS area on disk (start=0)
+;	same parameters as rd_sector
+rd_sector_rel:
+;-------------
+;	entry:	CX = sector address relative to first FAT sector
+;		DX = sector count
+
+	sub	bp,bp				;overflow word = 0
+	add	cx,BT_reserved_sectors
+	adc	bp,0
+;	jmps	rd_sector
+	
+
+;	reads absolute sectors from hard disk using rom bios
+rd_sector:
+;---------
+;	entry:	DX = number of sectors
+;		ES:BX -> data transfer buffer
+;		DS -> program global data segment
+;		CX/BP = absolute sector # (32 bit) (low/high)
+
+	push	cx ! push dx		; save parameters
+	mov	req3_bufoff,bx		; save transfer offset
+	mov	req3_bufseg,es		; save transfer segment
+	mov	req3_count,dx		; set sector count
+	mov	bx,offset req_hdr	; BX -> request header
+	mov	ds:RH_CMD,CMD_INPUT	; read from disk device
+	mov	req3_sector,cx		; set requested sector address
+if DOS5
+	mov	req_hdr,RH4_LEN
+	mov	req3_sector32,cx	;  with 32 sector number
+	mov	req3_sector32+2,bp
+	test	bp,bp			; large sector number?
+	 jz	rd_sec1			; no, normal request header
+	mov	req3_sector,0FFFFh	; mark as a large request
+rd_sec1:
+else
+	mov	req3_sector+2,bp	; (support large DOS drives)
+	mov	req_hdr,24		; indicate large request
+endif
+	call	device_request		; tell it to read sectors
+	pop	cx ! pop dx
+	ret				; if CY, AH=error code
+
+
+rd_cluster:
+;----------
+;	entry:	CX = DOS cluster number.
+;		DX = cluster count
+;		ES:BX -> transfer buffer
+
+	push	bx ! push es
+
+	mov	al,BT_sctr_per_cluster
+	mov	ah,0			; AX = sectors per cluster
+	mul	dx			; AX = sectors in all clusters
+	push	ax			; save the sector count
+
+	sub	cx,2			; cluster 2 is data area start
+	mov	al,BT_sctr_per_cluster
+	cbw
+	mul	cx			; AX,DX = relative sector #
+	mov	cx,ax
+	mov	bp,dx			; CX,BP = data area sector #
+
+	mov	al,BT_nfats		; compute FAT size
+	mov	ah,0			; AX = # of FAT copies (usually 2)
+	mul	BT_fat_size		; AX/DX = size of FAT in sectors
+	add	cx,ax
+	adc	bp,dx			; CX,BP = end of FAT sectors
+
+	mov	ax,32
+	mul	BT_dirsize		; AX,DX = bytes in root directory
+	mov	bx,BT_bytes_per_sector
+	dec	bx
+	add	ax,bx			; round up directory size
+	adc	dx,0
+	inc	bx
+	div	bx			; AX = root directory sectors
+	add	cx,ax
+	adc	bp,0			; add root directory size
+
+	add	cx,BT_reserved_sectors	; add in boot sector(s)
+	adc	bp,0
+
+	pop	dx ! pop es ! pop bx	; sector count, disk address
+
+	jmp	rd_sector		; DX secs from CX/BP to ES:BX
+
+
+;	Finds the NEXT cluster after the one passed in CX in an allocation
+;	chain by using the FAT.  Returns the carry set if the end of chain
+;	mark is found, otherwise returns the NEW cluster # in CX.
+next_cluster:
+;------------
+	push	dx ! push bx		; save some registers
+	cmp	fat16,0			; check if this is 12 bit media
+	 je	next_cluster12		; skip if old fashioned 12 bit
+	mov	ax,2
+	mul	cx			; AX/DX = byte offset in FAT (max. 128K)
+	div	BT_bytes_per_sector	; AX = FAT sector #, DX = byte offset
+	push	dx			; save byte offset within sector
+	call	locate_FAT		; get FAT sector AX
+	pop	bx			; BX = offset within sector
+	mov	cx,word ptr sector_buffer[bx]
+					; get 16 bit from FAT
+
+	cmp	cx,0FFF7h		; check if too large for #
+	 jae	next_cluster_eof	; set carry, EOF
+	clc
+	jmps	next_cluster_ret	; good link
+
+next_cluster12:				; DOS 2.x disk
+	push	cx			; save cluster number
+	mov	bx,cx
+	add	bx,bx			; BX = cluster# * 2
+	add	bx,cx			; BX = cluster# * 3
+	shr	bx,1			; BX = cluster# * 1.5
+	push	bx			; save offset in the FAT
+	inc	bx			; BX = offset of high byte
+	call	get_FAT_byte		; get the high byte in AL
+	pop	bx			; BX = offset of low byte
+	push	ax			; save high byte on stack
+	call	get_FAT_byte		; get the low byte in AL
+	pop	bx			; pop off high byte into BL
+	mov	ah,bl			; set high byte, AX = word
+	pop	cx			; restore cluster number
+	shr	cx,1			; test if even or odd
+	 jnc	even_fat		; if even entry, done
+	mov	cl,4			; odd entry, shift down one nibble
+	shr	ax,cl			; else need to justify
+even_fat:				; even entry, strip off top bits
+	and	ax,0fffh		; bx[0..11] are cluster
+	mov	cx,ax			; CX = cluster number
+	cmp	cx,0ff7h		; compare with largest legal 12 bit #
+	 jae	next_cluster_eof	; check for end mark
+	clc
+	jmps	next_cluster_ret	; return value in CX, CY = 0
+next_cluster_eof:
+	mov	cx,-1			; indicate end of chain
+	stc				; end of chain
+next_cluster_ret:
+	pop	bx ! pop dx
+	ret
+
+
+eject
+;
+;	INITIALIZED DATA SEGMENT
+;	========================
+INITDATA	dseg	'INITDATA'
+
+		extrn	resdev_chain:dword	; resident device driver root
+		extrn	current_dos:word	; current BDOS segment
+		extrn	boot_device:dword	; device driver we boot from
+		extrn	boot_drv:byte		; boot drive
+		extrn	dos_name:byte		; name of BDOS file
+
+strat_ptr	rd	0
+strat_off	rw	1
+strat_seg	rw	1
+
+intrpt_ptr	rd	0
+intrpt_off	rw	1
+intrpt_seg	rw	1
+
+dta_ptr		rd	0
+dta_off		rw	1
+dta_seg		rw	1
+
+start_cluster	rw	1
+cluster_count	rw	1
+
+current_fatsec	dw	-1			; no FAT sector read yet
+fat16		dw	0			; defaults to 12 bit FAT
+
+;	single error message if BDOS can't be loaded:
+
+
+include	initmsgs.def				; Include TFT Header File
+
+
+;dos_msg	db	CR,LF,'Can''t load DOS file.$'
+
+
+;	static request header for DOS device driver I/O
+
+req_hdr		db	22
+req_unit	rb	1
+req_cmd		rb	1
+req_status	rw	1
+		rd	2
+req_media	rb	1
+		rb	16
+
+req1_return	equ	byte ptr req_media+1
+req1_volid	equ	word ptr req_media+2
+
+req2_bufoff	equ	word ptr req_media+1
+req2_bufseg	equ	word ptr req_media+3
+req2_bpb	equ	word ptr req_media+5
+
+req3_buffer	equ	dword ptr req_media+1
+req3_bufoff	equ	word ptr req_media+1
+req3_bufseg	equ	word ptr req_media+3
+req3_count	equ	word ptr req_media+5
+req3_sector	equ	word ptr req_media+7
+req3_volid	equ	word ptr req_media+9
+req3_sector32	equ	word ptr req_media+13
+
+;	local copy of the BPB for the boot device
+
+local_bpb		rb	0
+BT_bytes_per_sector	rw	1
+BT_sctr_per_cluster	rb	1
+BT_reserved_sectors	rw	1
+BT_nfats		rb	1
+BT_dirsize		rw	1
+BT_total_sectors	rw	1
+BT_fatid		rb	1
+BT_fat_size		rw	1
+BT_sectors_per_track 	rw	1
+BT_nheads		rw	1
+BT_hidden_sectors	rw	2
+BT_total_long		rw	2
+BPB_LENGTH		equ	(offset $-offset local_bpb)
+
+	extrn	sector_buffer:byte
+
+	end

IBMBIO/BDOSSTUB.A86

@@ -0,0 +1,48 @@
+;    File              : $BDOSSTUB.A86$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+
+CGROUP		group	INITCODE
+
+INITCODE	cseg	'INITCODE'
+
+	public	read_bdos
+read_bdos:
+	ret
+
+
+	public	bdos_version_check
+bdos_version_check:
+	ret
+
+	end

IBMBIO/BIN/BIOS.MAP

@@ -0,0 +1,418 @@
+LINK : warning L4021: no stack segment
+
+ Start  Stop   Length Name                   Class
+ 00000H 00616H 00617H CODE                   CODE
+ 00617H 00617H 00000H ENDCODE                ENDCODE
+ 00620H 0171FH 01100H RCODE_ALIGN            RCODE
+ 01720H 02692H 00F73H RCODE                  RCODE
+ 026A0H 027AFH 00110H RESUMECODE             RESUMECODE
+ 027B0H 031DFH 00A30H RESBIOS                RESBIOS
+ 031E0H 03905H 00726H ICODE                  ICODE
+ 03910H 0391FH 00010H IDATA                  IDATA
+ 03920H 064F5H 02BD6H INITCODE               INITCODE
+ 06500H 06637H 00138H STACKS                 STACKS
+ 06640H 079A6H 01367H INITDATA               INITDATA
+ 079B0H 07A1FH 00070H INITPSP                INITDATA
+ 07A20H 07B9DH 0017EH INITENV                INITDATA
+ 07BA0H 07BA0H 00000H DATAEND                INITDATA
+
+ Origin   Group
+ 0000:0   CGROUP
+
+  Address         Publics by Name
+
+ 0000:0000       A20ENABLE
+ 0000:4043       ALLOCHMA
+ 0000:417C       ALLOC_HISEG
+ 0000:414F       ALLOC_INSTSEG
+ 0000:41A4       ALLOC_SEG
+ 0000:77C4       BAD_BREAK
+ 0000:77EA       BAD_BUFFERS
+ 0000:7746       BAD_COMMAND
+ 0000:7931       BAD_COUNTRY
+ 0000:787F       BAD_DRIVPARM
+ 0000:7948       BAD_EXEC
+ 0000:782E       BAD_FCBS
+ 0000:776B       BAD_FILENAME
+ 0000:7806       BAD_FILES
+ 0000:7848       BAD_FOPEN
+ 0000:78E8       BAD_HISTORY
+ 0000:779A       BAD_LASTDRIVE
+ 0000:7781       BAD_SHELL
+ 0000:396E       BIOSINIT
+ 0000:7BA0       BIOSINIT_END
+ 0000:66B8       BIOS_SEG
+ 0000:667A       BIOS_TARGET_SEG
+ 0000:6C08       BLKDEV_TABLE
+ 0000:474E       BLOCK_DEVICE
+ 0000:6BE7       BOOT_DEVICE
+ 0000:6BEB       BOOT_DRV
+ 0000:7B80       BOOT_OPTIONS
+ 0000:0434       BPB160
+ 0000:0491       BPB360
+ 0000:04CF       BPB720
+ 0000:31E0       BPBS
+ 0000:0537       BPBTBL
+ 0000:6BE2       BUFFERSIN
+ 0000:4BCA       BUILD_CMD_TAIL
+ 0000:7203       CFG_FILE
+ 0000:724F       CFG_FILE_END
+ 0000:001A       CLEANUP
+ 0000:6BF0       CLKDEV_OFF
+ 0000:6BF2       CLKDEV_SEG
+ 0000:17DC       CLOCKTABLE
+ 0000:669C       CODE_PAGE
+ 0000:668F       COMSPEC_DRV
+ 0000:6BF4       CONDEV_OFF
+ 0000:6BF6       CONDEV_SEG
+ 0000:443B       CONFIG
+ 0000:4978       CONFIG_FINISH
+ 0000:4400       CONFIG_INIT
+ 0000:4C50       CONFIG_PROCESS
+ 0000:1900       CONSOLETABLE
+ 0000:022A       CONTROLBREAK
+ 0000:669A       COUNTRY_CODE
+ 0000:4401       COUNTRY_INIT
+ 0000:5A4A       CRLF
+ 0000:7175       CTRY_INFO
+ 0000:6676       CURRENT_DOS
+ 0000:1722       DATASEGMENT
+ 0000:0232       DAYCOUNT
+ 0000:7171       DBCS_TBL
+ 0000:0184       DEBLOCKSEG
+ 0000:71CA       DEBLOCKSETBYUSER
+ 0000:461C       DEVICE_INIT
+ 0000:4947       DEVICE_INSERT
+ 0000:6684       DEVICE_ROOT
+ 0000:6BE3       DEV_COUNT
+ 0000:6D6C       DEV_EPB
+ 0000:6D6C       DEV_LOAD_SEG
+ 0000:6D1C       DEV_NAME
+ 0000:6D6E       DEV_RELOC_SEG
+ 0000:1B97       DISKTABLE
+ 0000:262A       DISK_MSGA
+ 0000:2647       DISK_MSGB
+ 0000:266E       DIV_BY_ZERO_MSG
+ 0000:7A00       DOSVERSION
+ 0000:66BC       DOS_DSEG
+ 0000:798F       DOS_MSG
+ 0000:669E       DOS_NAME
+ 0000:6678       DOS_TARGET_SEG
+ 0000:61E3       DOS_VERSION_CHECK
+ 0000:6664       DRDOS_PTR
+ 0000:1724       DRIVERFUNCTION
+ 0000:0602       ENDBIOS
+ 0000:668A       EXT_MEM_SIZE
+ 0000:020C       FASTCONSOLE
+ 0000:6660       FUNC52_PTR
+ 0000:66D0       HIDOS
+ 0000:6ADA       HISTORY_FLG
+ 0000:6ADB       HISTORY_SIZE
+ 0000:3F43       HOOKINT2F
+ 0000:00B4       I13OFF_SAVE
+ 0000:00B4       I13POINTER
+ 0000:00B6       I13SEG_SAVE
+ 0000:0610       I13_AX
+ 0000:6670       ICODE_LEN
+ 0000:31F4       INIT0
+ 0000:6420       INITSTACKS
+ 0000:6BE0       INIT_BUF
+ 0000:668E       INIT_DRV
+ 0000:66BA       INIT_DSEG
+ 0000:668C       INIT_FLAGS
+ 0000:391A       INIT_RUNIT
+ 0000:46D2       INIT_STATIC_REQUEST
+ 0000:1A11       INT13DEBLOCK
+ 0000:01C0       INT13TRAP
+ 0000:1A04       INT13UNSURE
+ 0000:1B2D       INT2FHANDLER
+ 0000:01F7       INT2FTRAP
+ 0000:01B6       INTDISKTABLE
+ 0000:6CF6       INTERRUPT
+ 0000:6CF6       INTERRUPT_OFF
+ 0000:6CF8       INTERRUPT_SEG
+ 0000:66D5       LAST_DRV
+ 0000:0537       LAYOUT_TABLE
+ 0000:0234       LOCAL_BUFFER
+ 0000:0600       LOCAL_CHAR
+ 0000:0601       LOCAL_FLAG
+ 0000:0432       LOCAL_ID
+ 0000:052C       LOCAL_PARMS
+ 0000:03F2       LOCAL_PT
+ 0000:6BEE       MAX_CLSIZE
+ 0000:6BEC       MAX_SECSIZE
+ 0000:66C2       MEM_CURRENT
+ 0000:66C0       MEM_CURRENT_BASE
+ 0000:66C4       MEM_MAX
+ 0000:6688       MEM_SIZE
+ 0000:0008  Abs  NBPBS
+ 0000:6BE4       NEXT_DRV
+ 0000:5EF0       NLS_HOOK
+ 0000:6D70       NLS_TEMP_AREA
+ 0000:5F0C       NLS_UNHOOK
+ 0000:7743       NO_CHAR
+ 0000:0178       NUMDISKUNITS
+ 0000:6BE5       NUM_BLKDEV
+ 0000:6696       NUM_FCBS
+ 0000:6694       NUM_FILES
+ 0000:6698       NUM_FOPEN
+ 0000:6BE1       NUM_READ_AHEAD_BUF
+ 0000:6690       NUM_STACKS
+ 0000:0106       ORGINT13
+ 0000:0533       PARMS_GPL
+ 0000:0530       PARMS_SPT
+ 0000:71D2       PRELOAD_DRV
+ 0000:6674       RCODE_FIXUPS
+ 0000:6672       RCODE_LEN
+ 0000:666C       RCODE_OFFSET
+ 0000:666E       RCODE_SEG
+ 0000:6132       READ_DOS
+ 0000:18E0       READ_SYSTEM_TICKS
+ 0000:6C06       REL_UNIT
+ 0000:6CFE       REQUEST_HDR
+ 0000:00B8       REQ_OFF
+ 0000:00B8       REQ_PTR
+ 0000:00BA       REQ_SEG
+ 0000:6C00       RESDEV_CHAIN
+ 0000:462F       RESIDENT_DEVICE_INIT
+ 0000:26A0       RESUMEHANDLER
+ 0000:6668       RES_DDSC_PTR
+ 0000:6D70       SECTOR_BUFFER
+ 0000:001F       SERPARCHAR
+ 0000:24CE       SERPARCOMMONTABLE
+ 0000:001B       SERPARFLAG
+ 0000:40B8       SETUPHMA
+ 0000:48AE       SETUP_LDT
+ 0000:45C2       SETUP_STACKS
+ 0000:7A22       SHELL
+ 0000:670F       SHELL_CLINE
+ 0000:6692       STACK_SIZE
+ 0000:267F       STARTING_DOS_MSG
+ 0000:00BC       STRAT
+ 0000:6CF2       STRATEGY
+ 0000:6CF2       STRATEGY_OFF
+ 0000:6CF4       STRATEGY_SEG
+ 0000:3F68       UNHOOKINT2F
+ 0000:43E8       VERIFY386
+ 0000:4BBF       WHITESPACE
+ 0000:7740       YES_CHAR
+ 0000:77C4       _BAD_BREAK
+ 0000:77EA       _BAD_BUFFERS
+ 0000:7746       _BAD_COMMAND
+ 0000:7931       _BAD_COUNTRY
+ 0000:787F       _BAD_DRIVPARM
+ 0000:7948       _BAD_EXEC
+ 0000:782E       _BAD_FCBS
+ 0000:776B       _BAD_FILENAME
+ 0000:7806       _BAD_FILES
+ 0000:7848       _BAD_FOPEN
+ 0000:78E8       _BAD_HISTORY
+ 0000:779A       _BAD_LASTDRIVE
+ 0000:7781       _BAD_SHELL
+ 0000:262A       _DISK_MSGA
+ 0000:2647       _DISK_MSGB
+ 0000:266E       _DIV_BY_ZERO_MSG
+ 0000:798F       _DOS_MSG
+ 0000:7743       _NO_CHAR
+ 0000:267F       _STARTING_DOS_MSG
+ 0000:7740       _YES_CHAR
+
+  Address         Publics by Value
+
+ 0000:0000       A20ENABLE
+ 0000:0008  Abs  NBPBS
+ 0000:001A       CLEANUP
+ 0000:001B       SERPARFLAG
+ 0000:001F       SERPARCHAR
+ 0000:00B4       I13OFF_SAVE
+ 0000:00B4       I13POINTER
+ 0000:00B6       I13SEG_SAVE
+ 0000:00B8       REQ_PTR
+ 0000:00B8       REQ_OFF
+ 0000:00BA       REQ_SEG
+ 0000:00BC       STRAT
+ 0000:0106       ORGINT13
+ 0000:0178       NUMDISKUNITS
+ 0000:0184       DEBLOCKSEG
+ 0000:01B6       INTDISKTABLE
+ 0000:01C0       INT13TRAP
+ 0000:01F7       INT2FTRAP
+ 0000:020C       FASTCONSOLE
+ 0000:022A       CONTROLBREAK
+ 0000:0232       DAYCOUNT
+ 0000:0234       LOCAL_BUFFER
+ 0000:03F2       LOCAL_PT
+ 0000:0432       LOCAL_ID
+ 0000:0434       BPB160
+ 0000:0491       BPB360
+ 0000:04CF       BPB720
+ 0000:052C       LOCAL_PARMS
+ 0000:0530       PARMS_SPT
+ 0000:0533       PARMS_GPL
+ 0000:0537       LAYOUT_TABLE
+ 0000:0537       BPBTBL
+ 0000:0600       LOCAL_CHAR
+ 0000:0601       LOCAL_FLAG
+ 0000:0602       ENDBIOS
+ 0000:0610       I13_AX
+ 0000:1722       DATASEGMENT
+ 0000:1724       DRIVERFUNCTION
+ 0000:17DC       CLOCKTABLE
+ 0000:18E0       READ_SYSTEM_TICKS
+ 0000:1900       CONSOLETABLE
+ 0000:1A04       INT13UNSURE
+ 0000:1A11       INT13DEBLOCK
+ 0000:1B2D       INT2FHANDLER
+ 0000:1B97       DISKTABLE
+ 0000:24CE       SERPARCOMMONTABLE
+ 0000:262A       DISK_MSGA
+ 0000:262A       _DISK_MSGA
+ 0000:2647       DISK_MSGB
+ 0000:2647       _DISK_MSGB
+ 0000:266E       _DIV_BY_ZERO_MSG
+ 0000:266E       DIV_BY_ZERO_MSG
+ 0000:267F       _STARTING_DOS_MSG
+ 0000:267F       STARTING_DOS_MSG
+ 0000:26A0       RESUMEHANDLER
+ 0000:31E0       BPBS
+ 0000:31F4       INIT0
+ 0000:391A       INIT_RUNIT
+ 0000:396E       BIOSINIT
+ 0000:3F43       HOOKINT2F
+ 0000:3F68       UNHOOKINT2F
+ 0000:4043       ALLOCHMA
+ 0000:40B8       SETUPHMA
+ 0000:414F       ALLOC_INSTSEG
+ 0000:417C       ALLOC_HISEG
+ 0000:41A4       ALLOC_SEG
+ 0000:43E8       VERIFY386
+ 0000:4400       CONFIG_INIT
+ 0000:4401       COUNTRY_INIT
+ 0000:443B       CONFIG
+ 0000:45C2       SETUP_STACKS
+ 0000:461C       DEVICE_INIT
+ 0000:462F       RESIDENT_DEVICE_INIT
+ 0000:46D2       INIT_STATIC_REQUEST
+ 0000:474E       BLOCK_DEVICE
+ 0000:48AE       SETUP_LDT
+ 0000:4947       DEVICE_INSERT
+ 0000:4978       CONFIG_FINISH
+ 0000:4BBF       WHITESPACE
+ 0000:4BCA       BUILD_CMD_TAIL
+ 0000:4C50       CONFIG_PROCESS
+ 0000:5A4A       CRLF
+ 0000:5EF0       NLS_HOOK
+ 0000:5F0C       NLS_UNHOOK
+ 0000:6132       READ_DOS
+ 0000:61E3       DOS_VERSION_CHECK
+ 0000:6420       INITSTACKS
+ 0000:6660       FUNC52_PTR
+ 0000:6664       DRDOS_PTR
+ 0000:6668       RES_DDSC_PTR
+ 0000:666C       RCODE_OFFSET
+ 0000:666E       RCODE_SEG
+ 0000:6670       ICODE_LEN
+ 0000:6672       RCODE_LEN
+ 0000:6674       RCODE_FIXUPS
+ 0000:6676       CURRENT_DOS
+ 0000:6678       DOS_TARGET_SEG
+ 0000:667A       BIOS_TARGET_SEG
+ 0000:6684       DEVICE_ROOT
+ 0000:6688       MEM_SIZE
+ 0000:668A       EXT_MEM_SIZE
+ 0000:668C       INIT_FLAGS
+ 0000:668E       INIT_DRV
+ 0000:668F       COMSPEC_DRV
+ 0000:6690       NUM_STACKS
+ 0000:6692       STACK_SIZE
+ 0000:6694       NUM_FILES
+ 0000:6696       NUM_FCBS
+ 0000:6698       NUM_FOPEN
+ 0000:669A       COUNTRY_CODE
+ 0000:669C       CODE_PAGE
+ 0000:669E       DOS_NAME
+ 0000:66B8       BIOS_SEG
+ 0000:66BA       INIT_DSEG
+ 0000:66BC       DOS_DSEG
+ 0000:66C0       MEM_CURRENT_BASE
+ 0000:66C2       MEM_CURRENT
+ 0000:66C4       MEM_MAX
+ 0000:66D0       HIDOS
+ 0000:66D5       LAST_DRV
+ 0000:670F       SHELL_CLINE
+ 0000:6ADA       HISTORY_FLG
+ 0000:6ADB       HISTORY_SIZE
+ 0000:6BE0       INIT_BUF
+ 0000:6BE1       NUM_READ_AHEAD_BUF
+ 0000:6BE2       BUFFERSIN
+ 0000:6BE3       DEV_COUNT
+ 0000:6BE4       NEXT_DRV
+ 0000:6BE5       NUM_BLKDEV
+ 0000:6BE7       BOOT_DEVICE
+ 0000:6BEB       BOOT_DRV
+ 0000:6BEC       MAX_SECSIZE
+ 0000:6BEE       MAX_CLSIZE
+ 0000:6BF0       CLKDEV_OFF
+ 0000:6BF2       CLKDEV_SEG
+ 0000:6BF4       CONDEV_OFF
+ 0000:6BF6       CONDEV_SEG
+ 0000:6C00       RESDEV_CHAIN
+ 0000:6C06       REL_UNIT
+ 0000:6C08       BLKDEV_TABLE
+ 0000:6CF2       STRATEGY
+ 0000:6CF2       STRATEGY_OFF
+ 0000:6CF4       STRATEGY_SEG
+ 0000:6CF6       INTERRUPT_OFF
+ 0000:6CF6       INTERRUPT
+ 0000:6CF8       INTERRUPT_SEG
+ 0000:6CFE       REQUEST_HDR
+ 0000:6D1C       DEV_NAME
+ 0000:6D6C       DEV_LOAD_SEG
+ 0000:6D6C       DEV_EPB
+ 0000:6D6E       DEV_RELOC_SEG
+ 0000:6D70       NLS_TEMP_AREA
+ 0000:6D70       SECTOR_BUFFER
+ 0000:7171       DBCS_TBL
+ 0000:7175       CTRY_INFO
+ 0000:71CA       DEBLOCKSETBYUSER
+ 0000:71D2       PRELOAD_DRV
+ 0000:7203       CFG_FILE
+ 0000:724F       CFG_FILE_END
+ 0000:7740       YES_CHAR
+ 0000:7740       _YES_CHAR
+ 0000:7743       _NO_CHAR
+ 0000:7743       NO_CHAR
+ 0000:7746       _BAD_COMMAND
+ 0000:7746       BAD_COMMAND
+ 0000:776B       _BAD_FILENAME
+ 0000:776B       BAD_FILENAME
+ 0000:7781       _BAD_SHELL
+ 0000:7781       BAD_SHELL
+ 0000:779A       BAD_LASTDRIVE
+ 0000:779A       _BAD_LASTDRIVE
+ 0000:77C4       _BAD_BREAK
+ 0000:77C4       BAD_BREAK
+ 0000:77EA       BAD_BUFFERS
+ 0000:77EA       _BAD_BUFFERS
+ 0000:7806       _BAD_FILES
+ 0000:7806       BAD_FILES
+ 0000:782E       BAD_FCBS
+ 0000:782E       _BAD_FCBS
+ 0000:7848       BAD_FOPEN
+ 0000:7848       _BAD_FOPEN
+ 0000:787F       _BAD_DRIVPARM
+ 0000:787F       BAD_DRIVPARM
+ 0000:78E8       _BAD_HISTORY
+ 0000:78E8       BAD_HISTORY
+ 0000:7931       _BAD_COUNTRY
+ 0000:7931       BAD_COUNTRY
+ 0000:7948       _BAD_EXEC
+ 0000:7948       BAD_EXEC
+ 0000:798F       _DOS_MSG
+ 0000:798F       DOS_MSG
+ 0000:7A00       DOSVERSION
+ 0000:7A22       SHELL
+ 0000:7B80       BOOT_OPTIONS
+ 0000:7BA0       BIOSINIT_END
+
+Program entry point at 0000:0000

IBMBIO/BIOS.LNK

@@ -0,0 +1,4 @@
+.\bin\biosgrps+.\bin\init+.\bin\clock+.\bin\console+.\bin\disk+
+.\bin\serpar+.\bin\biosmsgs+.\bin\biosinit+.\bin\config+.\bin\genercfg+
+.\bin\nlsfunc+.\bin\bdosldr+.\bin\stacks+.\bin\initmsgs
+.\bin\bios,.\bin\bios,.\bin\biosstub.lib /MAP;

IBMBIO/BIOSGRPS.ASM

@@ -0,0 +1,39 @@
+;    File              : $BIOSGRPS.ASM$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+
+CGROUP	group	CODE,ENDCODE,RCODE_ALIGN,RCODE,RESUMECODE,RESBIOS,ICODE,IDATA,INITCODE,STACKS,INITDATA,INITPSP,INITENV,DATAEND
+
+	include BIOSGRPS.EQU
+
+		end

IBMBIO/BIOSGRPS.EQU

@@ -0,0 +1,75 @@
+;    File              : $BIOSGRPS.EQU$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+CODE		segment public byte 'CODE'
+CODE		ends
+
+ENDCODE		segment public byte 'ENDCODE'
+ENDCODE		ends
+
+RCODE_ALIGN	segment public para 'RCODE'
+RCODE_ALIGN	ends
+
+RCODE		segment public word 'RCODE'
+RCODE		ends
+
+RESUMECODE	segment public para 'RESUMECODE'
+RESUMECODE	ends
+
+RESBIOS		segment public para 'RESBIOS'
+RESBIOS		ends
+
+ICODE		segment public word 'ICODE'
+ICODE		ends
+
+IDATA		segment public para 'IDATA'
+IDATA		ends
+
+INITCODE	segment public para 'INITCODE'
+INITCODE	ends
+
+STACKS		segment	public para 'STACKS'
+STACKS		ends
+
+INITDATA	segment public para 'INITDATA'
+INITDATA	ends
+
+INITPSP		segment public para 'INITDATA'
+INITPSP		ends
+
+INITENV		segment public para 'INITDATA'
+INITENV		ends
+
+DATAEND		segment public para 'INITDATA'
+DATAEND		ends
+

IBMBIO/BIOSMSGS.ASM

@@ -0,0 +1,36 @@
+NUL	equ	0
+BS	equ	8
+TAB	equ	9
+LF	equ	10
+CR	equ	13
+
+include BIOSGRPS.EQU
+
+CGROUP	group	RCODE
+
+
+RCODE	segment	word public 'RCODE'
+
+;		Source .TFT file: 'TMP1.$$$'
+	public	_disk_msgA
+	public	disk_msgA
+disk_msgA	label	byte
+_disk_msgA	db	CR, LF, "Insert diskette for drive ", NUL
+	public	_disk_msgB
+	public	disk_msgB
+disk_msgB	label	byte
+_disk_msgB	db	": and", CR, LF, "   strike any key when ready", CR, LF, LF, NUL
+	public	_div_by_zero_msg
+	public	div_by_zero_msg
+div_by_zero_msg	label	byte
+_div_by_zero_msg	db	CR, LF, "Divide Error", CR, LF, NUL
+	public	_starting_dos_msg
+	public	starting_dos_msg
+starting_dos_msg	label	byte
+_starting_dos_msg	db	CR, LF, "Starting DOS...", CR, LF, NUL
+
+RCODE	ends
+
+
+	end
+

IBMBIO/BIOSMSGS.DEF

@@ -0,0 +1,8 @@
+	extrn	_disk_msgA	: byte
+	extrn	disk_msgA	: byte
+	extrn	_disk_msgB	: byte
+	extrn	disk_msgB	: byte
+	extrn	_div_by_zero_msg	: byte
+	extrn	div_by_zero_msg	: byte
+	extrn	_starting_dos_msg	: byte
+	extrn	starting_dos_msg	: byte

IBMBIO/BIOSMSGS.H

@@ -0,0 +1,4 @@
+extern char near disk_msgA[];
+extern char near disk_msgB[];
+extern char near div_by_zero_msg[];
+extern char near starting_dos_msg[];

IBMBIO/BPB.EQU

@@ -0,0 +1,50 @@
+;    File              : $BPB.EQU$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;    ENDLOG
+
+BPB		struc
+BPB_SECSIZ	dw	?	; # of bytes per sector 
+BPB_ALLOCSIZ	db	?	; # of sectors per allocation unit
+BPB_FATADD	dw	?	; # of reserved sectors (1)
+BPB_NFATS	db	?	; # of fats
+BPB_DIRMAX	dw	?	; # of directory entries
+BPB_TOTSEC	dw	?	; # of sectors total in image
+BPB_FATID	db	?	;  holds a copy of the fat id byte
+BPB_FATSEC	dw	?	; # of sectors in a fat
+BPB_SPT		dw	?	; # of sectors per track
+BPB_HEADS	dw	?	; # of heads
+BPB_HIDDEN	dd	?	; disk offset (32 bit)
+BPB_SIZE	dd	?	; disk size (32 bit)
+BPB_RESRVD2	db	6 dup (?)
+BPB		ends
+
+BPB_LENGTH	equ	size BPB

IBMBIO/CHAR.DEF

@@ -0,0 +1,74 @@
+;    File              : $CHAR.DEF$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+;************************************************;
+;*						*;
+;*	      Character Definitions		*;
+;*						*;
+;************************************************;
+
+CTLA		equ	'A' - '@'
+CTLB		equ	'B' - '@'
+CTLC		equ	'C' - '@'
+CTLD		equ	'D' - '@'
+CTLE		equ	'E' - '@'
+CTLF		equ	'F' - '@'
+CTLG		equ	'G' - '@'
+BELL		equ	'G' - '@'
+CTLH		equ	'H' - '@'
+CTLI		equ	'I' - '@'
+TAB		equ	'I' - '@'
+CTLJ		equ	'J' - '@'
+LF		equ	'J' - '@'
+CTLK		equ	'K' - '@'
+CTLM		equ	'M' - '@'
+CR		equ	'M' - '@'
+CTLP		equ	'P' - '@'
+CTLQ		equ	'Q' - '@'
+CTLR		equ	'R' - '@'
+CTLS		equ	'S' - '@'
+CTLT		equ	'T' - '@'
+CTLU		equ	'U' - '@'
+CTLV		equ	'V' - '@'
+CTLW		equ	'W' - '@'
+CTLX		equ	'X' - '@'
+CTLY		equ	'Y' - '@'
+CTLZ		equ	'Z' - '@'
+ESC		equ	'[' - '@'
+CTLBS		equ	'\' - '@'
+CTLUB		equ	'_' - '@'
+CTLUP		equ	'^' - '@'
+DEL		equ	07Fh
+RUBOUT		equ	DEL
+
+CTL		equ	'^'

IBMBIO/CLOCK.ASM

@@ -0,0 +1,467 @@
+;    File              : $CLOCK.ASM$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;    CLOCK.ASM 1.12 93/07/22 19:43:10
+;    switch over to REQUEST.EQU
+;    ENDLOG
+
+	include BIOSGRPS.EQU
+	include	DRMACROS.EQU		; standard DR macros
+	include	IBMROS.EQU		; ROM BIOS equates
+	include	REQUEST.EQU		; request header equates
+	include	DRIVER.EQU		; device driver equates
+
+page
+CGROUP	group	CODE, RCODE, RESUMECODE, ICODE
+
+CG	equ	offset CGROUP
+
+TIME	struc
+DAYS		dw	?
+MINUTES		db	?
+HOURS		db	?
+HUNDREDTHS	db	?
+SECONDS		db	?
+TIME	ends
+
+	Assume	CS:CGROUP, DS:CGROUP, ES:Nothing, SS:Nothing
+
+CODE	segment 'CODE'
+
+	extrn	endbios:word		; for device driver INIT function
+	extrn	daycount:word
+	
+; There are 1193180/65536 ticks per second, or 0E90Bh/10000h ticks per 5/100th.
+
+CONVERSION_FACTOR	equ	0E90Bh
+
+CODE	ends
+
+RCODE	segment 'RCODE'
+
+	extrn	DataSegment:word
+
+monlen		db	31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+
+
+	Public	ClockTable
+
+ClockTable:
+	db	9			; Last supported function
+	dw	CG:dd_init		; 0-initialize driver
+	dw	CG:dd_error		; 1-media change check (disks only)
+	dw	CG:dd_error		; 2-build BPB (disks only)
+	dw	CG:dd_error		; 3-IOCTL string input
+	dw	CG:dd_input		; 4-input
+	dw	CG:dd_error		; 5-nondestructive input (char only)
+	dw	CG:dd_error		; 6-input status (char only)
+	dw	CG:dd_error		; 7-input flush
+	dw	CG:dd_output		; 8-output
+	dw	CG:dd_output		; 9-output with verify
+
+page
+driver	proc	near
+
+dd_error:	; used for all unsupported driver functions
+;--------
+	mov	ax,RHS_ERROR+3		; "invalid command" error
+	ret
+
+dd_input:	; 4-input
+;--------
+	les	di,es:RH4_BUFFER[bx]	; ES:DI -> requested date/time buffer
+	call	read_system_ticks	; read system tick counter
+	mov	ax,daycount		; AX = date
+	stosw				; return date
+	push	dx			; save low word of ticks
+	mov	ax,5
+	mul	cx			; multiply high word of ticks by 5
+	xchg	ax,cx			; save result in CX
+	pop	dx
+	mov	ax,5
+	mul	dx			; multiply low word of tick by 5
+	add	dx,cx			;  and add in high word
+	mov	bx,CONVERSION_FACTOR
+	div	bx			; convert to centi-secs
+	push	ax			; save high word of result
+	xor	ax,ax
+	div	bx			; divide remainder
+	pop	dx			; recover high word of result
+					;  giving us time in centi-secs
+	mov	bx,60*100		; BX = centi-secs/minute
+	div	bx			; AX = # minutes
+	push	dx			; save centi-secs remainder
+	cwd				; DX = 0
+	mov	bx,60+(256*100)		; BL = minutes/hour,BH = centi-secs/sec
+	div	bl			; AL = hours, AH = minutes remainder
+	xchg	al,ah
+	stosw				; return minutes then hours
+	pop	ax			; recover centi-secs remainder
+	div	bh			; AL = secs, AH = centi-secs remainder
+	xchg	al,ah
+	stosw				; return centi-secs then secs
+	sub	ax,ax
+	ret
+
+	page
+
+dd_output:	; 8-output
+;---------
+	les	si,es:RH4_BUFFER[bx]
+
+;	First we'll convert the date & set the RTC if present:
+
+	mov	ax,es:DAYS[si]		; # of days since 1/1/1980
+	mov	daycount,ax
+
+	mov	dx,1980			; get initial year
+output1:
+	mov	cx,365			; assumed year size
+	test	dl,3			; test for leap years
+	 jnz	output2			; skip if not a leap year
+	inc	cx			; leap years have 366 days
+output2:
+	cmp	ax,cx			; more days than this year?
+	 jb	output3			; skip if less - same year
+	sub	ax,cx			; else date in future year
+	inc	dx			; subtract from total, next year
+	jmps	output1			; check again
+
+output3:				; DX = binary year, AX = day in year
+	sub	bx,bx			; start with January
+	sub	cx,cx			; CH = 0
+output4:
+	mov	cl,cs:monlen[bx]	; CX = # of days in next month
+	cmp	cl,28			; is it february ?
+	 jne	output5
+	test	dl,3			; is it a leap year ?
+	 jnz	output5
+	inc	cx			; leap years have 29 days in february
+output5:
+	cmp	ax,cx			; remaining day count >= month length?
+	 jb	output6			; skip if right month found
+	sub	ax,cx			; else subtract days in that month
+	inc	bx			; move on to next month
+	jmps	output4			; repeat until month found
+
+output6:				; DX = binary year
+	inc	ax			; AX = day-1    =>  convert to day
+	inc	bx			; BX = month-1  =>  convert to month
+	mov	ah,bl			; high byte is month
+	call	bin2bcd			; convert to month
+
+	xchg	ax,dx			; DL, DH = day, month of date
+					; AX = binary year
+
+	mov	bl,100
+	div	bl			; AL = century, AH = year
+	xchg	al,ah			; AH = century, AL = year
+	call	bin2bcd			; convert AL, AH from binary to BCD
+	xchg	ax,cx			; CL, CH = year, century for date
+
+	mov	ah,5			; set real time clock date
+	int	RTC_INT			;    on AT, XT-286, PS/2, etc.
+
+;	Now we'll convert the time & set the RTC if present
+
+;	mov	ah,es:HOURS[si]
+;	mov	al,es:MINUTES[si]		; get binary hours & minutes
+	mov	ax,es:word ptr MINUTES[si]
+	call	bin2bcd			; convert to BCD values
+	xchg	ax,cx			; CH, CL = hh:mm in BCD
+	mov	ah,es:SECONDS[si]
+	mov	al,0			; get binary seconds & no daylight saving
+	call	bin2bcd			; convert to BCD values
+	xchg	ax,dx			; DH, DL = ss.000 in BCD
+
+	mov	ah,3			; set real time clock time
+	int	RTC_INT			;    on AT, XT-286, PS/2, etc.
+
+	mov	al,100
+	mul	es:SECONDS[si]		; AX = seconds in hundredths
+	xchg	ax,dx			; save in DX
+	mov	al,es:HUNDREDTHS[si]
+	cbw				; AX = hundredths
+	add	ax,dx			; AX = secs and hundredths in 1/100ths
+	cwd				; make the a dword
+	mov	bx,5
+	div	bx			; AX = secs and hundredths in 5/100ths
+	xchg	ax,bx			; save in BX
+	mov	al,60			; convert hours into minutes
+	mul	es:HOURS[si]		; AX = hours in mins
+	xchg	ax,dx
+	mov	al,es:MINUTES[si]
+	cbw				; AX = minutes value
+	add	ax,dx			; AX = hours and mins in mins
+	mov	dx,60*20
+	mul	dx			; DX:AX = hours and mins in 5/100ths
+	add	ax,bx
+	adc	dx,0			; DX:AX = total in 5/100ths
+	mov	bx,CONVERSION_FACTOR	; load up our magic value
+	push	dx			; save high word
+	mul	bx			; DX = low word result
+	mov	cx,dx			;  save for later
+	pop	ax			; recover high word
+	mul	bx			; DX:AX = result from high word
+	add	ax,cx			; add low and high word results
+	adc	dx,0			;  together in DX:AX
+	xchg	ax,dx			; DX = low word of result
+	xchg	ax,cx			; CX = high word of result
+
+	mov	ah,1			; set system timer
+	int	RTC_INT			; CX = high word, DX = low word
+
+	sub	ax,ax			; return successfully when done
+	ret
+
+
+	Public	read_system_ticks
+
+read_system_ticks:
+;-----------------
+	mov	ah,0			; read system tick counter
+	int	RTC_INT
+	test	al,al			; have we passed midnight ?
+	 jz	read_st10		; if so a new day has dawned
+	inc	daycount
+read_st10:
+	ret
+
+bin2bcd:	; convert AL and AH to BCD values
+;-------
+	call	bin2bcd1		; swap AL, AH, convert to BCD
+;	call	bin2bcd1
+;	ret
+bin2bcd1:
+	push	cx
+	mov	ch,ah			; save AH in scratch register
+	aam				; AL = AL % 10; AH = AL/10;
+	mov	cl,4
+	shl	ah,cl			; shift tens into high nibble
+	or	ah,al			; combine the nibbles
+	mov	al,ch			; restore the high byte into low byte
+	pop	cx
+	ret
+
+driver	endp
+
+RCODE	ends				; end of device driver code
+
+RESUMECODE segment 'RESUMECODE'
+
+; If the system ROM BIOS supports RESUME mode then it will call Int 6C
+; when returning from sleep mode. We take this over and reset the clock
+; based upon the RTC value. To save space we only relocate the code if
+; required.
+;
+
+	Public	ResumeHandler
+ResumeHandler	proc	far
+	sti
+	mov	ax,cs:DataSegment	; we have been asleep and are being
+	mov	ds,ax			;  woken by the BIOS
+	mov	es,ax			; lets re-read the RTC before
+	call	set_clock		;  we return to them
+	clc
+	ret	2
+ResumeHandler	endp
+
+set_monlen	db	31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+
+
+set_clock:
+;---------
+; We may also be called after a RESUME when we have to reset the time.
+
+	mov	ah,2			; read real time clock
+	xor	cx,cx
+	xor	dx,dx			; assume it won't work
+	stc
+	int	RTC_INT			; CH = hours, CL = mins, DH = secs
+	 jc	set_clock40		; (all in BCD remember)
+
+	xchg	al,dh			; AL = secs
+	call	bcd2bin			; AL = secs in binary
+	cmp	al,59
+	 ja	set_clock40		; reject invalid seconds
+	mov	ah,100
+	mul	ah			; AX = seconds in hundredths
+	cwd				; make it a dword
+	mov	bx,5
+	div	bx			; AX = secs and hundredths in 5/100ths
+	xchg	ax,bx			; save in BX
+
+	mov	al,ch			; AL = hours in BCD
+	call	bcd2bin			; AL = hours in binary
+	cmp	al,23
+	 ja	set_clock40		; reject invalid hours
+	mov	ah,60			; convert hours into minutes
+	mul	ah			; AX = hours in mins
+	xchg	ax,dx			; save in DX
+
+	mov	al,cl			; AL = mins in BCD
+	call	bcd2bin			; AL = mins in binary
+	cmp	al,59
+	 je	set_clock40		; reject invalid mins
+	cbw				; AX = minutes value
+	add	ax,dx			; AX = hours and mins in mins
+	mov	dx,60*20
+	mul	dx			; DX:AX = hours and mins in 5/100ths
+	add	ax,bx
+	adc	dx,0			; DX:AX = total in 5/100ths
+	mov	bx,CONVERSION_FACTOR	; load up our magic value
+	push	dx			; save high word
+	mul	bx			; DX = low word result
+	mov	cx,dx			;  save for later
+	pop	ax			; recover high word
+	mul	bx			; DX:AX = result from high word
+	add	ax,cx			; add low and high word results
+	adc	dx,0			;  together in DX:AX
+	xchg	ax,dx			; DX = low word of result
+	xchg	ax,cx			; CX = high word of result
+
+	mov	ah,1			; set system timer
+	int	RTC_INT			; CX = high word, DX = low word
+
+set_clock40:
+	mov	ah,4			; read RTC (if present)
+	int	RTC_INT			; validate date - CMOS may be corrupt
+	cmp	cx,1980h		; Too low?
+	 jb	set_clock45		; Yes so skip
+	cmp	cx,2099h		; Too high ?
+	 ja	set_clock45		; Yes so skip
+	cmp	dx,0101h		; Too low?
+	 jb	set_clock45		; Yes so skip
+	cmp	dx,3112h		; Too high ?
+	 jbe	set_clock50		; No its okay so scram
+set_clock45:	
+    mov cx,1980h        ; assume the year 1980
+	mov	dx,0101h		; assume 1st of January of that year
+set_clock50:
+	xchg	ax,cx			; AL, AH = year, century in BCD
+	call	bcd2bin			; convert values to binary
+	xchg	ax,cx			
+	xchg	ax,dx			; AL, AH = day, month in BCD
+	call	bcd2bin			; convert values to binary
+	xchg	ax,dx
+
+	mov	daycount,0		; zero the daycount in case of RESUME
+    mov ax,19*256 + 80      ; assume 1980 
+set_clock55:
+	cmp	ax,cx			; same year?
+	 je	set_clock65
+	mov	bx,365			; assume 365 days in that year
+	test	al,3			; test for leap year
+	 jnz	set_clock60		; (this works til 2400 A.D.)
+	inc	bx			; add FEB 29 if divisible by four
+set_clock60:
+	add	daycount,bx		; add days in previous year to total
+	inc	al			; next year
+	cmp	al,100			; end of century?
+	 jb	set_clock55		; skip if same century
+	mov	al,0			; continue with XX00
+	inc	ah			;   ...next century
+	jmps	set_clock55		; check year again
+
+
+set_clock65:				; same year by now
+	xchg	ax,cx			; CX = year
+	sub	dx,0101h		; make month, day 0 relative
+	sub	bx,bx			; assume January
+	sub	ax,ax			; AH = 0
+set_clock70:
+	cmp	dh,bl			; does current month match?
+	 je	set_clock80		; skip if it does
+	mov	al,cs:set_monlen[bx]	; get length of that month
+	cmp	al,28			; is it february ?
+	 jne	set_clock75
+	test	cl,3			; is it a leap year ?
+	 jnz	set_clock75
+	inc	ax			; leap year, 29 days in february
+set_clock75:
+	add	daycount,ax		; add it to total day count
+	inc	bx			; move on to next month
+	jmps	set_clock70
+
+set_clock80:
+	mov	al,dl			; get days in that month
+	add	daycount,ax		; add them to day count
+	ret
+
+bcd2bin:
+;-------
+;	entry:	AL, AH = BCD values
+;		AL, AH = binary equivalents
+
+	call	bcd2bin1		; swap AL, AH, convert AL to binary
+;	call	bcd2bin1		; swap AL, AH, convert AL to binary
+;	ret
+
+bcd2bin1:				; convert BCD to binary
+	xchg	al,ah			; swap the two values
+	push	bx
+	mov	bl,0			; start off without tens
+bcd2bin2:
+	cmp	al,10h			; check if more tens
+	 jb	bcd2bin3		; all tens done
+	sub	al,10h			; else subtract 10 in BCD
+	add	bl,10			; ...and add it in binary
+	jmps	bcd2bin2		; repeat for all tens
+bcd2bin3:				; AL = ones, BL = tens
+	add	al,bl			; AL = binary value
+	pop	bx			; restore BX
+	ret
+
+
+RESUMECODE ends
+
+
+ICODE	segment 'ICODE'			; initialization code
+
+	Assume	CS:CGROUP, DS:CGROUP
+
+dd_init:	; 0-initialize driver
+;-------
+	call	set_clock		; set elapsed ticks
+
+	les	bx,REQUEST[bp]		; ES:BX -> request header
+
+	mov	ax,endbios
+	mov	es:RH0_RESIDENT[bx],ax	; set end of device driver
+	mov	es:RH0_RESIDENT+2[bx],ds
+
+	sub	ax,ax			; initialization succeeded
+	ret				; (BIOS init always does...)
+
+
+ICODE	ends
+
+	end

IBMBIO/CONFIG.EQU

@@ -0,0 +1,124 @@
+;    File              : $CONFIG.EQU$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+
+
+DOS5		equ	0FFFFh
+
+if DOS5
+MOVE_DOWN	equ	1800h		; start relocated code 96K down
+else
+MOVE_DOWN	equ	2500h		; start relocated code 148K down
+endif
+
+NUM_BUFFS	equ	4
+SIZEOF_BUFFS	equ	1024+32		; allow for large sectors during init
+
+CONFIG_BUF	equ	ds:byte ptr .0
+CONFIG_BUF_SIZE	equ	 8*1024		; CONFIG.SYS read in this size chunks
+INIT_BUFFERS	equ	CONFIG_BUF+CONFIG_BUF_SIZE
+if DOS5
+INIT_BUFFERS_SIZE equ	NUM_BUFFS*SIZEOF_BUFFS
+					; reserve space for init disk buffers
+TEMP_LDT	equ	INIT_BUFFERS+INIT_BUFFERS_SIZE
+					; space for temp LDT's at CONFIG time
+TEMP_LDT_SIZE	equ	 ((26*58h)/16)*16+20h
+else
+INIT_BUFFERS_SIZE equ	NUM_BUFFS*(512+16)	; reserve space for init disk buffers
+TEMP_LDT	equ	INIT_BUFFERS+INIT_BUFFERS_SIZE
+					; space for temp LDT's at CONFIG time
+TEMP_LDT_SIZE	equ	 ((26*51h)/16)*16+20h
+endif
+DYNAMIC_DATA_END equ	TEMP_LDT+TEMP_LDT_SIZE
+
+BLKDEV_LENGTH	equ	9		; # of bytes per block device init entry
+	
+MAX_PATHLEN	equ	65		; Maximum Path Length
+MAX_FILELEN	equ	80		; Maximum File Length
+EOF		equ	01ah		; End of File Marker
+
+MIN_NUM_BUFFS	equ	3		; minimum # of disk buffers required
+MAX_NUM_BUFFS	equ	99		; maximum # of disk buffers supported
+DEF_NUM_BUFFS	equ	1		; 1 during config to so most go hi
+
+MIN_READ_AHEAD	equ	1		; minimum read-ahead
+MAX_READ_AHEAD	equ	99		; maximum read-ahead
+DEF_READ_AHEAD	equ	0		; default no read-ahead
+;
+;	DEF_NUM_FILES must be less than MIN_NUM_FILES in order to
+;	force two file structure allocations Windows will FAIL if this 
+;	is not TRUE.
+;
+MIN_NUM_FILES	equ	8		; minimum # of files required
+MAX_NUM_FILES	equ	255		; maximum # of files supported
+DEF_NUM_FILES	equ	1		; default # of files (+4 FCBS)
+
+MIN_NUM_FCBS	equ	0		; minimum # of fcbs required
+MAX_NUM_FCBS	equ	255		; maximum # of fcbs supported
+DEF_NUM_FCBS	equ	4		; default # of fcb handles
+
+MIN_NUM_FOPEN	equ	0		; minimum # of hashed files required
+MAX_NUM_FOPEN	equ	32768		; maximum # of hashed files supported
+DEF_NUM_FOPEN	equ	4096		; default # of files on normal system
+
+MIN_NUM_STACKS	equ	8		; on hardware interrupts swap stacks
+MAX_NUM_STACKS	equ	64		;  to a dynamically allocated one
+DEF_NUM_STACKS	equ	0		; zero is a special case - no swapping
+
+MIN_SIZE_STACK	equ	32		; the dynamic stacks are this size
+MAX_SIZE_STACK	equ	512
+DEF_SIZE_STACK	equ	128		; default size
+
+CFG_BUF_LEN	equ	256		; Length of CONFIG.SYS line buffer
+
+DEF_COUNTRY	equ	1		; USA
+DEF_CODEPAGE	equ	0		; No codepage
+
+DELWATCH	equ	0FFFFh
+
+RLF_ENHANCED	equ	0000$0001b	; Enhanced features are on
+RLF_INS		equ	0000$0010b	; Insert Flag
+RLF_SEARCH	equ	0000$0100b 	; Search mode on
+RLF_MATCH	equ	0000$1000b	; We are matching a command
+
+BUFFERS_IN_HMA	equ	0000$0001b
+BUFFERS_IN_UMB	equ	0000$0010b
+
+DMD_ID          equ     es:byte ptr .0	; id code ('M' or 'Z')
+DMD_PSP         equ     es:word ptr .1	; owner of memory block
+DMD_LEN         equ     es:word ptr .3	; length of memory block
+DMD_NAME	equ	es:byte ptr .8	; ASCIIZ name field
+DMD_NAME_LEN	equ	8		;  8 Bytes long
+IDM             equ     'M'		; not last id code
+IDZ             equ     'Z'		; last id code
+

IBMBIO/CONFSTUB.A86

@@ -0,0 +1,45 @@
+;    File              : $CONFSTUB.A86$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+
+CGROUP		group	INITCODE
+INITCODE	CSEG	PARA 'INITCODE'
+
+	Public config_process
+config_process:		; Process CONFIG.SYS
+	ret
+
+	Public	country_error
+country_error:
+	ret
+	end

IBMBIO/CONSOLE.ASM

@@ -0,0 +1,307 @@
+;    File              : $Workfile$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    CONSOLE.ASM 1.8 93/07/22 19:43:16
+;    switch over to REQUEST.EQU
+;    CONSOLE.ASM 1.7 93/07/19 18:57:15
+;    Add header
+;
+;    ENDLOG
+
+	include BIOSGRPS.EQU
+    include DRMACROS.EQU    ; standard DR macros
+	include	IBMROS.EQU		; ROM BIOS equates
+	include	REQUEST.EQU		; request header equates
+	include	DRIVER.EQU		; device driver equates
+
+page
+CGROUP	group	CODE, RCODE, ICODE
+
+CG	equ	offset CGROUP
+
+	Assume	CS:CGROUP, DS:CGROUP, ES:CGROUP, SS:CGROUP
+
+CODE	segment 'CODE'
+
+INSERT_ACTIVE	equ	2		; set if cmdline insert active
+
+	extrn	endbios:word		; for device driver INIT function
+	extrn	FastConsole:far		; console output vector
+    extrn   ControlBreak:far    ; ^C program abort
+	extrn	local_flag:byte
+	extrn	local_char:byte
+
+CODE	ends
+
+RCODE	segment 'RCODE'
+
+;	Device driver function table
+
+	Public	ConsoleTable
+
+ConsoleTable:
+	db	14			; Last supported command
+	dw	CG:dd_init		; 0-initialize driver
+	dw	CG:dd_error		; 1-media change check (disks only)
+	dw	CG:dd_error		; 2-build BPB (disks only)
+	dw	CG:dd_inioctl		; 3-IOCTL string input
+	dw	CG:dd_input		; 4-input
+	dw	CG:dd_poll		; 5-nondestructive input (char only)
+	dw	CG:dd_instat		; 6-input status (char only)
+	dw	CG:dd_inflush		; 7-input flush
+	dw	CG:dd_output		; 8-output
+	dw	CG:dd_output		; 9-output with verify
+	dw	CG:dd_outstat		; 10-output status (char only)
+	dw	CG:dd_outflush		; 11-output flush (char only)
+	dw	CG:dd_outioctl		; 12-IOCTL string output
+	dw	CG:dd_open		; 13-device open
+	dw	CG:dd_close		; 14-device close
+
+
+	Assume	DS:CGROUP, ES:Nothing, SS:Nothing
+
+page
+driver	proc	near
+
+dd_outioctl:
+;-----------
+	mov	cx,es:RH4_COUNT[bx]	; get # of characters to output
+	cmp	cx,2			; is it what we expect ?
+	 jne	dd_error		; no, bail out
+	push	ds
+	lds	si,es:RH4_BUFFER[bx]	; DS:SI -> buffer
+	lodsw				; get the data
+	pop	ds
+	xchg	ax,si			; save data in SI
+	mov	ah,3			; read cursor position/type
+	mov	bh,0			;  for page zero
+	int	VIDEO_INT
+	and	ch,0c0h			; make cursor start line = 0
+	mov	al,cl			; AL = bottom line of cursor
+	dec	ax			; AL = bottom line - 1
+	test	si,INSERT_ACTIVE
+	 jz	dd_outioctl10
+	shr	al,1			; Insert active is 1/2 size block
+dd_outioctl10:
+	or	ch,al			; cursor start line is now here
+	mov	ah,1			; set cursor type
+	int	VIDEO_INT
+	ret
+
+dd_inioctl:
+;----------
+;	jmp	dd_error		; input not supported
+
+dd_error:	; used for all unsupported driver functions
+;--------
+	mov	ax,RHS_ERROR+3		; "invalid command" error
+	ret
+
+
+poll_c1:
+	mov	ah,0			; eat the next character
+	int	KEYBOARD_INT		; take it out of ROS buffer
+					;    and check again
+poll_char:
+;---------
+;	exit:	ZF = 1  =>  no character ready
+;		ZF = 0  =>  AL = character
+
+	mov	al,local_char		; get the local character
+	cmp	local_flag,TRUE		; do we have local character?
+	 je	poll_c4			; no, check ROS keyboard status
+	mov	ah,1			; get keyboard status (and character)
+	int	KEYBOARD_INT		; read character from keyboard
+	 jz	input9 			; skip if no character there
+	test	ax,ax			; test if we got Ctrl-Brk
+	 jz	poll_c1			;  and eat it if we have
+poll_c3:				; we've got a character
+	cmp	ax,7200h		; is this Ctrl-PrtSc?
+	 jne	poll_c4
+	mov	al,'P'-40h		; convert to ^P character
+poll_c4:				; return the character in AL
+	or	ah,TRUE			; indicate "ready" status
+	ret
+
+char_read:
+;---------
+	cmp	local_flag,TRUE		; do we have local character?
+	 je	rdchr3			; handle that specially
+	mov	ah,0
+	int	KEYBOARD_INT		; read character from keyboard
+	test	ax,ax			; test if we got Ctrl-Brk
+	 jz	char_read		; retry in that case
+	cmp	ax,7200h		; is this Ctrl-PrtSc?
+	 jne	rdchr1			; skip if any other
+	mov	al,'P'-40h		; convert to ^P character
+	ret				;    and return it
+rdchr1:					; else it is normal or function key
+	test	al,al			; test if function key
+	 jnz	rdchr2			; skip if normal character
+	mov	local_flag,TRUE		; else return scan code as next
+	mov	local_char,ah		;    character from next INPUT
+rdchr2:					; return the character in AL
+	ret
+rdchr3:
+	mov	local_flag,FALSE	; tell them buffer is invalid
+	mov	al,local_char		; get the local charcater
+	ret				;    and return it
+
+	page
+dd_input:	; 4-input
+;--------
+	mov	cx,es:RH4_COUNT[bx]	; get # of characters to output
+	 jcxz	input9			; return if nothing to input
+	push	es			; save ES (-> request header!)
+	les	di,es:RH4_BUFFER[bx]	; get address of string to input
+input1:
+	call	char_read		; read 8-bit character
+	stosb				; store it in input buffer
+	loop	input1			; repeat for all characters
+	pop	es
+input9:
+;	sub	ax,ax
+;	ret
+
+dd_outstat:	; 10-output status (char only)
+;----------	; always ready, return no busy
+
+dd_outflush:	; 11-output flush (char only)
+;-----------	; unbuffered, perform no operation
+
+dd_open:	; 13-device open
+;-------	; no operation
+
+dd_close:	; 14-device close
+;--------	; no operation
+	sub	ax,ax
+	ret
+
+dd_poll:	; 5-nondestructive input (char only)
+;-------
+	call	poll_char		; check keyboard status
+	 jz	dd_instat20
+	mov	es:RH5_CHAR[bx],al	; return the character
+dd_poll10:
+	sub	ax,ax
+	ret
+
+dd_instat:	; 6-input status (char only)
+;---------
+	call	poll_char		; check keyboard status
+	 jnz	dd_poll10
+dd_instat20:
+	mov	ax,RHS_BUSY
+	ret
+
+
+dd_inflush:	; 7-input flush
+;---------
+	call	poll_char		; check keyboard status
+	 jz	dd_poll10 		; skip if not ready
+	call	char_read		; else read next character
+	jmps	dd_inflush		; repeat until buffer empty
+
+dd_output:	; 8-output
+;---------
+	mov	cx,es:RH4_COUNT[bx]	; get # of characters to output
+	 jcxz	output9			; return if nothing to output
+	push	es			; save ES (-> request header!)
+	les	si,es:RH4_BUFFER[bx]	; get address of string to output
+output1:
+	lods	es:byte ptr [si]	; get next character to output
+	pushf				; stack as per Int 29
+	db	09Ah			; CALLF to our fastconsole entry
+	dw	CG:FastConsole
+	dw	70h
+	loop	output1			; repeat for all characters
+	pop	es
+output9:
+	sub	ax,ax
+	ret
+
+
+driver	endp
+
+RCODE	ends				; end of device driver code
+
+page
+
+ICODE	segment	'ICODE'			; initialization code
+
+dd_init:	; 0-initialize driver
+;-------
+
+	push	es
+	sub	ax,ax
+	mov	es,ax
+	mov	ax,CG:FastConsole	; console output vector
+	mov	di,FASTCON_INT*4	; setup fast single character
+	stosw				; console output vector
+	mov	ax,ds			; (identified by DA_SPECIAL)
+	stosw
+	mov	di,CTRLBRK_INT*4	; setup Ctrl-Break ROS vector
+	mov	ax,CG:ControlBreak	;   for ^C program abort
+	stosw				;   when a character has already
+	mov	ax,ds			;   been typed into the ROS buffer
+	stosw
+	pop	es
+
+ifdef JAPAN
+
+	mov	ax,05000H		; Japanese mode (AX machine)
+	mov	bx,81			; 081 : Japanese mode select
+	int	VIDEO_INT		;
+
+	mov	ax,05000h		; Japanese mode (AX machine)
+	mov	bx,81			; 081 : Japanese mode select
+	int	KEYBOARD_INT		;
+
+endif
+
+	mov	ax,14*256 + 13		; output a carriage return
+	int	VIDEO_INT
+	mov	ax,14*256 + 10		; output a line feed
+	int	VIDEO_INT
+
+	les	bx,REQUEST[bp]		; ES:BX -> request header
+
+	mov	ax,endbios		; get last resident byte in BIOS
+	mov	es:RH0_RESIDENT[bx],ax	; set end of device driver
+	mov	es:RH0_RESIDENT+2[bx],ds
+
+	sub	ax,ax			; initialization succeeded
+    ret             
+
+ICODE	ends
+
+end

IBMBIO/COUNTRY.DEF

@@ -0,0 +1,73 @@
+;    File              : $COUNTRY.DEF$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+
+US_DATE		equ	0		; American Date Format mm/dd/yy
+EURO_DATE	equ	1		; European Date Format dd/mm/yy
+JAP_DATE	equ	2		; Japanese Date Format yy/mm/dd
+
+CLOCK_12	equ	0		; 12 Hour Clock Time Format
+CLOCK_24	equ	1		; 24 Hour Clock Time Format
+
+CI_CODE		equ	word ptr 0FFFCh		; Country Code
+CI_CODEPAGE	equ	word ptr 0FFFEh		; Code page
+CI_DATEFMT	equ	word ptr 0		; Date Format
+CI_CURRENCY	equ	byte ptr 2		; Currency Symbols
+CI_THOUSANDS	equ	byte ptr 7		; Thousands Separator
+CI_DECIMAL	equ	byte ptr 9		; Decimal Separator
+CI_DATESEP	equ	byte ptr 11		; Date Separator
+CI_TIMESEP	equ	byte ptr 13		; Time Separator
+CI_CURFMT	equ	byte ptr 15		; Currency Format
+CI_CURDIGITS	equ	byte ptr 16		; Significant Currency Digits
+CI_TIMEFMT	equ	byte ptr 17		; Time Format
+CI_CASEOFF	equ	word ptr 18		; Case Translation Offset
+CI_CASESEG	equ	word ptr 20		; Case Translation Segment
+CI_DATASEP	equ	byte ptr 22		; Data List Separator
+CI_STATICLEN	equ	24			; Static Country Data Length
+CI_LENGTH	equ	32			; Total Country Data Length
+
+EXI_ID		equ	byte ptr 0		; Information ID
+EXI_TBLOFF	equ	word ptr 1		; Table Offset
+EXI_TBLSEG	equ	word ptr 3		; Table Segment
+
+EXI_ID1		equ	byte ptr 0		; 6501 Info ID (why move it?!)
+EXI_LENGTH	equ	word ptr 1		; 6501 Table Length
+EXI_DATA_LEN	equ	3			; 6501 Country Data
+
+EXCI_CUR_COUNTRY equ	word ptr 0		; Current Country
+EXCI_CUR_CP	equ	word ptr 2		; Current Codepage
+EXCI_CI_DATAOFF	equ	4			; Start of CI_ data
+
+EXCI_STATLEN	equ	CI_STATICLEN+4			; Static Ext Country Info
+EXCI_MAXLEN	equ	EXCI_STATLEN+10+EXI_DATA_LEN	; Max Ext Country Info
+

IBMBIO/DOSHNDL.DEF

@@ -0,0 +1,123 @@
+;    File              : $DOSHNDL.DEF$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+
+
+DCNTRL_DSADD    equ dword ptr 0000h   
+DCNTRL_DSOFF    equ  word ptr 0000h   
+DCNTRL_DSSEG    equ  word ptr 0002h   
+DCNTRL_COUNT    equ  word ptr 0004h   
+DCNTRL_LEN	equ	6
+
+DHNDL_COUNT	equ	word ptr 00h		; 00 - Usage Count
+DHNDL_MODE	equ	word ptr 02h		; 02 - File Mode
+
+DHM_FCB		equ	8000h			; marks as FCB
+DHM_COMMIT	equ	4000h			; auto-commit file
+DHM_NOCRIT	equ	2000h			; no critical errors
+DHM_LOCAL	equ	10000000b		; file is not inherited
+DHM_SHAREMSK	equ	01110000b		; sharing bits
+DHM_COMPAT	equ	00000000b
+DHM_DENY_ALL	equ	00010000b		; exclusive - deny all
+DHM_DENY_WRITE	equ	00100000b
+DHM_DENY_READ	equ	00110000b
+DHM_DENY_NONE	equ	01000000b
+DHM_RWMSK	equ	00001111b		; read write bits
+DHM_RW		equ	00000010b		; file opened read/write
+DHM_WO		equ	00000001b		; file opened write only
+DHM_RO		equ	00000000b		; file opened read only
+
+;
+;	01h to 03h To be Determined
+;
+DHNDL_DATRB	equ	byte ptr 04h		; Disk attribute byte
+DHNDL_ATTR	equ	byte ptr 05h		; Attribute Byte
+DHNDL_WATTR	equ	word ptr 05h		; Attribute Word
+
+DHAT_REMOTE	equ	8000h			; set if file remote
+DHAT_TIMEOK	equ	4000h			; set if timestamp up to date
+DHAT_LOCAL	equ	1000h			; file is not inherited
+DHAT_NETPRN	equ	0800h			; device is networked printer
+DHAT_DEV	equ	0080h			; device/file bit
+DHAT_READY	equ	0040h			; ready/not ready bit
+DHAT_CLEAN	equ	0040h			; this bit CLEAR if dirty
+DHAT_BIN	equ	0020h			; raw/cooked bit
+DHAT_DRVMSK	equ	001Fh			; drive in bottom bits
+DHAT_CLK	equ	0008h			; -reserved-
+DHAT_NUL	equ	0004h			; handle is null device
+DHAT_COT	equ	0002h			; handle is console output device
+DHAT_CIN	equ	0001h			; handle is console input device
+
+DHNDL_DEVPTR	equ	dword ptr 07h		; 07 - pointer to device
+DHNDL_DEVOFF	equ	word ptr 07h		; 07 - offset of device
+DHNDL_DEVSEG	equ	word ptr 09h		; 09 - segment of device
+DHNDL_BLK1	equ	word ptr 0Bh		; 0B - first cluster in file
+DHNDL_TIME	equ	word ptr 0Dh		; 0D - file time stamp
+DHNDL_DATE	equ	word ptr 0Fh		; 0F - file date stamp
+DHNDL_SIZE	equ	dword ptr 11h		; 11 - file length
+DHNDL_SIZELO	equ	word ptr 11h
+DHNDL_SIZEHI	equ	word ptr 13h
+DHNDL_POS	equ	dword ptr 15h		; 15 - current file position
+DHNDL_POSLO	equ	word ptr 15h
+DHNDL_POSHI	equ	word ptr 17h
+DHNDL_IDX	equ	word ptr 19h		; 19 - relative cluster within file of last read
+DHNDL_DBLK	equ	word ptr 1Bh		; 1B - cluster # of dir entry
+DHNDL_DCNTHI	equ	byte ptr 1Eh		; 1E - dir offset # within cluster
+DHNDL_DCNTLO	equ	byte ptr 1Fh		; 1F - dir offset # within cluster
+DHNDL_NAME	equ	byte ptr 20h		; 20 - File/Device Name
+DHNDL_EXT	equ	byte ptr 28h		; 28 - File extension
+DHNDL_SFT	equ	dword ptr 2Bh		; 2B - pointer to previous SFT
+DHNDL_UID	equ	word ptr 2Fh		; 2F - Owning Machine ID
+DHNDL_PSP	equ	word ptr 31h		; 31 - Owning PSP
+DHNDL_SHARE	equ	word ptr 33h		; 33 - Offset of sharing record
+DHNDL_BLK	equ	word ptr 35h		; 35 - absolute cluster of last read
+						; 37 - dword reserved for IFS
+DHNDL_LEN	equ	3Bh
+
+; With DOS 3 structures _DBLK is a 16 bit
+
+
+; Logical Drive Table format
+LDT_NAME	equ	byte ptr 00h		; 00 - Ascii Name field
+LDT_FLAGS	equ	word ptr 43h		; 43 - Flag field
+LDT_PDT		equ	dword ptr 45h		; 45 - PDT for this drive
+LDT_BLK		equ	word ptr 49h		; 49 - directory sector 
+LDT_ROOT    equ word ptr 4bh        ; 4B - virtual block root 
+LDT_DRV     equ byte ptr 4dh        ; 4D - physical drive 
+LDT_ROOTLEN	equ	word ptr 4fh		; 4F - Length of root portion
+LDT_LEN		equ	58h
+
+LFLG_NETWRKD	equ	8000h
+LFLG_PHYSICAL	equ	4000h
+LFLG_JOINED	equ	2000h
+LFLG_SUBST	equ	1000h

IBMBIO/DRIVER.EQU

@@ -0,0 +1,59 @@
+;    File              : $DRIVER.EQU$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;    ENDLOG
+; Device driver header offsets.
+
+
+DH_NEXT		equ	es:dword ptr 0		; Dword Pointer to Next DEV
+DH_NEXTOFF	equ	es:word ptr 0		; Offset of next device
+DH_NEXTSEG	equ	es:word ptr 2		; Segment of next device
+DH_ATTRIB	equ	es:word ptr 4		; device attribute bits
+DH_STRATEGY	equ	es:word ptr 6		; offset of strategy entry
+DH_INTERRUPT	equ	es:word ptr 8		; offset of interupt entry
+DH_NAME		equ	es:byte ptr 10		; 8-BYTE device name
+
+DA_CHARDEV	equ	8000h		; 1=character device, 0=block device
+DA_IOCTL	equ	4000h		; device supports IOCTL string I/O
+DA_NONIBM	equ	2000h		; dosen't require FAT for login
+DA_OTILBSY	equ	2000h		; supports "output until busy"
+DA_REMOVE	equ	0800h		; supports "removable media" check
+DA_QUERY	equ	0080h		; supports query ioctl
+DA_GETSET	equ	0040h		; supports 3.2 level functionality
+DA_SPECIAL	equ	0010h		; fast console ouput via INT 29h
+DA_ISCLK	equ	0008h		; device is current clock device
+DA_ISNUL	equ	0004h		; device is NUL device (reserved)
+DA_BIGDRV	equ	0002h		; supports > 65535 sector per drive
+DA_ISCOT	equ	0002h		; device is standard output device
+DA_ISCIN	equ	0001h		; device is standard input device
+
+FASTCON_INT	equ	29h		; fast console output interrupt
+

IBMBIO/DRMACROS.EQU

@@ -0,0 +1,85 @@
+;    File              : $DRMACROS.EQU$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+;   09-Nov-88 made RETF conditional for MASM 5.1/TASM 1.0
+
+FALSE	equ	0
+TRUE	equ	(not FALSE)
+
+ifndef	@filename			;; Turbo Assembler always knows RETF
+                            ;; some versions of MASM do as well
+retf	macro				;; define far return macro for others
+	db	0cbh
+	endm
+endif
+
+jmps	macro	l
+	jmp	short l
+	endm
+
+pushx	macro	regs
+	irp	r,<regs>
+	push	r
+	endm
+	endm
+
+popx	macro	regs
+	irp	r,<regs>
+	pop	r
+	endm
+	endm
+
+incx	macro	regs
+	irp	r,<regs>
+	inc	r
+	endm
+	endm
+
+decx	macro	regs
+	irp	r,<regs>
+	dec	r
+	endm
+	endm
+
+rb	macro	count
+	db	count dup (?)
+	endm
+
+rw	macro	count
+	dw	count dup (?)
+	endm
+
+rd	macro	count
+	dd	count dup (?)
+	endm
+

IBMBIO/F52DATA.DEF

@@ -0,0 +1,88 @@
+;    File              : $F52DATA.DEF$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+;	The following equates define the Data Area whose address is
+;	returned by function 52.
+;
+
+F52_BCBBUF	equ	es:dword ptr -0008h[bx]		; current buffer
+F52_BCBOFF	equ	es:word ptr -0008h[bx]		; current buffer
+F52_BCBSEG	equ	es:word ptr -0006h[bx]		; current buffer
+F52_DMDROOT	equ	es:word ptr -0002h[bx]		; Memory Descriptor Root (Seg)
+F52_DDSCPTR	equ	es:dword ptr 0000h[bx]		; DDSC Table Address
+F52_FILEPTR	equ	es:dword ptr 0004h[bx]		; File Handle Table Address
+F52_CLKDEV	equ	es:dword ptr 0008h[bx]		; Clock Device Header
+F52_CONDEV	equ	es:dword ptr 000Ch[bx]		; Console Device Header
+F52_SECSIZE	equ	es:word ptr  0010h[bx]		; Maximum Sector Size
+F52_BUFINFOPTR	equ	es:dword ptr 0012h[bx]		; Buffer Info pointer
+F52_PATHPTR	equ	es:dword ptr 0016h[bx]		; Path Control Table Address
+F52_PATHOFF	equ	es:word ptr  0016h[bx]
+F52_PATHSEG	equ	es:word ptr  0018h[bx]
+F52_FCBPTR	equ	es:dword ptr 001Ah[bx]		; FCB Table Address
+;		equ	es:word ptr  001Eh[bx]		; #Entries in FCB Table
+F52_PHYDRV	equ	es:byte ptr  0020h[bx]		; Last Physical Drive
+F52_LASTDRV	equ	es:byte ptr  0021h[bx]		; Last Logical Drive
+F52_DEVROOT	equ	es:dword ptr 0022h[bx]		; Root Device Header
+F52_JOINDRV	equ	es:byte ptr  0034h[bx]		; Number of JOIN'd drives
+F52_SETVER	equ	es:dword ptr 0037h[bx]		; SETVER table pointer
+F52_NUM_BUF	equ	es:word ptr  003Fh[bx]		; number of disk buffers
+F52_READ_AHEAD	equ	es:word ptr  0041h[bx]		; size of read-ahead buffer
+F52_BOOTDRV	equ	es:byte ptr  0043h[bx]		; boot drive (1-26)
+F52_CPU_TYPE	equ	es:byte ptr  0044h[bx]		; 01 if >= 386SX
+F52_EXT_MEM	equ	es:word ptr  0045h[bx]		; Int 15h, AH=87h
+F52_BUF_INFO	equ	es:dword ptr 0047h[bx]		; points at Buffer Info
+F52_HMAFLAG	equ	es:byte ptr  0053h[bx]		; 1 if buffers in HMA
+F52_DEBLOCK	equ	es:word ptr  0056h[bx]		; deblock if buffers in HMA
+F52_DMD_UPPER	equ	es:word ptr  0066h[bx]		; upper memory chain
+F52_SHARE_STUB	equ	es:dword ptr 006Ah[bx]		; Share Stub Entries*15
+
+;DRDOS Specific
+
+DRDOS_CRITSTUBS	equ	es:word ptr  0000h[bx]		; Offset of end of instance data
+DRDOS_HIST1CTL	equ	es:word ptr  0004h[bx]		; History 1 Control
+DRDOS_HIST2CTL	equ	es:word ptr  0006h[bx]		; History 2 Control
+DRDOS_HISTFLG	equ	es:byte ptr  0008h[bx]		; History Buffer Flag 
+DRDOS_DUAL_LANG	equ	es:byte ptr  0009h[bx]		; Utils Dual Language Support
+DRDOS_CUR_LANG	equ	es:byte ptr  000Ah[bx]		; Current Language
+DRDOS_EXT_MEM	equ	es:word ptr  000Bh[bx]		; Total Extended Memory
+DRDOS_HIMEM_ROOT equ	es:word ptr  0010h[bx]		; High memory chain
+DRDOS_ENVSEG	equ	es:word ptr  0012h[bx]		; Seg of environment
+DRDOS_DMD_BASE	equ	es:word ptr  0016h[bx]		; base memory freed at
+DRDOS_DMD_UPPER	equ	es:word ptr  0018h[bx]		; upper memory chain
+DRDOS_MACHINE_ID equ	es:word ptr  001Ah[bx]		; local machine ID
+DRDOS_COUNTRY_FILE equ	es:word ptr  001Eh[bx]		; offset of filename
+DRDOS_HASHOFF	equ	es:word ptr  0020h[bx]		; fastopen hash root
+DRDOS_HASHSEG	equ	es:word ptr  0022h[bx]		;  pointer
+DRDOS_HASHMAX	equ	es:word ptr  0024h[bx]		; max # dir entries
+DRDOS_DEBLOCK	equ	es:word ptr  0026h[bx]		; himem deblock buffer
+DRDOS_INT2F	equ	es:word ptr  002Ch[bx]		; internal Int 2F hook

IBMBIO/FDOS.EQU

@@ -0,0 +1,220 @@
+;    File              : $FDOS.EQU$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+;		   Structure of Buffer Control Blocks
+;		   ----------------------------------
+;	These BCBs immediately preceed the data buffers. BCBs are
+;	always  shared  for all drives and therefore  must be big
+;	enough for the largest drive.
+;
+
+BCB_NEXT	equ	word ptr  00h	; link to next buffer
+BCB_PREV	equ	word ptr  02h	; link to previous buffer
+BCB_DRV		equ	byte ptr  04h	; drive of this buffer or 0FFh
+BCB_FLAGS	equ	byte ptr  05h	; buffer flags
+BCB_REC		equ	word ptr  06h	; low 16 bits of sector address
+BCB_REC2	equ	byte ptr  08h	; top 8 bits of record address
+BCB_COPIES	equ	byte ptr  0Ah	; number of copies to write
+BCB_SEPARATION	equ	word ptr  0Bh	; # sectors copies are apart
+BCB_DDSC	equ	dword ptr 0Dh	; DWORD ptr to DDSC_
+BCB_REMOTE	equ	word ptr  11h	; remote in-use count
+BCB_DATA	equ	byte ptr  14h	; buffer data
+
+BF_ISFAT	equ	0002h		; buffer marked as FAT sector
+BF_ISDIR	equ	0004h		; buffer marked as Directory sector
+BF_ISDAT	equ	0008h		; buffer marked as Data sector
+BF_DIRTY	equ	0040h		; buffer marked as modified
+BF_REMOTE	equ	0080h		; buffer is remote
+
+MAX12		equ	0FF6h		; max. disk size w/ 12-bit media
+
+;		     Structure of Hash Control Block
+;		     -------------------------------
+;	Each hash control  block refers  to the hash codes of one
+;	disrectory cluster or a root directory.
+
+HCB_LINK	equ	word ptr 0	; link to next control block
+HCB_DRV		equ	byte ptr 2	; drive for this entry or 0FFh
+HCB_CLU		equ	word ptr 4	; cluster number or 0000 if root
+HCB_CNT		equ	word ptr 6	; number of hashed entries
+HCB_DATA	equ	word ptr 8	; hash buffer data
+
+
+;		      Structure of DOS FCB
+;		      --------------------
+
+MSF_EXTFLG	equ	byte ptr 0	; if this is 0xFF, skip 1st 7 byte
+MSF_ATTRIB	equ	byte ptr 6	; file attributes if MSF_EXTFLG
+MSF_DRIVE	equ	byte ptr 0	; 1st byte normally drive code
+MSF_NAME	equ	byte ptr 1	; 8-bit ASCII file name, 11 characters
+MSF_BLOCK	equ	word ptr 12	; current block number
+MSF_RECSIZE	equ	word ptr 14	; current logical record size
+MSF_SIZE	equ	word ptr 16	; 32-bit file size
+MSF_DATE	equ	word ptr 20	; last date stamp
+MSF_TIME	equ	word ptr 22	; last time stamp
+MSF_IFN		equ	byte ptr 24	;; internal file number
+MSF_IOCTL	equ	byte ptr 25	;; file status
+MSF_BLOCK1	equ	word ptr 26	;; 1st block of file
+MSF_DBLK	equ	word ptr 28	;; directory block
+MSF_DEVPTR	equ	dword ptr 28	;; address of device driver
+MSF_DCNT	equ	word ptr 30	;; directory count
+MSF_CR		equ	byte ptr 32	; current sequential record
+MSF_RR		equ	word ptr 33	; random record address (3 or 4 byte)
+MSF_RR2		equ	byte ptr 35	; random record overflow
+
+
+;		      Structure of DOS DPB
+;		      --------------------
+
+DDSC_UNIT	equ	byte ptr 0		; absolute drive number
+DDSC_RUNIT	equ	byte ptr 1		; relative unit number
+DDSC_SECSIZE	equ	word ptr 2		; sector size in bytes
+DDSC_CLMSK	equ	byte ptr 4		; sectors/cluster - 1
+DDSC_CLSHF	equ	byte ptr 5		; log2 (sectors/cluster)
+DDSC_FATADDR	equ	word ptr 6		; sector address of FAT
+DDSC_NFATS	equ	byte ptr 8		; # of FAT copies
+DDSC_DIRENT	equ	word ptr 9		; size of root directory
+DDSC_DATADDR	equ	word ptr 11		; sector address of cluster #2
+DDSC_NCLSTRS	equ	word ptr 13		; # of clusters on disk
+DDSC_NFATRECS	equ	word ptr 15		; # of sectors per FAT
+DDSC_DIRADDR	equ	word ptr 17		; sector address of root dir
+DDSC_DEVHEAD	equ	dword ptr 19		; device driver header
+DDSC_DEVOFF	equ	word ptr 19
+DDSC_DEVSEG	equ	word ptr 21
+DDSC_MEDIA	equ	byte ptr 23		; current media byte
+DDSC_FIRST	equ	byte ptr 24		; "drive never accessed" flag
+DDSC_LINK	equ	dword ptr 25		; next drive's DDSC
+DDSC_BLOCK	equ	word ptr 29		; next block to allocate
+DDSC_FREE	equ	word ptr 31		; total free clusters on drive
+DDSC_LEN	equ	33
+
+
+
+;		DELWATCH hooks called by OS
+
+DELW_RDMASK	equ	0			; delete dir search mask
+DELW_DELETE	equ	2			; delete this dir entry
+DELW_FREECLU	equ	3			; free some clusters
+DELW_FREERD	equ	4			; free root dir entry
+DELW_SPACE	equ	5			; add "deletes" to free space
+DELW_NEWDISK	equ	7			; new disk logged in
+DELW_PURGE	equ	14			; perge pd file
+DELW_UNDEL	equ	15			; undelete pd file
+
+; 		SuperStore hook called by OS
+
+SSTOR_SPACE	equ	10h			; enquire # physical free space
+
+;		Password hooks called by OS
+
+PASSWD_CREAT	equ	20h			; initialise an entry
+PASSWD_CHMOD	equ	21h			; change an entry
+PASSWD_CHECK	equ	22h			; check an entry
+
+;	Share hooks in PCMODE data segment
+;
+; These point to a stub which does a "STC, RETF"
+;
+
+NUM_SHARE_STUB_ENTRIES	equ	15
+
+S_LOCKS		equ	DWORD*0		; share lock/unlock region
+S_UPDATE	equ	DWORD*1		; update DHNDL from share
+S_RECORD	equ	DWORD*2		; update share from DHNDL
+S_FDOSRW	equ	DWORD*3		; validate proposed operation
+S_DISCARD	equ	DWORD*4		; discard all files on drive
+S_OPEN		equ	DWORD*5		; files is opening, remember it
+S_CLOSE		equ	DWORD*6		; files is closing, forget it
+S_OM_COMPAT	equ	DWORD*7		; check open mode compatible
+S_CLOSE_IF_OPEN	equ	DWORD*8		; close if compat open, else deny
+S_DENY_IF_OPEN	equ	DWORD*9		; deny if open shared/by others
+S_GET_LIST_ENTRY equ	DWORD*10	; get open file list entry
+S_CLOSE_FILES	equ	DWORD*11	; close all files for given PSP/UID
+
+; struct dirfcb
+
+DNAME		equ	byte ptr 0	;file name & type
+DATTS       equ byte ptr 11 
+  DA_RO		equ	01h		; 0x01 - read/only
+  DA_HIDDEN	equ	02h		; 0x02 - hidden
+  DA_SYSTEM	equ	04h		; 0x04 - system
+  DA_VOLUME	equ	08h		; 0x08 - volume label
+  DA_DIR	equ	10h		; 0x10 - sub-directory
+  DA_ARCHIVE	equ	20h		; 0x20 - archive
+  DA_CLUSTER	equ	80h		; 0x80 - return starting cluster from search (API extention)
+  DA_DELWATCH	equ	80h		; 0x88 - return pending delete files
+  DA_FIXED	equ	11011000b	; can't CHMOD label, dir, unused bits
+  DA_CHANGE	equ	not DA_FIXED	; all others are changeable
+
+;DATTS2		equ	12		;CP/M attributes
+;					; 0x80 - f1' modify default open rules
+;					; 0x40 - f2' partial close default
+;					; 0x20 - f3' ignore close checksum errors
+;					; 0x10 - f4' disable checksums
+;					; 0x08 - (reserved)
+;					; 0x04 - DELETE password
+;					; 0x02 - WRITE password
+;					; 0x01 - READ password
+DUNDEL		equ	13		;1st letter of deleted file
+DPWD		equ	word ptr 14	;16-bit password hash code
+DMODTIME    	equ	word ptr 16	;delwatch time (hhhhhmmmmmmsssss)
+DMODDATE    	equ	word ptr 18	;delwatch date (yyyyyyymmmmddddd)
+;DRECSIZE	equ	16		;FlexOS record size
+;DUSER		equ	18		;FlexOS user ID of creator
+;DGROUP		equ	19		;FlexOS group ID of creator
+DPWM		equ	word ptr 20	;FlexOS access rights
+DTIME		equ	22		;time (hhhhhmmmmmmsssss)
+DDATE		equ	24		;date (yyyyyyymmmmddddd)
+DBLOCK1		equ	26		;first block in file
+DSIZE		equ	28		;current file size
+
+;		 DOS Media Password Definitions
+;		 ------------------------------
+
+PWM_OWNER	equ	000Fh			; PWD Owner mask
+PWM_GROUP	equ	00F0h			; PWD Group mask
+PWM_WORLD	equ	0F00h			; PWD World mask
+PWM_R		equ	0888h			; PWD required for reading
+PWM_W		equ	0444h			; PWD required for writing
+PWM_E		equ	0222h			; PWD req'd for executing
+PWM_D		equ	0111h			; PWD required for deleting
+PWM_ANY		equ	PWM_R+PWM_W+PWM_D	; PWD required for anything
+
+
+;	literal constants
+
+FAT12		equ	00fffh		; 12 bit fat
+FAT16		equ	0ffffh		; 16 bit fat
+
+ENDDIR		equ	0ffffh		;end of directory
+

IBMBIO/IBMROS.EQU

@@ -0,0 +1,83 @@
+;    File              : $IBMROS.EQU$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+
+VIDEO_INT	equ	10h
+EQUIPMENT_INT	equ	11h
+MEMORY_INT	equ	12h
+DISK_INT	equ	13h
+ASYNC_INT	equ	14h
+SYSTEM_INT	equ	15h
+KEYBOARD_INT	equ	16h
+PRINTER_INT	equ	17h
+RTC_INT		equ	1Ah
+CTRLBRK_INT	equ	1Bh
+
+; Int 10 subfunctions
+
+SET_CURSOR_TYPE	equ	01h
+WRITE_CURSOR	equ	02h		; Set cursor position
+READ_CURSOR	equ	03h		; Read cursor position
+SCROLL_UP	equ	06h		; Scroll active page up
+SCROLL_DOWN	equ	07h		; Scroll active page down
+READ_CHAR	equ	08h		; Read attribute/char at cur position
+WRITE_CHAR	equ	09h		; Write attribute/char at cur position
+WRITE_TTY	equ	0eh		; Write teletype at current position
+GET_STATE	equ	0fh		; Return current video mode
+
+; Int 13 subfunctions
+
+ROS_RESET	equ	00h		; reset disk system
+ROS_READ	equ	02h		; read from disk
+ROS_WRITE	equ	03h		; write to disk
+ROS_VERIFY	equ	04h		; verify data on disk
+ROS_FORMAT	equ	05h		; format track on disk
+ROS_PARAM	equ	08h		; get drive parameters
+ROS_GETTYPE	equ	15h		; get drive type
+ROS_DSKCHG	equ	16h		; check disk change status
+ROS_SETTYPE	equ	17h		; set disk type for format
+ROS_SETMEDIA	equ	18h		; set media type for format
+
+PRN_ERROR	equ	00101001b	; printer error bits
+PRN_NOTBUSY	equ	10000000b
+PRN_ACK		equ	01000000b
+PRN_PAPER	equ	00100000b
+PRN_SELECT	equ	00010000b
+PRN_IOERR	equ	00001000b
+PRN_TIMEOUT	equ	00000001b
+
+AUX_ERROR	equ	10000000b	; auxiliary error bits
+
+; Int 15 subfunctions
+
+EXT_MEMORY	equ	88h		; Return extended memory size in KB

IBMBIO/INITMSGS.ASM

@@ -0,0 +1,82 @@
+NUL	equ	0
+BS	equ	8
+TAB	equ	9
+LF	equ	10
+CR	equ	13
+
+CGROUP	group	INITDATA
+
+INITDATA	segment	word public 'INITDATA'
+	assume ds:CGROUP, cs:CGROUP
+
+;		Source .TFT file: 'TMP1.$$$'
+	public	_yes_char
+	public	yes_char
+yes_char	label	byte
+_yes_char	db	"Yy", NUL
+	public	_no_char
+	public	no_char
+no_char	label	byte
+_no_char	db	"Nn", NUL
+	public	_bad_command
+	public	bad_command
+bad_command	label	byte
+_bad_command	db	"Invalid command in CONFIG.SYS file.$", NUL
+	public	_bad_filename
+	public	bad_filename
+bad_filename	label	byte
+_bad_filename	db	"Bad or missing file $", NUL
+	public	_bad_shell
+	public	bad_shell
+bad_shell	label	byte
+_bad_shell	db	"Invalid SHELL filename $", NUL
+	public	_bad_lastdrive
+	public	bad_lastdrive
+bad_lastdrive	label	byte
+_bad_lastdrive	db	"Invalid last drive character (use A..Z) $", NUL
+	public	_bad_break
+	public	bad_break
+bad_break	label	byte
+_bad_break	db	"Invalid break switch (use ON or OFF)$", NUL
+	public	_bad_buffers
+	public	bad_buffers
+bad_buffers	label	byte
+_bad_buffers	db	"Invalid number of buffers $", NUL
+	public	_bad_files
+	public	bad_files
+bad_files	label	byte
+_bad_files	db	"Invalid number of files (use 5..255)", CR, LF, "$", NUL
+	public	_bad_fcbs
+	public	bad_fcbs
+bad_fcbs	label	byte
+_bad_fcbs	db	"Invalid number of FCBS", CR, LF, "$", NUL
+	public	_bad_fopen
+	public	bad_fopen
+bad_fopen	label	byte
+_bad_fopen	db	"Invalid number of FASTOPEN entries (use 128..32768)", CR, LF, "$", NUL
+	public	_bad_drivparm
+	public	bad_drivparm
+bad_drivparm	label	byte
+_bad_drivparm	db	"Invalid or missing DRIVPARM parameters, usage:", CR, LF, "DRIVPARM = /D:d [/C] [/F:f] [/H:h] [/N] [/S:s] [/T:t]", CR, LF, "$", NUL
+	public	_bad_history
+	public	bad_history
+bad_history	label	byte
+_bad_history	db	"Invalid HISTORY parameters, usage:", CR, LF, "HISTORY = ON|OFF [,nnn[, ON|OFF]]", CR, LF, "$", NUL
+	public	_bad_country
+	public	bad_country
+bad_country	label	byte
+_bad_country	db	"Invalid country code $", NUL
+	public	_bad_exec
+	public	bad_exec
+bad_exec	label	byte
+_bad_exec	db	"Bad or missing command interpreter.", CR, LF, "Please enter a valid filename.", CR, LF, "$", NUL
+	public	_dos_msg
+	public	dos_msg
+dos_msg	label	byte
+_dos_msg	db	CR, LF, "Can't load DOS file.$", NUL
+
+INITDATA	ends
+
+
+	end
+

IBMBIO/INITMSGS.DEF

@@ -0,0 +1,32 @@
+	extrn	_bad_break	: byte
+	extrn	bad_break	: byte
+	extrn	_bad_buffers	: byte
+	extrn	bad_buffers	: byte
+	extrn	_bad_command	: byte
+	extrn	bad_command	: byte
+	extrn	_bad_country	: byte
+	extrn	bad_country	: byte
+	extrn	_bad_drivparm	: byte
+	extrn	bad_drivparm	: byte
+	extrn	_bad_exec	: byte
+	extrn	bad_exec	: byte
+	extrn	_bad_fcbs	: byte
+	extrn	bad_fcbs	: byte
+	extrn	_bad_filename	: byte
+	extrn	bad_filename	: byte
+	extrn	_bad_files	: byte
+	extrn	bad_files	: byte
+	extrn	_bad_fopen	: byte
+	extrn	bad_fopen	: byte
+	extrn	_bad_history	: byte
+	extrn	bad_history	: byte
+	extrn	_bad_lastdrive	: byte
+	extrn	bad_lastdrive	: byte
+	extrn	_bad_shell	: byte
+	extrn	bad_shell	: byte
+	extrn	_dos_msg	: byte
+	extrn	dos_msg	: byte
+	extrn	_no_char	: byte
+	extrn	no_char	: byte
+	extrn	_yes_char	: byte
+	extrn	yes_char	: byte

IBMBIO/INITMSGS.H

@@ -0,0 +1,16 @@
+extern char near bad_break[];
+extern char near bad_buffers[];
+extern char near bad_command[];
+extern char near bad_country[];
+extern char near bad_drivparm[];
+extern char near bad_exec[];
+extern char near bad_fcbs[];
+extern char near bad_filename[];
+extern char near bad_files[];
+extern char near bad_fopen[];
+extern char near bad_history[];
+extern char near bad_lastdrive[];
+extern char near bad_shell[];
+extern char near dos_msg[];
+extern char near no_char[];
+extern char near yes_char[];

IBMBIO/MAKE.BAT

@@ -0,0 +1,119 @@
+@ECHO off
+SET TOOLS=C:\TOOLS
+
+SET MASM=%TOOLS%\MASM.EXE
+SET LINK=%TOOLS%\LINK.EXE
+SET LIBR=%TOOLS%\LIB.EXE
+
+REM 
+REM YOU SHOULD NOT HAVE TO CHANGE ANYTHING BELOW THIS LINE.
+REM 
+
+REM Define local Caldera tools
+SET LOCTOOLS=..\LTOOLS
+
+IF NOT EXIST BIN\*.* MD BIN
+
+REM Check if tools exist
+
+ECHO Checking for %MASM%
+if not exist %MASM% goto badtool
+ECHO Checking for %LINK%
+if not exist %LINK% goto badtool
+ECHO Checking for %LIBR%
+if not exist %LIBR% goto badtool
+
+
+REM *************************************
+REM Build .ASM files first, get the obj's
+REM *************************************
+
+%MASM% /t initmsgs,.\BIN\initmsgs;
+IF ERRORLEVEL 1 GOTO FAILED
+%MASM% /t biosmsgs,.\BIN\biosmsgs;
+IF ERRORLEVEL 1 GOTO FAILED
+%MASM% /t init,.\BIN\init;
+IF ERRORLEVEL 1 GOTO FAILED
+%MASM% /t clock,.\BIN\clock;
+IF ERRORLEVEL 1 GOTO FAILED
+%MASM% /t console,.\BIN\console;
+IF ERRORLEVEL 1 GOTO FAILED
+%MASM% /t disk,.\BIN\disk;
+IF ERRORLEVEL 1 GOTO FAILED
+%MASM% /t serpar,.\BIN\serpar;
+IF ERRORLEVEL 1 GOTO FAILED
+%MASM% /t biosgrps,.\BIN\biosgrps;
+IF ERRORLEVEL 1 GOTO FAILED
+%MASM% /t stacks,.\BIN\stacks;
+IF ERRORLEVEL 1 GOTO FAILED
+
+REM ******************************************
+REM Build the library so that we can link into
+REM ******************************************
+%LOCTOOLS%\rasm_sh %LOCTOOLS%\rasm86.exe . .\confstub.a86 .\BIN\confstub.obj $szpz /DDRDOS35=0 /DADDDRV=0
+IF ERRORLEVEL 1 GOTO FAILED
+%LOCTOOLS%\fixupp .\BIN\confstub.obj
+IF ERRORLEVEL 1 GOTO FAILED
+%LOCTOOLS%\rasm_sh %LOCTOOLS%\rasm86.exe . .\bdosstub.a86 .\BIN\bdosstub.obj $szpz /DDRDOS35=0 /DADDDRV=0
+IF ERRORLEVEL 1 GOTO FAILED
+%LOCTOOLS%\fixupp .\BIN\bdosstub.obj
+IF ERRORLEVEL 1 GOTO FAILED
+%LIBR% .\BIN\biosstub.LIB -+ .\BIN\bdosstub.obj -+ .\BIN\confstub.obj;
+IF ERRORLEVEL 1 GOTO FAILED
+
+REM ******************************************
+REM Build the .A86 files next, get the obj's
+REM ******************************************
+%LOCTOOLS%\rasm_sh %LOCTOOLS%\rasm86.exe . .\biosinit.a86 .\BIN\biosinit.obj $szpz /DDRDOS35=0 /DADDDRV=0
+IF ERRORLEVEL 1 GOTO FAILED
+%LOCTOOLS%\fixupp .\BIN\biosinit.obj
+IF ERRORLEVEL 1 GOTO FAILED
+%LOCTOOLS%\rasm_sh %LOCTOOLS%\rasm86.exe . .\config.a86 .\BIN\config.obj $szpz /DDRDOS35=0 /DADDDRV=0
+IF ERRORLEVEL 1 GOTO FAILED
+%LOCTOOLS%\fixupp .\BIN\config.obj
+IF ERRORLEVEL 1 GOTO FAILED
+%LOCTOOLS%\rasm_sh %LOCTOOLS%\rasm86.exe . .\bdosldr.a86 .\BIN\bdosldr.obj $szpz /DDRDOS35=0 /DADDDRV=0
+IF ERRORLEVEL 1 GOTO FAILED
+%LOCTOOLS%\fixupp .\BIN\bdosldr.obj
+IF ERRORLEVEL 1 GOTO FAILED
+%LOCTOOLS%\rasm_sh %LOCTOOLS%\rasm86.exe . .\genercfg.a86 .\BIN\genercfg.obj $szpz /DDRDOS35=0 /DADDDRV=0
+IF ERRORLEVEL 1 GOTO FAILED
+%LOCTOOLS%\fixupp .\BIN\genercfg.obj
+IF ERRORLEVEL 1 GOTO FAILED
+%LOCTOOLS%\rasm_sh %LOCTOOLS%\rasm86.exe . .\nlsfunc.a86 .\BIN\nlsfunc.obj $szpz /DDRDOS35=0 /DADDDRV=0
+IF ERRORLEVEL 1 GOTO FAILED
+%LOCTOOLS%\fixupp .\BIN\nlsfunc.obj
+IF ERRORLEVEL 1 GOTO FAILED
+
+REM ***************************************************
+REM Link the OBJ's and LIBR file to create the BIOS.EXE
+REM and then use EXE2BIN to create the IBMBIO.COM file.
+REM ***************************************************
+%LINK% @bios.lnk
+IF ERRORLEVEL 1 GOTO FAILED
+%LOCTOOLS%\exe2bin.exe .\bin\bios.exe .\bin\ibmbio.com
+IF ERRORLEVEL 1 GOTO FAILED
+del .\bin\bios.exe
+%LOCTOOLS%\compbios .\bin\ibmbio.com
+IF ERRORLEVEL 1 GOTO FAILED
+goto exit
+
+:failed
+ECHO Error in Build!
+goto exit
+
+:badtool
+ECHO Can't find that tool!
+
+:exit
+REM *********
+REM CLEANUP
+REM *********
+
+SET TOOLS=
+SET LOCTOOLS=
+SET MASM=
+SET TASM=
+SET LINK=
+SET LIBR=
+

IBMBIO/MODFUNC.DEF

@@ -0,0 +1,327 @@
+;    File              : $Workfile: MODFUNC.DEF$
+;
+;    Description       : Standard VLADIVAR include file
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+;****************************************************************;
+;*								*;
+;*	OS386 Inter-Module Function Definitions			*;
+;*								*;
+;****************************************************************;
+
+OS386_FUNC	equ	2780h			; AX value
+OS386_INT	equ	02Fh			; interrupt number
+
+	; Module definitions
+USER		equ	0
+SUP		equ	1
+RTM		equ	2
+MEM		equ	3
+DOM		equ	4
+VM		equ	5
+DPMI		equ	6
+DPMS		equ	7
+MIN_MODULE	equ	5
+MAX_MODULE	equ	15
+
+	; Internal SUP functions
+F_NotImp	equ	SUP + 0100h * 00	; Function Not Implemented
+F_Illegal	equ	SUP + 0100h * 01	; Illegal Function
+F_ModuleReg	equ	SUP + 0100h * 02	; Register Module
+F_SysDatAlloc	equ	SUP + 0100h * 03	; allocate SYSDAT memory
+F_SysDat	equ	SUP + 0100h * 04	; return SYSDAT selector
+F_MoveReal	equ	SUP + 0100h * 05	; move real mode memory to protected mode
+F_Reboot	equ	SUP + 0100h * 06
+F_Debug		equ	SUP + 0100h * 07
+F_ForeCheck	equ	SUP + 0100h * 08	; Check for foreground
+F_RegisterVxD	equ	SUP + 0100h * 09	; Register VxD with system
+F_UnloadVxD	equ	SUP + 0100h * 10	; Unload VxD hook
+F_PostInit	equ	SUP + 0100h * 11	; end of initialisation phase
+F_AllocWindow	equ	SUP + 0100h * 12	; allocate a 4K mapping window
+F_RegisterBoot	equ	SUP + 0100h * 13	; register reboot addresses
+F_EnquireBoot	equ	SUP + 0100h * 14	; enquire if reboot active
+F_GetDebugLevel	equ	SUP + 0100h * 15	; get debug level
+F_SetDebugLevel	equ	SUP + 0100h * 16	; set debug level
+F_Version	equ	SUP + 0100h * 17	; version check
+F_V86BPInstall	equ	SUP + 0100h * 18	; install v86 break point
+F_V86BPRemove	equ	SUP + 0100h * 19	; remove v86 break point
+F_V86BPOffer	equ	SUP + 0100h * 20	; offer int 3 as v86 break point
+F_LoaderCleanup	equ	SUP + 0100h * 21	; offer the chance to cleanup
+F_RegisterVxDWindow equ	SUP + 0100h * 22	; Register VxD mapping window
+F_RegisterPNW	equ	SUP + 0100h * 23	; Register PNW info
+
+	; Internal RTM functions
+F_PDCount	equ	RTM + 0100h * 01
+F_FlgWait	equ	RTM + 0100h * 02
+F_FlgSet	equ	RTM + 0100h * 03
+F_QMake		equ	RTM + 0100h * 04
+F_QOpen		equ	RTM + 0100h * 05
+F_QDelete	equ	RTM + 0100h * 06
+F_QRead		equ	RTM + 0100h * 07
+F_CQread	equ	RTM + 0100h * 08
+F_QWrite	equ	RTM + 0100h * 09
+F_CQWrite	equ	RTM + 0100h * 10
+F_Delay		equ	RTM + 0100h * 11
+F_Dispatch	equ	RTM + 0100h * 12
+F_PTerm		equ	RTM + 0100h * 13
+F_PCreat	equ	RTM + 0100h * 14
+F_SetPrior	equ	RTM + 0100h * 15
+F_PDAddr	equ	RTM + 0100h * 16
+F_PAbort	equ	RTM + 0100h * 17
+F_Sleep		equ	RTM + 0100h * 18
+F_Wakeup	equ	RTM + 0100h * 19
+F_FindPDName	equ	RTM + 0100h * 20
+F_SetFlags	equ	RTM + 0100h * 21
+F_EndOfInterrupt equ	RTM + 0100h * 22	; Register PIC end of interrupt
+F_NoAbort	equ	RTM + 0100h * 23
+F_OkAbort	equ	RTM + 0100h * 24
+F_FlagStatus	equ	RTM + 0100h * 25
+F_QRdMX		equ	RTM + 0100h * 26
+F_QWrMX		equ	RTM + 0100h * 27
+F_FlgAlloc	equ	RTM + 0100h * 28
+F_FlgFree	equ	RTM + 0100h * 29
+F_NumFlags	equ	RTM + 0100h * 30
+F_NDQRead	equ	RTM + 0100h * 31
+F_FlgWWTO	equ	RTM + 0100h * 32
+F_UdaAlloc	equ	RTM + 0100h * 33
+F_UdaFree	equ	RTM + 0100h * 34
+F_PFreeze	equ	RTM + 0100h * 35
+F_PThaw		equ	RTM + 0100h * 36
+F_CritEnter	equ	RTM + 0100h * 37
+F_CritExit	equ	RTM + 0100h * 38
+F_PCreate	equ	RTM + 0100h * 39
+F_PDList	equ	RTM + 0100h * 40
+F_PDToName	equ	RTM + 0100h * 41
+F_PDToStatus	equ	RTM + 0100h * 42
+F_PDToDomain	equ	RTM + 0100h * 43
+F_GetPrior	equ	RTM + 0100h * 44
+F_QDList	equ	RTM + 0100h * 45
+F_QDToName	equ	RTM + 0100h * 46
+F_QDToMsgLen	equ	RTM + 0100h * 47
+F_QDToMaxMsgs	equ	RTM + 0100h * 48
+F_QDToNqPD	equ	RTM + 0100h * 49
+F_QDToDqPD	equ	RTM + 0100h * 50
+F_QDToNumMsgs	equ	RTM + 0100h * 51
+F_QDToFlags	equ	RTM + 0100h * 52
+F_NameToQD	equ	RTM + 0100h * 53
+F_NameToPD	equ	RTM + 0100h * 54
+F_MutexAlloc	equ	RTM + 0100h * 55
+F_MutexFree	equ	RTM + 0100h * 56
+F_MutexEnter	equ	RTM + 0100h * 57
+F_MutexCEnter	equ	RTM + 0100h * 58
+F_MutexExit	equ	RTM + 0100h * 59
+F_Slice		equ	RTM + 0100h * 60
+F_TickLength	equ	RTM + 0100h * 61
+F_ProcessID	equ	RTM + 0100h * 62
+F_QClose	equ	RTM + 0100h * 63
+F_QDispose	equ	RTM + 0100h * 64
+F_PDToFlags	equ	RTM + 0100h * 65
+F_PDToDParam	equ	RTM + 0100h * 66
+F_ReleaseMX	equ	RTM + 0100h * 67
+F_SimulateInt	equ	RTM + 0100h * 68
+F_SetQFlags	equ	RTM + 0100h * 69
+F_TickRate	equ	RTM + 0100h * 70
+
+	; Internal MEMORY functions
+F_PdirGet	equ	MEM + 0100h * 01
+F_PdirSet	equ	MEM + 0100h * 02
+F_PageAlloc	equ	MEM + 0100h * 03
+F_RealAllocG	equ	MEM + 0100h * 04
+F_RealAllocI	equ	MEM + 0100h * 05
+F_PtblRead	equ	MEM + 0100h * 06
+F_PtblWrite	equ	MEM + 0100h * 07
+F_PageGet	equ	MEM + 0100h * 08
+F_PageSet	equ	MEM + 0100h * 09
+F_PagesAlloc	equ	MEM + 0100h * 10
+F_PageFree	equ	MEM + 0100h * 11
+F_MemAlloc	equ	MEM + 0100h * 12
+F_MemFree	equ	MEM + 0100h * 13
+F_MemSize	equ	MEM + 0100h * 14
+F_MemResize	equ	MEM + 0100h * 15
+F_DescAlloc	equ	MEM + 0100h * 16
+F_DescFree	equ	MEM + 0100h * 17
+F_DescGet	equ	MEM + 0100h * 18
+F_DescSet	equ	MEM + 0100h * 19
+F_DescMemAlloc	equ	MEM + 0100h * 20
+F_DescMemFree	equ	MEM + 0100h * 21
+F_DescMemSize	equ	MEM + 0100h * 22
+F_DescMemResize	equ	MEM + 0100h * 23
+F_PageLock	equ	MEM + 0100h * 24
+F_PageUnlock	equ	MEM + 0100h * 25
+F_PageLockAny	equ	MEM + 0100h * 26
+F_PageUnlockReuse equ	MEM + 0100h * 27
+F_PageLockNone	equ	MEM + 0100h * 28
+F_PageUnlockNone equ	MEM + 0100h * 29
+F_CallRealRaw	equ	MEM + 0100h * 30	; Call real mode (SS:ESP supplied)
+F_IntRealRaw	equ	MEM + 0100h * 31	; Do real mode interrupt (SS:ESP supplied)
+F_CallReal	equ	MEM + 0100h * 32	; Call real mode with RETF frame
+F_IntReal	equ	MEM + 0100h * 33	; Do real mode interrupt
+F_PagedCallReal	equ	MEM + 0100h * 34	; Paged real mode call
+F_PagedIntReal	equ	MEM + 0100h * 35	; Paged real mode interrupt
+F_CallIretReal	equ	MEM + 0100h * 36	; Call real mode with IRET frame
+F_CallIretRealRaw equ	MEM + 0100h * 37	; Call real mode with IRET frame (SS:ESP supplied)
+F_CallProt16	equ	MEM + 0100h * 38	; Call protected mode 16 bit code
+F_CallProt32	equ	MEM + 0100h * 39	; Call protected mode 32 bit code
+F_IAddPage	equ	MEM + 0100h * 40	; add kernel instance data
+F_BankPageLock	equ	MEM + 0100h * 41
+F_BankPageUnlock equ	MEM + 0100h * 42
+F_BankPageLockAny equ	MEM + 0100h * 43
+F_BankPageUnlockReuse equ MEM+0100h * 44
+F_BankPageLockNone equ	MEM + 0100h * 45
+F_BankPageUnlockNone equ MEM+ 0100h * 46
+F_GateAlloc	equ	MEM + 0100h * 47
+F_GateFree	equ	MEM + 0100h * 48
+F_MemTotalFree	equ	MEM + 0100h * 49
+F_AddressSpace	equ	MEM + 0100h * 50
+F_MemTotal	equ	MEM + 0100h * 51
+F_DescRead	equ	MEM + 0100h * 52
+F_DescWrite	equ	MEM + 0100h * 53
+F_GetStack	equ	MEM + 0100h * 54
+F_SetStack	equ	MEM + 0100h * 55
+
+	; Internal DOMain functions
+
+F_DAlloc	equ	DOM + 0100h * 00	; create a new domain
+F_DFree		equ	DOM + 0100h * 01	; free up a domain
+F_DGet		equ	DOM + 0100h * 02	; get current domain
+F_DSet		equ	DOM + 0100h * 03	; switch to another domain
+F_SWIntHandler	equ	DOM + 0100h * 04	; Install Software Interrupt handler
+F_PFaultHandler	equ	DOM + 0100h * 05	; Install Page Fault handler
+F_IOExHandler	equ	DOM + 0100h * 06	; Install I/O Exception handler
+F_GenExHandler	equ	DOM + 0100h * 07	; Install General Exception handler
+F_HWIntHandler	equ	DOM + 0100h * 08	; Install HW int handler
+F_IOBitGet	equ	DOM + 0100h * 09	; Get domain IO bitmap
+F_IOBitSet	equ	DOM + 0100h * 10	; Set domain IO bitmap
+F_BankIOBitGet	equ	DOM + 0100h * 11	; Get domain banked IO bitmap
+F_BankIOBitSet	equ	DOM + 0100h * 12	; Set domain banked IO bitmap
+F_BankMemGet	equ	DOM + 0100h * 13	; Read domain banked memory
+F_BankMemSet	equ	DOM + 0100h * 14	; Write domain banked memory
+F_BankPageGet	equ	DOM + 0100h * 15	; Get domain banked page table entry
+F_BankPageSet	equ	DOM + 0100h * 16	; Set domain banked page table entry
+F_RegInstData	equ	DOM + 0100h * 17	; register DOS instance data
+F_NProcesses	equ	DOM + 0100h * 18	; Get number of processes in domain
+F_DFreeze	equ	DOM + 0100h * 19	; Suspend domain
+F_DThaw		equ	DOM + 0100h * 20	; Unsuspend domain
+F_DFork		equ	DOM + 0100h * 21	; Fork domain
+F_DAbort	equ	DOM + 0100h * 22	; Abort all processes in domain
+F_UnlinkHandler equ	DOM + 0100h * 23	; Uninstall a handler
+F_HWIntDfltHandler equ	DOM + 0100h * 24	; Install HW int default handler
+F_VHWIntHandler	equ	DOM + 0100h * 25	; Install Virtual HW int handler
+F_VHWIntDfltHandler equ	DOM + 0100h * 26	; Install Virtual HW int default handler
+F_SwapInHandler	equ	DOM + 0100h * 27	; Install process swap in handler
+F_SwapOutHandler equ	DOM + 0100h * 28	; Install process swap out handler
+F_DosStartup	equ	DOM + 0100h * 29	; Statup a DOS session
+F_DosShutdown	equ	DOM + 0100h * 30	; Terminate a DOS session
+F_PCreateHandler equ	DOM + 0100h * 31	; Install process create handler
+F_PDeleteHandler equ	DOM + 0100h * 32	; Install process terminate handler
+F_RootPD	equ	DOM + 0100h * 33	; Get Domain Root Process
+F_DForeground	equ	DOM + 0100h * 34	; Domain has just switched to foreground
+F_DBackground	equ	DOM + 0100h * 35	; Domain will be switching to background
+F_MapHMA	equ	DOM + 0100h * 36	; Map Domains HMA
+F_AddInstData	equ	DOM + 0100h * 37	; add DOS instance data
+F_DMemFree	equ	DOM + 0100h * 38	; get memory available to this domain
+F_DMemTotal 	equ	DOM + 0100h * 39	; get memory allocated to this domain
+F_DGetMemLimit 	equ	DOM + 0100h * 40	; get limit on local memory allocations
+F_DSetMemLimit 	equ	DOM + 0100h * 41	; set limit on local memory allocations
+F_ReflectInt21	equ	DOM + 0100h * 42	; support for protected mode Int 21's
+F_DTestRegion	equ	DOM + 0100h * 43	; test region for global/local memory
+F_Switcher	equ	DOM + 0100h * 44	; make task switcher call
+F_HandlerCleanup equ	DOM + 0100h * 45	; debugger hook - remove all handlers for a selector
+F_DFlagGet	equ	DOM + 0100h * 46	; get Domain Flags
+F_DFlagSet	equ	DOM + 0100h * 47	; set Domain Flags
+F_DSwitchHandler equ	DOM + 0100h * 48	; Install domain switch handler
+F_GIOExHandler	equ	DOM + 0100h * 49	; Install Global I/O Exception handler
+
+;------------
+
+; VM Functions
+
+F_VMProtInit	equ	VM + 0100h * 00	; Protected Mode initialisation internal)
+
+F_LoadMT	equ	VM + 0100h * 01	; Load MultiTasking
+F_UnloadMT	equ	VM + 0100h * 02	; Unload MultiTasking
+F_ConsoleFree	equ	VM + 0100h * 03	; Save Console if enabled, then free it
+F_ConsoleGet	equ	VM + 0100h * 04	; Get Console, then restore if enabled
+F_ConsoleSaveEnable  equ VM +0100h * 05	; Enable Console save/restore
+F_ConsoleSaveDisable equ VM +0100h * 06	; Disable Console save/restore
+
+F_TMInit	equ	VM + 0100h * 07	; Task Manager Init
+F_GetKey	equ	VM + 0100h * 08	; Domain Manager to Keyboard Handler
+F_KeyScanEnable	equ	VM + 0100h * 09	; Enable hotkey scanning
+F_KeyScanDisable equ	VM + 0100h * 10	; Disable hotkey scanning
+F_ConsoleOwner	equ	VM + 0100h * 11	; Get console owner domain id
+F_DMAHandlerEnable  equ	VM + 0100h * 12 ; Re-enable DMA address translation
+F_DMAHandlerDisable equ VM + 0100h * 13	; Disable DMA address translation
+F_SetSerialTimeout  equ	VM + 0100h * 14	; Set Serial Port Timeout
+F_SetParallelTimeout equ VM+ 0100h * 15	; Set Parallel Port Timeout
+F_VCPIEntry	equ	VM + 0100h * 16	; Domain is going into VCPI mode
+F_VCPIExit	equ	VM + 0100h * 17	; Domain has probably come out of VCPI mode
+F_SetGlobalMsgMode  equ	VM + 0100h * 18	; Enter global message display mode
+F_DisplayGlobalMsg  equ	VM + 0100h * 19	; Ditto, plus display message
+F_ExitGlobalMsgMode equ	VM + 0100h * 20	; Exit global message display mode
+F_SetDomainMsgMode  equ	VM + 0100h * 21	; Enter domain message display mode
+F_DisplayDomainMsg  equ	VM + 0100h * 22	; Ditto, plus display message
+F_ExitDomainMsgMode equ	VM + 0100h * 23	; Exit domain message display mode
+F_DisplayFatalMsg   equ	VM + 0100h * 24	; Display fatal message
+F_SetSerialBase	    equ	VM + 0100h * 25	; Set Serial port base address
+F_SetParallelBase   equ	VM + 0100h * 26	; Set Parallel port base address
+F_SetSerialIRQ	    equ	VM + 0100h * 27	; Set Serial port IRQ number
+F_SetParallelIRQ    equ VM + 0100h * 28	; Set Parallel port IRQ number
+F_ResetVideo	    equ VM + 0100h * 29	; EMERGENCY reset of the video system
+F_SetMouseIRQ	    equ VM + 0100h * 30	; Set mouse IRQ
+F_CheckNotIdle      equ	VM + 0100h * 31	; Check if we are idle or not
+F_GetMouseInfo	    equ	VM + 0100h * 32
+F_GetSerialOwner    equ	VM + 0100h * 33
+F_GetSerialTimeout  equ	VM + 0100h * 34
+F_GetParallelOwner  equ	VM + 0100h * 35
+F_GetParallelTimeout equ VM+ 0100h * 36
+
+LAST_VM_FUNC	equ	36
+
+;------------
+
+; DPMI Functions
+
+; These "DPMI" functions are those that are provided by the DPMI module via the
+; Vladivar interface. True DPMI functions should be accessed via int 31h as per
+; the DPMI spec.
+
+F_InitDPMI	equ DPMI + 0100h * 0 ; used internally by DPMI. Do not call.
+F_DescAllocLDT	equ DPMI + 0100H * 1 ; allocate an LDT descriptor
+F_DescFreeLDT	equ DPMI + 0100H * 2 ; free an LDT descriptor
+F_DescGetLDT	equ DPMI + 0100H * 3 ; same as F_DescGet, but for LDT 
+F_DescSetLDT	equ DPMI + 0100H * 4 ; same as F_DescSet, but for LDT 
+F_DescAllocInt21 equ DPMI + 0100H * 5 ; allocate an LDT descriptor for pmode
+				     ;  int 21 memory allocation. 
+F_WhereIsDPMI	equ DPMI + 0100H * 6 ; return address of DPMI global data
+
+LAST_DPMI_FUNC	equ	6
+

IBMBIO/MSDOS.EQU

@@ -0,0 +1,131 @@
+;    File              : $Workfile: MSDOS.EQU$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    MSDOS.EQU 1.1 92/11/10 10:48:56
+;    Added to appslib source directory.    
+;    ENDLOG
+
+MS_P_TERMCPM	equ	00H
+MS_C_READ	equ	01H
+MS_C_WRITE	equ	02H
+MS_A_READ	equ	03H
+MS_A_WRITE	equ	04H
+MS_L_WRITE	equ	05H
+MS_C_RAWIO	equ	06H
+MS_C_RAWIN	equ	07H
+MS_C_NOECHO	equ	08H
+MS_C_WRITESTR	equ	09H
+MS_C_READSTR	equ	0aH
+MS_C_STAT	equ	0bH
+MS_C_FLUSH	equ	0cH
+MS_DRV_ALLRESET	equ	0dH
+MS_DRV_SET	equ	0eH
+MS_F_OPEN	equ	0fH
+MS_F_CLOSE	equ	10H
+MS_F_SFIRST	equ	11H
+MS_F_SNEXT	equ	12H
+MS_F_DELETE	equ	13H
+MS_F_READ	equ	14H
+MS_F_WRITE	equ	15H
+MS_F_MAKE	equ	16H
+MS_F_RENAME	equ	17H
+MS_DRV_GET	equ	19H
+MS_F_DMAOFF	equ	1aH
+MS_DRV_ALLOC	equ	1bH
+MS_DRV_ALLOCSPEC equ	1cH
+MS_F_READRAND	equ	21H
+MS_F_WRITERAND	equ	22H
+MS_F_SIZE	equ	23H
+MS_F_RANDREC	equ	24H
+MS_S_SETINT	equ	25H
+MS_P_MKPSP	equ	26H
+MS_F_READBLK	equ	27H
+MS_F_WRITEBLK	equ	28H
+MS_F_PARSE	equ	29H
+MS_T_GETDATE	equ	2aH
+MS_T_SETDATE	equ	2bH
+MS_T_GETTIME	equ	2cH
+MS_T_SETTIME	equ	2dH
+MS_F_VERIFY	equ	2eH
+MS_F_DMAGET	equ	2fH
+MS_S_BDOSVER	equ	30H
+MS_P_TERMKEEP	equ	31H
+MS_S_BREAK	equ	33H
+MS_S_GETINT	equ	35H
+MS_DRV_SPACE	equ	36H
+MS_S_COUNTRY	equ	38H
+MS_X_MKDIR	equ	39H
+MS_X_RMDIR	equ	3aH
+MS_X_CHDIR	equ	3bH
+MS_X_CREAT	equ	3cH
+MS_X_OPEN	equ	3dH
+MS_X_CLOSE	equ	3eH
+MS_X_READ	equ	3fH
+MS_X_WRITE	equ	40H
+MS_X_UNLINK	equ	41H
+MS_X_LSEEK	equ	42H
+MS_X_CHMOD	equ	43H
+MS_X_IOCTL	equ	44H
+MS_X_DUP	equ	45H
+MS_X_DUP2	equ	46H
+MS_X_CURDIR	equ	47H
+MS_M_ALLOC	equ	48H
+MS_M_FREE	equ	49H
+MS_M_SETBLOCK	equ	4aH
+MS_X_EXEC	equ	4bH
+MS_X_EXIT	equ	4cH
+MS_X_WAIT	equ	4dH
+MS_X_FIRST	equ	4eH
+MS_X_NEXT	equ	4fH
+MS_P_SETPSP	equ	50H
+MS_F_GETVERIFY	equ	54H
+MS_X_RENAME	equ	56H
+MS_X_DATETIME	equ	57H
+MS_M_STRATEGY	equ	58h
+MS_F_ERROR	equ	59H
+MS_X_MKTEMP	equ	5aH
+MS_X_MKNEW	equ	5bH
+MS_F_LOCK	equ	5cH
+MS_X_EXPAND	equ	60H
+MS_P_GETPSP	equ	62H
+MS_X_GETCP	equ	6601h
+MS_X_SETCP	equ	6602h
+MS_X_SETHC	equ	67h
+MS_X_COMMIT	equ	68h
+
+DOS_INT     equ 21h ; DOS Entry Point
+;
+STDIN		equ	0	; Standard Console Input Handle
+STDOUT		equ	1	; Standard Console Output Handle
+STDERR		equ	2	; Standard Error Output
+STDAUX		equ	3	; Auxilary Device Handle
+STDPRN		equ	4	; Printer Device Handle

IBMBIO/MSERROR.EQU

@@ -0,0 +1,121 @@
+;    File              : $MSERROR.EQU$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+
+ED_FUNCTION	equ	-01		; invalid function number
+ED_FILE		equ	-02		; file not found
+ED_PATH		equ	-03		; path not found
+ED_HANDLE	equ	-04		; too many open files
+ED_ACCESS	equ	-05		; file access denied
+ED_H_MATCH	equ	-06		; invalid handle number
+ED_DMD		equ	-07		; memory descriptor destroyed
+ED_MEMORY	equ	-08		; insufficient memory
+ED_BLOCK	equ	-09		; invalid memory block addr
+ED_ENVIRON	equ	-10		; invalid environment
+ED_FORMAT	equ	-11		; invalid format
+ED_ACC_CODE	equ	-12		; invalid access code
+ED_DATA		equ	-13		; invalid data
+ED_DRIVE	equ	-15		; invalid drive specified
+ED_DIR		equ	-16		; can't remove current dir
+ED_DEVICE	equ	-17		; not same device
+ED_ROOM		equ	-18		; no more files
+
+ED_PROTECT	equ	-19		; disk write protected
+ED_BADUNIT	equ	-20		; invalid drive specified
+ED_NOTREADY	equ	-21		; drive doesn't respond
+ED_BADCMD	equ	-22		; invalid command to driver
+ED_BADDATA	equ	-23		; data CRC error
+ED_BADRHLEN	equ	-24		; (shouldn't happen)
+ED_BADSEEK	equ	-25		; can't seek to track
+ED_BADMEDIA	equ	-26		; unrecognizable medium
+ED_RNF		equ	-27		; record/sector not found
+ED_NOPAPER	equ	-28		; printer error
+ED_WRFAIL	equ	-29		; write failed
+ED_RDFAIL	equ	-30		; read failed
+ED_GENFAIL	equ	-31		; anything failed
+ED_SHAREFAIL	equ	-32		; sharing conflict
+ED_LOCKFAIL	equ	-33		; locking conflict
+ED_DISKCHG	equ	-34		; invalid disk change
+ED_NOFCBS	equ	-35		; FCB table exhausted
+ED_NOLOCKS	equ	-36		; lock list items exhausted
+ED_NET		equ	-50		; Network Request Not Supported
+
+ED_NETACCESS	equ	-65		; file access denied
+
+ED_NETPWD	equ	-73		; Server Password Error
+ED_NETVER	equ	-74		; Incorrect Server version
+ED_NETREQ	equ	-75		; No Local Network Resources
+ED_NETTIME	equ	-76		; Network Time Out Error
+ED_NETCOMM	equ	-77		; Network Communications Error
+ED_NETSRVR	equ	-78		; No Server Network Resources 
+ED_NETLOG	equ	-79		; Server Not Logged In
+
+ED_EXISTS	equ	-80		; file already exists
+ED_MAKE		equ	-82		; Cannot Make (Files ??)
+ED_FAIL		equ	-83		; FAIL code returned from INT 24
+ED_STRUCT	equ	-84		; Out of Structures
+ED_ASSIGN	equ	-85		; Already Assigned
+ED_PASSWORD	equ	-86		; Invalid Password
+ED_PARAM	equ	-87		; Invalid Parameter
+ED_NETWRITE	equ	-88		; Network write fault
+ED_NETFUNC	equ	-89		; Function not supported on network
+ED_COMPONENT	equ	-90		; system component not installed
+ED_LASTERROR	equ	-90		; Last Error Number Used
+
+CLASS_RESOURCE	equ	1	; Out of Resource
+CLASS_TEMP	equ	2	; Temporary Situation
+CLASS_AUTHOR	equ	3	; Authorization Error
+CLASS_INTERNAL	equ	4	; Internal System Software Error
+CLASS_HARDWARE	equ	5	; Hardware Failure
+CLASS_SYSTEM	equ	6	; Serious System Failure
+CLASS_APPLIC	equ	7	; Application Program Error
+CLASS_LOST	equ	8	; File/Item Not Found
+CLASS_FORMAT	equ	9	; File/Item Illegal Format 
+CLASS_LOCKED	equ	10	; File/Item Locked
+CLASS_MEDIA	equ	11	; Media Failure
+CLASS_EXISTS	equ	12	; Item Already Exists
+CLASS_UNKNOWN	equ	13	; Unknown Classification
+
+ACT_RETRY	equ	1	; Retry a few times then prompt user
+ACT_DELAY	equ	2	; Delay then as ACT_RETRY
+ACT_USER	equ	3	; Prompt user to re-enter data
+ACT_ABORT	equ	4	; Clean Up then ABORT the process
+ACT_TERM	equ	5	; Terminate immeadiately NO CLEAN UP
+ACT_IGNORE	equ	6	; Ignore the Error
+ACT_URETRY	equ	7	; Retry the error after user intervention
+
+LOC_UNKNOWN	equ	1	; Unknown error location
+LOC_BLOCK	equ	2	; Block Device Failure
+LOC_NET		equ	3	; Network Failure
+LOC_CHAR	equ	4	; Related to Serial/Character devices
+LOC_MEMORY	equ	5	; Failure related to Memory 

IBMBIO/NLSFUNC.A86

@@ -0,0 +1,417 @@
+;    File              : $NLSFUNC.A86$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    NLSFUNC.A86 1.6 93/12/01 18:30:10 
+;    Read in full 258 bytes of collating info
+;    ENDLOG
+
+;
+; We have a problem with NLSFUNC.EXE - if this isn't loaded with an INSTALL=
+; in CONFIG.SYS then the calls to set language/codepage will fail.
+; So we provide the same functionality that NLSFUNC.EXE does here in the
+; initialisation code. "nls_hook" is called by CONFIG before the country is
+; set, then "nls_unhook" is called afterwards so we can throw away this code.
+;
+
+VALID_SIG	equ	0EDC1h	; valid signature in COUNTRY.SYS file
+
+DH_NEXT		equ	ds:dword ptr 0		; Dword Pointer to Next DEV
+DH_ATTRIB	equ	ds:word ptr 4		; device attribute bits
+DH_NAME		equ	ds:byte ptr 10		; 8-BYTE device name
+
+DA_CHARDEV	equ	8000h		; 1=character device, 0=block device
+DA_IOCTL	equ	4000h		; device supports IOCTL string I/O
+DA_GETSET	equ	0040h		; supports 3.2 level functionality
+
+	include	config.equ
+	include	i:msdos.equ
+	include	i:mserror.equ
+	
+
+CGROUP	GROUP	INITCODE
+INITCODE	CSEG	PARA 'INITCODE'
+
+; We share our NLS buffer with other temporary users
+
+	extrn	nls_temp_area:byte
+
+	Public nls_hook, nls_unhook
+
+nls_hook:
+;--------
+; On Entry:
+;	none
+; On Exit:
+;	none
+;
+	push	es
+	mov	ah,MS_S_GETINT
+	mov	al,2fh
+	int	DOS_INT			; read and save old INT 2F vector
+	mov	old_int2f_off,bx
+	mov	old_int2f_seg,es
+	mov	ah,MS_S_SETINT
+	mov	al,2fh
+	mov	dx,offset int2f_handler	; install our own INT 2F handler
+	int	DOS_INT
+	pop	es
+	ret
+
+nls_unhook:
+;----------
+; On Entry:
+;	none
+; On Exit:
+;	none
+;
+	push	ds
+	mov	dx,old_int2f_off
+	mov	ds,old_int2f_seg
+	mov	ah,MS_S_SETINT		; restore INT 2F vector
+	mov	al,2fh
+	int	DOS_INT
+	pop	ds
+	ret
+
+
+old_int2f	rd	0
+
+old_int2f_off	dw	0
+old_int2f_seg	dw	0
+
+int2f_handler:
+;-------------
+	cmp	ah,014h		; is it for us ?
+	 je	int2f_handler10
+	jmpf	old_int2f	; no, pass it on
+
+int2f_handler10:
+	cmp	al,0		; installation check ?
+	 jne	int2f_handler20
+	mov	al,0ffh		; we are already installed
+	iret
+
+int2f_handler20:
+	cmp	al,0ffh		; Codepage Prep ?
+	 jne	int2f_handler30
+	call	f66_prep
+	retf	2		; iret, keeping flags
+	
+int2f_handler30:
+	cmp	al,0feh		; Country Get Data ?
+	 jne	int2f_handler40
+	call	f65_locate_and_read
+	retf	2		; iret, keeping flags
+	
+int2f_handler40:
+	stc			; CY to indicate an error
+	mov	ax,-ED_FUNCTION	; function not supported
+	retf	2		; return an error
+
+
+f66_cp		dw	0		; INT21/66 Local Variable
+cp_packet	dw	2		; Packet Size
+cp_cpid		dw	0		; Request CodePage
+		db	0,0		; Packet Terminators
+
+preperr		dw	0		; Prepare function Error Code
+prepname	rb	9		; Reserved for ASCIIZ Device Name
+
+;
+; Area for country.sys current pointer table 
+; (these are all offsets into country.sys)
+;
+f65xx_code	dw	0	; Country code
+f65xx_cp	dw	0	; Code page
+		dw	0	; +1 reserved
+f65xx_data	dw	0	; Data area
+		dw	0	; Upper case table
+		dw	0	; +1 reserved		
+		dw	0	; Filename upper case table
+		dw	0	; Legal file characters
+		dw	0	; Collating table
+		dw	0	; Double byte character set lead byte table
+f65xx_ptable_len	equ	20
+
+f65xx_codepage	dw	0
+f65xx_country	dw	0
+f65xx_sig	dw	0	; Signature
+c_handle	dw	0
+
+
+f66_prep:
+;
+;	This function scans the complete device list and prepares
+;	all devices which support codepage.
+;
+;	On Entry	BX Requested CodePage
+;
+;	On Exit		AX Last Error Code
+;
+DA_CODEPAGE	equ	DA_CHARDEV+DA_IOCTL+DA_GETSET
+
+	push	ds
+	push	es
+	push	cs
+	pop	es
+	mov	f66_cp,bx		; Save requested CodePage
+	mov	preperr,0000		; Initialize Prepare Error
+	mov	ax,122ch		; magic hook get Device List
+	int	2fh			; after the NUL entry
+	mov	ds,bx			; BX:AX -> header after INT 2F
+	mov	bx,ax			; DS:BX -> header to be useful
+f66_p10:
+	push	ds
+	push	bx
+	mov	ax,DH_ATTRIB[bx]
+	and	ax,DA_CODEPAGE		; Check for a Character Device which
+	cmp	ax,DA_CODEPAGE		; supports IOCTL strings and GETSET
+	 jnz	f66_p40			; otherwise skip the device
+
+	lea	si,DH_NAME[bx]		; Found a matching device so
+	mov	di,offset prepname	; open the device and select the 
+	mov	cx,8			; requested codepage
+
+f66_p20:
+	lodsb
+	cmp	al,' '
+	 je	 f66_p30
+	stosb
+	loop	f66_p20
+
+f66_p30:
+	xor	al,al
+	stosb	
+	push	cs
+	pop	ds
+	mov	dx,offset prepname	; Write Access
+	mov	cl,1			; Open for write
+	mov	ax,1226h
+	int	2fh			; call magic hook
+	 jc	f66_perr
+	mov	bx,ax			; Save Device Handle in BX
+
+	mov	si,f66_cp		; Get Requested CodePage in SI
+	mov	dx,offset cp_packet	; Offset of CodePage Struct
+	mov	cx,006Ah		; Get Unknown CodePage
+	push	bp
+	mov	bp,0ch			; Generic IOCTL
+	mov	ax,122bh
+	int	2fh			; call magic hook
+	pop	bp
+	 jc	f66_p32			; Error so Select requested Code Page
+
+	cmp	si,cp_cpid
+	 je	f66_p35			; If this the currently selected
+f66_p32:				; skip the select CodePage
+	mov	cp_cpid,si
+	mov	dx,offset cp_packet	; Offset of CodePage Struct
+	mov	cx,004Ah		; Select Unkown CodePage
+	push	bp
+	mov	bp,0ch			; Generic IOCTL
+	mov	ax,122bh
+	int	2fh			; call magic hook
+	pop	bp
+	 jnc	f66_p35			; No Error so skip the error
+f66_p33:
+ 	mov	preperr,ax		; save
+
+f66_p35:	
+	mov	ax,1227h
+	int	2fh			; magic hook to close handle
+	jmp	f66_p40	
+
+f66_perr:
+	mov	preperr,ax		; Save the error code and try the
+f66_p40:				; next device in the chain
+	pop	bx			; Restore the Device offset
+	pop	ds
+	lds	bx,DH_NEXT[bx]		; check next character device for
+	cmp	bx,0FFFFh		;  Codepage support
+	 jne	f66_p10
+
+	mov	ax,preperr		; All devices have been prepared
+	pop	es
+	pop	ds
+	or	ax,ax			;  now return the last error code
+	ret				;  in AX
+
+;
+;	**********************************************************************
+;	***  Function 65 support - routines for seeking a country/codepage ***
+;	***  and loading the required information into the temp data area  ***
+;	**********************************************************************
+;
+;	**************************************************
+;	***   Open country.sys and search for the      ***
+;	***   table of offsets for the given country/  ***
+;	***   codepage, read it in and exit.           ***
+;	**************************************************
+
+f65_locate_and_read:
+;-------------------
+;	Locate and Read info CL for Country DX Codepage BX using file DS:DI
+	test	di,di			; valid filename ?
+	stc
+	 jz	f65_lr_exit
+
+	push	cx
+	call	f65x_find_info		; Will need to load up the info 
+	pop	ax
+	 jc	f65_lr_exit		; so do it if we can.
+
+	mov	dx,offset nls_temp_area
+	mov	cx,258			; read 258 bytes into local buffer
+	push	ax
+	call	f65x_load_info		; Load required info
+	pop	ax
+	 jc	f65_lr_exit
+	mov	bx,c_handle 		; Close the file first
+	mov	ax,1227h
+	int	2fh			; magic hook to close handle
+	 jc	f65_lr_exit
+	mov	si,offset nls_temp_area	; Tell subroutines where info is
+f65_lr_exit:
+	ret
+;
+; Entry:  dx=country code, bx=codepage
+; Exit :  carry set, and country.sys closed if failure
+;         country.sys open ready for more reads if success
+;
+f65x_find_info:
+	mov	f65xx_country,dx
+	mov	f65xx_codepage,bx
+	mov	dx,di
+	xor	cx,cx			; Open for read
+	mov	ax,1226h
+	int	2fh			; call magic hook
+	push	cs			; get DS pointing to this segment
+	pop	ds			;  for future reads
+	 jnc	f65x_10
+	ret				; Successful open?
+f65x_10:
+	mov	c_handle,ax		; Save handle
+	mov	dx,f65xx_country
+	cmp	f65xx_code,dx		; do we already have the information?
+	 jne	f65x_30			; No - get it from country.sys
+f65x_20:
+	cmp	f65xx_cp,bx		; Does codepage agree too?
+	 je	f65x_35			; Yes so exit with no more ado
+f65x_30:
+	mov	dx,007Eh	
+	xor	cx,cx			; Seek within country.sys
+	mov	bx,c_handle
+	push	bp
+	mov	bp,0			; seek from begining
+	mov	ax,1228h
+	int	2fh
+	pop	bp
+	 jc	f65x_err
+	mov	bx,c_handle		; check them
+	mov 	cx,2
+	mov 	dx,offset f65xx_sig
+	mov	ax,1229h
+	int	2fh			; read the signature bytes
+	 jc	f65x_err
+	cmp	f65xx_sig,VALID_SIG
+	 jne	f65x_err		; If signature bad exit
+f65x_32:
+	mov	bx,c_handle		; Read from country.sys header until
+	mov	cx,f65xx_ptable_len	; Country/codepage found or NULL
+	mov	dx,offset f65xx_code
+	mov	ax,1229h
+	int	2fh
+	 jc	f65x_err	
+	cmp	f65xx_code,0		; Found NULL so reqd combination
+	 je	f65x_err		; was not found
+	mov	dx,f65xx_code		; Get the country/codepage values
+	mov	bx,f65xx_cp		; read from Country.SYS
+	cmp	dx,f65xx_country	; Check against the requested
+	 jne	f65x_32			; Country. 
+	cmp	f65xx_codepage,0	; If a codepage match is not
+	 jz	f65x_35			; then return success
+	cmp	bx,f65xx_codepage	; Check against the requested
+	 jne	f65x_32			; Codepage
+f65x_35:
+	mov	f65xx_country,dx	; Force the Search Country and
+	mov	f65xx_codepage,bx	; CodePage to be Updated
+	ret
+
+f65x_err:
+	mov	bx,c_handle 		; and set the carry flag before
+	mov	ax,1227h
+	int	2fh			; magic hook to close handle
+	stc
+	ret
+
+;
+;	**************************************************
+;	***   Load the type of information requested   ***
+;	***   For the country currently active in the  ***
+;	***   offset table			       ***
+;	**************************************************
+;
+; Entry:  al=type of info, dx=offset of buffer to read info into cx=no of bytes
+; Exit :  carry set, and country.sys closed if failure
+;
+f65x_load_info:
+	push	es
+	push	cx
+	push	dx
+	push	ds			; Make es=ds
+	pop	es
+	dec	al			; 1=Data , 2=uppercase, 4=fuppercase
+	sub	bh,bh			; 5=filechars, 6=Collating table
+	mov	bl,al			; 7=DBCS table
+	shl	bx,1			; Retrieve relevant offset
+	mov	dx,f65xx_data[bx]	
+	xor	cx,cx			; Seek within country.sys
+	mov	bx,c_handle
+	push	bp
+	mov	bp,0			; seek from begining
+	mov	ax,1228h
+	int	2fh
+	pop	bp
+	pop	dx			; Get buffer address back
+	pop	cx			; and number of bytes to read
+	 jc	f65x_err
+	test	ax,ax			; zero offset is a problem
+	 jz	f65x_err		; (probably DBCS with old COUNTRY.SYS)
+	mov	bx,c_handle		; Now read that info into our data area
+	mov	ax,1229h
+	int	2fh
+	 jc	f65x_err
+	pop	es
+	ret
+
+
+	end

IBMBIO/PATCH.COD

@@ -0,0 +1,104 @@
+;    File              : $PATCH.COD$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+;*****************************************************
+;*
+;*	PATCH AREA  --	256 bytes long
+;*
+;*****************************************************
+
+patch:
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;00-0f
+	nop ! nop ! nop ! nop !	nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;10-1f
+	nop ! nop ! nop ! nop ! nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;20-2f
+	nop ! nop ! nop ! nop ! nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;30-3f
+	nop ! nop ! nop ! nop ! nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;40-4f
+	nop ! nop ! nop ! nop ! nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;50-5f
+	nop ! nop ! nop ! nop ! nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;60-6f
+	nop ! nop ! nop ! nop ! nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;70-7f
+	nop ! nop ! nop ! nop ! nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;80-8f
+	nop ! nop ! nop ! nop !	nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;90-9f
+	nop ! nop ! nop ! nop ! nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;a0-af
+	nop ! nop ! nop ! nop ! nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;b0-bf
+	nop ! nop ! nop ! nop ! nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;c0-cf
+	nop ! nop ! nop ! nop ! nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;d0-df
+	nop ! nop ! nop ! nop ! nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;e0-ef
+	nop ! nop ! nop ! nop ! nop ! nop
+	nop ! nop ! nop ! nop
+
+	nop ! nop ! nop ! nop ! nop ! nop  ;f0-ff
+	nop ! nop ! nop ! nop ! nop ! nop
+	nop ! nop ! nop ! nop

IBMBIO/PSP.DEF

@@ -0,0 +1,108 @@
+;    File              : $PSP.DEF$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+
+;			 Program Segment Prefix
+;			 ----------------------
+;	This structure holds vital information for DOS programs
+;
+;*******************************************************************************
+;*
+;*		+-----+-----+-----+-----+-----+-----+-----+-----+
+;*	   00	|  int 20   |  memory	| *** | jmpf|longjmp off|
+;*		+-----+-----+-----+-----+-----+-----+-----+-----+
+;*	   08	|longjmp seg| int22 Off | int22 Seg | int22 Off |
+;*		+-----+-----+-----+-----+-----+-----+-----+-----+
+;*	   10	| int22 Seg | int24 Off | int24 Seg |   Parent  |
+;*		+-----+-----+-----+-----+-----+-----+-----+-----+
+;*	   18	|		Default Handle Table		|
+;*		+-----+-----+-----+-----+-----+-----+-----+-----+
+;*	   20	|		  XFT (20 entries)		|
+;*		+-----+-----+-----+-----+-----+-----+-----+-----+
+;*	   28	|       XFT contd.	|  Environ  |  User SP	|
+;*		+-----+-----+-----+-----+-----+-----+-----+-----+
+;*	   30	|  User SS  |  xfnmax 	|  xftoff   |  xftseg   |
+;*		+-----+-----+-----+-----+-----+-----+-----+-----+
+;*	   38	|    res1   |    res2	| ric | *** | ********* |
+;*		+-----+-----+-----+-----+-----+-----+-----+-----+
+;*	   40	|  version  | ********* | ********* | ********* |
+;*		+-----+-----+-----+-----+-----+-----+-----+-----+
+;*	   48	| ********* | ********* | ********* | ********* |
+;*		+-----+-----+-----+-----+-----+-----+-----+-----+
+;*	   50	|  int 21   | retf| *** | ********* | ********* |
+;*		+-----+-----+-----+-----+-----+-----+-----+-----+
+;*	   58	| ********* | ********* |       PSP fcb 1       |
+;*		+-----+-----+-----+-----+-----+-----+-----+-----+
+
+PSP_INT20	equ	es:word ptr .0000h
+PSP_MEMORY	equ	es:word ptr .0002h
+;PSP_???	equ	es:byte ptr .0004h
+PSP_LONGCALL	equ	es:byte ptr .0005h
+PSP_LONGOFF	equ	es:word ptr .0006h
+PSP_LONGSEG	equ	es:word ptr .0008h
+PSP_TERM_IP	equ	es:word ptr .000Ah
+PSP_TERM_CS	equ	es:word ptr .000Ch
+PSP_BREAK_IP	equ	es:word ptr .000Eh
+PSP_BREAK_CS	equ	es:word ptr .0010h
+PSP_ERROR_IP	equ	es:word ptr .0012h
+PSP_ERROR_CS	equ	es:word ptr .0014h
+PSP_PARENT	equ	es:word ptr .0016h
+PSP_XFT		equ	es:byte ptr .0018h
+;
+;	The Default Handle Table is HERE !!
+;
+PSP_ENVIRON	equ	es:word ptr .002ch
+PSP_USERSP	equ	es:word ptr .002eh
+PSP_USERSS	equ	es:word ptr .0030h
+PSP_XFNMAX	equ	es:word ptr .0032h
+PSP_XFTPTR	equ	es:dword ptr .0034h
+PSP_XFTOFF	equ	es:word ptr .0034h
+PSP_XFTSEG	equ	es:word ptr .0036h
+PSP_RES1	equ	es:word ptr .0038h	; DOS Reserved 0FFFFh
+PSP_RES2	equ	es:word ptr .003Ah	; DOS Reserved 0FFFFh
+PSP_RIC		equ	es:byte ptr .003Ch	; Return Interim Character flag
+PSP_VERSION	equ	es:word ptr .0040h	; DOS version number
+
+
+PSP_DOSCALL	equ	es:word ptr .0050h
+PSP_DOSRETF	equ	es:byte ptr .0052h
+
+PSP_FCB1	equ	es:byte ptr .005Ch
+PSP_FCB2	equ	es:byte ptr .006Ch
+PSP_COMLEN	equ	es:byte ptr .0080h
+PSP_COMLINE	equ	es:byte ptr .0081h
+
+XFNMAX		equ	20
+
+PSPLEN		equ	100h
+PSPILEN		equ	60h

IBMBIO/REQHDR.EQU

@@ -0,0 +1,167 @@
+;    File              : $REQHDR.EQU$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;
+;    ENDLOG
+
+
+CMD_INIT		equ	 0	; Initialize the Device Driver
+CMD_MEDIA_CHECK		equ	 1	; Request Media Check
+CMD_BUILD_BPB		equ	 2	; Build Drive BPB
+CMD_INPUT_IOCTL		equ	 3	; IOCTL input
+CMD_INPUT		equ	 4	; Input
+CMD_INPUT_NOWAIT	equ	 5	; Non destructive input no wait
+CMD_INPUT_STATUS	equ	 6	; Input status
+CMD_INPUT_FLUSH		equ	 7	; Input flush
+CMD_OUTPUT		equ	 8	; Output
+CMD_OUTPUT_VERIFY	equ	 9	; Output with verify
+CMD_OUTPUT_STATUS	equ	10	; Output status
+CMD_OUTPUT_FLUSH	equ	11	; Output flush
+CMD_OUTPUT_IOCTL	equ	12	; IOCTL output
+CMD_DEVICE_OPEN		equ	13	; Device OPEN
+CMD_DEVICE_CLOSE	equ	14	; Device CLOSE
+CMD_FIXED_MEDIA		equ	15	; Removeable Media Check
+CMD_GENERIC_IOCTL	equ	19	; Generic IOCTL
+CMD_GET_DEVICE		equ	23	; Get the Logical Device
+CMD_SET_DEVICE		equ	24	; Set the Logical Device
+CMD_QUERY_IOCTL		equ	25	; query ioctl support
+
+;	Generic Request Header Format
+
+RH_LEN		equ	es:byte ptr 0[bx]
+RH_UNIT		equ	es:byte ptr 1[bx]
+RH_CMD		equ	es:byte ptr 2[bx]
+RH_STATUS	equ	es:word ptr 3[bx]
+  RHS_DONE	equ	0100h
+  RHS_BUSY	equ	0200h
+  RHS_IC	equ	0400h			; Interim Character
+  RHS_RM	equ	0800h
+  RHS_ERROR	equ	8000h
+
+;******
+;* No longer safe to use - some device drivers trample on them....
+;*
+;* RH_STRATEGY	equ	es:dword ptr 5[bx]	; Device Strategy Routine
+;* RH_STRATOFF	equ	es:word ptr  5[bx]	; Strategy Offset
+;* RH_STRATSEG	equ	es:word ptr  7[bx]	; Strategy Segment
+;* RH_INTERRUPT	equ	es:dword ptr 9[bx]	; Device Interrupt Routine
+;* RH_INTOFF	equ	es:word ptr  9[bx]	; Intterupt Offset
+;* RH_INTSEG	equ	es:word ptr 11[bx]	; Interrupt Segment
+;*****
+
+;	Request header for initialization
+
+RH0_NUNITS	equ	es:byte ptr 13[bx]
+RH0_RESIDENT	equ	es:word ptr 14[bx]
+RH0_BPBOFF	equ	es:word ptr 18[bx]
+RH0_BPBSEG	equ	es:word ptr 20[bx]
+RH0_DRIVE	equ	es:byte ptr 22[bx]
+RH0_LEN		equ	22
+
+;	Request header for media check
+
+RH1_MEDIA	equ	es:byte ptr 13[bx]	; BDOS: current media byte
+RH1_RETURN	equ	es:byte ptr 14[bx]	; driver: return code (00, 01, FF)
+RH1_VOLID	equ	es:dword ptr 15[bx]	; driver: volume label address
+RH1_LEN		equ	15
+
+;	Request header for "build BPB"
+
+RH2_MEDIA	equ	es:byte ptr 13[bx]	; BDOS or driver?
+RH2_BUFFER	equ	es:dword ptr 14[bx]	; BDOS: scratch buffer for driver use
+RH2_BPB		equ	es:dword ptr 18[bx]	; same as the following:
+RH2_BPBOFF	equ	es:word ptr 18[bx]	; driver: address of new BPB
+RH2_BPBSEG	equ	es:word ptr 20[bx]
+RH2_LEN		equ	24
+
+;	Request header for input/output
+
+RH4_MEDIA	equ	es:byte ptr 13[bx]	; BDOS: current media byte
+RH4_RIC		equ	es:byte ptr 13[bx]	; BDOS: Return Interim Char flg
+RH4_BUFFER	equ	es:dword ptr 14[bx]	; BDOS: disk transfer address
+RH4_BUFOFF	equ	es:word ptr 14[bx]	; BDOS: Buffer Offset
+RH4_BUFSEG	equ	es:word ptr 16[bx]	; BDOS: Buffer Segment
+RH4_COUNT	equ	es:word ptr 18[bx]	; BDOS: sector count
+RH4_SECTOR	equ	es:word ptr 20[bx]	; BDOS: starting sector
+RH4_VOLID	equ	es:dword ptr 22[bx]	; driver: volume if illegal disk change
+RH4_BIGSECTOR   equ es:dword ptr 26[bx] 
+RH4_BIGSECTORLO	equ	es:word ptr 26[bx]
+RH4_BIGSECTORHI	equ	es:word ptr 28[bx]
+
+RH4_LEN		equ	30
+
+;	Request Header for Non-Destructive Input
+
+RH5_CHAR	equ	es:byte ptr 13[bx]	; Character Read from Device
+RH5_RIC		equ	es:byte ptr 13[bx]	; BDOS: Return Interim Char flg
+RH5_LEN		equ	14
+
+;	Request Header for Device Open
+
+RH13_LEN	equ	13
+
+;	Request Header for Device Close
+
+RH14_LEN	equ	13
+
+;	Request header for generic IOCTL
+
+RH19_CATEGORY	equ	es:word ptr 13[bx]	; BDOS: major/minor function number
+RH19_MAJOR	equ	es:byte ptr 13[bx]	; BDOS: Major Function Number
+RH19_MINOR	equ	es:byte ptr 14[bx]	; BDOS: Minor Function Number
+RH19_SI		equ	es:word ptr 15[bx]	; BDOS: User SI	
+RH19_DI		equ	es:word ptr 17[bx]	; BDOS: User DI	
+RH19_GENPB	equ	es:dword ptr 19[bx]	; BDOS: extra parameters
+RH19_LEN	equ	23
+
+RQ19_SET	equ	40h		; set device parameters
+RQ19_GET	equ	60h		; get device parameters
+RQ19_WRITE	equ	41h		; write tracks
+RQ19_READ	equ	61h		; read tracks
+RQ19_FORMAT	equ	42h		; format tracks
+RQ19_VERIFY	equ	62h		; verify tracks
+
+RQ19_PRP_START	equ	4Ch		; start of codepage prepare
+RQ19_PRP_END	equ	4Dh		; end of codepage prepare
+RQ19_SELECT	equ	4Ah		; select code page
+RQ19_QRY_SEL	equ	6Ah		; query selected code page
+RQ19_QRY_PRP	equ	6Bh		; query prepared code page(s)
+RQ19_DSP_SET	equ	5Fh		; set display information
+RQ19_DSP_GET	equ	7Fh		; get display information
+
+;	Request header for get/set drive
+
+RH24_CMD	equ	es:byte ptr 14[bx]	; BDOS: Command Code
+RH24_STATUS	equ	es:word ptr 15[bx]	; BDOS: Status
+RH24_RESVD	equ	es:dword ptr 17[bx]	; BDOS: Reserved
+RH24_LEN	equ	21
+
+RH_SIZE		equ	30		; maximum size of request header

IBMBIO/REQUEST.EQU

@@ -0,0 +1,193 @@
+;    File              : $REQUEST.EQU$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;    ENDLOG
+
+
+P_DSTRUC struc
+		dw	?
+REQUEST		dd	?
+P_DMA		dd	?
+P_DSTRUC ends
+
+P_STRUC struc
+		dw	?	; saved BP
+REQUEST_OFF	dw	?	; request header offset
+REQUEST_SEG	dw	?	; request header segment
+P_DMAOFF	dw	?	; transfer offset
+P_DMASEG	dw	?	; transfer segment
+P_RETRY		db	?	; retry count for disk errors
+P_DIRECT	db	?	; 0 if DMA deblocking required
+P_ROSCMD	db	?	; 2 = read, 3 = write, 4 = verify
+P_SETTLE	db	?	; for fast settle on reads
+P_SECTOR	db	?	; sector # (0..BPB_SPT-1)
+P_HEAD		db	?	; head # (0..BPB_HEADS-1)
+P_CYL		dw	?	; cylinder # (0..1023)
+P_COUNT		dw	?	; requested sector count
+P_MCNT		dw	?	; physical sector count
+P_STRUC	ends
+
+
+
+CMD_INIT		equ	 0	; Initialize the Device Driver
+CMD_MEDIA_CHECK		equ	 1	; Request Media Check
+CMD_BUILD_BPB		equ	 2	; Build Drive BPB
+CMD_INPUT_IOCTL		equ	 3	; IOCTL input
+CMD_INPUT		equ	 4	; Input
+CMD_INPUT_NOWAIT	equ	 5	; Non destructive input no wait
+CMD_INPUT_STATUS	equ	 6	; Input status
+CMD_INPUT_FLUSH		equ	 7	; Input flush
+CMD_OUTPUT		equ	 8	; Output
+CMD_OUTPUT_VERIFY	equ	 9	; Output with verify
+CMD_OUTPUT_STATUS	equ	10	; Output status
+CMD_OUTPUT_FLUSH	equ	11	; Output flush
+CMD_OUTPUT_IOCTL	equ	12	; IOCTL output
+CMD_DEVICE_OPEN		equ	13	; Device OPEN
+CMD_DEVICE_CLOSE	equ	14	; Device CLOSE
+CMD_FIXED_MEDIA		equ	15	; Removeable Media Check
+CMD_GENERIC_IOCTL	equ	19	; Generic IOCTL
+CMD_GET_DEVICE		equ	23	; Get the Logical Device
+CMD_SET_DEVICE		equ	24	; Set the Logical Device
+CMD_QUERY_IOCTL		equ	25	; query ioctl support
+
+;	Generic Request Header Format
+
+RH_LEN		equ	byte ptr 0
+RH_UNIT		equ	byte ptr 1
+RH_CMD		equ	byte ptr 2
+RH_STATUS	equ	word ptr 3
+  RHS_DONE	equ	0100h
+  RHS_BUSY	equ	0200h
+  RHS_IC	equ	0400h			; Interim Character
+  RHS_RM	equ	0800h
+  RHS_ERROR	equ	8000h
+
+;******
+;* No longer safe to use - some device drivers trample on them....
+;*
+;* RH_STRATEGY	equ	dword ptr 5	; Device Strategy Routine
+;* RH_STRATOFF	equ	word ptr  5	; Strategy Offset
+;* RH_STRATSEG	equ	word ptr  7	; Strategy Segment
+;* RH_INTERRUPT	equ	dword ptr 9	; Device Interrupt Routine
+;* RH_INTOFF	equ	word ptr  9	; Intterupt Offset
+;* RH_INTSEG	equ	word ptr 11	; Interrupt Segment
+;*****
+
+;	Request header for initialization
+
+RH0_NUNITS	equ	byte ptr 13
+RH0_RESIDENT	equ	word ptr 14
+RH0_BPBOFF	equ	word ptr 18
+RH0_BPBSEG	equ	word ptr 20
+RH0_DRIVE	equ	byte ptr 22
+RH0_LEN		equ	22
+
+;	Request header for media check
+
+RH1_MEDIA	equ	byte ptr 13	; BDOS: current media byte
+RH1_RETURN	equ	byte ptr 14	; driver: return code (00, 01, FF)
+RH1_VOLID	equ	dword ptr 15	; driver: volume label address
+RH1_LEN		equ	15
+
+;	Request header for "build BPB"
+
+RH2_MEDIA	equ	byte ptr 13	; BDOS or driver?
+RH2_BUFFER	equ	dword ptr 14	; BDOS: scratch buffer for driver use
+RH2_BPB		equ	dword ptr 18	; same as the following:
+RH2_BPBOFF	equ	word ptr 18	; driver: address of new BPB
+RH2_BPBSEG	equ	word ptr 20
+RH2_LEN		equ	24
+
+;	Request header for input/output
+
+RH4_MEDIA	equ	byte ptr 13	; BDOS: current media byte
+RH4_RIC		equ	byte ptr 13	; BDOS: Return Interim Char flg
+RH4_BUFFER	equ	dword ptr 14	; BDOS: disk transfer address
+RH4_BUFOFF	equ	word ptr 14	; BDOS: Buffer Offset
+RH4_BUFSEG	equ	word ptr 16	; BDOS: Buffer Segment
+RH4_COUNT	equ	word ptr 18	; BDOS: sector count
+RH4_SECTOR	equ	word ptr 20	; BDOS: starting sector
+RH4_VOLID	equ	dword ptr 22	; driver: volume if illegal disk change
+RH4_BIGSECTOR   equ dword ptr 26   
+RH4_BIGSECTORLO	equ	word ptr 26
+RH4_BIGSECTORHI	equ	word ptr 28
+
+RH4_LEN		equ	30
+
+;	Request Header for Non-Destructive Input
+
+RH5_CHAR	equ	byte ptr 13	; Character Read from Device
+RH5_RIC		equ	byte ptr 13	; BDOS: Return Interim Char flg
+RH5_LEN		equ	14
+
+;	Request Header for Device Open
+
+RH13_LEN	equ	13
+
+;	Request Header for Device Close
+
+RH14_LEN	equ	13
+
+;	Request header for generic IOCTL
+
+RH19_CATEGORY	equ	word ptr 13	; BDOS: major/minor function number
+RH19_MAJOR	equ	byte ptr 13	; BDOS: Major Function Number
+RH19_MINOR	equ	byte ptr 14	; BDOS: Minor Function Number
+RH19_SI		equ	word ptr 15	; BDOS: User SI	
+RH19_DI		equ	word ptr 17	; BDOS: User DI	
+RH19_GENPB	equ	dword ptr 19	; BDOS: extra parameters
+RH19_LEN	equ	23
+
+RQ19_SET	equ	40h		; set device parameters
+RQ19_GET	equ	60h		; get device parameters
+RQ19_WRITE	equ	41h		; write tracks
+RQ19_READ	equ	61h		; read tracks
+RQ19_FORMAT	equ	42h		; format tracks
+RQ19_VERIFY	equ	62h		; verify tracks
+RQ19_SETMEDIA	equ	46h		; set media ID
+RQ19_GETMEDIA	equ	66h		; get media ID
+
+RQ19_PRP_START	equ	4Ch		; start of codepage prepare
+RQ19_PRP_END	equ	4Dh		; end of codepage prepare
+RQ19_SELECT	equ	4Ah		; select code page
+RQ19_QRY_SEL	equ	6Ah		; query selected code page
+RQ19_QRY_PRP	equ	6Bh		; query prepared code page(s)
+RQ19_DSP_SET	equ	5Fh		; set display information
+RQ19_DSP_GET	equ	7Fh		; get display information
+
+;	Request header for get/set drive
+
+RH24_CMD	equ	byte ptr 14	; BDOS: Command Code
+RH24_STATUS	equ	word ptr 15	; BDOS: Status
+RH24_RESVD	equ	dword ptr 17	; BDOS: Reserved
+RH24_LEN	equ	21
+
+RH_SIZE		equ	30		; maximum size of request header

IBMBIO/SERPAR.ASM

@@ -0,0 +1,332 @@
+;    File              : $Workfile: SERPAR.ASM$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;    SERPAR.ASM 1.7 93/07/22 19:44:27
+;    switch over to REQUEST.EQU
+;    SERPAR.ASM 1.6 93/07/19 18:57:59
+;    Add header
+;
+;    ENDLOG
+
+	include BIOSGRPS.EQU
+	include	DRMACROS.EQU		; standard DR macros
+	include	IBMROS.EQU		; ROM BIOS equates
+	include	REQUEST.EQU		; request header equates
+	include	DRIVER.EQU		; device driver equates
+
+page
+CGROUP	group	CODE, RCODE, ICODE
+
+CG	equ	offset CGROUP
+
+	Assume	CS:CGROUP, DS:CGROUP, ES:CGROUP, SS:CGROUP
+
+CODE	segment 'CODE'
+
+	extrn	endbios:word		; for device driver INIT function
+	extrn	serparFlag:byte
+	extrn	serparChar:byte
+
+CODE	ends
+
+RCODE	segment 'RCODE'
+
+	Public	SerParCommonTable
+
+SerParCommonTable:
+	db	19			; Last supported function
+	dw	CG:dd_init		; 0-initialize driver
+	dw	CG:dd_error		; 1-media change check (disks only)
+	dw	CG:dd_error		; 2-build BPB (disks only)
+	dw	CG:dd_error		; 3-IOCTL string input
+	dw	CG:dd_input		; 4-input
+	dw	CG:dd_poll		; 5-nondestructive input (char only)
+	dw	CG:dd_instat		; 6-input status (char only)
+	dw	CG:dd_inflush		; 7-input flush
+	dw	CG:dd_output		; 8-output
+	dw	CG:dd_output		; 9-output with verify
+	dw	CG:dd_outstat		; 10-output status (char only)
+	dw	CG:dd_outflush		; 11-output flush (char only)
+	dw	CG:dd_error		; 12-IOCTL string output
+	dw	CG:dd_open		; 13-device open
+	dw	CG:dd_close		; 14-device close
+	dw	CG:dd_error		; 15-removable media check (disks only)
+	dw	CG:dd_error		; 16-n/a
+	dw	CG:dd_error		; 17-n/a
+	dw	CG:dd_error		; 18-n/a
+	dw	CG:dd_genioctl		; 19-generic IOCTL
+
+
+	Assume	DS:CGROUP, ES:Nothing, SS:Nothing
+
+page
+driver	proc	near
+
+dd_error:	; used for all unsupported driver functions
+;--------
+	mov	ax,RHS_ERROR+3		; "invalid command" error
+	ret
+
+	page
+
+poll_char:
+;---------
+;	exit:	ZF = 1  =>  no character ready
+;		ZF = 0  =>  AL = character
+
+	cmp	serparFlag[si],TRUE	; do we have local character?
+	 jne	poll_c2			; skip if not
+	mov	al,serparChar[si]	; get the local charcater
+	jmps	poll_c4			;    and return it
+poll_c2:				; need to check ROS keyboard status
+	mov	ah,3			; get serial status status
+	int	ASYNC_INT		; read serial status
+	test	ah,1			; test "received data" bit
+	 jz	poll_c9			; skip if no character there
+	mov	ah,2			; read the character
+	int	ASYNC_INT		; character returned in AL
+	mov	serparChar[si],al	; save it for look ahead
+	mov	serparFlag[si],TRUE	; we've got a local character
+poll_c4:				; return the character in AL
+	or	ah,TRUE			; indicate "ready" status
+	ret
+poll_c9:
+	sub	ax,ax			; indicate "not-ready" status
+	ret				; (driver is busy)
+
+
+char_read:
+;---------
+    xor ax,ax 
+	cmp	serparFlag[si],TRUE	; do we have local character?
+	 jne	rdchr1
+	mov	serparFlag[si],FALSE	; tell them buffer is invalid
+	mov	al,serparChar[si]	; get the local character
+	ret				;    and return it
+rdchr1:
+	mov	ah,2			; read character from serial port
+	int	ASYNC_INT		; call the ROM BIOS
+	and	ah,0eh			; only worry about these error bits
+	ret				; and return the character
+
+	page
+dd_input:	; 4-input
+;--------
+	push	es			; save ES (-> request header!)
+	mov	cx,es:RH4_COUNT[bx]	; get # of characters to output
+	 jcxz	input9			; return if nothing to input
+	sub	dx,3			; convert to serial port #
+	 jb	input9			; return none read if parallel port
+	mov	si,dx			; SI = serial port index
+	les	di,es:RH4_BUFFER[bx]	; get address of string to input
+input2:
+	call	char_read		; read 8-bit character
+	test	ah,ah			; did we read OK ?
+	 jnz	input9			; if we have an error stop now
+	stosb				; store it in input buffer
+	loop	input2			; repeat for all characters
+input9:
+	pop	es
+	sub	es:RH4_COUNT[bx],cx	; update to actual number xfered
+	sub	ax,ax
+	ret
+
+dd_poll:	; 5-nondestructive input (console only)
+;-------
+	cmp	dx,3			; check if a parallel port
+	 jb	poll_busy		;  they are never ready
+	sub	dx,3
+	mov	si,dx			; SI = serial port index
+	call	poll_char		; check keyboard status
+	 jz	poll_busy
+	mov	es:RH5_CHAR[bx],al	; return the character
+	sub	ax,ax
+	ret
+poll_busy:
+	mov	ax,RHS_BUSY		; indicate no character waiting
+	ret
+
+dd_instat:	; 6-input status (char only)
+;---------
+	cmp	dx,3			; check if a parallel port
+	 jb	poll_busy		;  if so it's always busy
+	sub	dx,3
+	mov	si,dx			; SI = serial port index
+	call	poll_char		; check keyboard status
+	 jz	poll_busy
+	sub	ax,ax			; indicate "not ready" status
+	ret
+
+dd_inflush:	; 7-input flush
+;---------
+	cmp	dx,3			; check if a parallel port
+	 jae	inflsh1			; skip if serial port
+	mov	ax,RHS_ERROR+11		; return "read error" if attempting
+	ret				;  to read from the parallel port
+inflsh1:
+	sub	dx,3
+	mov	si,dx			; SI = serial port index
+inflsh2:
+	call	poll_char		; check keyboard status
+	 jz	inflsh_ret		; skip if not ready
+	call	char_read		; else read next character
+	jmps	inflsh2			; repeat until buffer empty
+inflsh_ret:				; keyboard buffer empty
+	sub	ax,ax			; return success
+	ret
+
+dd_output:	; 8-output
+;---------
+	mov	cx,es:RH4_COUNT[bx]	; get # of characters to output
+	 jcxz	output5			; return if nothing to output
+	push	es			; save ES (-> request header!)
+	les	si,es:RH4_BUFFER[bx]	; get address of string to output
+	sub	dx,3			; test if parallel port
+	 jae	output2			; skip if serial port
+	add	dx,3			; back to parallel port number
+output1:
+	lods	es:byte ptr [si]	; get next character to output
+	mov	ah,0			; output AL to parallel port
+	int	PRINTER_INT		; output to parallel port
+	mov	al,2			; "not ready" error
+	test	ah,PRN_TIMEOUT		; printer not ready?
+	 jnz	output4			;  yes, return error
+	mov	al,9			; "printer out of paper" error
+	test	ah,PRN_PAPER		; printer out paper?
+	 jnz	output4			;  yes, return error
+	inc	ax			; "write fault" error
+	test	ah,PRN_ERROR		; test if other errors
+	 jnz	output4			; skip if any errors occurred
+	loop	output1			; else repeat for all characters
+	jmps	output4			; return successfully when done
+
+output2:				; output is for serial port
+	lods	es:byte ptr [si]	; get next character to output
+	mov	ah,1			; output AL to serial port
+	int	ASYNC_INT		; output to serial port
+	mov	al,2			; "not ready" error
+	test	ah,AUX_ERROR		; test if time out etc.
+	 jnz	output4			; skip if any errors occurred
+	loop	output2			; else repeat for all characters
+output4:
+	mov	ah,RHS_ERROR shr 8	; assume an error code
+	pop	es
+	sub	es:RH4_COUNT[bx],cx	; update to actual number xfered
+	 jz	output6			; none xfered is an error
+output5:
+	sub	ax,ax			; return successfully when done
+output6:
+	ret
+
+
+
+dd_outstat:	; 10-output status (char only)
+;----------
+	cmp	dx,3			; test if parallel port
+	 jae	outstat1
+	mov	ah,2			; read parallel port status
+	int	PRINTER_INT		; call the ROM BIOS
+	test	ah,80h			; test "not busy" bit
+	 jnz	outstat_ready		; if not busy then ready for output
+	jmps	outstat_busy		;    else we must be still busy
+outstat1:
+	sub	dx,3
+	mov	ah,3			; get status for serial port
+	int	ASYNC_INT
+	test	ah,20h			; transmit buffer register emmpty?
+	 jz	outstat_busy
+	test	al,20h			; data set ready?
+	 jz	outstat_busy
+outstat_ready:
+	sub	ax,ax			; always ready, return no busy
+	ret
+outstat_busy:
+	mov	ax,RHS_BUSY
+	ret
+
+dd_outflush:	; 11-output flush (char only)
+;-----------
+	sub	ax,ax			; unbuffered, perform no operation
+	ret
+
+
+	page
+dd_open:	; 13-device open
+;-------
+	sub	ax,ax			; no operation
+	ret
+
+
+dd_close:	; 14-device close
+;--------
+	sub	ax,ax			; no operation
+	ret
+
+
+	page
+dd_genioctl:	; 19-generic IOCTL
+;-----------
+    sub ax,ax           
+	ret
+
+driver	endp
+
+RCODE	ends				; end of device driver code
+
+page
+
+ICODE	segment 'ICODE'			; initialization code
+
+dd_init:	; 0-initialize driver
+;-------
+	cmp	dx,3			; check if serial or parallel
+	 jae	init1			; skip if serial port setup
+	mov	ah,1			; initialize parallel port
+	int	PRINTER_INT		; call the ROM BIOS
+	jmps	init2
+init1:
+	sub	dx,3
+	mov	ah,0			; initialize serial port
+	mov	al,0A3h			; 2400 Bd, no parity, 8 data, 1 stop
+	int	ASYNC_INT		; call the ROM BIOS
+init2:
+	les	bx,REQUEST[bp]		; ES:BX -> request header
+
+	mov	ax,endbios
+	mov	es:RH0_RESIDENT[bx],ax	; set end of device driver
+	mov	es:RH0_RESIDENT+2[bx],ds
+
+	sub	ax,ax			; initialization succeeded
+	ret				; (BIOS init always does...)
+
+ICODE	ends
+
+	end

IBMBIO/STACKS.ASM

@@ -0,0 +1,365 @@
+;    File              : $STACKS.ASM$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;    STACKS.ASM 1.6 93/10/26 19:08:13
+;    Fix bug when we run out of stacks
+;    STACKS.ASM 1.4 93/09/02 22:36:47
+;    Add header to system allocations
+;    ENDLOG
+
+CGROUP	group	INITCODE, STACKS
+
+STACKS		segment	public para 'STACKS'
+
+	Assume	CS:STACKS, DS:Nothing, ES:Nothing, SS:Nothing
+
+StackCode:
+
+;************
+; FIXED DATA
+;************
+
+        dw  0       
+NumOfStacks	dw	0		; we have this many stacks
+StackCB		dw	0		; NumOfStacks*8 = size of control array
+StackSize       dw	0		; size of an individual stack
+StackPtr	label dword		; pointer to stack data		
+StackOff	dw	offset STACKS:StackHeap
+StackSeg	dw	0
+FirstStack	dw	offset STACKS:StackHeap
+LastStack	dw	offset STACKS:StackHeap-STACK_CB_SIZE
+NextStack	dw	offset STACKS:StackHeap-STACK_CB_SIZE
+
+;************
+; FIXED DATA
+;************
+
+STACK_CB_FLAGS	equ	word ptr 0	; stack flags
+STACK_CB_SP	equ	word ptr 2	; old stack saved here
+STACK_CB_SS	equ	word ptr 4
+STACK_CB_TOP	equ	word ptr 6	; stack top lives here
+STACK_CB_SIZE	equ	8
+
+STACK_FREE	equ	0		; stack is available to allocate
+STACK_INUSE	equ	1		; stack is in use
+STACK_OVERFLOW	equ	2		; stack has overflowed
+
+;
+; Our hardware interrupt handlers which are of the form
+;
+;	call	SwapStack
+;	db	0EAh			; JMPF opcode
+;	dd	oldIntHandler
+;
+; By looking at the near return address we can find the address of the old
+; interrupt handler.
+; We try to allocate a stack from our pool of stacks, working downward to
+; reduce the problems of stack overflow.
+;
+; We check the top of the stack contains a pointer to our control block and
+; if this is invalid we assume the stack has overflowed, and try the next one.
+; We have no way of recovering a stack that has overflowed (eg. by zapping
+; everything below us on exit).
+;
+; If we run out of stacks we just continue on the callers stack, rather than
+; halting the system.
+;
+
+Int02:
+	call	SwapStack
+	db	0EAh		; JMPF
+i02Off	dw	4*02h,0
+
+Int08:
+	call	SwapStack
+	db	0EAh		; JMPF
+i08Off	dw	4*08h,0
+
+Int09:
+	call	SwapStack
+	db	0EAh
+i09Off	dw	4*09h,0
+
+Int0A:
+	call	SwapStack
+	db	0EAh		; JMPF
+i0AOff	dw	4*0Ah,0
+
+Int0B:
+	call	SwapStack
+	db	0EAh		; JMPF
+i0BOff	dw	4*0Bh,0
+
+Int0C:
+	call	SwapStack
+	db	0EAh		; JMPF
+i0COff	dw	4*0Ch,0
+
+Int0D:
+	call	SwapStack
+	db	0EAh		; JMPF
+i0DOff	dw	4*0Dh,0
+
+Int0E:
+	call	SwapStack
+	db	0EAh		; JMPF
+i0EOff	dw	4*0Eh,0
+
+Int70:
+	call	SwapStack
+	db	0EAh		; JMPF
+i70Off	dw	4*70h,0
+
+Int72:
+	call	SwapStack
+	db	0EAh		; JMPF
+i72Off	dw	4*72h,0
+
+Int73:
+	call	SwapStack
+	db	0EAh		; JMPF
+i73Off	dw	4*73h,0
+
+Int74:
+	call	SwapStack
+	db	0EAh		; JMPF
+i74Off	dw	4*74h,0
+
+Int76:
+	call	SwapStack
+	db	0EAh		; JMPF
+i76Off	dw	4*76h,0
+
+Int77:
+	call	SwapStack
+	db	0EAh		; JMPF
+i77Off	dw	4*77h,0
+
+SwapStack proc near
+; On Entry:
+;	As per INT except word on stack from near call, which gives old vector
+; On Exit:
+;	None
+;
+	cli				; just in case
+	push	bp
+	push	si			; save work registers
+	mov	si,cs:NextStack		; start looking here for a stack
+SwapStack10:
+	cmp	cs:STACK_CB_FLAGS[si],STACK_FREE
+	 jne	SwapStack20		; use this stack if possible
+	mov	bp,cs:STACK_CB_TOP[si]	; get the top of this stack
+	cmp	si,cs:word ptr [bp]	; does the check match ?
+	 jne	SwapStack20		; no, try the next one
+	mov	cs:NextStack,si		; remember where we are
+	mov	cs:STACK_CB_FLAGS[si],STACK_INUSE
+	mov	cs:STACK_CB_SS[si],ss	; save old stack
+	mov	cs:STACK_CB_SP[si],sp
+
+	mov	bp,sp
+	xchg	bx,ss:word ptr 4[bp]	; BX = return address, BX saved
+
+	mov	bp,cs
+	mov	ss,bp
+	mov	sp,cs:STACK_CB_TOP[si]	; switch stacks
+	pushf
+	call	cs:dword ptr 1[bx]	; fake an INT to old handler
+	mov	ss,cs:STACK_CB_SS[si]
+	mov	sp,cs:STACK_CB_SP[si]	; swap back to the original stack
+	mov	cs:STACK_CB_FLAGS[si],STACK_FREE
+	mov	cs:NextStack,si		; update in case we were nested
+	pop	si			; restore registers
+	pop	bp
+	pop	bx			; (was return address, now saved BX)
+	iret				; exit interrupt handler
+
+SwapStack20:
+	sub	si,STACK_CB_SIZE	; it's not, so try the next
+	cmp	si,cs:FirstStack	;  if there is one
+	 jae	SwapStack10
+	pop	si			; restore registers
+	pop	bp
+	ret				; back to JMPF as we can't swap stacks
+
+SwapStack endp
+
+i19Table dw	4*02H, offset STACKS:i02Off
+	dw	4*08H, offset STACKS:i08Off
+	dw	4*09H, offset STACKS:i09Off
+	dw	4*0AH, offset STACKS:i0AOff
+	dw	4*0BH, offset STACKS:i0BOff
+	dw	4*0CH, offset STACKS:i0COff
+	dw	4*0DH, offset STACKS:i0DOff
+	dw	4*0EH, offset STACKS:i0EOff
+	dw	4*70H, offset STACKS:i70Off
+	dw	4*72H, offset STACKS:i72Off
+	dw	4*73H, offset STACKS:i73Off
+	dw	4*74H, offset STACKS:i74Off
+	dw	4*76H, offset STACKS:i76Off
+	dw	4*77H, offset STACKS:i77Off
+	dw	0
+
+Int19:
+; Trap the Int 19 reboot and restore any hardware vectors we have hooked
+	cli
+	cld
+	xor	ax,ax
+	mov	es,ax		; ES = interrupt vectors
+	push	cs
+	pop	ds
+	lea	si,i19Table	; DS:SI -> table to restore
+Int1910:
+	lodsw
+	xchg	ax,di		; ES:DI -> address to restore to
+	lodsw
+	xchg	ax,si		; CS:SI -> value to restore
+	movsw
+	movsw
+	xchg	ax,si		; restore position in table
+	cmp	ds:word ptr [si],0
+	 jne	Int1910
+	db	0EAh		; JMPF
+i19Off	dw	4*19h,0
+
+	even				; word align our stacks
+
+StackHeap label	word			; dynamically build stack CB's here
+
+RELOCATE_SIZE	equ	($ - StackCode)
+
+STACKS		ends
+
+INITCODE	segment public para 'INITCODE'
+
+	Assume	CS:CGROUP, DS:CGROUP, ES:Nothing, SS:Nothing
+
+	extrn	alloc_hiseg:near
+
+	Public	InitStacks
+;==========
+InitStacks:
+;==========
+; On Entry:
+;	CX = number of stacks
+;	DX = size of stack
+;	Values are checked
+; On Exit:
+;	None
+;
+	push	ds
+	push	es
+	inc	dx			; let's ensure stacks are WORD
+	and	dx,0FFFEh		;  aligned...
+	mov	NumOfStacks,cx
+	mov	StackSize,dx
+	mov	ax,STACK_CB_SIZE
+	mul	cx			; AX = bytes in control area
+	mov	StackCB,ax
+	add	LastStack,ax
+	add	NextStack,ax
+	add	StackOff,ax		; adjust our pointers
+	xchg	ax,cx			; AX = NumOfStacks
+	mul	StackSize		; AX bytes are required for stacks
+	add	ax,StackOff		; add to start of stacks
+	push	ax			; save length in bytes
+	add	ax,15			; allow for rounding
+	mov	cl,4
+	shr	ax,cl			; convert it to para's
+	mov	dl,'S'			; allocation signature is Stacks
+	call	alloc_hiseg		; allocate some memory
+	pop	cx			; CX = length in bytes
+	mov	StackSeg,ax		; remember where
+	mov	es,ax
+			Assume ES:STACKS
+	xor	di,di
+	mov	al,0CCh			; fill stacks with CC for debug
+	rep	stosb
+	xor	di,di
+	mov	si,offset CGROUP:StackCode
+	mov	cx,RELOCATE_SIZE
+	rep	movsb			; relocate the code
+
+	mov	bx,FirstStack		; lets start building the CB's
+	mov	cx,NumOfStacks
+	lds	si,StackPtr		; SI = bottom of stack area
+			Assume DS:STACKS
+	sub	si,WORD			; we want the word below top of stack
+InitStacks10:
+	add	si,StackSize		; SI = top of stack
+	mov	ds:STACK_CB_FLAGS[bx],STACK_FREE
+	mov	ds:STACK_CB_TOP[bx],si	; set top of stack
+	mov	ds:word ptr [si],bx	; set backlink
+	add	bx,STACK_CB_SIZE	; onto next control block
+	loop	InitStacks10
+			
+	xor	ax,ax
+	mov	ds,ax
+			Assume DS:Nothing
+	cli
+	mov	si,offset CGROUP:iTable	; now we fixup the vectors
+InitStacks20:
+	mov	ax,cs:word ptr 0[si]	; ES:AX = entry point
+	mov	di,cs:word ptr 2[si]	; ES:DI = fixup location
+	mov	bx,es:word ptr [di]	; get the vector to fixup
+	xchg	ax,ds:word ptr [bx]	; set entry offset while saving
+	stosw				;  previous handler offset
+	mov	ax,es
+	xchg	ax,ds:word ptr 2[bx]	; now the segment
+	stosw
+	add	si,2*WORD		; onto next entry
+	cmp	cs:word ptr 0[si],0	; (zero terminated)
+	 jnz	InitStacks20
+	sti
+InitStacks30:
+	pop	es
+	pop	ds
+	ret
+
+iTable	dw	offset STACKS:Int02, offset STACKS:i02Off
+	dw	offset STACKS:Int08, offset STACKS:i08Off
+	dw	offset STACKS:Int09, offset STACKS:i09Off
+	dw	offset STACKS:Int0A, offset STACKS:i0AOff
+	dw	offset STACKS:Int0B, offset STACKS:i0BOff
+	dw	offset STACKS:Int0C, offset STACKS:i0COff
+	dw	offset STACKS:Int0D, offset STACKS:i0DOff
+	dw	offset STACKS:Int0E, offset STACKS:i0EOff
+	dw	offset STACKS:Int70, offset STACKS:i70Off
+	dw	offset STACKS:Int72, offset STACKS:i72Off
+	dw	offset STACKS:Int73, offset STACKS:i73Off
+	dw	offset STACKS:Int74, offset STACKS:i74Off
+	dw	offset STACKS:Int76, offset STACKS:i76Off
+	dw	offset STACKS:Int77, offset STACKS:i77Off
+	dw	offset STACKS:Int19, offset STACKS:i19Off
+	dw	0
+
+INITCODE	ends
+
+	end

IBMBIO/UDSC.EQU

@@ -0,0 +1,64 @@
+;    File              : $UDSC.EQU$
+;
+;    Description       :
+;
+;    Original Author   : DIGITAL RESEARCH
+;
+;    Last Edited By    : $CALDERA$
+;
+;-----------------------------------------------------------------------;
+;    Copyright Work of Caldera, Inc. All Rights Reserved.
+;      
+;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
+;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
+;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
+;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
+;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
+;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
+;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
+;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
+;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
+;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
+;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
+;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
+;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
+;    CIVIL LIABILITY.
+;-----------------------------------------------------------------------;
+;
+;    *** Current Edit History ***
+;    *** End of Current Edit History ***
+;
+;    $Log$
+;    ENDLOG
+
+
+UDSC_BPB_LENGTH	equ	25
+
+UDSC		struc
+UDSC_NEXT	dd	?		; link to next UDSC_
+UDSC_RUNIT	db	?		; ROS drive number (0/1/80/81)
+UDSC_DRIVE	db	?		; logical drive
+UDSC_BPB	db	UDSC_BPB_LENGTH dup (?)	; current BPB
+UDSC_FATFLAG	db	?
+UDSC_OPNCNT	dw	?		; # of files open on drive
+UDSC_TYPE	db	?		; floppy drive type (0/1/2/7)
+UDSC_FLAGS	dw	?		; various flags for drive
+UDSC_NCYL	dw	?		; # of cylinders per drive
+UDSC_DEVBPB	db	UDSC_BPB_LENGTH dup (?)	; device BPB
+		db	7 dup (?)
+UDSC_TIMER	dw	2 dup (?)	; tick count for MEDCHK
+UDSC_LABEL	db	12 dup (?)	; ASCIIZ volume label
+UDSC_SERIAL	dd	?		; serial number
+UDSC_FSTYPE	db	9 dup (?)	; ASCIIZ "FAT12"/"FAT16" type
+UDSC		ends
+
+UDSC_LENGTH	equ	size UDSC
+
+UDF_HARD	equ	0001h		; drive is a hard disk
+UDF_CHGLINE	equ	0002h		; drive support disk change line
+UDF_UNSURE	equ	0004h		; drive has just been formatted
+UDF_VFLOPPY	equ	0010h		; drive shares physical drive
+UDF_OWNER	equ	0020h		; logical drive "owns" physical drive
+UDF_MEDIA	equ	0100h		; media id is from bootsec, not default
+
+MAXPART		equ	26		; support up 26 drives