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105 lines
1.9 KiB
Plaintext
105 lines
1.9 KiB
Plaintext
;
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; Concurrent CP/M-86 v2.0 with BDOS version 3.1
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; Interface for PLM-86 with separate code and data
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; Code org'd at 0
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; Created:
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; October 5, 1981 by Danny Horovitz
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; Revised:
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; 28 Mar 83 by Bill Fitler
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name scd
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dgroup group dats,stack
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cgroup group code
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assume cs:cgroup, ds:dgroup, ss:dgroup
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stack segment word stack 'STACK'
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stack_base label byte
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stack ends
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dats segment para public 'DATA' ;CP/M page 0 - LOC86'd at 0H
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org 4
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bdisk db ?
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org 6
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maxb dw ?
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org 50h
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cmdrv db ?
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pass0 dw ?
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len0 db ?
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pass1 dw ?
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len1 db ?
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org 5ch
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fcb db 16 dup (?)
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fcb16 db 16 dup (?)
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cr db ?
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rr dw ?
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ro db ?
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buff db 128 dup (?)
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tbuff equ buff
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buffa equ buff
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fcba equ fcb
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org 100h ;past CPM data space
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saveax dw 0 ;save registers for mon functions
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savebx dw 0
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savecx dw 0
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savedx dw 0
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public bdisk,maxb,cmdrv,pass0,len0
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public pass1,len1,fcb,fcb16,cr,rr
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public ro,buff,tbuff,buffa,fcba
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public saveax,savebx,savecx,savedx
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dats ends
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code segment public 'CODE'
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public xdos,mon1,mon2,mon3,mon4
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extrn plmstart:near
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org 0h ; for separate code and data
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jmp pastserial ; skip copyright
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jmp patch ; store address of patch routine at start
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db 'COPYRIGHT (C) 1983, DIGITAL RESEARCH '
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db ' CONCURRENT CP/M-86 2.0, 03/31/83 ' ; db ' MP/M-86 2.0, 10/5/81 '
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pastserial:
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pushf
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pop ax
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cli
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mov cx,ds
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mov ss,cx
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lea sp,stack_base
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push ax
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popf
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jmp plmstart
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xdos proc
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push bp
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mov bp,sp
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mov dx,[bp+4]
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mov cx,[bp+6]
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int 224
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mov saveax,ax
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mov savebx,bx
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mov savecx,cx
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mov savedx,dx
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pop bp
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ret 4
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xdos endp
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mon1 equ xdos ; no returned value
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mon2 equ xdos ; returns byte in AL
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mon3 equ xdos ; returns address or word BX
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mon4 equ xdos ; returns pointer in BX and ES
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patch:
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nop
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nop
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nop
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nop
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org 0100h ; leave room for patch area
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code ends
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end
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