Concurrent CP/M-86 version 2.0 Patch Information Documentation

This document includes all changes to the archived distribution,
as well as those patches made optionally in the field.

Last modified:    14 April 83    whf


-------------------------------------------------------------------
Patch #1: GENCCPM and SYSTAT screen handling patches (optional).
Distribution method: Documented in release notes 4/83.
Patch by: Bill Fitler, 4/8/83.




-------------------------------------------------------------------
Patch #2: BDOS Record locking with multi-sector.
Distribution method: Master distribution diskette #2 patched 4/13/83
Patch by: Ray Pedrizetti, 4/11/83.


Module:		BDOS.CON			04/13/83
-------

Error Description:
------------------
	The BDOS error code 8 (Record locked by another process) may
occur when the requested records are not locked by another process.
This error may occur for following condition, reading or writing to a
file that has been opened in the unlocked mode, with a multi sector
count greater than 1 and when another process has records locked outside
of the requested range.

Patch Procedure:
----------------

	A>sid86
	12:45:46 A:SID86.CMD
	SID86 1.01   1/4/83 
	#rbdos.con
	  START      END
	580A:0000 580A:3B7F
	#xcs
	CS 0000 580a+8
	DS 0000 .
	#l2064
	  5812:2064 CALL   1FDA
	  5812:2067 CMP    AL,FF
	  5812:2069 JNZ    206C
	  5812:206B RET    
	#a2064
	5812:2064 call 2e37
	5812:2067 .
	#
	#l2e37
	  5812:2E37 NOP    
	  5812:2E38 NOP    
	  5812:2E39 NOP    
	  5812:2E3A NOP    
	#a2e37
	5812:2E37 push [894]
	5812:2E3B mov byte[894],1
	5812:2E40 call 1fda
	5812:2E43 pop [894]
	5812:2E47 ret
	5812:2E48 .
	#
	#wbdos.con
	A>



Module:		BDOS.CON			04/13/83
-------

Error Description:
------------------
	This patch improves the preformance of extending a file opened
in the unlocked mode when the multi sector count is greater than 1.

Patch Procedure:
----------------

	A>sid86
	12:45:46 A:SID86.CMD
	SID86 1.01   1/4/83 
	#rbdos.con
	  START      END
	580A:0000 580A:3B7F
	#xcs
	CS 0000 580a+8
	DS 0000 .
	#l3c5
	  5812:03C5 MOV    [080D],BX
	  5812:03C9 TEST   AH,08
	  5812:03CC JZ     03FF
	  5812:03CE CALL   03DD
	#a3c5
	5812:03C5 call 2e48
	5812:03C8 nop
	5812:03C9 .
	#
	#l2e48
	  5812:2E48 NOP    
	  5812:2E49 NOP    
	  5812:2E4A NOP    
	  5812:2E4B NOP    
	#a2e48
	5812:2E48 mov [80d],bx
	5812:2E4C test byte[b4a],80
	5812:2E51 jnz 2e82
	5812:2E53 test byte[89e],80
	5812:2E58 jz 2e82
	5812:2E5A push ax
	5812:2E5B push bx
	5812:2E5C mov si,53
	5812:2E5F or byte[b41],80
	5812:2E64 mov word [80d],0
	5812:2E6A call 334
	5812:2E6D pop ax
	5812:2E6E cmp byte[80e],0
	5812:2E73 jnz 2e81
	5812:2E75 cmp byte[80d],0
	5812:2E7A jz 2e7e
	5812:2E7C mov al,b
	5812:2E7E mov [80d],ax
	5812:2E81 pop ax
	5812:2E82 ret
	5812:2E83 .
	#
	#l190c
	  5812:190C CALL   139E
	  5812:190F CALL   15FA
	  5812:1912 CALL   074B
	  5812:1915 AND    AL,40
	#a190c
	5812:190C call 2e83
	5812:190F .
	#l2e83
	  5812:2E83 NOP    
	  5812:2E84 NOP    
	  5812:2E85 NOP    
	  5812:2E86 NOP    
	#a2e83
	5812:2E83 cmp byte[894],1
	5812:2E88 jnz 2e8d
	5812:2E8A jmp 139e
	5812:2E8D pop bx
	5812:2E8E jmp 1912
	5812:2E91 .
	#
	#wbdos.con
	A>

-------------------------------------------------------------------
Patch #3: GENCMD.COM replacement.
Distribution method: Master distribution diskette #2 patched 4/13/83.
Patch by: Bill Fitler and Danny Horovitz, 4/13/83.
Problem with GENCMD.CON (it GEN'd a short MEM.CON file) was 
solved by using the GENCMD.COM from Danny's system.  
We should have recompiled GENCMD.COM from source, and we did not.




-------------------------------------------------------------------
Patch #4: SUP.CON CLI/Program Load error return.
Distribution method: Master distribution diskette #2 patched 4/13/83.
Patch by: Fran Borda, 4/12/83.
Problem with the CLI/Program Load function when it had an error:
it used to terminate from within the CLI with no error return.
Also, this enables the P_CHAIN function to use the chain entry in 
program loads.


Patch Method:
-------------
	A>sid86
	#rsup.con
	  START      END
	nnnn:0000 nnnn:1EFF
	#l6df
	nnnn:06DF MOV    BYTE [0324],FF
	nnnn:06E4 CALL   0286
	#a6df
	nnnn:06DF jmp 126f
	nnnn:06E2 nop
	nnnn:06E3 nop
	nnnn:06E4 .
	#l126F
	nnnn:126F NOP
	nnnn:1270 NOP
	nnnn:1271 NOP
	nnnn:1272 NOP
	#a126f
	nnnn:126F mov byte[324],ff
	nnnn:1274 mov cx,10e
	nnnn:1277 call 286
	nnnn:127A jcxz 1281
	nnnn:127C mov byte[324],0
	nnnn:1281 jmp 6e7
	nnnn:1284 .
	#wsup.con
	#^C




-------------------------------------------------------------------
Patch #5: SUBMIT.CMD Error handling.
Distribution method: Master distribution diskette #1 patched 4/13/83.
Patch by: Fran Borda, 4/12/83.
Problem was that SUBMIT overwrote the returned error code.

Patch method:
-------------
	A>sid86
	#rsubmit.cmd
	  START      END
	nnnn:0000 nnnn:????
	#l53c
	nnnn:053c ??????
	#a53c
	nnnn:053C nop
	nnnn:053D nop
	nnnn:053E nop
	nnnn:053F .
	#wsubmit.cmd
	#^C
	A>



-------------------------------------------------------------------
Patch #6: GENCCPM.CMD generated bad CCPM.SYS file for large XIOS.
Distribution method: Master distribution diskette #2 patched 4/13/83.
Patch by: Bill Fitler, 4/13/83.
GENCCPM had a problem when an XIOS was too large (>32K, plus tables).


Patch Method:
-------------
	A>sid86
	#rgenccpm.cmd
	  START      END
	nnnn:0000 nnnn:BB7F
	#l2f75
	nnnn:2F75 PUSH   FEF6[BP]
	nnnn:2F79 POP    AX
	nnnn:2F7A CWD
	nnnn:2F7B MOV    FEF4[BP],DX
	nnnn:2F7F MOV    FEF2[BP],AX
	#a2f75
	nnnn:2F75 mov ax,fef6[bp]
	nnnn:2F79 xor dx,dx
	nnnn:2F7B .
	#wgenccpm.cmd
	#^C
	A>