Date : Fri, 05 Jun 1987 03:17:18 GMT
From : mnetor!utzoo!utgpu!water!watmath!watdragon!mdapoz@seismo.css.gov
Subject: Re: zcpr3.3
I just finished getting zcpr3.3 to assemble with M80 version 3.44 (dated Dec 9,
1981). The following is a summary of the changes that are needed to get the
CCP portion to assemble (I still haven't recieved the RCP & FCP portions
from SIMTEL so I don't know what changes need to be made to those files).
1. In all files the square brackets "[" & "]" need to be changed to "(" & ")"
respectively on all conditional assembly statements (ie if's). DON'T do a
global change with a text editor since some square brackets don't need to
be changed!
in the file ZCPR33.Z80:
2. The maclib command must be converted to upper case along with it's arguments
3. The commands .Z80 and ASEG should be added.
in the file Z33HDR.LIB:
4. The extmpath, extmpathadr and whldir equate statements should have the EQU
changed to a DEFL (this should be changed anyways, I think).
in the file Z33MAC.LIB
5. M80 can only handle 6 chars for a macro argument (even in version 3.44) so
the 'command' macro needs to be changed. Following is an updated version:
; Command table entry definition macro
; Macro to form an entry for one command in the table. The first parameter is
; the name to be used for the command (no quotes); the second parameter is the
; flag that indicates whether or not the command is to be enabled; the third
; parameter is the wheel control flag; and the last parameter is the jump
; address to the code that carries out the command. The command names are
; automatically padded out to the correct length (they will be truncated and
; an error message will result if a command name is too long). The characters
; in the command name are automatically converted to upper case.
command macro cmdnam,enaflg,whlflg,addr
if enaflg ;; Generate command only if enabled
whlmask defl whlflg ;; Initialize variables
count defl cmdsize ;; Initialize to size of each command name
irpc char,cmdnam ;; Repeat over letters in command name
count defl count - 1 ;; Count down characters in name
if ( count lt cmdsize )
;; If character is lower case, convert to upper case
if ( '&char' ge 'a' ) and ( '&char' le 'z' )
if whlmask
defb ( '&char' and 5fh ) + 80h
else ;;not whlmask
defb ( '&char' and 5fh )
endif ;;whlmask
else ;;not lower case
if whlmask
defb '&char' + 80h ;; If controlled by wheel, set high bit
else ;;not whlmask
defb '&char' ;; If not restricted, leave high bit clear
endif ;;whlmask
endif ;;lower case
endif ;;( count lt cmdsize )
whlmask defl false ;; Turn off high-bit setting after first char
endm ;irpc
;; Pad command name with blanks
if ( count gt cmdsize ) ;; If we underflowed
*** Command name "&cmdname" is too long / truncated ***
else
rept count
defb ' '
endm
endif ;( count gt cmdsize )
dw addr ;; Dispatch address for command
endif ;enable
endm ;command
After successful assembly, the resultant .REL file was converted to a HEX file
using RELHEX.COM and then merged with the BIOS in the standard manner. Even
though M80 only outputs 6 char labels in the REL file, it still keeps larger
labels during assembly, so the use of large labels in zcpr3.3 doesn't affect
M80 in the least. Hope this helps in getting people stared with assembling
zcpr3.3 with M80.
A side note: zcpr3.3 came up the first time I tried booting it! It did take
me 2 hours to figure out all the changes that needed to be made to the
source files for M80, but after that first successful assemble, it booted
with no problems.
Regarding zcpr 4.0, I'd love to hear what you're doing with it Richard, how
about posting a summary of what's going on with it, either that, or send it
directly to me.
-Mark
"If a hardware problem causes system software to crash, the customer engineer
will blame the system programmer."
Mark Dapoz
mdapoz@watdragon.UUCP