Category : C Source Code
Archive   : SDB.ZIP
Filename : DOS.MAC

 
Output of file : DOS.MAC contained in archive : SDB.ZIP
.XLIST
PAGE 58,132
;**
;
; This macro library defines the operating environment for the 8086 L
; memory model, which allows 1M bytes of data and 1M bytes of program.
;
;**
MSDOS EQU 2

;**
;
; The following symbols define the 8086 memory mode being used. Set LPROG
; to 1 for a large program segment (greater than 64K-bytes), and set LDATA
; to 1 for a large data segment. Set COM to 1 to generate .COM files
; instead of .EXE files. Note that if COM is not zero, then LPROG and
; LDATA must be 0.
;
;**
COM EQU 0
LPROG EQU 1
LDATA EQU 1

;**
;
; The following symbols are established via LPROG and LDATA as follows:
;
; S8086 set for small model (small prog, small data)
; D8086 set for model with large data, small prog
; P8086 set for model with large prog, small data
; L8086 set for large model
;
;**
IF (LPROG EQ 0) AND (LDATA EQ 0)
S8086 EQU 1
D8086 EQU 0
P8086 EQU 0
L8086 EQU 0
ENDIF

IF (LPROG EQ 0) AND (LDATA NE 0)
S8086 EQU 0
D8086 EQU 1
P8086 EQU 0
L8086 EQU 0
ENDIF

IF (LPROG NE 0) AND (LDATA EQ 0)
S8086 EQU 0
D8086 EQU 0
P8086 EQU 1
L8086 EQU 0
ENDIF

IF (LPROG NE 0) AND (LDATA NE 0)
S8086 EQU 0
D8086 EQU 0
P8086 EQU 0
L8086 EQU 1
ENDIF


;**
;
; The DSEG and PSEG macros are defined to generate the appropriate GROUP
; and SEGMENT statements for the memory model being used. The ENDDS and
; ENDPS macros are then used to end the segments.
;
;**
DSEG MACRO
DGROUP GROUP DATA
DATA SEGMENT WORD PUBLIC 'DATA'
ASSUME DS:DGROUP
ENDM
ENDDS MACRO
DATA ENDS
ENDM

IF S8086
PSEG MACRO
PGROUP GROUP PROG
PROG SEGMENT BYTE PUBLIC 'PROG'
ASSUME CS:PGROUP
ENDM
ENDPS MACRO
PROG ENDS
ENDM
ENDIF

IF D8086
PSEG MACRO
CGROUP GROUP CODE
CODE SEGMENT BYTE PUBLIC 'CODE'
ASSUME CS:CGROUP
ENDM
ENDPS MACRO
CODE ENDS
ENDM
ENDIF

IF P8086
PSEG MACRO
_CODE SEGMENT BYTE
ASSUME CS:_CODE
ENDM
ENDPS MACRO
_CODE ENDS
ENDM
ENDIF

IF L8086
PSEG MACRO
_PROG SEGMENT BYTE
ASSUME CS:_PROG
ENDM
ENDPS MACRO
_PROG ENDS
ENDM
ENDIF

;**
;
; The BEGIN and ENTRY macros establish appropriate function entry points
; depending on whether NEAR or FAR program addressing is being used. The
; only difference between the two is that BEGIN generates a PROC operation
; to start a segment.
;
BEGIN MACRO NAME ; begin a function
PUBLIC NAME
IF LPROG
NAME PROC FAR
ELSE
NAME PROC NEAR
ENDIF
ENDM

ENTRY MACRO NAME
PUBLIC NAME
IF LPROG
NAME LABEL FAR
ELSE
NAME LABEL NEAR
ENDIF
ENDM

;**
;
; The following symbols are defined to help set up a STRUC defining the
; stack frame:
;
; CPSIZE -> code pointer size (2 or 4)
; DPSIZE -> data pointer size (2 or 4)
;
; These wouldn't be necessary if it were possible to use macros or even
; conditionals within a STRUC.
;
IF LPROG
CPSIZE EQU 4
ELSE
CPSIZE EQU 2
ENDIF
IF LDATA
DPSIZE EQU 4
ELSE
DPSIZE EQU 2
ENDIF
.LIST


  3 Responses to “Category : C Source Code
Archive   : SDB.ZIP
Filename : DOS.MAC

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/