developer-toolkit-v1.01/installed/MODEL2.MAC

UTF-8 rendering of a DOS-encoded (CP437 / CRLF) file. Byte-for-byte original: MODEL2.MAC.

;-----------------------------------------------------------------------
;	(C)Copyright Microsoft Corporation, 1984, 1985, 1986
;
; 	Modified version for Adlib. 1990
;
;--------------------------------------------------------------------------


memS	equ	0	; small model
memM	equ	0	; medium model
memC	equ	0	; compact model
memL	equ	1	; large model
memH	equ	0	; huge model



	IF	memS
LDATA	EQU	0
LPROG	EQU	0
	ENDIF
	IF	memM
LDATA	EQU	0
LPROG	EQU	1
	ENDIF
	IF	memC
LDATA	EQU	1
LPROG	EQU	0
	ENDIF
	IF	memL
LDATA	EQU	1
LPROG	EQU	1
	ENDIF
	IF	memH
LDATA	EQU	1
LPROG	EQU	1
	ENDIF



; near DATA segement, for each models:
DATAS	MACRO
_DATA	SEGMENT WORD PUBLIC 'DATA'
	ENDM

EDATAS	MACRO
_DATA	ENDS
	ENDM


DATA?S	MACRO
_BSS	SEGMENT WORD PUBLIC 'BSS'
	ENDM

EDATA?S	MACRO
_BSS	ENDS
	ENDM


CONSTS	MACRO
CONST	SEGMENT WORD PUBLIC 'CONST'
	ENDM

ECONSTS	MACRO
CONST	ENDS
	ENDM


STACKS	MACRO
STACK	SEGMENT PARA STACK 'STACK'
	ENDM

ESTACKS	MACRO
STACK	ENDS
	ENDM


CODES	MACRO name
	IF memS OR memC
_TEXT	SEGMENT WORD PUBLIC 'CODE'
	ASSUME	CS: _TEXT
	ENDIF
	IF memM OR memL OR memH
name&_TEXT SEGMENT WORD PUBLIC 'CODE'
	ASSUME	CS: name&_TEXT
	ENDIF
	ENDM

ECODES	MACRO name
	IF memS OR memC
_TEXT	ENDS
	ENDIF
	IF memM OR memL OR memH
name&_TEXT ENDS
	ENDIF
	ENDM


	

;-------------------------------- EXTERN -----------------------------------
EXTERN  MACRO  name
	IF  LPROG
	  extrn &name:  far
	ELSE
	  extrn &name:  near
	ENDIF
	ENDM


;-------------------------------- BEGIN ------------------------------------
;**
;
; 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 ------------------------------------
ENTRY	MACRO	name
	PUBLIC	NAME
	IF	LPROG
name	LABEL	FAR
	ELSE
name	LABEL	NEAR
	ENDIF
	ENDM


;-------------------------------- MCALL ------------------------------------
MCALL	MACRO name
	IF LPROG
	call	far ptr name
	ELSE
	call	name
	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


;-------------------------------- penter -----------------------------------
penter	MACRO	dyns			; used when we enter a procedure
	push	BP			; save context register
	IF	dyns NE 0
	sub	SP, dyns		; local variables on stack
	ENDIF
	mov	BP, SP			;
	push	DI			; for register variables (MICROSOFT 'C' 3.0)
	push	SI			;
	ENDM				;

;-------------------------------- pleave -----------------------------------
pleave	MACRO	dyns			; used when we leave a procedure
	pop	SI			;
	pop	DI			;
	IF	dyns NE 0
	add	SP, dyns		;
	ENDIF
	pop	BP			;
	ret				;
	ENDM				;