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page 80,132
title CP/DOS DosGetVersion mapper
dosxxx segment byte public 'dos'
assume cs:dosxxx,ds:nothing,es:nothing,ss:nothing
;
;**********************************************************************
;*
;* MODULE: dosgetversion
;*
;* CALLING SEQUENCE:
;*
;* push@ word versionword pointer
;* call dosgetversion
;*
;* MODULES CALLED: PC-DOS Int 21h, ah=30h, get version
;*
;*********************************************************************
public dosgetversion
.sall
include macros.inc
str struc
old_bp dw ?
Return dd ?
Data dd ? ; return data area pointer
str ends
dosgetversion proc far
Enter dosgetversion
lds si,[bp].data ; set pointer
mov ah,30h ; get DOS version
int 21h
mov byte ptr [si],ah ; minor version
mov byte ptr [si]+1,al ; major version
exit: mexit ; pop registers
sub ax,ax
ret size str - 6
;
dosgetversion endp
dosxxx ends
end
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