Category : Files from Magazines
Archive   : PJ84.ZIP
Filename : STARTUP.ASM
include asm.inc
dosseg
NULL segment para public 'BEGDATA'
NULL ends
public psp,startup,dgroup_segment
.data
psp dw 0
dgroup_segment dw 0
.data?
extb _edata,_end
.code
extn set_argc_argv,ms_dos
;; startup
;
; entry AX offset stack
; ES program segment prefix
; SS DGROUP
; exit BP 0
; may use AX,BX,CX,DX,DI,SI,DS,ES
;
startup proc
cld
mov bp,0
mov psp[bp],es
add ax,15 ; compute number of paragraphs
mov cl,4 ; in program
shr ax,cl
mov bx,ss
add bx,ax
sub bx,psp[bp]
mov ah,4Ah ; shrink program memory block for
call ms_dos ; dynamic storage system
mov dgroup_segment[bp],ss
mov al,0 ; zero bss segment
mov cx,offset DGROUP:_end
mov es,dgroup_segment[bp]
mov di,offset DGROUP:_edata
sub cx,di
rep stosb
call set_argc_argv
ret
startup endp
end
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