.MODEL SMALL,C
	.CODE

ST_wait PROC uses si di,arg1:dword
	mov	di,word ptr [arg1][2]
	mov	si,word ptr [arg1][0]
	mov	ah,2ch
lp:	int	21h
	sub	si,1
	jz	@f
	sbb	di,0
	jmp	lp
@@:	or	di,di
	jnz	lp
	ret
ST_wait ENDP
	END