Modify old soft to run on XP

From: RPH <remy.cousinie@xxxxxxxxx>
Date: Tue, 04 Sep 2007 05:50:46 -0700

Hello,

I have an old console soft who run on 16 bits, with serial access...
But on XP, don't work

Here a piece of IO code :

;(**********************************************)
;(* *)
;(* envoi d'un caractere sur la ligne *)
;(* caractere dans CL *)
;(**********************************************)
send PROC FAR
PUSH BP
PUSH DS
push ax
push dx

mov dx,ad_pcom
add dx,5
l1: in al,dx
test al,20h
jz l1
sub dx,5
mov al,cl
out dx,al

pop dx
pop ax
POP DS
POP BP
RET
SEND ENDP
page

I don't know where to start to modify it ?

thank for your idea

.

Follow-Ups:
- Re: Modify old soft to run on XP
  - From: Wolfgang Kern
- Re: Modify old soft to run on XP
  - From: Herbert Kleebauer

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