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From: Cesar Rabak <crabak AT acm DOT org>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: help on DOS serial communication using DJGPP
Date: Tue, 04 May 2004 19:20:07 -0300
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mohd hamizi ahmad escreveu:
> i've tried to communicate between embedded system to PC using serial
> communication. my embedded system using DOS operating system. i've tried
> to send a character to PC and should be display on hyperterminal. i've
> tried but nothing happen. i've check my program, and i think there is no
> problem. could anybody check my simple program down here? maybe i make a
> mistake and you can tell me where my mistake. 
[snipped]

> while(1) 
> { 
> // send a push keyboard character to com2 
> com1_send = _bios_serialcom(_COM_SEND, 1, (unsigned)getch()); 
> printf("Send status: 0x%4.4X\n", com1_send); 
> } 

You mention your DOS system is an embedded one, anyhow, is there a means 
of reading the results of these printf calls?