From: Jason Green <news AT jgreen4 DOT fsnet DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: _bios_serialcom() in djgpp
Date: Sat, 04 Mar 2000 23:11:11 +0000
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To: djgpp AT delorie DOT com
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wsimpson AT my-deja DOT com wrote:

> My current problem is that when I try to read the device hooked up to
> com1, I get nothing really. If I print it as
> %d the value is 32768
> %c prints a vertical space
> %s garbage
> I think it is because the initialization of the port failed, or because
> the reading of the data from the port failed, or both. Hence my
> questions.

Try:

unsigned char data;

And/Or:

printf("%02X", data & 0xFF); /* Two digit hex */

Or some such combination. ;-)