From: Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Hardware Ports?
Date: 26 May 2003 09:33:35 GMT
Organization: Aachen University of Technology (RWTH)
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bill <bill AT hawkeselectronics DOT com> wrote:
> I am trying to set up the UART of a PC. Can anyone tell me how to set 
> and read hardware ports using DJGPP, or possably a refference to the 
> information.

For the case of the UART, save yourself the hassle and use an existing
library instead.

As to direct port programming: it's done essentially the same way on
all DOS-based compilers, with only minor differences.  There are specialized
support calls in the runtime library, like

	outportb
	inportw

and so on.  Learn about them in 

	info libc alpha outportb

Each compiler tends to give these a slightly different name, thus the
synonyms provided by DJGPP: outb, outp, outpw, inb, inp, ...
-- 
Hans-Bernhard Broeker (broeker AT physik DOT rwth-aachen DOT de)
Even if all the snow were burnt, ashes would remain.