From:	fjh AT cs DOT mu DOT OZ DOT AU (Fergus Henderson)
Subject:	Re: Serial IO focusing
24 Aug 1997 11:43:45 -0700 :
Approved:	cygnus DOT gnu-win32 AT cygnus DOT com
Distribution:	cygnus
Message-ID:	<199708220915.TAA03323.cygnus.gnu-win32@murlibobo.cs.mu.OZ.AU>
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Original-To:	koi AT ssa DOT crane DOT navy DOT mil (mark koi)
Original-Cc:	gnu-win32 AT cygnus DOT com (Cygnus GNU-win32 mailing list)
In-Reply-To:	<33FB542A.8271A54F@ssa.crane.navy.mil> from mark koi at "Aug 20, 97 04:31:39 pm"
X-Mailer:	ELM [version 2.4ME+ PL15 (25)]
Original-Sender:	owner-gnu-win32 AT cygnus DOT com

mark koi, you wrote:
> I had a program under DOS which controlled a serial port using a polling
> 
> method.  Now I am trying to use gnu-win32, and I see no libraries for
> things like outp(), inp().

I think you probably just need to define these using inline assembler.

#define outb(value, port) \
  ({ __asm__ __volatile__ ("outb %b0,%w1"::"a" (value), "d" (port)); })

#define inb(port) \
  ({ char _v; \
      __asm__ __volatile__ ("inb %w1,%0":"=a" (_v):"d" (port)); \
      _v; \
  })

However, I haven't tried this...
I don't know if Windows allows direct access to I/O ports like this.
You might have to write a Windows device driver (VxD).

-- 
Fergus Henderson <fjh AT cs DOT mu DOT oz DOT au>   |  "I have always known that the pursuit
WWW: <http://www.cs.mu.oz.au/~fjh>   |  of excellence is a lethal habit"
PGP: finger fjh AT 128 DOT 250 DOT 37 DOT 3         |     -- the last words of T. S. Garp.
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