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From: jvb7u@Virginia.EDU
Newsgroups: comp.os.msdos.programmer
Subject: Re: Generating a serial port interrupt
Keywords: msdos serial port interrupt
Message-ID: <1991Feb28.182455.18954@murdoch.acc.Virginia.EDU>
Date: 28 Feb 91 18:24:55 GMT
Sender: jvb7u@Virginia.EDU
Organization: Department of Astronomy, University of Virginia
Lines: 23

I suspect that it would be much easier to use the parallel port for what
you want to do.  I believe that you can directly drive the interface to
generate an interrupt.  Take a look at the book:

  The IBM personal computer from the inside out / Murray Sargent III and
  Richard L. Shoemaker. -- Rev. ed. -- Reading, Mass. :
  Addison-Wesley Pub. Co., c1986.

for more information.  Also, a nice piece of code to hack up for general
hardware interrupt control (or use it as-is for serial interrupt control)
under MicroSoft C is:

PD1:<MSDOS.C>ASYNCPEC.ARC	Interrupt-driven async comm rtns for MSC 5.x

available from wmsr-simtel.army.mil
(or mirrors/msdos/c/asyncpec.arc on wuarchive.wustl.edu).

Jon
--
Jon Brinkmann					Astronomy Department
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