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Programming serial (COM1) port on MS-DOS?

Posted on 2003-11-27
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Last Modified: 2010-04-15
Hello,

What is the best way to program a serial port on MS-DOS in C?
For example set protocol to 9600,n,8,1,xon and output "hello world"?

Thanks for your time,
James
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Question by:JamesC2020
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rstaveley earned 150 total points
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The best approach is to use an interrupt service routine. I've programmed several of these in the past, but I'd recommend libraries by others :-)

Greenleaf does a commercial library for this if you want to throw money around, but there are a lot of free alternatives on the net.

e.g.
 http://www.programmersheaven.com/zone3/cat411/6719.htm
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