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comp.os.msdos.programmer FAQ part 3/5
Section - - But aren't the COM ports always at I/O addresses 3F8, 2F8, 3E8, and 2E8?

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Top Document: comp.os.msdos.programmer FAQ part 3/5
Previous Document: - How do I find the I/O address of a COM port?
Next Document: - How do I configure a COM port and use it to transmit data?
See reader questions & answers on this topic! - Help others by sharing your knowledge
Date: 5 Feb 2002 22:03:03 -0400

 The first two are usually right (though not always); the last two are
 different on many machines.

User Contributions:

1
Ben in Seattle
⚠
Jun 2, 2026 @ 4:16 pm
Another solution is to use a parallel port loopback plug. It makes the PC think there is a printer attached. The benefit of this is it doesn't require anticipating the problem with ANSI.SYS escape sequences nor does it make you wait half an hour for the "Abort, Retry, Ignore?" prompt, as some versions of DOS do.

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Top Document: comp.os.msdos.programmer FAQ part 3/5
Previous Document: - How do I find the I/O address of a COM port?
Next Document: - How do I configure a COM port and use it to transmit data?

Part1 - Part2 - Part3 - Part4 - Part5 - Single Page

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Last Update March 27 2014 @ 02:11 PM