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I would like to create a pair of virtual serial ports that have a virtual null modem cable between them.

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Ended up using com0com and checking the "emulate baud rate" setting on both virtual comm ports. – Justin Tanner Mar 23 '10 at 23:08
up vote 3 down vote accepted

Take a look at com0com. It does exactly what you're trying to do, and is fairly simple to use.

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N8VB vCOM Virtual Serial Ports Driver

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