Any Known Issues when using both RS-232 and Native Serial Ports?

David Kelly dkelly at
Tue Apr 22 21:05:38 UTC 2008

On Tue, Apr 22, 2008 at 03:41:54PM -0500, Martin McCormick wrote:
> We have a FreeBSD6.2 system capturing serial data on /dev/ttyd0.
> /dev/ttyd1 is currently set up for serial console use and we may
> want to add a third serial port to run yet another serial data
> capture engine.
> 	Since receiving serial data is far more problematic than
> transmitting it, can anybody think of any particular problem one
> might encounter if both the data acquisition ports happened to
> be trying to receive data simultaneously?
> 	The serial console port is not really an issue because
> it will be rarely ever used.

Problems with two lousy little serial ports running at the same time
under FreeBSD?  Heck no! Just use something better than a 16 MHz 386SX
with 640K and you'll be fine. BTDT, and even that little system had no
problems with serial I/O.

David Kelly N4HHE, dkelly at
Whom computers would destroy, they must first drive mad.

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