Moxa 8-port serial multiplexor, how-to

Polytropon freebsd at
Sat Jul 25 06:46:17 UTC 2009

On Fri, 24 Jul 2009 10:32:52 -0500, "Doug Poland" <doug at> wrote:
> After reading the handbook(26.2) and man puc(4), sio(4).  man sio(4)
> talks about adding /boot/device.hints but not for my particular
> hardware.  I'm at a loss on how to continue.
> Suggestions, pointers, URLs welcome.

The file is /boot/device.hints. For each serial port, the
following dataset has to be completed:

	hint.sio.<N>.port="0x3F8"	<---+
	hint.sio.<N>.flags="0x10"	<---+--- set up
	hint.sio.<N>.irq="4"		<---+

Still, I don't know how to determine the correct addresses
and IRQs, maybe the documentation belonging to the expansion
card can help...

If I see this correctly, each serial port should then be
visible as a /dev/cuad<N> device file.

>From Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...

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