[mythtv-users] Serial port PCI card and problem controlling external DirecTV box

Allan Wilson allanwilson at gmail.com
Fri Feb 24 17:04:52 UTC 2006


You will probably have to set it manually with the setserial command to get
it to work. I have an old RH system and to get addon serial cards to work I
run

lspci -v

to find the card and get it I/O addresses. Then write those I/O addresses
down and then run

setserial /dev/ttyS? port 0x????

where the first question mark is the serial port you want to assign to it
and the next four is one of the I/O addresses you found. Then run

setserial /dev/ttyS? -v autoconfig

to see if it is the I/O address. You know when you have the right one
because the uart will be 16650. It is usually the first I/O address. If the
uart doesn't look right or says unknown then try the first setserial with
another port until you get it right. When you find the right one set the irq
with

setserial /dev/ttyS? irq ?

and then check your /proc/tty/driver/serial file to see if it looks correct.
Once you have done all this you have to make sure that your card is
initialized again on bootup. Different distros do this in different ways.
Anyhow hope this helps and if you still have problems tell us your distro so
I can be more specific.

Allan

On 2/24/06, Nick <knowledgejunkie at gmail.com> wrote:
>
> On 24/02/06, Steve Dorsey <info at dorseygraphics.com> wrote:
> > Hello
> >
> >    I have one on-board serial port on my motherboard. I use it to
> > control my DirecTV DRD435RH Satellite receiver. It works great.
> >
> >    I bought a second identical receiver, and it also works great, but
> > I had no second serial port, so I bought a PCI card that had one port
> > on it. I dropped it in the PC, and it does not work.
> >
> >    It is a SYBA IOC-2000 DB9 Serial card with Netmos 9820 Chipset.
> >
> >    Can anyone help me get this working? I'm not sure even where to
> > start.
>
> Does the card get detected by the BIOS/kernel, and does it appear in
> lspci?
>
> Are there jumpers on the card to control the serial port config? Does
> it work if you disable the onboard serial port? (could be conflicting)
>
> Nick
> _______________________________________________
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> mythtv-users at mythtv.org
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>
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