[CentOS] Need to test serial port connection

[Anne Wilson]

On Thursday 26 February 2009 19:50:16 Scott Silva wrote:
> on 2-26-2009 8:55 AM Anne Wilson spake the following:
> > On Thursday 26 February 2009 13:37, William L. Maltby wrote:
> >>>> Look in your /var/log/messages file. At boot, you should see the
> >>>> device recognized.
> >>>
> >>> Feb 26 12:12:25 borg2 kernel: serial8250: ttyS0 at I/O 0x3f8 (irq = 4)
> >>> is a 16550A
> >>> Feb 26 12:12:25 borg2 kernel: serial8250: ttyS1 at I/O 0x2f8 (irq = 3)
> >>> is a 16550A
> >>
> >> Didn't you say there was only one port? There might be a second on the
> >> main board that is accessible via a header. If it's not hooked up
> >> disable all but the first in the BIOS (later). It's not really hurting
> >> anything as is, but it will free the I/O address and IRQ for assignment
> >> to other devices.
> >
> > I believe you are right. I remember those - and the 25-9-pin adapter :-).
> > Peering around the back in a dark corner, I  could well have been
> > mistaken. OK - female socket, so that's a  COM port, I think.
> >
> > Now I'm really confused.  The BIOS definitely only shows one COM port. 
> > To be honest, I can't remember whether I connected it or not.  I guess I
> > ought to open the box and see what's what, but not today - it's already
> > too late to do that.
>
> Is there an internal modem? It might account for a second serial port.

No.  It's a fairly standard motherboard build

Anne
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