[CentOS] Need to test serial port connection

[Anne Wilson]

On Thursday 26 February 2009 13:37:00 William L. Maltby wrote:
> > 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. But wait until you have things working - I suspect you
> have _two_ ports (probably 1 9 pin and 1 25 pin). A second port of 25
> pins might easily be mistaken for a printer port. Long ago a switch from
> Centronics style to RS-232 style began to become the "standard".
> Physically, it looks the same as a serial port, the visual difference
> being the "gender" of the connector will be opposite.

Just to update you on this.  I checked the motherboard manual, and it clearly 
says there is one serial port and one parallel port.  Strange that 
/var/log/messages seemed to report two, isn't it?

Anne
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