Re: Access to ttyS0 and ttyS1 confusion

[Mark Gillingham <markgill@uwalumni.com>]

On Sunday, February 22, 2004, at 08:25 AM, Mark Gillingham wrote:

> On Saturday, February 21, 2004, at 05:30 PM, Bill Marcum wrote:
>
> > The BIOS settings for the serial ports should be clearly labeled.
> > Maybe your internal ports are disabled; try "dmesg | grep tty"

The result of dmesg | grep tty is:

ttyS00 at 0x03f8 (irq = 4) is a 16550A
ttyS01 at 0x02f8 (irq = 3) is a 16550A

These results check with the BIOS.

My ttyS* devices are:

ls /dev/ttyS*
/dev/ttyS0  /dev/ttyS1  /dev/ttyS2  /dev/ttyS3

Why does dmesg report an extra zero in the ttyS* above (i.e., 00 and 
01)? Is that my problem? Am I anticipating ttyS0 and ttyS1 and getting 
in actuality ttyS00 and ttyS01? If so do I create /dev/ttyS00 and 
/dev/ttyS01 and then use setserial to establish communication?

Mark