[ILUG] Testing COM ports on Gigabyte Motherboard.

[John Gay]

Well, I had a few looks around and found the wiring for a nul-modem cable and
made one up. I tested this with Hyperterm from WindowsNT, but Hyperterm only
seems to work in minitel mode??? I was reading through the modem HOW-TO, lot of
info, none of it much use to a newbie like me. I played with setserial and read
the MAN page several times. Finally I was able to get the basic concept.
setserial /dev/ttyS0 and /dev/ttyS1 both report fine, but setserial /dev/ttyS2
report device busy. My modem is a U.S.Robotics sportster 56K internal flash
modem. I am fairly confident that this modem does work in Linux from the
documents I've searched on the web. This modem work fine in Windows on COM3 int
4. I have a Crystal Sound card that works with oss installed. I only have the
demo version that only works for 20 minutes at a time, I still want to figure
out how to set up sound for free, I'm just not sure where to look. I also have a
3COM TX ethernet card that seems to be reconised on boot-up, but I don't have a
way to verify this yet.
Is there a way I can use Linux to connect the two COM ports together with my
null-modem cable and test the communications in a similar fashion to the set-up
I tried with Hyperterm from Windows? I've read several MAN pages concerning
serial, terminal and anything else I thought would be helpful, but I'm too new
to Linux to figure this out for myself.
Thanks again for all you assistance and I hope to get my Linux portion fully
working soon.

Cheers,

     John Gay




Liam Bedford <lbedford at wbtsystems.com> on 06/04/99 10:27:20 AM

Sent by:  Liam Bedford <lbedford at wbtsystems.com>


To:   John Gay/IE/3Com
cc:
Subject:  Re: [ILUG] Testing COM ports on Gigabyte Motherboard.






John Gay wrote:

> Thanks for the tip. I've got Linux set-up with a PS/2 mouse and it works. I
> don't really want to risk breaking anything by changing to a serial mouse when
> there should be another way to test the port without tinkering with working
> settings. Like I said, It could just be wrong setting in BIOS, I'm rather
> BIOS-phobic. Any other tips for checking the COM port will be welcome. I have
a
> working Palm III and a good cradle, they both work with the PC here at work.
Do
> you know of some way to use these to verify the COM ports? I also am aware
that
> IRQ conflicts with my modem might also be the culprit, I just don't know
enough
> about these IRQ and COM port setting.

What do you get when you do
setserial /dev/ttyS0 (and then S1 and S2)?

You should get something along the lines of:
/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
/dev/ttyS1, UART: 16550A, Port: 0x02f8, IRQ: 3

If not, then go into the BIOS, go to Integrated Peripherals, and root around in
there for serial ports (IIRC)

Regards
L.