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'[EE]: PC serial port died, options?'
2003\03\03@103045 by John Pearson

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I think I toasted com2 on my PC (win98). I have a lot of serial devices and need my serial ports very much.

A program I have that lets me wiggle and test comport lines reports that it can't open com2. Com1 works fine.

Win98 says com2 is working, no conflicts. I tried removing/reinstalling com2, no help.  
Anything I might try, something that may have been corrupted or set to some wrong setting?

If I have lost com2, is there any way of getting more com ports that I can use at the same time. I have USB, can that be converted to serial?

Thanks

John

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2003\03\03@104609 by erholm (QAC)

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I bought a cheap USB->COM port converter a couple of weeks
ago (Sweden).
I have not tested it yet, but there is no reason it shouldn't work...
I came with CD with drivers for Windows 98/98SE, ME, 2000 and XP.
(And MAC OS 8.6 through 9.x...)
On the box it says "USB 1.1 compliant, over 1Mbps transfer rate..."

Jan-Erik Soderholm

John Pearson wrote :
>I have USB, can that be converted to serial?

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2003\03\03@105705 by SavanaPics

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I assume this is a desktop PC if so,and you can't repair the com port on the
mother board, you might want to get a secondary port card. The are very
reasonable these days, even at the high priced used computer store around the
corner. I had one here that had 4 ports.

Jameco,  <A HREF="http://www.jameco.com">http://www.jameco.com</A> has everything from a single port to an 8 port from
less than 20.00 and up You might also look in some of the electronics
magazine ads such as Nuts N Volts,  Everyday Practical electronics or some of
the others

Eddie, kc4awz

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2003\03\03@110031 by Spehro Pefhany

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At 07:42 AM 3/3/2003 -0800, you wrote:
>I think I toasted com2 on my PC (win98). I have a lot of serial devices
>and need my serial ports very much.
>
>A program I have that lets me wiggle and test comport lines reports that
>it can't open com2. Com1 works fine.
>
>Win98 says com2 is working, no conflicts. I tried removing/reinstalling
>com2, no help.
>
>Anything I might try, something that may have been corrupted or set to
>some wrong setting?
>
>If I have lost com2, is there any way of getting more com ports that I can
>use at the same time. I have USB, can that be converted to serial?

Yes. You can also get PCI (or maybe ISA if you don't mind dumpster-diving)
serial port cards (one manufacturer is Lava).

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
spam_OUTspeffTakeThisOuTspaminterlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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2003\03\03@110410 by hael Rigby-Jones

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{Quote hidden}

You can buy PCI cards with 2, 4 or 8 serial ports built in.  The cards with
more ports tend to be only available from e.g. industrial PC suppliers and
the prices tend to reflect this.  The 2 port cards sometimes come with an
extra parallel port and tend to be very cheap, probably less than $10 in the
USA.

Regards

Mike


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2003\03\03@110914 by Joe McCauley

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Yes you can get USB to serial adapters. I'm not sure if all the handshaking
lines are implemented though. If you just need TX & RX it should be OK. The
driver will load it as COM 3 ,4 or 5 so make sure the program you use will
support these ports.
Before doing this try using a dos boot disk and a shareware type serial
comms program to verify the port is really gone. Maybe something like
http://www.modemdoctor.com/html/comset.htm or
http://www.modemdoctor.com/html/dos.htm
There are lots others here http://www.simtel.net/pub/msdos/commprog/

Joe

{Original Message removed}

2003\03\03@111325 by Ned Konz

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On Monday 03 March 2003 07:42 am, John Pearson wrote:
> I think I toasted com2 on my PC (win98). I have a lot of serial
> devices and need my serial ports very much.
>
> A program I have that lets me wiggle and test comport lines reports
> that it can't open com2. Com1 works fine.

Programs can't generally tell that you've fried the port. A failure to
open the port is probably a software problem, not a hardware one.

> Win98 says com2 is working, no conflicts. I tried
> removing/reinstalling com2, no help.

Can you open it with (ugh!) Hyperterminal? If not, you probably have a
software problem.

> Anything I might try, something that may have been corrupted or set
> to some wrong setting?
>
> If I have lost com2, is there any way of getting more com ports
> that I can use at the same time. I have USB, can that be converted
> to serial?

Yes, there are a number of USB->serial converters. I'd recommend the
FTDI-based one http://www.saelig.com/ftdi.htm

--
Ned Konz
http://bike-nomad.com
GPG key ID: BEEA7EFE

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2003\03\03@121828 by Ned Konz

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On Monday 03 March 2003 08:12 am, Ned Konz wrote:
> > If I have lost com2, is there any way of getting more com ports
> > that I can use at the same time. I have USB, can that be
> > converted to serial?
>
> Yes, there are a number of USB->serial converters. I'd recommend
> the FTDI-based one http://www.saelig.com/ftdi.htm

One warning, though, about USB to serial converters (at least the FTDI
chip, probably others too): these chips tend to buffer up characters
and send them all at once in a packet. The problem is that they have
to know when to send the packet (i.e. when you've sent "enough"
characters).

If you have a program (like for a cheap PIC programmer) that expects
to have tight control over status line changes and other timing, it
may not work well or at all with a USB to serial converter.

--
Ned Konz
http://bike-nomad.com
GPG key ID: BEEA7EFE

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2003\03\03@124739 by Marc Joffe

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You may want an expansion PCI card with a serial port on it.

You can buy them from most computer stores.

I have never used one of these, but this one was easy to find.
http://www2.warehouse.com/product.asp?pf%5Fid=VW61292&cat=pc&blind=

Marc

At 07:42 AM 03/03/2003 -0800, you wrote:
{Quote hidden}

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2003\03\03@161248 by Wouter van Ooijen

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> Anything I might try, something that may have been corrupted or set to
> some wrong setting?

Try your BIOS setup, the port might be disabled.

Run DOS, short pins 2 and 3, start a terminal program, and see whether
you get an echo of what you type. (wisp.exe: "wisp com2 term 19k2").

Wouter van Ooijen

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