Bob,

One way to test your serial port is with a loopback plug (although it is
unlikely to be bad, more likely a baud rate or cable problem to the
receiver).

The following web site shows the wiring for loopback for a 25 pin RS232
port..
http://www.aggsoft.com/rs232-pinout-cable/serial-port-loopback-db25-n.htm,

the following gives a 9 pin loopback wiring..
http://www.aggsoft.com/rs232-pinout-cable/serial-port-loopback-db9-c.htm

Once you have a loopback plug connected, use hyperterminal (Start ->
Accessories -> Communications -> Hyperterminal), create a new connection
using the com port in question, and set the baud rate. Anything you type
should be echoed on the screen through the loopback, if not, then the port
could be bad.

Russ Poffenberger
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-----Original Message-----
From: PCBUILD - Personal Computer Hardware discussion List
[mailto:[log in to unmask]] On Behalf Of bobwarasila
Sent: Monday, January 03, 2005 5:10 AM
To: [log in to unmask]
Subject: [PCBUILD] serial port problem


I'm trying to run a GPS receiver off the serial port on my ASUS
P4P800-Deluxe.  The device manager says the serial port is enabled and
working.  The BIOS also says it's enabled. However the GPS software (Duleo)
says it can not find the receiver.  How can I confirm my serial port is in
fact functional?  Unfortunately I have no other serial devices to
substitute.   I have a serial (9-pin) to PS/2 adaptor cable and a straight
serial cable (9-pin) to play with if that helps.

Bob Warasila

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