- Thread starter
- #21
F
Franc Zabkar
On Mon, 8 Sep 2008 15:11:01 -0700, jj mac <jj
mac@discussions.microsoft.com> put finger to keyboard and composed:
>Thank you Franc
>The COM port is enabled in the BIOS setup. I have not replaced the CMOS
>battery for about three years but the time and date settings are correct so I
>am assuming that it is OK.
>I would like to test the Com Port but before attempting to do so I would
>like a little bit more advice. When you say to use a paper clip to connect
>any output pin to any imput pin do you mean to connect say RXD to TXD
Yes, this will verify those two signals.
> or DTR
>or RTS on the COM port an the computer.?
Connect, say, RTS to CTS, and DTR to DSR, at the same COM port
connector at the rear of the computer.
> Does the flash appear the same for
>each connection. ?
The flash rates differ so that the user can easily associate the
various signals with LEDs in an RS232 breakout box, or with readings
on a multimeter.
Here is a typical RS232 breakout box:
http://www.escience.ca/GFX/PRODS/XC-138.jpg
There are other COM port diagnostic programs, but they require a
special loopback connector, eg http://www.iec.net/l1341.html
>Is there a danger of creating a short if say pin 2 was
>inadvertently connected to pin 5.?
>Are any precautions necessary?
>The Win98 Computer does not have an internet connection. which means that I
>cannot download directly to it. Instead of testing the RAM I intend to
>replace it.
>Thanks for your help
When your mouse stops responding in Windows, hold down Ctrl-Esc, then
press R, and type the following into the Run box:
C:\WINDOWS\CONTROL.EXE sysdm.cpl,system,1
This should bring up Device Manager.
Now type F to reFresh the device list. If your mouse hardware has
hung, then this may restart it. Otherwise, if your mouse stops
responding as a consequence of a general system hang, then this won't
fix it.
BTW, typical mouse failures include intermittent cables. I had to
shorten the cable in my mother's serial mouse for the this reason (a
replacement mouse wasn't available from the local stores).
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
mac@discussions.microsoft.com> put finger to keyboard and composed:
>Thank you Franc
>The COM port is enabled in the BIOS setup. I have not replaced the CMOS
>battery for about three years but the time and date settings are correct so I
>am assuming that it is OK.
>I would like to test the Com Port but before attempting to do so I would
>like a little bit more advice. When you say to use a paper clip to connect
>any output pin to any imput pin do you mean to connect say RXD to TXD
Yes, this will verify those two signals.
> or DTR
>or RTS on the COM port an the computer.?
Connect, say, RTS to CTS, and DTR to DSR, at the same COM port
connector at the rear of the computer.
> Does the flash appear the same for
>each connection. ?
The flash rates differ so that the user can easily associate the
various signals with LEDs in an RS232 breakout box, or with readings
on a multimeter.
Here is a typical RS232 breakout box:
http://www.escience.ca/GFX/PRODS/XC-138.jpg
There are other COM port diagnostic programs, but they require a
special loopback connector, eg http://www.iec.net/l1341.html
>Is there a danger of creating a short if say pin 2 was
>inadvertently connected to pin 5.?
>Are any precautions necessary?
>The Win98 Computer does not have an internet connection. which means that I
>cannot download directly to it. Instead of testing the RAM I intend to
>replace it.
>Thanks for your help
When your mouse stops responding in Windows, hold down Ctrl-Esc, then
press R, and type the following into the Run box:
C:\WINDOWS\CONTROL.EXE sysdm.cpl,system,1
This should bring up Device Manager.
Now type F to reFresh the device list. If your mouse hardware has
hung, then this may restart it. Otherwise, if your mouse stops
responding as a consequence of a general system hang, then this won't
fix it.
BTW, typical mouse failures include intermittent cables. I had to
shorten the cable in my mother's serial mouse for the this reason (a
replacement mouse wasn't available from the local stores).
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.