COM2 P4C800-E Deluxe

  • Thread starter Thread starter Ken
  • Start date Start date
K

Ken

Hello!
Are there anybody ho knows the pin define of the com2
on the motherboard P4C800-E Deluxe?
I tried to get an "serial port bracket (COM2)" to my new
motherboard but it seems to be impossible here in Sweden.
I tried to get the pinout from the ASUS support in Taiwan,
but they don't know the pinout on the motherboard (!)
Then I have to try every combinations to se if it is working
and that would take a lot of time and effort, or are there
some here in the group already knowing the pinout for COM2
on that motherboard? I can make my own "serial port bracket"
only if I know the pinout on the motherboard.
http://hardwarebook.net/connector/serial/serial9.html
 
Ken said:
Hello!
Are there anybody ho knows the pin define of the com2
on the motherboard P4C800-E Deluxe?
I tried to get an "serial port bracket (COM2)" to my new
motherboard but it seems to be impossible here in Sweden.
I tried to get the pinout from the ASUS support in Taiwan,
but they don't know the pinout on the motherboard (!)
Then I have to try every combinations to se if it is working
and that would take a lot of time and effort, or are there
some here in the group already knowing the pinout for COM2
on that motherboard? I can make my own "serial port bracket"
only if I know the pinout on the motherboard.
http://hardwarebook.net/connector/serial/serial9.html
Click to expand...
A regular contributor to this group, prepared a web page
with the answer:

http://home.att.net/~Tom.Horsley/p4c800e.html

Tom claims this is the part right here.

http://www.pccables.com/cgi-bin/ord...o=07120&search=DB9M&rsite=pccables.com&rcode=

There are two versions, and on the pccables site, they are numbered
07120 and 07121. 07120 is described as the AT-Everex-Intel cable
(suitable for P4C800-E Deluxe). 07121 is described as "DTK version".
I've never dealt with COM2 on my board, so cannot vouch for the
info, and I wasn't able to find anything else on this adapter.

HTH,
Paul
 
A regular contributor to this group, prepared a web page
with the answer:

http://home.att.net/~Tom.Horsley/p4c800e.html

Tom claims this is the part right here.

http://www.pccables.com/cgi-bin/ord...o=07120&search=DB9M&rsite=pccables.com&rcode=

There are two versions, and on the pccables site, they are numbered
07120 and 07121. 07120 is described as the AT-Everex-Intel cable
(suitable for P4C800-E Deluxe). 07121 is described as "DTK version".
I've never dealt with COM2 on my board, so cannot vouch for the
info, and I wasn't able to find anything else on this adapter.

HTH,
Paul
Click to expand...


Thank you! Now I can make this by myself and mount it
on the same bracket as the Firewire connector, that has
room for this COM2.
 
A regular contributor to this group, prepared a web page
with the answer:
http://home.att.net/~Tom.Horsley/p4c800e.html
Click to expand...

Now my COM2 port is working.
I drilled holes in the back of my case and mount a 9 pin D-sub
male connector and solder a 9 pole flat cable and pressed the
other end in a connector that fit the motherboard and it's
working and looks perfect. Better than original because it now
don't take any space in a PCI slot or another important places.

Thank you Paul for your help.
 
Ken said:
Now my COM2 port is working.
I drilled holes in the back of my case and mount a 9 pin D-sub
male connector and solder a 9 pole flat cable and pressed the
other end in a connector that fit the motherboard and it's
working and looks perfect. Better than original because it now
don't take any space in a PCI slot or another important places.

Thank you Paul for your help.
Click to expand...
Glad it worked out for you. I wasn't sure the pinouts on that
page were correct. I tried sketching a few possibilities on
paper, but none of them lined up with Tom's info. But as
he did the experiments, I gave him the benefit of the doubt.
So, now we can give it the "verified" seal of approval :-)

BTW - One thing I learned from the experience, is that
motherboard (my motherboard), has a Texas Instruments
GD75232 chip for COM2. That chip needs -12V to work. If you
ever find the COM2 port dies, and yet the computer continues
to run, check the BIOS power monitor page and see if -12V
is still working. I thought most computers used MAX232 style
chips, that only need +5V, but to my surprise, this motherboard
goes "backward in time", and uses an old chip that needs
multiple supply voltages.

Paul
 
Glad it worked out for you. I wasn't sure the pinouts on that
page were correct. I tried sketching a few possibilities on
paper, but none of them lined up with Tom's info. But as
he did the experiments, I gave him the benefit of the doubt.
So, now we can give it the "verified" seal of approval :-)

BTW - One thing I learned from the experience, is that
motherboard (my motherboard), has a Texas Instruments
GD75232 chip for COM2. That chip needs -12V to work. If you
ever find the COM2 port dies, and yet the computer continues
to run, check the BIOS power monitor page and see if -12V
is still working. I thought most computers used MAX232 style
chips, that only need +5V, but to my surprise, this motherboard
goes "backward in time", and uses an old chip that needs
multiple supply voltages.
Click to expand...

My ASUS P4C800-E Deluxe looks to use the Texas GD75232 chip for
COM2 because it's placed next to the COM2 connector on the board.
 
BTW - One thing I learned from the experience, is that
motherboard (my motherboard), has a Texas Instruments
GD75232 chip for COM2. That chip needs -12V to work. If you
ever find the COM2 port dies, and yet the computer continues
to run, check the BIOS power monitor page and see if -12V
is still working. I thought most computers used MAX232 style
chips, that only need +5V, but to my surprise, this motherboard
goes "backward in time", and uses an old chip that needs
multiple supply voltages.

Paul
Click to expand...

This pinout worked for my P4S800D-E too. Lucky I had a suitable cable
that I could just pull the pins out of the header block and re-arrange
them in the correct order :-)

Trouble with voltage-pump MAX232-type chips is that you don't get the
full voltage range - it something like +/-10V instead of +/-12V. That
doesn't stop it working but it would limit the length of cable you can
use.

ChrisH
 
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