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- Serial port of MSI RS480M2-IL motherboard.
August 8, 2006, 7:10 pm
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RS480M2-IL motherboard ? I assembled several computers
based on this mobo last year, but neither I nor,
apparently, any of my customers/clients have had reason
to use the serial port until now.
I tried to install an external dial-up modem for a friend
today, but Windows could not detect it. To make a long
story short, it turned out that the culprit was a mismatch
between the mobo serial port header and the supplied
The cable is wired according to the usual pin ordering
convention, but the header pins on the mobo are *not*
numbered in the usual order. AFAIK, such double-row header
pins are usually numbered like this -
2 4 6 8 ....
1 3 5 7 ....
but the serial port headers on this mobo are numbered
like this -
6 7 8 9 x
1 2 3 4 5
The numbering by itself wouldn't matter except that each
pin number serves the same function as it would in a more
conventional layout. That is -
1 - DCD
2 - S-IN
3 - S-OUT
I can't change the pin layout on the mobo of course. I
solved the problem by desoldering the wires at the back
of the D-sub connector and resoldered them in the
If there's anyone out there who's been having problems
trying to get the serial port of this mobo working, I
hope this helps. However, it's possible that not all
production batches are shipped with this mismatched
Re: Serial port of MSI RS480M2-IL motherboard.
There are two "standards" for header to DB9 adapters.
One is DTK and the other one Intel. You didn't have
to solder a cable, as you can buy both types already