Working with this 486 motherboard: https://www.elhvb.com/mboards/chicony/ch471b/ch-471b.html
It has two onboard 10-pin COM connectors, but my serial port has a 9-pin ribbon cable. I'm not sure of the history here but is there any easy way to rewire the serial cable to work with a 10-pin connector so my serial mouse works?
lilhoser wrote on 2021-01-17, 20:09:Working with this 486 motherboard: https://www.elhvb.com/mboards/chicony/ch471b/ch-471b.html
It has two onboard 10-pin COM connectors, but my serial port has a 9-pin ribbon cable. I'm not sure of the history here but is there any easy way to rewire the serial cable to work with a 10-pin connector so my serial mouse works?
That link doesn't contain info about the serial ports, but almost certainly that 10th pin is NC, i.e. Not Connected. So your 9-wire cable should work fine. Have you tried it?
The 9-pin ribbon cable has a piece of plastic in the 10th pin female pin hole, so I'd have to bore that out somehow. Any suggestions?
You can safely cut/break the 10th pin off the board, as it is not connected to anything. Just make sure you remove the correct pin.
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debs3759 wrote on 2021-01-17, 21:31:You can safely cut/break the 10th pin off the board, as it is not connected to anything. Just make sure you remove the correct pin.
I am nervous about breaking motherboard pins, so I used a drill bit to drill out the 10th connector hole. Fits fine but mouse isn't working through it.
lilhoser wrote on 2021-01-17, 23:05:debs3759 wrote on 2021-01-17, 21:31:You can safely cut/break the 10th pin off the board, as it is not connected to anything. Just make sure you remove the correct pin.
I am nervous about breaking motherboard pins, so I used a drill bit to drill out the 10th connector hole. Fits fine but mouse isn't working through it.
- have you lined up pin 1 with cable and board?
- how are you testing the mouse? and what kind is it?
Generally ctmouse is the driver to use, with some Mouse Systems mice you need to specifiy ctmouse /m
yep pin 1 is aligned. using msinput\mouse.exe /f
hardware is an old logitech serial mouse
There are two types of serial headers. Using a multimeter, check if you have GND on pin 5 at the DB9 connector. If not, your ribbon cable/DB9 is wired for the other type of header. Pretty easy to correct with a bit of soldering.
https://pinoutguide.com/Motherboard/rs232_hea … er_pinout.shtml
