Don't have a mouse to compare with (anyone else with a working mouse that can buzz the wiring through?), wiring on the connector looks reasonable for a serial mouse, based on an MS mouse that also uses 2,3,4,5 & 7. Looks like yours is:
Shield - green
1
2 - brown - Rx (from device)
3 - black - Tx (to device) (used for -ve supply on some MS mice)
4 - blue - DTR (used for +ve supply on some MS mice)
5 - orange - GND
6
7 - white - RTS (+ve supply, possibly used to signal the mouse to ID itself)
8
9

What mouse driver are you using? If you've got a multimeter, might be worth checking what voltages are on each pin, relative to the orange or green wires. Also, with mouse disconnected, check the resistance of each of the wires to make sure there are no breaks (photo seems to show a possible break in the orange wire).

snufkin wrote on 2021-12-29, 16:27:

Don't have a mouse to compare with (anyone else with a working mouse that can buzz the wiring through?), wiring on the connector […]
Show full quote

Don't have a mouse to compare with (anyone else with a working mouse that can buzz the wiring through?), wiring on the connector looks reasonable for a serial mouse, based on an MS mouse that also uses 2,3,4,5 & 7. Looks like yours is:
Shield - green
1
2 - brown - Rx (from device)
3 - black - Tx (to device) (used for -ve supply on some MS mice)
4 - blue - DTR (used for +ve supply on some MS mice)
5 - orange - GND
6
7 - white - RTS (+ve supply, possibly used to signal the mouse to ID itself)
8
9

What mouse driver are you using? If you've got a multimeter, might be worth checking what voltages are on each pin, relative to the orange or green wires. Also, with mouse disconnected, check the resistance of each of the wires to make sure there are no breaks (photo seems to show a possible break in the orange wire).

Hi snufkin,

I'm using standard mouse driver, another generic MS mouse works with the same driver on the same hardware.

(photo seems to show a possible break in the orange wire) <- yeah, tested this no breaks in wires.

aknot wrote on 2021-12-29, 18:34:

Hi snufkin, […]
Show full quote

snufkin wrote on 2021-12-29, 16:27:

Don't have a mouse to compare with (anyone else with a working mouse that can buzz the wiring through?), wiring on the connector […]
Show full quote

Don't have a mouse to compare with (anyone else with a working mouse that can buzz the wiring through?), wiring on the connector looks reasonable for a serial mouse, based on an MS mouse that also uses 2,3,4,5 & 7. Looks like yours is:
Shield - green
1
2 - brown - Rx (from device)
3 - black - Tx (to device) (used for -ve supply on some MS mice)
4 - blue - DTR (used for +ve supply on some MS mice)
5 - orange - GND
6
7 - white - RTS (+ve supply, possibly used to signal the mouse to ID itself)
8
9

What mouse driver are you using? If you've got a multimeter, might be worth checking what voltages are on each pin, relative to the orange or green wires. Also, with mouse disconnected, check the resistance of each of the wires to make sure there are no breaks (photo seems to show a possible break in the orange wire).

Hi snufkin,

I'm using standard mouse driver, another generic MS mouse works with the same driver on the same hardware.

(photo seems to show a possible break in the orange wire) <- yeah, tested this no breaks in wires.

To make it work I had to use ctmouse with options /s /m. Otherwise it's a dead piece of plastic.
You use this dirver and load it in DOS, it'll find the mouse and you can use edit to see if it does anything.

front view of the connector:

5 4 3 2 1
9 8 7 6

wires on mouse connector:
654321

1-x
2- white (3rd)
3- orange (2nd)
4- brown (4th)
5- black (5th) + green (1st)
6-x
7- blue (4th)
8-x
9-x

this way colour doesn't matter

JFYI: This mouse has a serial port connector, but the communication protocol is NOT "Microsoft", but a "Mouse Systems" It's support was removed from latest MS Mouse drivers. It needs it's own GM-6 driver or Cute Mouse ctmouse with /m parameter.

Attaching an original GM-6 mouse driver from Genius for DOS and Windows

Hi all,

Thanks all and especially Zerthimon, this was driver issue! 😀 mousepnp.exe works!

You can also try to keep the left mouse button pushed while powering on the PC. This will switch the protocol to MS mode 😉

Predator99 wrote on 2022-01-07, 17:27:

You can also try to keep the left mouse button pushed while powering on the PC. This will switch the protocol to MS mode 😉

Oh, nice, I didn't know that! Thanks for the info!