exxos's Atari, Amiga & retro forum

stephen_usher wrote: 27 Oct 2024 16:06 This Czech blog shows four types of mouse... http://www.krupkaj.cz/sblog/article_det ... id=9000017

This is an image from that blog post...

STM1-vnitrek.jpeg

Yours looks the closest to the third one along.

I'd agree, 3rd one is the charm, though interesting to see it has a plug, unlike yours which is soldered, the wiring more closely matching the first.

Makes me wonder if the cable has already been shortened and the plug cut off, perhaps being a repair.

danboid wrote: 27 Oct 2024 17:01

rubber_jonnie wrote: 27 Oct 2024 14:38 My best suggestion at this point is my original one of using a multimeter in continuity mode to check the cable from plug to mouse.

That's the first thing I did. When I couldn't beep out a few of the wires, I tried to hack away at the port end of the mouse connector to get a better view of the wiring but getting in there was much more tricky than I thought and I severed at least one wire and cut at least one finger trying to expose the wiring.

Hmm, well not all of my wires beeped out either, but the mouse works. Wonder why some are connected, but seemingly don't go back to the plug.

I should explain what I did.

I first beeped it out with the original (very short) Atari cable intact. At least 2 IIRC of the wires weren't beeping out so I presumed it was most likely to be the cable at fault, It would seem the cable is usually the first thing to fail on these mice so I got a Atari joystick extension cable, lopped the female end off and soldered it onto the Atari mouse cable, matching all of the wires up by colour.

I was able to solder each wire in each cable to a match colour and the wiring is "factory" on the mouse end of the cable as I didn't rewire that but I'm not sure its wired up correctly on the joystick side or maybe my cable is too long- I think its about 1.5m long. All 8 wires beep but are they beeping the right connection?

danboid wrote: 27 Oct 2024 17:12 I should explain what I did.

I first beeped it out with the original (very short) Atari cable intact. At least 2 IIRC of the wires weren't beeping out so I presumed it was most likely to be the cable at fault, It would seem the cable is usually the first thing to fail on these mice so I got a Atari joystick extension cable, lopped the female end off and soldered it onto the Atari mouse cable, matching all of the wires up by colour.

I was able to solder each wire in each cable to a match colour and the wiring is "factory" on the mouse end of the cable as I didn't rewire that but I'm not sure its wired up correctly on the joystick side or maybe my cable is too long- I think its about 1.5m long. All 8 wires beep but are they beeping the right connection?

FYI both my STM1 mice have about a 1M cable give or take. That is an original cable BTW.

As I said, I wouldn't go by the wiring colours, they're just so often different between peripherals so your joystick cable may have the same coloured wires but they may not go to the same coloured wires on your mouse.

My option here would be, if you have a chunk of the old mouse cable, cut it fairly short and close to the plug (This should avoid bad bits of cable) and use a multimeter to buzz out what pin goes to what wire and note the colour. Those colours should still match what you have at the mouse end.

Then do a similar mapping for the joystick extender cable only don't cut it short, just map each pin to a colour for that cable.

Using the 2 mappings you should then be able to connect the pins correctly and just connect what colour on the new cable maps to what colour on the mouse end. That way if the colours don't match, then you can connect the new cable colours to whatever matches the pin mapping for the old cable.

By having the old and new mappings and correlating them you will know what pin on the new cable matches what pin on the old.