Is the connector for the PS/2 mouse port there? Maybe you can just solder one in.

You can buy brand new optical serial mice off of eBay for pretty cheap. They do, however, require the special gridded mouse pad that come with them.

The other option is to use a Raspberry Pi and a USB to Serial adapter and thus make a USB to Serial mouse adapter.
See this post for a link to the project on Github:
USB to serial mouse adapter - Raspberry Pi

You could also build a PS2 to serial adapter, but the Pi method is going to be a whole lot simpler/quicker and you will have a much wider range of mice available if you use USB.

Unknown_K wrote:

Is the connector for the PS/2 mouse port there? Maybe you can just solder one in.

There is, but the installed AT connector straddles the PS/2 keyboard and PS/2 mouse locations, so I would have to remove it and mount both PS/2 ports. While that isn't out of the question, there could conceivably be other missing or different components required to have the ports work, and I don't see any Zappa boards for sale on eBay except from Russia at the moment so I don't want to take the chance.

You could always run extension wires for the PS/2 ports to somewhere else, even if you had to run the wires from the bottom of the board if the AT connector is physically blocking holes for the PS/2 ports.

You could build this:
https://hackaday.io/project/27575-ps2-to-rs23 … mouse-converter

GadgetBlues wrote:

While that isn't out of the question, there could conceivably be other missing or different components required to have the ports work,

AT keyboard connector is only mechanically different from PS/2 keyboard connector, so the parts for PS/2 keyboard port are certainly there (and the AT connector is most probably connected to the same PCB tracks as PS/2 keyboard would be).

First I'd try with wires connected to the bottom for PS/2 mouse before doing more invasive changes.

You can't connect a PS/2 mouse to a keyboard port, so I don't see the point of your post. Don't get confused by those very late PS/2 combo ports used on some notebooks and office PCs until a few years ago. No such thing existed back then.

derSammler wrote:

You could build this:
https://hackaday.io/project/27575-ps2-to-rs23 … mouse-converter

I have built three of these. Two are already promised to another member of this forum. The third one I wanna keep. I can tell you that they are fun to build, although already a bit advanced, since the PCB is very small and has a few SMD components. Also mine are not yet working. 😀 I only get a blinking red LED...

But IF they start working I think they are a very nice solution. Especially since you can mount them on a nice 3D printed bracket inside of the computer case.

You can't get a PS/2 ISA card or if the mobo has a PS/2 mouse header?

derSammler wrote:

You can't connect a PS/2 mouse to a keyboard port, so I don't see the point of your post

Nobody wanted to do this in this thread, I think.

PS/2 doesn't operate on ISA resources. It needs to be provided by the keyboard controller, south bridge, or other element of the chipset (although it's definitely a different port).