I've done a bit of research into how Serial Mice work, I found a lot of primary sources that no longer exist and I've tried to reproduce the relevant bits here. These posts describe the protocol and my project log of making an old serial mouse work.
I spent a few weeks making an old Serial Mouse work and documenting the Serial Mouse Protocols. I was posting a log as I worked. You can find my reference implementation project.
You can use an old microsoft mouse by running npx serial-mouse-parser and find the source on github.
I remembered there was such a thing as a serial mouse and I wondered how they worked. A bit of googling found me this link (which as of this posting has an SSL error). I'm going to reproduce it below but I wanted to write some notes about it first.
