I have an old Roland S760 sampler from the early 90s. One of the innovations Roland made in this (lower cost) space was to add the ability to hook up a monitor and a mouse, to make chopping samples and programming patches much easier than peering at a tiny screen like on an Akai S1000 of the time (which I also have), or even worse on the S760's tiny two-line display

The mouse connector is MSX, which are very difficult to find these days, so mine came with a DIY MSX->PS2 connector. Sadly the PS2 mouse it came with was on it's last legs, so I wanted to replace it with something more modern. All I could find at the time were MS mice that came with a USB-PS2 connector. When I plugged it in, it barely worked and I could never understand why.

I did finally manage to track down a NOS PS2 mouse and it worked perfectly again. Until this post, I never understood just WHY it didn't work, so thank you!

The S760 is a fantastic sampler. It's kinda like a JD990 but as a sampler and without the full synth engine complexity. Made famous by Daft Punk and a lot of others as the S760 digital multimode filter became one of their signature sounds.