Hi, guys!

tl;dr I have a MS Serial Mouse 2.0A that I'm looking to use on a system that only has a PS/2 mouse port. The mouse supports both Serial and PS/2 protocol, so I only need the passive adapter to make it work. I have one such adapter I found in a drawer, but god knows where it came from, because it doesn't work with the mouse. Probing the connections, it doesn't match any pinout I found online, so it might be for something completely different - no idea.

Does anyone have the original passive adapter that came with this mouse in the box and is kind enough to probe the connections for me and jot down the pinout? I'm hesitant to try any other diagrams I find online, either on Google or here on vogons, since there are way too many different versions out there and I'm afraid to damage the mouse by just connecting pins and see if it works. There's risk of putting 5V into a clock or data wire and I'd very much like to avoid that.

For a longer story, my end goal for this is using this serial mouse (and maybe this other one, the famous soap-bar mouse, both of which are Serial) connected to 2 computers (Win 98 and DOS) through a KVM which only supports VGA and PS/2 keyboard and mouse.

Thanks in advance!