Since I lack a mouse for mine, can I put in a plea
that whoever does
adopt this system consider selling / trading me the mouse? 10 years ago
IBM told me the 6150 mouse was no longer available, but there was a
replacement, for which quoted me 150 pounds. They wouldn't tell me the
part number of the replacement, but I am pretty sure it was just a
Logitech PC mouse and an adaptor to plug it into the 6150. I tried
making my own connector (from a Compaq laptop power supply connector,
iirc), but had little success.
The IBM RT mouse I have (Part No. OOF2383) is definitly a protocol
mouse, as it has a HD63A01XOF processor for two encoders and two buttons
(
http://electrickery.xs4all.nl/tmp/rt_mouse.JPG).
I can check out the wiring and protocol (if not propietary) later.