Kempston Mouse
From Sinclair Wiki
The Kempston mouse was a Bus mouse interface.
Note, the original Mice have a different pinout to either Amiga, Atari or Datel mice, so don't mix them up!
| Port | Port # | decoding | Usage | Notes |
|---|---|---|---|---|
| 64479 | FBDF | xxxx x011 xx0x xxxx | X axis | 00-FF Roll over at 0 |
| 65503 | FFDF | xxxx x111 xx0x xxxx | Y Axis | 00-FF Roll over at 0 |
| 64223 | FADF | xxxx xx10 xx0x xxxx | Buttons | D0:Right D1:Left D2:Middle (Some compatables only) |
