Kempston Mouse Buttons
From SpecNext Wiki
| Number | PortNumber::$FADF |
|---|---|
| Decimal | NumberDec::64223 |
| Short desc. | ShortDesc::Reads buttons on Kempston Mouse. |
| Bit Mask | PortMask::%---- ---0 --0- ---- |
| Readable | Readable::Yes |
| Writable | Writable::No |
| Subsystem | Subsystem::Input |
| Bit | Function |
|---|---|
| 7-4 | contains wheel-delta value (0..15) since previous read. |
| 3 | fourth button |
| 2 | middle button |
| 1 | left button |
| 0 | right button |