The low-level XA/XB/YA/YB signal must be watched by software (the 300Hz interrupt is probably too slow to sense fast motions, so there's little chance to have the mouse driver running in background).
== CPC Plus Compatibility == The circuit reportedly doesn't work on CPC Plus computers.The Atari-ST adapter is supported by G-Paint 2Probably simply because of the missing Fire3 signal on the joystick port of the CPC Plus.0There are also additional diodes in the CPC Plus, which may drop the voltages a little, but probably do not cause problems in this case.
== Software supporting the ST-Mouse ==
* G-Paint 2.0 (Günter Radestock)
* [[FutureOS]]
[[Category:Hardware]] [[Category:Peripherals]] [[Category:DIY]]