Mouse wheel codes via keyboard interface

[borb]

Wheel up/wheel down can be sent to the Amiga. OS 3.1 had support for this in the AmigaGuide renderer for Multiview, which is useful as a test. The codes are referred to as "NewMouse" standard from the serial mouse driver in Aminet. I assume the codes were already referred to in a document somewhere prior to NewMouse implementing them. Because these codes reside above $80, they only need a single event transmission and not the typical down/up event of a keystroke.

It's possible that the mouse may need some form of mode switch much like the PS/2 era mice did to put them into 3 or 4 byte packet mode. This has not been tested.