This library allows arduino to emulate ps2 keyboard and/or mouse, so you can implement your own ps2 keyboard or whatever... I want to improve this, provide better documentation and arduino library ...
An interrupt-on-change routine (The PET sets a ROW to read) sets outputs (Columns) for the PET to read back as keypresses. A main loop is created to catch bytes from the PS2 keyboard, Once a PS2 byte ...