This appendix contains the keyboard interface specification for A1000, A500, A2000 and A3000. The keyboard plugs into the Amiga computer via a cable with four primary connections . The four wires provide 5-volt power, ground, and signals called KCLK (keyboard clock) and KDAT (keyboard data). KCLK is unidirectional and always driven by the keyboard; KDAT is driven by both the keyboard and the computer. Both signals are open-collector; there are pullup resistors in both the keyboard (inside the keyboard microprocessor) and the computer. Keyboard Communications Reset Warning Keycodes Hard Reset Caps Lock Key Matrix Table Out-of-Sync Condition Special Codes Power-Up Sequence
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