Apple twentieth anniversary mac Servicehandbuch
Specifications
I/O Devices - 9
I/O Devices
Keyboard
Twentieth Anniversary Macintosh custom keyboard; draws
25-80 mA (varies with keyboard model used)
Trackpad
Solid-state keyboard-mounted trackpad (ADB device); can be
removed and repositioned; draws up to 10 mA
Microphone
Apple PlainTalk microphone (optional)