Apple macintosh se Servicehandbuch
Specifications
I/O Devices - 5
I/O Devices
Keyboards
Apple Keyboard: 81 keys, including numeric keypad and cursor
keys
Apple Extended Keyboard: 105 keys, including 15 function keys,
separate cursor pad, and 10-key numeric keypad
Mouse
Mechanical tracking; optical shaft at 3.94 pulses per mm (100
pulses per in.) of travel; ADB connector