Macintosh Keyboard connector

#Computer#Input Peripherals

This connector is present on the Macintosh 128K, 512K, 512K enhanced, and Macintosh Plus.

4 pin RJ11 FEMALE connector pin-out & layout

4 pin RJ11 FEMALE connector  at the computer

1CGND---Chassis ground
2KBD1?Keyboard clock (input to VIA)
3KBD2?Serial data line
4+5V-->+5 VDC
Note: Direction is Computer relative Keyboard.

Keyboard PS/2 connector

Macintosh Mouse connector