Category: Main page » Computer

Macintosh Keyboard


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

4 pin RJ11 female
4 pin RJ11 female connector  at the computer
Pin Name Dir Description
1CGND---Chassis ground
2KBD1?Keyboard clock (input to VIA)
3KBD2?Serial data line
4+5V-->+5 VDC

Note: Direction is Computer relative Keyboard.

4 pin RJ11 male
4 pin RJ11 male connector  at the keyboard

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