Input devices (keyboards, mices, joysticks)  > Apple pinouts
This connector is present on the Macintosh 128K, 512K, 512K enhanced, and Macintosh Plus.
Pin Name Dir Description
1 CGND --- Chassis ground
2 KBD1 ? Keyboard clock (input to VIA)
3 KBD2 ? Serial data line
4 +5V --> +5 VDC
4 pin RJ11 female connector layout
4 pin RJ11 female connector
at the computer
4 pin RJ11 male connector layout
4 pin RJ11 male connector
at the keyboard
According to 2 reports in our database (2 positive and 0 negative) this pinout should be correct.

Is this pinout
Source(s) of this and additional information: Apple Tech Info Library, Article ID: TECHINFO-0001424
This page contain parts under Copyright © 2000-2018 by pinouts.ru team.
No portion of this webpage may be reproduced in any form without providing visible HTML link to Old.Pinouts.ru . Webmaster permission required in any other cases.
Efforts have been made to ensure this page is correct, but it is the responsibility of the user to verify the data is correct for their application.