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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
This connector is present on the Macintosh 128K, 512K, 512K enhanced, and Macintosh Plus.
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.
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Pinouts.ru > Input devices (keyboards, mices, joysticks) pinouts > Pinout of Macintosh Keyboard and layout of 4 pin RJ11 female connector and 4 pin RJ11 male connector
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