HwB: Macintosh Serial Connector

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Macintosh Serial

Available on Macintosh Mac 512KE and earlier.

9 PIN D-SUB FEMALE (At the Computer)
9 PIN D-SUB MALE (At the Equipment)

9 PIN D-SUB FEMALE at the computer.
9 PIN D-SUB MALE at the mouse cable.

Pin Name Dir Description
1 GND --- Ground
2 +5V --> +5 VDC. Don't use this one, it may be converted into output handshake in later equipment.
3 GND --- Ground
4 Tx+ --> Transmit Data, positive going component
5 Tx- --> Transmit Data, negative going component
6 +12V --> +12 VDC
7 DSR/HSK <-- Handshake input. Signal name depends on mode: Used for Flow Control or Clock In.
8 Rx+ <-- Receive Data, positive going component
9 Rx- <-- Receive Data, negative going component
Note: Direction is Computer relative Equipment.
Contributor:  ">Ben Harris
Source: Apple Tech Info Library, Article ID: TECHINFO-0001424
Please send any comments to Joakim Цgren.