Macintosh Serial

From HwB

Available on Macintosh Mac 512KE and earlier.

[edit] Pinout

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.

[edit] Contributions

• Ben Harris

[edit] Sources

• Apple Tech Info Library, Article ID: TECHINFO-0001424