Technote HW 19 | April 1985 |
Below are pinout descriptions for the Macintosh ports, cables, and various other products. Please refer to the Hardware chapter of Inside Macintosh and the Macintosh Hardware Reference Manual for more information, especially about power limits. Note that unconnected pins are omitted.
Pin Name Description/Notes 1 Ground 2 +5V See Inside Macintosh for power limits 3 Ground 4 TxD+ Transmit Data line 5 TxD� Transmit Data line 6 +12V See Macintosh Hardware chapter for power limits 7 HSK HandShaKe: CTS or TRxC, depends on Zilog 8530 mode 8 RxD+ Receive Data line; ground this line to emulate RS232 9 RxD� Receive Data line
Macintosh Mouse Connector (DB-9)
Note for the cable descriptions below:
The arrows ("Æ") show which side is an input and which is an output. For example, the notation "a Æ b" means that signal "a" is an output and "b" is an input.
When pins are said to be connected on a side in the Notes column, it means the pins are connected on that side of the connector.
Further Reference: