CONTENTS Introduction Macintosh Port Pinouts Other Pinouts Macintosh Cable Pinouts Macintosh to Non-Apple Product Cable Pinouts References Downloadables

This note gives pinouts for Macintosh ports, cables, and other products. [Oct 01 1989]

Introduction

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.

Back to top

Macintosh Port Pinouts

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)

Other Pinouts

Back to top

Macintosh Cable Pinouts

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.

Back to top

Macintosh to Non-Apple Product Cable Pinouts

Back to top

References

Macintosh Hardware Reference Manual

Technical Note M.HW. MacPlusPinouts -- Macintosh Plus Pinouts

Back to top

Downloadables

Back to top

Developer Documentation | Technical Q&As | Development Kits | Sample Code