Technical Note HW10

Macintosh Plus Pinouts

CONTENTS Introduction Macintosh Plus Port Pinouts Macintosh Plus Cable Pinouts References Downloadables

This note gives pinout descriptions for some of the Macintosh Plus ports and Macintosh Plus cables that are different than the Macintosh 128K and 512K. [Jan 01 1986]

Introduction

Below are pinout descriptions for some Macintosh Plus ports and cables that are different than the Macintosh 128K and 512K. Note that any unconnected pins are omitted.

Macintosh Plus Port Pinouts

Figure 1: Macintosh Plus Serial Connectors (Mini DIN-8)

Figure 2: Macintosh Plus SCSI Connector (DB-25)

Pin Name Description/Notes

1 REQ-

2 MSG-

3 I/O-

4 RST-

5 ACK-

6 BSY-

7 Ground

8 DB0-

9 Ground

10 DB3-

11 DB5-

12 DB6-

13 DB7-

14 Ground

15 C/D-

16 Ground

17 ATN-

18 Ground

19 SEL-

20 DBP-

21 DB1-

22 DB2-

23 DB4-

24 Ground

25 TPWR Not connected

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Macintosh Plus Cable Pinouts

Figure 3: Apple System Peripheral-8 Cable

(connects Macintosh Plus to ImageWriter II and Apple Personal Modem )

(Product part number: M0187)

(Cable assembly part number: 590-0340-A (stamped on cable itself).

( DIN-8 ) ( DIN-8 )

1 2

2 1

3 5

4 4

5 3

6 8

7 7

8 6

Macintosh Plus Adapter Cable
(connects Macintosh Plus DIN-8 to existing Macintosh DB-9 cables)

(Apple part number: M0189)

(Cable assembly part number: 590-0341-A (stamped on cable itself).

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References

Macintosh Hardware Reference Manual

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Downloadables

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