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Macintosh Plus Pinouts


Macintosh Pinouts

SCSI Cable - external
25 PIN D-SUB FEMALE to the Mac.
50 PIN IDC FEMALE to the peripheral.

To the Mac To the peripheral
  DSub IDC
Request 1 48
Message 2 42
Input/Output 3 50
Input/Output 3 50
Acknowledge 5 38
Busy 6 36
Data Bus 0 8 2
Data Bus 3 10 8
Data Bus 5 11 12
Data Bus 6 12 14
Data Bus 7 13 16
Control/Data 15 46
Attention 17 32
Select 19 44
Data Parity 20 18
Data Bus 1 21 4
Data Bus 2 22 6
Data Bus 4 23 10
Termination Power 25 26

Note: All the other pins (7+9+14+16+18+24) at the DSub should be connected to the all odd pins except 25 at the IDC connector.

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Mac Plus pinouts - Information from The Hardware Book
Macintosh Plus Serial Connectors (Mini DIN-8)


Apple System Peripheral-8 Cable
(connects Macintosh Plus to ImageWriter II and Apple Personal Modem)

Female
Male
1
2
2
1
3
5
4
4
5
3
6
8
7
7
8
6

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

Mouse pinouts
Information from Apple Tech Notes

9 PIN D-SUB FEMALE (At the computer)
9 PIN D-SUB MALE
(At the mouse cable)
9 PIN D-SUB FEMALE at the computer.
9 PIN D-SUB MALE at the mouse cable.
Pin Name Dir Description
1 CGND
---
Chassis ground
2 +5V
-->
+5 VDC
3 CGND
---
Chassis ground
4 X2
<--
Horizontal movement line (connected to VIA PB4 line)
5 X1
<--
Horizontal movement line (connected to SCC DCDA-line)
6 n/c
-
Not connected
7 SW-
<--
Mouse button line (connected to VIA PB3)
8 Y2
<--
Vertical movement line (connected to VIA PB5 line)
9 Y1
<--
Vertical movement line (connected to SCC DCDB-line)
Note: Direction is Computer relative Mouse.
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Keyboard cable - Information from Emilio Rossi' Hardware Book

RJ11 FEMALE CONNECTOR at the Computer.
RJ11 MALE CONNECTOR at the Keyboard.
Pin Name Dir Description
1 CGND
---
Chassis ground
2 KBD1
?
Keyboard clock
3 KBD2
?
Keyboard data
4 +5V
-->
+5 VDC


Note: Direction is Computer relative Keyboard.

External floppy drive cable

19 PIN D-SUB FEMALE at the Computer.
19 PIN D-SUB MALE at the Diskdrive.

Pin Name Dir Description
1 CGND
---
Chassis ground
2 CGND
---
Chassis ground
3 CGND
---
Chassis ground
4 CGND
---
Chassis ground
5 -12V
-->
-12 VDC
6 +5V
-->
+5 VDC
7 +12V
-->
+12 VDC
8 +12V
-->
+12 VDC
9 n/c
-
Not connected
10 PWM
?
Regulates speed of the drive
11 CA0
?
Control line to send commands to the drive
12 CA1
?
Control line to send commands to the drive
13 CA2
?
Control line to send commands to the drive
14 LSTRB
?
Control line to send commands to the drive
15 WrReq-
?
Turns on the ability to write data to the drive
16 HdSel
?
Control line to send commands to the drive
17 Enbl2-
?
Enables the Rd line (else Rd is tristated)
18 Rd
<--
Data actually read from the drive
19 Wr
-->
Data actually written to the drive

Note: Direction is Computer relative Diskdrive.
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Macintosh Video to VGA (no Macintosh Plus Pinout)

Use this adapter to connect a standard VGA (or higher) monitor to your Apple Macintosh.

15 PIN D-SUB MALE (to the Computer)
15 PIN HIGHDENSITY D-SUB FEMALE (to the Monitor-cable)

15 PIN D-SUB MALE to the Computer.
15 PIN HIGHDENSITY D-SUB FEMALE to the Monitor-cable.

Description
Mac
VGA
Dir
Red Ground
1
6
---
Red
2
1
-->
Composite sync
3
13
-->
Monitor Sense 0
4
4
<--
Green
5
2
-->
Green Ground
6
7
---
Monitor Sense 1
7
11
<--
No connection
8
n/c
Blue
9
3
-->
Monitor sense 2
10
12
<--
Sync Ground
11
10
---
Vertical Sync
12
14
-->
Blue Ground
13
8
---
Horizontal Sync Ground
14
n/c
Horizontal Sync
15
n/c

 

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