Computer buses and slots connectors pinouts  > Apple pinouts
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Pin
Name Direction Description
1 GND  
2 DMA IN  
3 INT IN  
4 /NMI -?-  
5 /IRQ -?-  
6 /RES -?-  
7 /INH -?-  
8 -12V -?-  
9 -5V -?-  
10 NC  
11 7M -?-  
12 Q3 -?-  
13 CLK1 -?- Clock 1
14 USER 1 -?-  
15 CLK0 Clock 0
16 /DEVSEL low means port is active
17 D7 Data Lines
18 D6  
19 D5  
20 D4  
21 D3  
22 D2  
23 D1  
24 D0  
25 +12V  
26 +5V  
27 DMA OUT  
28 INT OUT  
29 /DMA -?-  
30 RDY -?-  
31 /STROBE -?-  
32 NC  
33 R/W high:Reading Data+Add. low:Writing Data+Add.
34 A15 Address Lines
35 A14  
36 A13  
37 A12  
38 A11  
39 A10  
40 A9  
41 A8  
42 A7  
43 A6  
44 A5  
45 A4  
46 A3  
47 A2  
48 A1  
49 A0  
50 I/O SEL -?-  

unknown connector
at the computer, looking at the apple from the front
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Source(s) of this and additional information: The Apple Connection Book
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