Apple IIc keyboard pinout

[option8]

While working on my project to connect various retro machines to USB keyboards, I've had to work out the Apple IIc (//c) keyboard connector pinouts. For future reference and illumination, they are included here.

The IIc keyboard, like the IIe, is a matrix of switches that connects to a 34-pin connector on the logic board (as opposed to the IIe's 26). The connector is labelled J9.

I derived this from the documents at Apple2Online.com (http://apple2online.com/index.php?p=1_15_Apple-IIc) and my experience wiring up the keyboard adapter for my previous //c project (http://mentalhygiene.com/meet-the-g4-apple-c/ )

I'm not certain about a few of the pins (marked ???). If you know anything more specific about the functions of these, please let me know.

Share and enjoy!


Keyboard matrix

X0 1 2 3 4 5 6 7 8 9
Y0 ESC 1 2 3 4 6 5 7 8 9

1 TAB Q W E R Y T U I O

2 A D S H F G J K ; L

3 Z X C V B N M < > ?

4 \ + 0 -

5 ~ P [ ]

6 RET UP SPC "

7 DEL DN LT RT


Matrix
J9

X0 31
1 24
2 22
3 8
4 14
5 6
6 10
7 1
8 4
9 2

Y0 12
1 33
2 18
3 20
4 3
5 5
6 7
7 9

NC 13
17
30

GND 21

SFT 34
CTL 32
CMD 16
CMD 26
CAPS 28


J9 pinout
1 X7
2 X9
3 Y4
4 X8
5 Y5
6 X5
7 Y6
8 X3
9 Y7
10 X6
11 DISK LED (5v)
12 Y0
13 NC
14 X4
15 KEYBOARD SW
16 CLOSED APPLE
17 NC
18 Y2
19 40/80 COL SWITCH
20 Y3
21 GROUND ???
22 X2
23 GROUND ???
24 X1
25 POWER LED (5v)
26 OPEN APPLE
27 LED GROUND ???
28 CAPS LOCK
29 RESET
30 NC
31 X0
32 CONTROL
33 Y1
34 SHIFT