Commodore VIC-20 Programmer's Reference Manual page 299

User 10
12 3 4 5 6
9 10 11 12
ABCDEFHJKLMN
PIN #
1
2
3
4
5
6
8
9
10
11
12
TYPE
GND
+5V
RESET
JOY0
J0Y1
JOY2
LIGHT PEN
CASSETTE SWITCH
SERIAL ATN IN
+ 9V
+ 9V
GND
NOTE
100mA MAX.
100mA MAX.
PIN #
A
B
C
D
E
F
H
J
K
L
M
N
TYPE
GND
CB1
PBO
PB1
PB2
PB3
PB4
PB5
PB6
PB7
CB2
GND
NOTE
283