Commodore VIC-20 - Page 328

314 The VIC 20 User Guide
2 3 4 S 6 7 8 9 10 II 12
A
BCD E F H J K L
M N
Pin No.
Type
I
GND
2 +SV
3
RESET
4 JOYO
S
JOYI
6
JOY2
7
LIGHT PEN
8
CASSETTE SWITCH
9
SERIAL ATN IN
10
+9 V (100 rnA max)
II
GND
12
GND
A
GND
B
CBI
C
PBO
D
PBI
E
PB2
F
PB3
H
PB4
J
PBS
K
PB6
L
PB7
M
CB2
N
GND
FIGURE Co5. User port pinout