Commodore VIC-20 - Page 326

312 The VIC 20 User Guide
I 2 3 4 5 6 7 8 9 IO II 12 I3 14 15 16 17 18 19 20 21 22
I :::::::::::::::::::::: I
ABC D E F H J K L M N P R STU V W X Y Z
Pin
No.
Type
Pin No.
Type
I
GND
12
BLK3
2
CDO
13
BLKS
3
CD!
14
RAMI
4
CD2
IS
RAM2
S
CD3
16
RAM3
6
CD4
17
VR/W
7
CDS
18
CR/W
8
CD6
19
IRQ
9
CD7
20
NC
IO
BLKI
21
+SV
II
BLK2
22
GND
Pin No.
Type
Pin No. Type
A
GND
N
CAIO
B
CAO
P
CAlI
C
CAl
R
CAI2
D
CA2
S
CAI3
E
CA3
F
CA4
H
CAS
T
1/02
U
1/03
V
S02
J
CA6
W
NMI
K
CA7
X
RESET
L
CA8
Y
NC
M
CA9
Z
GND
FIGURE C>2. Expansion port pinout