Commodore Computers 1541 - Page 30

PIN CONFIGURATIONS:
6502
6522
VSS
1
40
= CA1
PAO
2
39
= CA2
PA1
3 38
= RSO
PA2
4
37
= RS1
PA3
5
36
= RS2
PA4
6
35
= RS3
PA5
7 34
= R ES
PA6
8 33
= DO
PA7
9
32
= D1
PBO
10 31
= D2
PB1
11
30
= D3
PB 2
12 29
= D4
PB3
13 28
= D5
PB4
14
27
= D6
PB5
15
26
= D7
PB 6
16 25
=>J2 f2
PB 7
17
24
= CS1
CB1
e = 18 23
= CS2
C B 2
19
22
= R/W
v c c
20
21
= IRQ
901437-01
Versatile Interface
Adapter (VIA)
A /d
1 V
■*'24
□ vCC
A eC
2
23
□ A.
A sC
3
2 2
□ a.
A 4C
4
21
□ we
A3 d
5
2 0
□ OE
a2|Z
6
19
□ Aio
A id
7
18
□ CE
Aod
8
17 □ I/O7
l/Ood
9
16
□ i/o6
l/Oid
1 0
15
□ l/0 5
I/O2 C
11
14
□ I/O4
vss d
1 2
13
□ l/0 3
l/O0 t/07
2048 X 8 STATIC RAM
Approved Replacements
Mitsubishi M58725P
Toshiba TMM2016P
HM6116LP-4/AP-20
Hitachi