Распиновка, расположение выводов и внешний вид платы расширения:
Vic 20 Memory Expansion
Available on Commodore Vic 20 computers. On the left side.
1 TOP 22
+——————-//—————-+
| =================//================ |
+——————//——————+
A BOTTOM Z
(at the Computer)
UNKNOWN CONNECTOR at the Computer.
Pin
Name
Description
A
GND
Ground
B
CA0
Address 0
C
CA1
Address 1
D
CA2
Address 2
E
CA3
Address 3
F
CA4
Address 4
H
CA5
Address 5
J
CA6
Address 6
K
CA7
Address 7
L
CA8
Address 8
M
CA9
Address 9
N
CA10
Address 10
P
CA11
Address 11
R
CA12
Address 12
S
CA13
Address 13
T
I/O 2
Decoded I/O block 2, starting at $9130
U
I/O 3
Decoded I/O block 3, starting at $9140
V
S02
Phase 2 System Clock
W
/NMI
Non maskable Interrupt
X
/RESET
6502 Reset
Y
n/c
Not connected
Z
GND
Ground
1
GND
Ground
2
CD0
Data 0
3
CD1
Data 1
4
CD2
Data 2
5
CD3
Data 3
6
CD4
Data 4
7
CD5
Data 5
8
CD6
Data 6
9
CD7
Data 7
10
/BLK 1
BLK 1 (Memory location $2000 — $3fff)
11
/BLK 2
BLK 2 (Memory location $4000 — $5fff)
12
/BLK 3
BLK 3 (Memory location $6000 — $7fff)
13
/BLK 5
BLK 5 (Memory location $a000 — $bfff)
14
RAM 1
RAM 1 (Memory location $0400 — $07ff)
15
RAM 2
RAM 2 (Memory location $0800 — $0bff)
16
RAM 3
RAM 3 (Memory location $0c00 — $0fff)
17
V R/W
Read/Write from Vic chip (1=R, 0=W)
18
C R/W
Read/Write from CPU (1=R, 0=W)
19
/IRQ
6502 Interrupt Request
20
n/c
Not connected
21
+5V
+5 VDC
22
GND
Ground
Contributor:
Joakim Цgren
Source:
Inside your Vic 20 by Ward Shrake
"The Vic Revealed" by Nick Hampshire, 1982, Hayden Book Co, Inc.
"Vic20 Programmer’s Reference Guide", 1992, Commodore Business, Machines, Inc. and Howard W. Sams & Company, Inc.
Copyright © The Hardware Book Team 1996-2004.
May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2002-01-10