| Commodore 64 - CARTRIDGE
PORT - 44 PIN view, (outside computer.) |
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22 |
21 |
20 |
19 |
18 |
17 |
16 |
15 |
14 |
13 |
12 |
11 |
10 |
9 |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
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Z |
Y |
X |
W |
V |
U |
T |
S |
R |
P |
N |
M |
L |
K |
J |
H |
F |
E |
D |
C |
B |
A |
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| Pin |
Name |
Description |
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| 1 |
GND |
Ground |
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| 2 |
+5V |
+5 Volts DC |
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| 3 |
+5V |
+5 Volts DC |
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| 4 |
/IRQ |
Interrupt Request (Low=Active) |
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| 5 |
/CR/W |
READ/WRITE SIGNAL |
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| 6 |
DOTCLK |
8Mhz VideoDot Clock |
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| 7 |
I/O 1 |
I/O Chip select $DE00-$DEFF (Low=Active) |
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| 8 |
/GAME |
GAME (Low=Active Input) |
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| 9 |
/EXROM |
EXROM (Low=Active Input) |
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| 10 |
I/O 2 |
I/O Chip select $DF00-$DFFF (Low=Active) |
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| 11 |
/ROML |
ROM Low ($8000-$BFFF) 8k (Low=Active) |
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| 12 |
BA |
Bus available output |
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| 13 |
/DMA |
Direct Memory Access Request line (Low=Active) |
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| 14 |
CD7 |
Data bit 7 |
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| 15 |
CD6 |
Data bit 6 |
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| 16 |
CD5 |
Data bit 5 |
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| 17 |
CD4 |
Data bit 4 |
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| 18 |
CD3 |
Data bit 3 |
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| 19 |
CD2 |
Data bit 2 |
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| 20 |
CD1 |
Data bit 1 |
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| 21 |
CD0 |
Data bit 0 |
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| 22 |
GND |
Ground |
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| A |
GND |
Ground |
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| B |
/ROMH |
ROM High ($C000-$FFFF) 8k |
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| C |
/RESET |
Reset |
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| D |
/NMI |
Non Maskable Interrupt |
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| E |
S02 |
System 1MHz clock |
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| F |
CA15 |
Address 15 |
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| H |
CA14 |
Address 14 |
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| J |
CA13 |
Address 13 |
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| K |
CA12 |
Address 12 |
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| L |
CA11 |
Address 11 |
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| M |
CA10 |
Address 10 |
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| N |
CA9 |
Address 9 |
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| P |
CA8 |
Address 8 |
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| R |
CA7 |
Address 7 |
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| S |
CA6 |
Address 6 |
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| T |
CA5 |
Address 5 |
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| U |
CA4 |
Address 4 |
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| V |
CA3 |
Address 3 |
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| W |
CA2 |
Address 2 |
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| X |
CA1 |
Address 1 |
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| Y |
CA0 |
Address 0 |
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| Z |
GND |
Ground |
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