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Pinout von ROM I/O Timer (6846)
| VSS | 1 | O |
40 | <− |
A8 | |
| A7 | −> |
2 | 6846 | 39 | −> |
A9 |
| A6 | −> |
3 | 38 | <− |
A10 | |
| A5 | −> |
4 | 37 | <− |
RESET | |
| A4 | −> |
5 | 36 | >> |
IRQ | |
| CS0/CS0 | −> |
6 | 35 | <> |
CP2 | |
| R/W | −> |
7 | 34 | <− |
CP1 | |
| DB0 | <> |
8 | 33 | <− |
A0 | |
| DB1 | <> |
9 | 32 | <− |
A1 | |
| DB2 | <> |
10 | 31 | <− |
A2 | |
| DB3 | <> |
11 | 30 | <− |
A3 | |
| DB4 | <> |
12 | 29 | VCC | ||
| DB5 | <> |
13 | 28 | <> |
P7 | |
| DB6 | <> |
14 | 27 | <> |
P6 | |
| DB7 | <> |
15 | 26 | <> |
P5 | |
| CS1/CS1 | −> |
16 | 25 | <> |
P4 | |
| CTG | −> |
17 | 24 | <> |
P3 | |
| CTC | −> |
18 | 23 | <> |
P2 | |
| CTO | <− |
19 | 22 | <> |
P1 | |
| E | −> |
20 | 21 | <> |
P0 |