
4.9.4 Parallel port
The parallel port is normally used to connect the CPU card to a printer through a DB25 connector. The
Table
Printer port | CN3 |
| Printer port | CN3 |
| ||
Pin | Signal | Pin | Signal | Pin | Signal | Pin | Signal |
|
|
|
|
|
| ||
1 | /STROBE 70 | STROBE 14 | \AUTOFD | 141 | AUTOFD | ||
2 | DO | 69 | PD0 | 15 | ERR | 142 | ERR |
|
|
|
|
|
|
|
|
3 | D1 | 140 | PD1 | 16 | \INIT | 71 | INIT |
|
|
|
|
|
|
|
|
4 | D2 | 68 | PD2 | 17 | \SLCTINI | 72 | SLCTIN |
|
|
|
|
|
|
|
|
5 | D3 | 139 | PD3 | 18 | GND | 9 | GND |
6 | D4 | 67 | PD4 | 19 | GND | 9 | GND |
|
|
|
|
|
|
|
|
7 | D5 | 138 | PD5 | 20 | GND | 10 | GND |
|
|
|
|
|
|
|
|
8 | D6 | 66 | PD6 | 21 | GND | 10 | GND |
|
|
|
|
|
|
|
|
9 | D7 | 143 | PD7 | 22 | GND | 11 | GND |
|
|
|
|
|
|
|
|
10 | \ACK | 64 | ACK | 23 | GND | 11 | GND |
|
|
|
|
|
|
|
|
11 | BUSY | 137 | BUSY | 24 | GND | 12 | GND |
|
|
|
|
|
|
|
|
12 | PE | 65 | PE | 25 | GND | 12 | GND |
13 | SLCT | 144 | SLCT |
|
|
|
|
|
|
|
|
|
|
|
|
Chapter 4 | 49 |