PARALLEL INTERFACE SPECIFICATION
The C82314* coax interface provides a Centronics parallel data input port to allow automatic sharing of the Epson printer between the 3270 host and an alternate host. The parallel interface was designed to be compatible with popular printer interfaces found on personal computers. The following is a description of
the parallel interface signals:PARALLEL | INTERFACE | SPECIFICATIONS |
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| Signal | Parallel | Direction | Description |
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| Cable |
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1 |
| 19 |
| STROBE | 1 | IN | Strobe pulse to |
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| read data in. Pulse |
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| width must be |
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| more than .5 µsec. |
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| at the interface |
2 |
| 20 |
| DATA1 | 2 | IN | These signals |
3 |
| 21 |
| DATA2 | 3 | IN | represent infor- |
4 |
| 22 |
| DATA3 | 4 | IN | mation in bits 1 to |
5. |
| 23 |
| DATA4 | 5 | IN | 8 of parallel data |
6 |
| 24 |
| DATA5 | 6 | IN | respectively. Each |
7 |
| 25 |
| DATA6 | 7 | IN | signal is HIGH |
8 |
| 26 |
| DATA7 | 8 | IN | when data is logical |
9 |
| 27 |
| DATA8 | 9 | IN | 1 and LOW when it |
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| is logical 0. |
10 |
| 28 |
| ACKNLG | 10 | OUT | A LOW pulse with a |
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| minimum width of 4 |
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| µsec. A low indi- |
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| cates that data has |
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| been received and |
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| that the printer is |
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| ready to accept |
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| more data. |
10