Macintosh Communication Port to Printer
RS-422 Host interface
Normally, the Macintosh comes with a
Table
Macintosh |
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| Printer |
Signal | DCE |
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| DTE | Signal |
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FG | 1 |
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| 1 | FG | |
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| |||||
| 2 | 2 | TD | |||
SG | 3 | 3 | RD | |||
| 4 |
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| 4 | RTS | |
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| |||||
TD | 5 |
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| 5 | CTS | |
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| |||||
| 6 | 6 | ||||
DSR | 7 | 7 | SG | |||
| 8 | 8 | DCD | |||
RD | 9 | 20 | DTR | |||
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The
Table
Host |
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| Printer |
Signal |
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| Signal |
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GND | 1 |
|
| 1 | FG |
| |||||
SG | 8 |
|
| 8 | SG |
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| ||||
TD | 2 |
| 2 | TD | |
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| ||
9 |
| 9 | |||
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| |||
RD | 4 |
| 4 | RD | |
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| ||
11 |
| 11 | |||
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| |||
DCD | 5 |
| 5 | DCD | |
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| ||
12 |
| 12 | |||
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| |||
ST2 | 6 |
| 6 | ST2 | |
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13 |
| 13 | |||
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| |||
ST1 | 7 |
| 7 | ST1 | |
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| ||
14 |
| 14 | |||
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|
| |||
DTR | 3 |
| 3 | DTR | |
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| ||
10 |
| 10 | |||
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Wiring Diagrams and Electrical Data |