EPSON Equity 4+
Major Subassemblies
Serial Port Connectors (CN9 and CN10)
battery I
CN3 diskette drive bays drive
Connector Pin Assignments
Parallel Port Connector (CNS)
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| pin 13 |
| pin 1 |
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| I |
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| hooooooeoooL |
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| piti 25 |
| pin 14 |
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| Parallel Port Connector Pin Assignments |
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Pin | Signal |
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1 | stnAx? |
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| 10 | ACK’ |
| 19 | Signal ground | ||
2 | Data 0 |
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| 11 | Busy |
| 20 | Signal ground | ||
3 | Data 1 |
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| 12 | PE |
| 21 | Signal ground | ||
4 | Data 2 |
| 13 | Select |
| 22 | Signal ground | |||||
5 | Data 3 |
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| 14 | Auto’ |
| 23 | Signal ground | ||
6 | Data 4 |
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| 15 |
| 24 | Signal ground | |||
7 | Data 5 |
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| 16 | hit |
| 25 | Signal ground | ||
8 | Data 6 |
| 17 | Selectin* |
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9 | Data 7 |
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| 18 | Signal ground |
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*Active low logic
Pin | Signal | Pin | Signal |
1 | Data carrier detect | 6 | Data set ready |
2 | Receive data | 7 | Request to send |
3 | Transmit data | 8 | Clear to send |
4 | Data terminal ready | 9 | Ring indicator |
5 | Not used |
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Keyboard Connector (CN5) and
Mouse Connector (CN4)
pin 6 | pin 5 |
pin 4 + | + pin 3 |
pin 2 | pin 1 |
Although the keyboard and mouse connectors are physically identical, they cannot be used interchangeably.
Keybmrd and Mouse Connector Pin AssignmentsPin | Signal | Pin | Signal |
1 | Data | 4 | +5 VDC (fused) |
2 | Resewed | 5 | Clock |
3 | Ground | 6 | Reserved |
VGA Port Connector (CN13)
Din 5 | pin 1 |
pin 10 | pin 6 |
pin 15 | pin 11 |
EPSON Equity 4+ 4 | 10/1/93 |