EPSON Equity 4SX/25, 4DX/33, and 4DX2/50
Major Subassemblies
main system option card connector board
board | (option board riser card) | power supply |
’ | SIMM 0 |
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SIMM 1 |
| \ | diskette | horizontal |
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| speaker drive | drive bays | |
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Connector Pin Assignments
Parallel Port Connector (CN6)
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| pin 13 |
| pin 1 |
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| pin 25 |
| pin 14 |
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Parallel Port Connector Pin Assignments |
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Pin | Signal |
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1 | Strobe |
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| 10 | ACK’ |
| 19 | Signal ground | |
6
7
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1 9 | 1 Data 7 | I18 1 Signal ground | 1 |
*Active low logic |
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Serial Port Connectors (CN4 and CN5)
Serial Port Connector Pin Assignments
Keyboard Connector (CN3) and
Mouse Connector (CN2)
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.
Keybcmrd and Mouse Connector Pin Assignments
Pin | Signal | Pin | Signal |
1 | Data | 4 | +5 VDC (fused) |
2 | Reserved | 5 | Clock |
3 | Ground | 6 | Resewed |
VGA Port Connector (CN7)
pin 5 | pin 1 |
pin 10 | pin 6 |
pin 15 | pin 11 |
VGA Port Connector Pin Assignments |
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EPSON | 4/1/93 |