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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
\
i
SIMM 1
diskette
speaker drive
Connector Pin Assignments
Parallel Port Connector (CN6)
pin 13
pin 1
i-1
pin 25 pin 14
Parallel Port Connector Pin Assignments
horizontal
drive bays
Pin Signal
Pin Signal
1
Strobe
10 ACK’
Pin Signal
19
Signal ground
6
7
8
1
9
1
Data
7
*Active low logic
I18
1
Signal
ground
1
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
EPSON Equity-4
4/1/93