Major subassemblies, Connector pin assignments, Parallel port connector (cns) – Epson Equity 4+ User Manual
Page 4: Serial port connectors (cn9 and cn10), Keyboard connector (cn5) and mouse connector (cn4), Vga port connector (cn13), Epson equity 4, Parallel port connector
EPSON Equity 4+
Major Subassemblies
Serial Port Connectors (CN9 and CN10)
battery
I
CN3
diskette
drive
drive bays
Connector Pin Assignments
Parallel Port Connector
pin 13
pin 1
I
I
25
14
Parallel Port Connector Pin Assignments
Pin
Signal
Pin Signal
1
10
ACK’
2
Data 0
11
Busy
Pin Signal
19
Signal ground
20
Signal ground
3
Data 1
4
Data 2
5
Data 3
6
Data 4
12
PE
21
Signal ground
13
Select
22
Signal ground
14
Auto’
23
Signal ground
15
24
Signal ground
7
Data 5
16
25
Signal ground
8
Data 6
17
9
Data 7
18
ground
*Active low logic
Serial Port Connector Pin Assignments
Pin
Signal
Pin
Signal
1
Data carrier detect
6
Data
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
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.
and Mouse Connector Pin Assignments
Pin
Signal
Pin
Signal
1
Data
4
(fused)
2
Resewed
5
Clock
3
Ground
6
Reserved
VGA Port Connector (CN13)
Din 5
pin 10
pin 15
VGA Port Connector Pin Assignments
pin 1
pin 6
pin 11
EPSON Equity 4+ 4
10/1/93