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)

 

 

pin 13

 

pin 1

 

 

 

 

 

I

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

hooooooeoooL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

piti 25

 

pin 14

 

Parallel Port Connector Pin Assignments

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin

Signal

 

 

 

 

Pin

Signal

 

 

Pin

Signal

1

stnAx?

 

 

 

 

10

ACK’

 

19

Signal ground

2

Data 0

 

 

 

 

11

Busy

 

20

Signal ground

3

Data 1

 

 

 

 

12

PE

 

21

Signal ground

4

Data 2

 

13

Select

 

22

Signal ground

5

Data 3

 

 

 

 

14

Auto’

 

23

Signal ground

6

Data 4

 

 

 

 

15

El-K-P

 

24

Signal ground

7

Data 5

 

 

 

 

16

hit

 

25

Signal ground

8

Data 6

 

17

Selectin*

 

 

 

 

 

9

Data 7

 

 

 

 

18

Signal ground

 

 

 

 

 

*Active low logic

Serial Port Connector Pin Assignments

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

 

 

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 Assignments

Pin

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

VGA Port Connector Pin Assignments

EPSON Equity 4+ 4

10/1/93