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APPENDIX A: Interface Connections
Appendix A: Interface
Connections
A.1 DB25 Male Parallel Port Connections
Pin
Description
Direction
1
Strobe
Output
2
Data bit 0
I/O
3
Data bit 1
I/O
4
Data bit 2
I/O
5
Data bit 3
I/O
6
Data bit 4
I/O
7
Data bit 5
I/O
8
Data bit 6
I/O
9
Data bit 7
I/O
10
Acknowledge
Input (active low)
11
Busy
Input (active high)
12
Paper end
13
Select
14
Auto Line Feed
(active low)
15
Error
(Fault—active low)
16
Initialize Printer
(Prime—active low)
17
Select Input
(active low)
18-25
Ground
NOTE
All other pins are unconnected.