Appendix B: I/O Port Pin Assignments
Parallel Port
Pin
Signal
Pin
Signal
1
Strobe#
14
Auto Linefeed#
2
Data 0
15
Error#
3
Data 1
16
Initialize#
4
Data 2
17
Select In
5
Data 3
18
GND
6
Data 4
19
GND
7
Data 5
20
GND
8
Data 6
21
GND
9
Data 7
22
GND
10
ACK#
23
GND
11
Busy
24
GND
12
Paper Empty
25
GND
13
Select
Serial Port
Pin
Signal
1
DCD (Data Carrier Detect)
2
RXD (Received Data)
3
TXD (Transmitted Data)
4
DTR (Data Terminal Ready)
5
GND (Signal Ground)
6
DSR (Data Set Ready)
7
RTS (Request To Send)
8
CTS (Clear To Send)
9
RI (Ring Indicator)
RCA Jack
Pin
Signal
1
Video-in
2
GND
Appendix B: I/O Port Pin Assignments
B-1
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