HP Model 743 PC Owner's Manual page 94

Figure 4-8
Table 4-7
Pin
Number
1
2
3
4
5
6
7
8
9
4-20
Connecting Cables
Printer Connections
HP Parallel Connector
Table 4-7 shows the connector pinouts for the HP parallel connector.
HP Parallel Connector Pinouts
Pin
Signal
Number
NSTROBE 10
Data 0 11
Data 1 12
Data 2 13
Data 3 14
Data 4 15
Data 5 16
Data 6 17
Data 7 18
Pin
Signal
Number
NACK 19
BUSY 20
PE 21
SLCT 22
NAFD 23
NERROR 24
NINIT 25
NSCT IN
GND
Signal
GND
GND
GND
GND
GND
GND
GND