Technical Specifications
B–4
External System Connectors
This section lists the pin assignments for your system's external connectors.
• Bidirectional enhanced parallel port connector, 25-pin D-submini female
• Serial connectors, 9-pin D-submini male
• Keyboard and mouse connectors, 6-pin mini-DIN
• SCSI port, high-density, shielded
Bidirectional Enhanced Parallel Port Connector
The bidirectional connector provides an interface to a printer or other parallel devices.
Table B–6 lists pin assignments. An asterisk (*) after a signal name indicates an active
low signal.
Table B–6: Bidirectional Parallel Port Pinouts
DB25 Pin Signal Function
1 STB-R* Strobe
2 PRTD0 Printer data bit 0
3 PRTD1 Printer data bit 1
4 PRTD2 Printer data bit 2
5 PRTD3 Printer data bit 3
6 PRTD4 Printer data bit 4
7 PRTD5 Printer data bit 5
8 PRTD6 Printer data bit 6
9 PRTD7 Printer data bit 7
10 ACK* Acknowledge
11 BUSY Busy
12 PE Paper end
13 SLCT Select
14 AUTOFDXT* Autofeed
15 ERR* Error
16 INIT* Initialize printer
17 SLCTIN* Select input
18 to 25 GND Ground
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