Parallel Connector - Dell Inspiron 2500 Factory Service Manual

Ports and Connector Pin-Outs : Dell Inspiron 2500 Systems
5 GND
6 DSR
7 RTS
8 CTS
9 RI
Shell N/A

Parallel Connector

Use the 25-hole parallel connector to attach a parallel device to the computer. The parallel connector is
used primarily for printers. The parallel connector transmits data in parallel format, where 8 data bits
(one byte) are sent simultaneously over eight separate lines.
The parallel connector can also be configured for compatibility with the PS/2 standard. Support for the
EPP feature improves network adapter performance (adapters connect to the computer's parallel
connector and require the appropriate software drivers from the adapter's manufacturer).
If you reconfigure your hardware, you may need pin number and signal information for the parallel
connector.
Pin Signal
1 STB#
2 D0
3 PD1
4 PD2
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N/A Signal ground
I Data set ready
O Request to send
I Clear to send
I Ring indicator
N/A Frame ground
I/O Definition
I/O Strobe
I/O Printer data bit 0
I/O Printer data bit 1
I/O Printer data bit 2