Dell PowerEdge 2500SC - Manual (Page 6)

Parallel Port Connector
If you reconfigure your hardware, you may need pin number and signal information for the parallel port connector. Figure B-3 illustrates the pin numbers for the parallel
port connector and Table B-2 defines the pin assignments and interface signals for the parallel port connector.
Figure B-3. Pin Numbers for the Parallel Port Connector
Keyboard and Mouse Connectors
The system uses a Personal System/2 (PS/2)-style keyboard and supports a
PS/2-compatible mouse. Cables from both devices attach to 6-pin, miniature Deutsche Industrie Norm (DIN) connectors on the back panel of your system.
Mouse driver software can give the mouse priority with the microprocessor by issuing IRQ12 whenever a new mouse movement is detected. The driver software also
passes along the mouse data to the application program that is in control.
7 RTS O Request to send
8 CTS I Clear to send
9 RI I Ring indicator
Shell N/A N/A Chassis ground
Table B-2. Parallel Port Pin Assignments
Pin Signal I/O Definition
1 STB# I/O Strobe
2 PD0 I/O Printer data bit 0
3 PD1 I/O Printer data bit 1
4 PD2 I/O Printer data bit 2
5 PD3 I/O Printer data bit 3
6 PD4 I/O Printer data bit 4
7 PD5 I/O Printer data bit 5
8 PD6 I/O Printer data bit 6
9 PD7 I/O Printer data bit 7
10 ACK# I Acknowledge
11 BUSY I Busy
12 PE I Paper end
13 SLCT I Select
14 AFD# O Automatic feed
15 ERR# I Error
16 INIT# O Initialize printer
17 SLIN# O Select in
18–25 GND N/A Signal ground