Dell Inspiron 3500 System Reference Manual page 141

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 port
sends and receives data in parallel format, where eight data bits (one byte) are sent simultaneously over eight separate lines.
The parallel port 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 port 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 serial connector.
Pin Assignments for the Parallel Connector
The following figure shows the pin assignments for a parallel connector.
Pin Signal
1 STB#
2 PD0
3 PD1
4 PD2
5 PD3
6 PD4
7 PD5
8 PD6
9 PD7
10 ACK#
11 BUSY
12 PE
13 SLCT
14 AFD#
15 ERR#
16 INIT#
17 SLIN#
18–25 N/A
Shell N/A
Monitor Connector
Use the 15-pin monitor connector to attach an external monitor to the computer.
Pin Assignments for the Monitor Connector
The following figure shows the pin assignments for a monitor connector.
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 Parallel data bit 0
I/O Parallel data bit 1
I/O Parallel data bit 2
I/O Parallel data bit 3
I/O Parallel data bit 4
I/O Parallel data bit 5
I/O Parallel data bit 6
I/O Parallel data bit 7
I Acknowledge
I Busy
I Paper end
I Select
O Automatic feed
I Error
O Initialize printer
O Select in
N/A Signal ground
N/A Frame ground