Dell Inspiron 4000 - Manual (Page 14)

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.
Docking Connector
Use this connector to attach your computer to the optional port replicator.
Pin Signal I/O Definition
1 STB# I/O Strobe
2 D0 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 P E 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 N/A N/A Ground signal
Shell N/A N/A Frame ground
Pin Signal Pin Signal Pin Signal Pin Signal
1 STRB#/5V 51 HSYNC 101 VGA_GRN 151 GND
2 PD0 52 VSYNC 102 GND 152 CLK_SPCI
3 PD1 53 GND 103 VGA_RED 153 GND
4 PD2 54 DOCKED 104 GND 154 SAD0
5 PD3 55 USB_VD1+ 105 VGA_BLU 155 SAD1
6 PD4 56 USB_VD1- 106 DOCK_SD/MODE 156 SAD2
7 PD5 57 GND 107 D_IRTX 157 SAD3