Dell Inspiron 4000 Service 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.
Pin Signal
1 STB#
2 D0
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
Docking Connector
Use this connector to attach your computer to the optional port replicator.
Pin Signal
1 STRB#/5V
2 PD0
3 PD1
4 PD2
5 PD3
6 PD4
7 PD5
I/O Definition
I/O Strobe
I/O Printer data bit 0
I/O Printer data bit 1
I/O Printer data bit 2
I/O Printer data bit 3
I/O Printer data bit 4
I/O Printer data bit 5
I/O Printer data bit 6
I/O Printer 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 Ground signal
N/A Frame ground
Pin Signal Pin
51 HSYNC 101
52 VSYNC 102
53 GND 103
54 DOCKED 104
55 USB_VD1+ 105
56 USB_VD1- 106
57 GND 107
Signal Pin
VGA_GRN 151
GND 152
VGA_RED 153
GND 154
VGA_BLU 155
DOCK_SD/MODE 156
D_IRTX 157
Signal
GND
CLK_SPCI
GND
SAD0
SAD1
SAD2
SAD3