Dell Inspiron 8100 - Manual (Page 7)

PS/2 Connector
USB Connectors
S-Video TV-Out Connector
6 PD4/DSKCHG# 16 INIT#/DIR#
7 PD5F 17 SLCT_IN#STEP#
8 PD6F 18-23 GND
9 PD7F 24 NC
10 ACK#/DRV# 25 GND
Pin Signal
1 DAT_KBD
2 DAT_SM1
3 GND
4 PS2VCC
5 CLK_KBD
6 CLK_SM1
Shell N/A
Pin Signal
1 VCC
2 – Data
3 +Data
4 Ground