PCI/ISA System Board
Pin
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
Function
Dir
Ground
Step
Ground
Write Data
Ground
Write Gate
Ground
Track 0
MSEN
Wr Protect
Ground
Read Data
Ground
Head Select
Ground
Disk Change
1st IDE
Primary IDE Hard Disk Drive Connector
Pin
1
2
3
4
5
6
7
8
9
Function
-Reset
Ground
D7
D8
D6
D9
D5
D10
D4
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