Compaq Deskpro 2000 Service & Reference Manual page 56

Connector
39
40
Pin Signal
1 RESET
2 GROUND
3 DD7
4 DD8
5 DD6
6 DD9
7 DD5
8 DD10
9 DD4
10 DD11
11 DD3
12 DD12
13 DD2
14 DD13
A-6 Connector Pin Assignments
IDE/EIDE Drive Cable
1
2
Pin Signal
15 DD1
16 DD14
17 DD0
18 DD15
19 GROUND
20 (KEY)
21 DMARQ
22 GROUND
23 DIOW
24 Ground
25 DIOR
26 GROUND
27 IORDY
28 CSEL
Pin Signal
29 DMAK
30 GROUND
31 INTRQ
32 IOCS16
33 DA1
34 PDIAG (80-pin cable detect)
35 DA0
36 DA2
37 CS1FX
38 CS3FX
39 DASP
40 GROUND