HP Compaq dx7300 MT Reference Manual page 163

ATA/ATAPI (IDE) Standard Drive Cable
Pin Signal
1 Reset
2 Ground
3 DD7
4 DD8
5 DD6
6 DD9
7 DD5
8 DD10
9 DD4
10 DD1 1
1 1 DD3
12 DD12
13 DD2
14 DD13
CD-ROM 50-Pin Connector
Pin Signal
1 Audio L-ch
2 Audio R-ch
3 Audio GND
4
GND
5
RESET-
6 DD8
7 DD7
8 DD9
9 DD6
10 DD10
1 1 DD5
12 DD1 1
13 DD4
Service Reference Guide, dx7300
Connector
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
Connector
Pin Signal
14 DD12
15
DD3
16
DD13
17
DD2
18
DD14
19 DD1
20 DD15
21 DD0
22 DMARQ
23 GND
24 DIOR-
25 DIOW-
26 GND
43361 1-001
Pin Signal
29 DMAK
30 Ground
31 INTRQ
32 IOCS16
33 DA1
34 PDIAG (cable detect)
35 DA0
36 DA2
37 CS1FX
38 CS3FX
39 DASP
40 Ground
Pin Signal
27 IORDY
28 DMACK-
29 INTRQ
30 IOCS16-
31 DA1
32 PDIAG-
33 DAO
34 DA2
35 CS1FX-
36 CS3FX-
37 DASP-
38 +5V
39 +5V
Connector Pin Assignments
Pin Signal
40 +5V
41 +5V
42 +5V
43 GND
44 GND
45 GND
46 GND
47 CSEL
48 GND
49 Vendor-specific
50 Vendor-specific
A–5