Computer buses and slots connectors pinouts
This specification makes it possible to share ATA & PC Card with the same connectors.
Pin Namel Host Dir Dev PC-Card equiv
1 Ground x --> x Ground
2 DD3 x <-> x D3
3 DD4 x <-> x D4
4 DD5 x <-> x D5
5 DD6 x <-> x D6
6 DD7 x <-> x D7
7 /CS0 x --> x /CE1
8     --> i A10
9 /SELATA x --> x /OE
10          
11 /CS1 x --> x 1) A9
12     --> i A8
13          
14          
15     --> i /WE
16 INTRQ x <-- x /READY:IREQ
17 VCC x --> x VCC
18          
19          
20          
21          
22     --> i A7
23     --> i A6
24     --> i A5
25     --> i A4
26     --> i A3
27 DA2 x --> x A2
28 DA1 x --> x A1
29 DA0 x --> x A0
30 DD0 x <-> x D0
31 DD1 x <-> x D1
32 DD2 x <-> x D2
33 /IOCS16 x <-- x /WP:IOIS16
34 Ground x --> x Ground
35 Ground x --> x Ground
36 /CD1 x <-- x /CD1
37 DD11 x <-> x D11
38 DD12 x <-> x D12
39 DD13 x <-> x D13
40 DD14 x <-> x D14
41 DD15 x <-> x D15
42 /CS1 x --> x 1) /CE2
43     <-- i /VS1
44 /DIOR x --> x /IORD
45 /DIOW x --> x /IOWR
46          
47          
48          
49          
50          
51 VCC x --> x VCC
52          
53          
54          
55 M/S- x --> x 2)  
56 CSEL x --> x 2)  
57     <-- i /VS2
58 /RESET x --> x RESET
59 IORDY o <-- x 3) /WAIT
60 DMARQ o <-- x 3) /INPACK
61 /DMACK o --> o /REG
62 /DASP x <-> x /BVD2:SPKR
63 /PDIAG x <-> x /BVD1:STSCHG
64 DD8 x <-> x D8
65 DD9 x <-> x D9
66 DD10 x <-> x D10
67 /CD2 x <-- x /CD2
68 Ground x --> x Ground

x = Required.
i = Ignored by host in ATA mode.
o = Optional.
nothing = Not connected.
1) Device shall support only one /CS1 signal pin.
2) Device shall support either /M/S or CSEL but not both.
3)

68 pin male connector layout
68 pin male connector
at the peripherals
68 pin female connector layout
68 pin female connector
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Source(s) of this and additional information: ATA-2 specifications, from Hardware Book
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