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ESDI Hard drive

Type: 34-pin IDC/20-pin IDC

Control Connector

Pin Function Details
2 Head Sel 3
4 Head Sel 2
6 Write Gate
8 Config/Stat Data
10 Transfer Acknowledge
12 Attention
14 Head Sel 0
16 Sect/Add MK Found
18 Head Sel 1
20 Index
22 Ready
24 Transfer Request
26 Drive Sel 1
28 Drive Sel 2
30 Drive Sel 3
32 Read Gate
34 Command Data
All odd are ground

Data connector

Pin Function Details
1 Drive Selected
2 Sect/Add MK Found
3 Seek Complete
4 Address Mark Enable
5 (reserved, for step mode)
6 GND Ground
7 Write Clock+
8 Write Clock-
9 Cartridge Changed
10 Read Ref Clock+
11 Read Ref Clock-
12 GND Ground
13 NRZ Write Data+
14 NRZ Write Data-
15 GND Ground
16 GND Ground
17 NRZ Read Data+
18 NRZ Read Data-
19 GND Ground
20 GND Ground



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