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ESDI

Enhanced Small Device Interface

2 Cables:

ESDI Interface Specifications

ESDI Control Cable (J1/P1) Pin assignments

(Disk Implementation - Serial Mode)

Signal pin Ground pin Signal name
02 01 -Head select 2(3)
04 03 -Head select 2(2)
06 05 -Write gate
08 07 -Configuration/status data
10 09 -Transfer acknowledge
12 11 -Attention
14 13 -Head select 2(0)
16 15 -Sector/byte clock/address mark found
18 17 -Head select 2(1)
20 19 -Index
22 21 -Ready
24 23 -Transfer request
26 25 -Drive select 2(0)
28 27 -Drive select 2(1)
30 29 -Drive select 2(2)
32 31 -Read gate
34 33 -Command data

ESDI Data Cable (J2/P2) Pin assignments

(Disk Implementation - Serial Mode)

Signal pin Ground pin Signal name
01 -Drive selected
02 -Sector/byte clock/address mark found
03 -Command complete
04 -Address mark enable
05 Ground
07/08 06 +/-Write clock
10/11 09/12 +/-Read ref* clock
13/14 15/16 +/-NRZ write data
17/18 19 +/-NRZ read data
20 -Index

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page modified: 19990314
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