Editing Enhanced Small Disk Interface (section)

==Connector pinouts==

{| class="wikitable"
|+ ESDI 34-pin control connector pinout
|-
| GROUND || 1 || 2 || ~HD SLCT 3
|-
| GROUND || 3 || 4 || ~HD SLCT 2
|-
| GROUND || 5 || 6 || ~WRITE GATE
|-
| GROUND || 7 || 8 || ~CNFG/STATUS
|-
| GROUND || 9 || 10 || ~XFER ACK
|-
| GROUND || 11 || 12 || ~ATTENTION
|-
| GROUND || 13 || 14 || ~HD SLCT 0
|-
| Key (no pin) || 15 || 16 || ~SECTOR
|-
| GROUND || 17 || 18 || ~HD SLCT 1
|-
| GROUND || 19 || 20 || ~INDEX
|-
| GROUND || 21 || 22 || ~READY
|-
| GROUND || 23 || 24 || ~XFER REQ
|-
| GROUND || 25 || 26 || ~DRV SLCT 0
|-
| GROUND || 27 || 28 || ~DRV SLCT 1
|-
| GROUND || 29 || 30 || Reserved
|-
| GROUND || 31 || 32 || ~READ GATE
|-
| GROUND || 33 || 34 || ~CMD DATA
|}

{| class="wikitable"
|+ ESDI 20-pin data connector pinout
|-
| ~DRV SLCTD || 1 || 2 || ~SECTOR
|-
| ~CMD COMPL || 3 || 4 || ~ADDR MK EN
|-
| GROUND || 5 || 6 || GROUND
|-
| +WRITE CLK || 7 || 8 || −WRITE CLK
|-
| GROUND || 9 || 10 || +RD/REF CLK
|-
| −RD/REF CLK || 11 || 12 || GROUND
|-
| +NRZ WRITE || 13 || 14 || −NRZ WRITE
|-
| GROUND || 15 || 16 || GROUND
|-
| +NRZ READ || 17 || 18 || −NRZ READ
|-
| GROUND || 19 || 20 || ~INDEX
|}