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23 pin D-SUB female connector layout
23 pin D-SUB female connector
Pin Name Dir Description
1/RDY<->Disk Ready
2/DKRD<--Disk Read Data
8/MTRXDOCDisk Motor Control
9/SEL2OCSelect Drive 2
10/DRESOCDisk Reset
11/CHNG<->Disk Removed From Drive-Latched Low
12+5V-->+5 Volts DC (250 mA max)
13/SIDE-->Select Disk Side (0=Upper, 1=Lower)
14/WPRO<->Disk is Write Protected
15/TKO<->Drive Head position over Track 0
16/DKWEOCDisk Write Enable
17/DKWDOCDisk Write Data
18/STEPOCStep the Head-Pulse, First low, then high
19DIROCSelect Head Direction (0=Inner, 1=Outer)
20/SEL3OCSelect Drive 3
21/SEL1OCSelect Drive 1
22/INDEXOCDisk Index Pulse
23+12V-->+12 Volts DC (160 mA max, 540 mA surge
According to 1 reports in our database (1 positive and 0 negative) the Amiga External Diskdrive pinout should be correct.

Is this pinout
Source(s) of this and additional information: Amiga 4000 User"s Guide from Commodore, from Hardware Book
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