Source: National Amiga Technical 4/2000
Amiga 2/3/4000's Regarding Their Internal Floppy Drives
For DF0: the device number must be set to DS0 on the drive and this must have the cable with the twist(4-6) in it.
For DF1: the drive number must be set to DS1 on the drive and this must have the section of cable that is not twisted.
If you have a DF1: in the machine you need to set these jumpers:
* Amiga 2000 J301 must be on.
* Amiga 3000D J351 must be shorted between 1-2.
* Amiga 3000T J351 must be shorted between 1-2.
* Amiga 4000:
DF1: ENABLE (J351) enable 2nd internal floppy (880 KB) as DF1: closed
DF1: ENABLE (J351) no 2nd internal floppy, or 1.76MB floppy as DF1: open
A2000 ---- jumper J301
Motherboard, cable,DF1 drive(set as DS1), cable with twist 4-6, DF0 (set as DS0).
- - x
- - x DS1 or DF1
- x -
- x - DS0 or DF0
