A4000 Floppy (and other Drives) Question

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PC floppy can easily be made to reliably work as DD (just swap a few wires).
To make it work as HD you need to do some serious hacking, its all on aminet hard/hack. (But it seems that those hacks are buggy, not reliable.. as docs say)

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First have a look at pinouts:
amiga floppy pinout ext/int

PC floppy

it should take a little time to figure which wires to switch, just remember all PC floppys are factory made as "DS1", i.e. DF1: or B: if cable is not twisted, so for eg. IIRC you should connect DriveSel0 from computer to DriveSel1 on floppy. Also need to switch diskchange signal to appropriate pin. Last thing, if you want nonDOS games to work you need a single diode to get RDY signal (easy way, there are more elaborate solutions, look at links).  I cant remember orientation atm, will tell you later, if you need it
related aminet links:

DD:
PcF2AmF.lha (easy way)

informative, but not necessary:
floppyinterfac.lha
FDDx2toInt.lha
A1200FDfix.lha
AT1200mod.lha
DriveSolution.lha


As for HD:

drv-1.44.lha
PCFloppy2Amiga.lha
.. maybe I missed some.

I never did try HD modification, you need to slow down drive from 300rpm to 150.. etc
Let me know if you manage to get HD working.