Presented here is a simple circuit that allows PC floppy disk drives to be used with the Amiga computer. This design only supports double density disks. You can fit a high density drive and use it with double density disks without problems.
The design has been tested using Workbench Format/Copy, Xcopy, Sanity Arte Demo, Spaceballs 9 Fingers Demo, State of the Art Demo, RSI Megademo and numerous trackloader based games.
The design also allows you to fit the unit in place of an Escom A1200 floppy drive, which will restore support for trackloader based games and demos with a simple no solder modification.
Schematics and PCB files are online if you want to make your own unit, I also sell assembled units or kits.
V1 Design information
The design is simple, it swaps connects Diskchange from pin 34 of the PC drive to pin 2 of the Amiga. It generates the nREADY signal based on the nSEL0 signal and nINDEX, which signals to the Amiga that the drive is ready for access.
The schematic is available here (click to enlarge):
The PCB is shown here (click to enlarge)
Finally, you can download the Eagle CAD files and Gerbers here, Floppy.zip 67K
The assembled units look like this
Component side of PCB.
Underside of PCB
Connected to a disk drive
Testing the unit
I have tested the unit with the following un-modified disk drives
and Sony TBC
Purchasing assembled units or kits
User manual and installation instructions
Updated 14 April 2021