## Notes about the unofficial IPF floppy disk images

As of March 1, 2025 the IPF disk image format cannot properly store the special flux timing pattern of the Dungeon Master and Chaos Strikes Back copy protection sector. That is why there are no official IPF disk images of these games yet (except for Dungeon Master for Amiga version 3.6 which is not copy protected).

The disk-analyse program from [Keirf's Disk Utilities](https://github.com/keirf/disk-utilities) has a built-in 'hack' to detect that special copy protection and can produce unofficial IPF images.

These IPF images however use a workaround trick that works fine in emulators and is enough to fool the game, but they cannot be written back to a physical floppy disk.
Instead of reproducing the special flux timing pattern, disk-analyse uses very short weak regions (1-2 bitcell) to simulate the fuzzy most-significant bit in some data bytes in the protection sector.
The game checks that at least some of these bits are random across multiple readings, and ignores what causes that randomness.


## Sample command lines to create IPF images:

### Dungeon Master
If you place Kryoflux raw files named DungeonMaster00.0.raw to DungeonMaster83.1.raw in folder named /data/DM
disk-analyse -f"Dungeon Master" "/data/DM/DungeonMaster" "/data/DM/DungeonMaster.ipf"

### Chaos Strikes Back
If you place Kryoflux raw files named ChaosStrikesBack00.0.raw to ChaosStrikesBack83.1.raw in folder named /data/CSB
disk-analyse -f"Chaos Strikes Back" "/data/CSB/ChaosStrikesBack" "/data/CSB/ChaosStrikesBack.ipf"
