Applesauce FDC

[Chuck Guzis]

On 11/2/21 12:13 PM, dwight via cctalk wrote:
> The trickiest protection I've seen is where there is a hole punched
> through the disk on one track. The idea is that the protected program
> writes to that track and expects to see a failure to read that
> track.

There were more floppy protection schemes than you could shake a stick at:

https://diskpreservation.com/dp.php?pg=protection

The Apple II ones were interestingly devious, particularly the "spiral
track" one.

At any rate, lots of stories there, both in creation and defeating.


--Chuck