2 Nov
2021
2 Nov
'21
12:58 p.m.
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