How Floppy Disk Copy Protection Worked
8.1 هزار بار بازدید -
3 سال پیش
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I take a look at
I take a look at some of the copy protection methods used to prevent floppy disk duplicates from working. Heard of weak/flaky bits? This is far from a comprehensive list, but these are some of the most common and most interesting. I've also included simulations so you can see how they work.
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Chapters
Intro (00:00)
Background(00:54)
Non-Standard Disk Formats (01:40)
Invalid Checksums/CRCs (02:07)
Hidden Data (02:22)
Summary of Basic Methods (02:47)
Bad Sectors (02:58)
Index/Offset Data Alignment (03:35)
Disk Visualisation Simulator Introduction (04:09)
Long Tracks (05:21)
Unformatted/Random Areas (06:09)
Sector Timing Variations (06:39)
Weak/Flaky Bits (07:20)
Summary (08:59)
Video:
"Don't copy that floppy" video by SIIA (formerly Software Publishers Association), 1992.
Full video: • Don't Copy That Floppy!
Music:
rotate picture by rush
copyking by Jonte
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#copyprotection #floppydisk #weakbits #piracy
3 سال پیش
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