RobSmithDev | How Floppy Disk Copy Protection Worked @RobSmithDev | Uploaded February 2022 | Updated October 2024, 1 hour ago.
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.
Previous video: youtube.com/watch?v=OAswAoNLJhs
Try the Floppy Disk Simulator: robsmithdev.co.uk/floppysimulator
If you want to support my channel then consider becoming a Patreon!
Patreon: patreon.com/RobSmithDev
Discord: discord.gg/MKZ6HA6ZWE
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: youtube.com/watch?v=DumqRAsLVvE
Music:
rotate picture by rush
copyking by Jonte
Copyright © RobSmithDev 2021-2022
robsmithdev.co.uk
Where appropriate, all efforts were made to trace & obtain copyright
holders permissions to reproduce their material in this video.
If you have any questions regarding content please get in touch.
#copyprotection #floppydisk #weakbits #piracy
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.
Previous video: youtube.com/watch?v=OAswAoNLJhs
Try the Floppy Disk Simulator: robsmithdev.co.uk/floppysimulator
If you want to support my channel then consider becoming a Patreon!
Patreon: patreon.com/RobSmithDev
Discord: discord.gg/MKZ6HA6ZWE
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: youtube.com/watch?v=DumqRAsLVvE
Music:
rotate picture by rush
copyking by Jonte
Copyright © RobSmithDev 2021-2022
robsmithdev.co.uk
Where appropriate, all efforts were made to trace & obtain copyright
holders permissions to reproduce their material in this video.
If you have any questions regarding content please get in touch.
#copyprotection #floppydisk #weakbits #piracy
