@onfy probably error detection and correction? looks like a thing to do with ripping discs http://wiki.redump.org/index.php?title=PSX_Date_and_EDC_Check_on_Discs_with_Non-Standard_EXE
@noiob AFAIK it's DRM to help them detect incorrectly burned copies?
my problem is I'm evil and making a compilation disc so possibly not preserving any such protection. there's no obvious errors but the RNG in Tetris on my compilation disc feels more rude... which would be funny DRM.
@onfy ah yeah a standard cd burner would obviously correct any errors it comes across
@noiob many burners can do raw burning but you still need a program that supports it... but the main thing is I'm building my own cursed bin, if I was just burning a dump of the original disc it'd be easier.
@onfy ISOs won't contain the ECC data though, would they
@noiob of course they would. it'd be a rubbish dump if the images didn't contain an accurate, functioning copy of the game.
@onfy the CD standard has built-in error correction, or is that only audio? you obviously don't need that info to run the software, it's just for the drive to correct scratches
@noiob audio has error correction and data has extra correction
the trick is with Playstation discs is they hijack the correction codes to stuff more data into them.
this tool exists and seems to use ecc/edc to correct a rip https://github.com/saramibreak/EccEdc
this sounds like some disc have messed up error correction on purpose to slow down ripping https://forum.daemon-tools.cc/forum/copy-methods-questions-daemon-tools/general-copy-discussion/20248-