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Bilto · 28-06-2002

Does anyone know what happens when a CD contains invalid channel bit sequences which don't match a sequence in the FEM table? Maybe a sequence can be tailored to cause an overload in the chipset, and reset the drive? What if you had 17 1's in a row? Surely the drive would freak out? (maybe that's why PSX's are always dying???)

Do you think we'll ever see a burner that will allow us to send 14 (or 17) bits to the drive instead of 8? Could an existing chipset handle this? I doubt it.

Perhaps these are characteristics of PSX discs? Maybe a PSX or PS2 starts to read a disc, gets it's country code (well understood and documented) and then it expects the drive to suddenly panic. Can the drive be restarted and sent directly to an area beyond the error?

Can a PC even read the protection from PSX discs? Does anyone really know what's happening there? I know the Bleem authors thought they had identified the protection used but then they were proven wrong as they had picked up on a characteristically flawed EDC near the start of every disk, but later Sony started producing discs with valid EDC in the same area and of course they were still protected.

Does anyone know all the answers? Spath?

28-06-2002	#28 (permalink)
Bilto CD Freaks Junior Member Join Date: May 2002 Location: Scotland Posts: 99	Does anyone know what happens when a CD contains invalid channel bit sequences which don't match a sequence in the FEM table? Maybe a sequence can be tailored to cause an overload in the chipset, and reset the drive? What if you had 17 1's in a row? Surely the drive would freak out? (maybe that's why PSX's are always dying???) Do you think we'll ever see a burner that will allow us to send 14 (or 17) bits to the drive instead of 8? Could an existing chipset handle this? I doubt it. Perhaps these are characteristics of PSX discs? Maybe a PSX or PS2 starts to read a disc, gets it's country code (well understood and documented) and then it expects the drive to suddenly panic. Can the drive be restarted and sent directly to an area beyond the error? Can a PC even read the protection from PSX discs? Does anyone really know what's happening there? I know the Bleem authors thought they had identified the protection used but then they were proven wrong as they had picked up on a characteristically flawed EDC near the start of every disk, but later Sony started producing discs with valid EDC in the same area and of course they were still protected. Does anyone know all the answers? Spath?