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I don’t know if this still holds true but a very long time ago I read some information from, I believe it was the “hitmen” group, who released the ISO License patcher. Pressed CD’s were made with bad checksum values in the boot sector. You can read the ISO Data to your computer 100% but all consumer burners automatically write good checksums to sectors when it burns so the Backup is detected as not being an original. There were rumors of a certain burner that with a firmware hack could make a perfect working backup. As the years went on without hearing any more about it, I assumed it was indeed just a rumor.
If a checksum is the ONLY variable in the detection process you would think a firmware hack or some type of burner Modification to inject the proper boot data would have surfaced by now. I think there is probably more to it. Say a burner was hacked to burn the proper boot data, which shouldn’t be that hard of a MOD. Just a programmable micro controller like a PIC or Atmel to time the data stream and inject the code at the right time. Would a Burned CD with good boot data physically be able to boot? Is the data burned on a CDR in the exact physical location as the original? CDR’s are not laid out exactly like Pressed CD’s. CDR’s have laser calibration areas, media identifiers and things that tell the drives what media they are reading.
When a PS1 boots a CD, the first thing the drive controller does is bring the laser all the way in as close as it can physically go to the hub and then tries to read a CD. When a PS2 boot, it brings the laser all the way in but then jumps it ahead about 1/8th of an inch. It would seem the PS2 is capable of reading closer to the center of a disk than a PSX. I don’t know if this is for DVD media or what?
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