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I don’t believe DVD checks are intended to tell the laser hardware what media type it’s using. It already knows the media type or the code with the DVD check would not have loaded to begin with. It’s just software protection. The question is do CD games have CD media detection. Unlicensed free software such as PGEN and PS2Reality can be burned on either CD-R or DVD-R without modifying any code because there is no protection of any kind in this software. There is a BUG currently with PGEN for DVD file system that should be fixed in the next version. To quote the programmer “There are no media checks in PGEN10B.ELF. Why would homebrew software have media checks?”.
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