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* checksums seem to apply to encrypted blocks. In the case of Ridge Racer, all-zero 0x200 blocks yield 0xE4 instead of Rayman3D's 0xB9. However, all-FF blocks always yield 0x0F since they aren't encrypted.
* checksums seem to apply to encrypted blocks. In the case of Ridge Racer, all-zero 0x200 blocks yield 0xE4 instead of Rayman3D's 0xB9. However, all-FF blocks always yield 0x0F since they aren't encrypted.
This is most likely a custom checksum algorithm. Standard CRC8 would yield zero for a zero block.
<del>This is most likely a custom checksum algorithm. Standard CRC8 would yield zero for a zero block.</del> Wrong. Checksums of zero blocks are actually equivalent to the checksum of the game's XOR key.
--[[User:Luigi2us|Luigi2us]] 19:59, 28 August 2011 (CEST)
--[[User:Luigi2us|Luigi2us]] 19:59, 28 August 2011 (CEST)