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289ed21140
Work around a dcache issue by preventing the game from doing something pointless. The game's DVD read function writes 0x87654321 to the entire read buffer and 0x12345678 to the last 4 bytes. It then calls DVDReadAsync() and without waiting for the read to complete at all, it checks if the last 4 bytes are still 0x12345678. If they are, then the game fails. The check always passes on console because DVDReadAsync() calls issueCommand(), which calls DCInvalidateRange(read_buffer) (dcbi). Dolphin cannot emulate this without an extremely significant performance hit.
