Pitfall II Beta? in Atari 2600 Posted November 25 Even without considering the RNG bytes at the end, I'd still think it's a bad dump because of the one byte (actually just one bit) difference in bank 0, which causes the gfx glitch when falling into a pit. I find unlikely that it would have made it into a review copy without being noticed before. Interestingly, there are also 4 bytes that differ at the start of bank 1 (address $1000 in the binary): the beta contains the sequence "78 4c 81 fb" there, while in the release is all 'ff'. That byte sequence is the code SEI JMP $F081 Anyway, the VCS can never access that area of the rom, as the DPC registers are mapped there. And any difference there can be caused by the method used to dump the game. The code is maybe a leftover from the development system?