FULS, have you got that personal message I've sent you a week ago?
Doing this I have noticed that there are two different versions of Donkey Kong which have different title screens and option screens. One has a Red Ball (crc 8af06275) on the option screen and the other has a jumping board (crc f2b76a27).
?!? In Atari800 both have red balls. Check if your emulator doesn't have the "Disable BASIC" option enabled. This function is usually realised by simulating pressing of the Option key for a few seconds after each reboot. However some games initialise so fast that this simulated Option key affects their title screen, like in this case.
I'm guessing one is the original released in 1983 and the other is the re-elease in 1988. Is this the case?
No, actually one of them has copy-protection code removed.
This time I've analysed the dumps more thoroughly; the result is attached in a form of an OpenDocument spreadsheet.
Using Atari800's builtin monitor and its ability to detect writes to memory, I was able to check which cartridges contain copy-protection code (that is, code that writes to a read-only memory area). Then I've analysed the ROM differences and came to an interesting conclusion. MOST of the differences in ROMs are caused by someone removing copy-protection code. Typically it is done by replacing the offending code with NOP, but there are also more complicated instances.
I don't know why there are so many unprotected images there. I supopse most if not all of them, were re-created from earlier file-based cracks.
For ROMs for which I am 100% sure that unprotecting was the reason for their modification, I've marked them with [cr]. However there are several pairs of ROMs that are cracked but also completely different (lots of relocated code) - so I'm not sure if these ROMs are indeed cracks or simply different revisions. Such ROMs I've marked with [cr?].
Glossary is included in the file's first sheet.