Awhile back in 2009, PWRSTROKE and I put up some lists from somewhere online that had the checksum CRC numbers of chips.
http://newlifegames.net/nlg/index.php?topic=5645.0Looking at it, you can clearly see that SB160 and SB161 checksums are CAP1 and 15P6 respectively.
Using reverse disassembly, I tried to calculate a different, known good SB for example, SB149 for my Pinball Vision game.
If I were to calculate a checksum of a known good chip, then I should be able to use that same algorithm to verify the crc of the questionable SB161...see my line of thinking?
Sooo....according to the old DSV Lists, that crc of Pinball is CC99.
I am reading that chip with my HxD Hex Editor and I don't know how to get to that expected result?
When I use Checksum-16, I get 54C3.
When I use CRC-16, I get 8853.
Neither are close to the crc of CC99 from the old Lists.
They are using some sort of a custom algorithm to calculate their checksums.
Becauseof this, I cannot really verify anything.
I'm always running into brick walls here..
lol
Also, I tried to find the Decoded Text that you found on Line ce70.
I have my HxD set to Windows (ANSI)...what were you looking at the code with?