Posted By
Csabo
on 2008-11-10
09:39:36
|  Re: Skramble help
If you had the proper cables, that conversion would be unnecessary.
However, if you really want to look into it deeper, there's something we could try. I wrote a small routine that calculates a simple check sum for every 256 bytes. If we're lucky, the conversion only altered a few bytes and we can find out where it is this way. After you loaded the game, go to monitor, and type:
>130 a0 00 84 d0 a2 10 86 d1
>138 a9 20 20 d2 ff 98 51 d0
>140 c8 d0 fb 20 10 fb e8 e0
>148 40 d0 eb 4c 45 f4
G 130
This will print out all the check sums. Here are the correct ones for comparison:
a8 39 e4 50 a3 db 53 c2 fb 72 12 da de 51 a9 d3
d2 15 65 5c 34 66 5e 5e 05 d0 0f 03 33 d7 4e 52
c1 c7 07 25 f5 41 08 b9 3f df 95 ef fe f2 ad ff
You can also just visually compare the memory of the game in the emulator (type M1000 in monitor after loading) and on the real machine. If it looks very different, then definitely something has gone wrote. If it's the same, maybe we can track down where's the problem. Let me know how it goes 
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