Posted By
Gaia
on 2003-01-09
|  Converting
I always fancied the idea of converting from C=64 but never really got to the point actually doing it... 
My first applicant would however be the C=64 version of Manic Miner, considering ours is 16kb only. AFAIK it also does not contain any sprites. BUT! How to begin??? Seeing the many folks who actually converted programs from C=64 one might first ask them what the best way is to convert a game? And I refer to detailed instructions on how to do it, what tools to use, etc. Common simulation code layers would also be cool (SID->TED routine, single sprite routine, etc.)
As we are in the PC area crossplatform tools would no doubt be the best and most efficient. So the steps to follow would look something like (all steps on PC of course):
1. unpack game code (if single file)
2. use a decent disassembler that can recognise object code properly, etc.
3. fix eventual mistakes (self-modifying code comes to mind...)
4. do the actual conversion with mapping c64 I/O registers to plus/4 ones
5. recompile it, this time for the plus/4
Looks simple, eh?  Now, the question is: what tools/programs one should use? And that's the real difficulty here, I guess... Any ideas?
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