Posted By
Csabo
on 2005-04-23
10:49:44
|  Re: Upcoming Demo
Yes, if you want to have a main program running beside your IRQ, you have to save any registers you use. (If you only use A and X for example, it's enough to save those.) Also, you don't have to use the stack, it's very common to save the registers to a 16 bit address (lame) or a zeropage address (best for speed). If you don't have a main program, you don't have to worry about any of this though.
Remember, the source for LOD is Back is also released to the public, it has tons of effects and tricks, all fairly well commented.
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