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I seem to be having an issue with the BMI and BPL commands. For some reason, it is calculating incorrectly... My routine is: LDA BadGuy1X,x CMP HeroX BEQ SecondDirectionCheck ;; If he is at hero's X position, don't move, the hero will bounce back anyway... BMI SetHimRight DEC BadGuy1X,x JMP SecondDi...

Personally I wouldn't use any of the old sources (that I have seen) to try to learn anything. Short/obscure symbol names, next to no comments, tons of magic numeric constants -- all of the sources seem to show the same pattern. :) BTW, for those not in the know, Gil Galad's site has full source cod...

This is indeed quite interesting, and will likely teach me something, which is good because I could really use an advanced course in NES assembly!

Thank you for your responses, Kasumi and tokumaru. I was able to get the correct number using this routine with your help: LDX #$05 shiftLoop: LDA collisionLo ASL A STA collisionLo LDA collisionHi ROL A STA collisionHi DEX BNE shiftLoop LDA collisionHi CLC ADC #$20 STA collisionHi Adding the "R...

Hi folks! I'm in the process of writing my own homebrew game and implementing collision detection has been a troublesome task, as I am stuck at an error that seems to have no explanation and figured this would be the right forum to ask. The data I am working with is an entire uncompressed screen (we...