Comparing variables to each other

[+atari2600land]

I want to see if a variable has reached the value of another variable. How do I do this? This code won't work:

 

        ldy TongueYMoving
        iny
        sty TongueYMoving

        ldx ScreenDrawing
        cpx #TongueYMoving
        beq DisableBall

[carlsson]

Skip the # as it indicates an immediate value, not a memory location.

 

 

  inc TongueYMoving
  ldx ScreenDrawing
  cpx TongueYMoving
  beq DisableBall ; branch if the two are equal

 

You might want another branch instruction depending on which circumstances the branch should occur.

[+atari2600land]

OK. Thank you. I was about to say it didn't work, but then I got the other surrounding code changed and it does what I want it to now.