Hi there,
> > LDA affects the N and Z flags, so you can do BMI / BPL as well as BNE
> > BEQ, but I have never seen where it affects the carry.
>
> Hm... because it doesn't change the carry. Did the original code branch
> according to the carry state?
Yes it did. The original was...
.checkObstacleCollision
ldx obstacleType ; get the obstacle type
cpx #$04 ; see if the obstacle is harmful to the climber
lda CXPPMM ; read the player collisions
bpl .overscanWait ; if no collisions then jump to the big wait
bcs .playerGirderCollision
Either way I like the new one because it reads better.
Take care,
Dennis
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