Subject: Re: Re: [stella] Climber 5 RC#03 From: Dennis Debro <ddebro@xxxxxxxxxxxxx> Date: Wed, 11 Feb 2004 7:22:48 -0500 |
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 ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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