Kernel Timing Problem in my Hack (QuadraTank)

[starfighter1314]

Hello,

 

I posted this in the Hacks forum, but haven't heard anything. Maybe someone in here can help. I am having a timing problem in my Combat hack. When all 4 paddles are rotated counter-clockwise, the whole playfield shifts downward a couple of scanlines. I haven't been able to pinpoint the problem, but it only happens when all 4 paddles are in that zone. Any ideas?

 

thanks in advance,

-s

Edited April 20, 2007 by starfighter1314

[Thomas Jentzsch]

Reading the pods takes too long in worst case.

 

Optimizing the slowest execution path may help:

 	LDX #$08
LDA  INPT0;3
BPL  PotNot00; 2 or 3
STX  POT0;3
PotNot00
LDA  INPT1
BPL  PotNot01
STX  POT1
PotNot01
LDA  INPT2
BPL  PotNot02
STX  POT2
PotNot02
LDA  INPT3
BPL  PotNot04
STX  POT3	
PotNot04
JMP  PotNot3; 3

Do the same with SecondFrame code. This saves 6 cycles, which should be enough.

Edited October 30, 2006 by Thomas Jentzsch

[starfighter1314]

Thanks! That did the trick.