Hi Fabrizio!
> So, any idea on saving up cycles in that function is
> welcome.. I'm willing to use Illegal/Undocumented
> opcodes too, if required!
Don't Panic!
Let me see...
> DEC ScanCount ; 5
> LDA ScanCount ; 3
> SEC ; 2
> SBC BallY ; 3
> ADC #BALL_HEIGHT; 2
> BCS DrawBall2 ; 2/3
> LDA #0 ; 2
> STA ENABL ; 3
> SLEEP 22
> JMP SkipDrawBall2 ; 3 47
> DrawBall2
So, here you are *jumping* to the branch that is already
the slower one!
Tada: If you'd swap both routines and jump to the quick
branch here, it should save you exactly one cycle! ;-)
Greetings,
Manuel
----------------------------------------------------------------------------------------------
Archives (includes files) at http://www.biglist.com/lists/stella/archives/
Unsub & more at http://www.biglist.com/lists/stella/
