Hi!
Fabrizio wrote:
> So, as usual, I'd really love comments on all aspects of the game..
> playability, optimizations, improvements, etc.! :)
I think you could tweak the kernel, so that the playfield is displayed
with no flicker at all.
You could use my 47(!) pixel routine (with illegal opcode of course ;-)
and unroll the loop once. That should give you enough cycles for
setting the colors and en/disabling the ball. The only disadvantage
would be, that the ball would still flicker (one frame width 8 and
one frame width 4). I am not sure what will look better, but I think
it's worth a try.
Here is some not unrolled loop that should give you a good start:
ldy #HEIGHT
.digitLoop: ; @
lda (ballPtr),y ; 5 64
sta ENABL ; 3 67
lda (colPtr),y ; 5 72
sta COLUPF ; 3 75 <- replace with 2 x COLUPx every 2nd row
lda (ptr0),y ; 5 4
sta GRP0 ; 3 7
lda (ptr1),y ; 5 12
sta GRP1 ; 3 15
lda (ptr2),y ; 5 20
sta GRP0 ; 3 23
lax (ptr5),y ; 5 28
txs ; 2 30
lax (ptr3),y ; 5 35
lda (ptr4),y ; 5 40
stx GRP1 ; 3 43
sta GRP0 ; 3 46
tsx ; 2 48
stx GRP1 ; 3 51
sty GRP0 ; 3 54
dey ; 2 56
bne .digitLoop ; 2³ 59
(Un?)Fortunately I am on holiday for the next three weeks, starting at
mondy. So if you have questions ask them now or in three weeks. :-)
Have fun!
Thomas
_______________________________________________________
Thomas Jentzsch | *** Every bit is sacred ! ***
tjentzsch at web dot de |
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