At 21.02.2001, 15:41, Andrew Davie wrote:
> Sometimes you just have to go backwards to go any further forwards.
I remember doing that more than once... ;-)
> I'VE SAVED ***** 500 ***** BYTES OF ROM!
Congratulations! That's the "Art of Coding" for the
2600 :)
> ;--------------------------
> ; SPRITE DRAW
> tya ; 2
> sec ; 2
> sbc SpriteEnd ; 3
> adc #SPRITE_HEIGHT ; 2
> bcs .Draw ; 2(3)
> nop ; 2
> nop ; 2
> sec ; 2
> bcs .skipDraw ; 3
> .Draw
> lda (Sprite),y ; 5
> sta PLAYER0SHAPE ; 3
> .skipDraw
> ;-->18 cycles used
> ;--------------------------
If you move the part, where you're not drawing, outside
the main kernel, you could save another cycle here.
(also see Manuel's kernel)
> Thanks once again to Thomas for the suggestion which left me practically
> without sleep for two days.
Well, I remember nearly sleepless nights, too!
> But still, it was a good one. The new kernal
> is very neat-and-tidy. Unfortunately, the new kernal simply isn't capable
> of the nifty colour changes (for the player) which I had just installed in
> the old one. C'est la vie. I don't miss it so much - and the ROM saving
> makes me smile everytime I think of it.
There a still some free cycles, so there is a chance to
get this feature (which I liked very much!) back.
And you could save a LOT of cycles, if you'd stop using
subroutine calls for your kernel.
> Regarding Thomas's suggestion about the scoring (or bug), I don't agree - if
> you only got a point every time you moved a cube to the correct place, and
> lost it when you moved it away... that would set the actual score for each
> screen (for cubes) to the number of cubes * points/cube. I want to
> encourage the player to 'cheat' by trying to build up scores by putting
> cubes on/off the correct places. Besides, the bonus is counting down like a
> whirlwind anyway... there's little point lazying around.
I still disagree, but it's your game and your choice :)
What do other people of the list think about it?
> I've copied this email to Thomas directly...
Thanks, now i got two copies of your mail :) Part of
the problem seems to have been only temporary.
> Thomas did you get my suggestion for your cursor?
Yes, thank you, i did.
Unfortunately I can't use it, if I want to keep my
kernel small and single lined.
Have fun!
Thomas
_______________________________________________________
Thomas Jentzsch | *** Every bit is sacred ! ***
tjentzsch at web dot de |
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