Manuel Polik wrote:
> Changes:
> 1 - assimilated all of Thomas' superior knowledge and put it
> straight into the kernel
Well, you almost did, but i think it's my fault. I'll try to exlain my tip #3 by example.
In your code, you do something like:
nextLine:
TXA
CLC
SBC verPos
ADC #$13
TAY
BCC SkipDraw
LDA (playerpointer),Y
STA GRP0
...
DEX
BNE nextLine
What i meant is something like that:
tya
; CLC ; i think you already eliminated this
SBC verPos
ADC #$13
BCC SkipDraw
LDA (playerpointer),Y
STA GRP0
...
dey
BNE nextLine
Notice that i didn't change Y, i'm directly using the line counting value. You "just" have to change the pointer variables and realign your data ;-)
The example only saves 2 cylces (you're doing this twice), but it frees X for something else.
For your missile problem, i'd suggest the following trick, which can be found in the Combat listing:
ldx #ENAM1
txs
...
cpy M0line
php
cpy M1line
php
You can use this for the ball too.
Have fun
Thomas
_______________________________________________________
Thomas Jentzsch | *** Every bit is sacred ! ***
tjentzsch at web dot de |
______________________________________________________________________________
Die Fachpresse ist sich einig: WEB.DE 18mal Testsieger! Kostenlos E-Mail,
Fax, SMS, Verschlüsselung, POP3, WAP....testen Sie uns! http://freemail.web.de
-
Archives (includes files) at http://www.biglist.com/lists/stella/archives/
Unsub & more at http://www.biglist.com/lists/stella/
