Aw: Re: Aw: Aw: Re: Aw: Re: Re: [stella] Fortitude I Quadraside

Subject: Aw: Re: Aw: Aw: Re: Aw: Re: Re: [stella] Fortitude I Quadraside
From: cybergoth@xxxxxxxx
Date: Wed, 9 Jul 2003 15:10:15 +0200 (CEST)
Hi there!

> >(I think something like that does the starfield in Star Fire...)
> YOU THINK ?????
> Who programed that game ?  LOL
> --Happy_Dude

Ah, Ok. I was just too lazy to look it up for sure :-)

Here' the common part that every 2LK iteration of the Star Fire 
kernel does at the beginning:

;---------------------------------------------------------
NextLine
    STA WSYNC           ; Wait for horizontal sync
    STA HMOVE           ; Horizontal Movement

; Reset stack to RESBL
    TXA                 
    LDX #$1F
    TXS
    TAX                 

; Draw starfield
    LDY vline
    CPY yposBackup+2
    PHP
    CPY yposBackup+1
    PHP
    CPY yposBackup
    PHP
    LDA crosshair,Y
    STA PF2
;---------------------------------------------------------

That is some ~35 cycles out of the 2*76 available, which already completely handle both missiles, the ball and the PF ;-)

Greetings,
     Manuel


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