Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!ames!decwrl!ucbvax!pro-grouch.cts.com!rond
From: rond@pro-grouch.cts.com (Ron Dippold)
Newsgroups: comp.sys.apple2
Subject: Re: 3200 file format standard (NO REVERSED PALETTES!)
Message-ID: <3649.apple.net2@pro-grouch>
Date: 4 Aug 90 04:55:51 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: world
Organization: The Internet
Lines: 35

In-Reply-To: message from toddpw@tybalt.caltech.edu

> While I'm hot and hack-righteous, let me issue an open challenge to 
> anyone: convince me why the palettes have to be stored in a convoluted 
> manner in the first place. I will be perfectly happy to talk assembly. 
 
I don't see where I'll need to do that.  I have to build the code anyway to
change the pallettes on the fly, which involves creating code that looks sort
of like:
  TOP:  lda $c005
        LONGX
        ldx #$9ffe
        txs
        pea 1234
        pea 2345
        ...          ; push rest of 8 pallettes
                     ; wait till scan line is in those 8 pallettes
        pea 3534
        pea 1233  
        ...          ; push rest of other 8 pallettes.
        ^^^          ; do this until we reach the bottom of the screen 
                     ;  then we have lots of time to do other stuff
                     ;  during the VBL.  This give plenty of time for
                     ;  animation.
       JMP top


The point being that you have to build the code in advance to switch the
pallettes, so that when you are building it, you can load the pallettes any
damn way you please.

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