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Main - SMW Hacking - SMW HDMA Madness New thread | New reply


boingboingsplat
Posted on 02-21-09 06:53 AM Link | Quote | ID: 101550


Giant Koopa
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Since: 07-23-07
From: Michicola

Last post: 4850 days
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I'm coding some HDMA without any kit, and I can't for the life of me figure out how to use $2121 and $2122 to change the backdrop color without affecting layer 2.



I've messed with CGADSUP in practically every conceivable bit combination that would make sense. I've tried turning off the subscreen color math blackhole89 told me about ($2130 bit 1) but to no avail. Will I have to resort to some sort of kit? This is driving me insane.

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Smallhacker
Posted on 02-21-09 07:23 PM Link | Quote | ID: 101585


Panser
Swedish weirdo times eleven

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Since: 02-19-07
From: Stockholm, Sweden

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Last view: 5192 days 		SMW uses the Fixed Color Data register for its background colors. Write the new colors to it.

Some info from some random page I found on Google: 

2132  wb+++- COLDATA - Fixed Color Data
        bgrccccc

        b/g/r = Which color plane(s) to set the intensity for.
        ccccc = Color intensity.

        So basically, to set an orange you'd do something along the lines of:
            LDA #$3f
            STA $2132
            LDA #$4f
            STA $2132
            LDA #$80
            STA $2132


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boingboingsplat
Posted on 02-21-09 11:48 PM (rev. 3 of 02-23-09 03:12 AM) Link | Quote | ID: 101600


Giant Koopa
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Since: 07-23-07
From: Michicola

Last post: 4850 days
Last view: 4813 days
I have that same document, I'll try that instead later. Seems a bit harder to work with, however.

Edit: Ok, so using that address works... almost. Now I'm having trouble actually getting it to apply on a per-scanline basis.

Edit2: Nevermind! Success! I actually managed to figure it out by looking at the tables of d4s' kit. They were just the HDMA data, so it wasn't that much of a stretch. Here's a pic:



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Main - SMW Hacking - SMW HDMA Madness New thread | New reply

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