devkitPro

Posted: **Fri Jul 23, 2010 8:01 am**

Sorry for double posting as my net time is kind of limited these days.

Video.h

typedef enum {
	VRAM_H_LCD                = 0,
	VRAM_H_SUB_BG             = 1,
	VRAM_H_SUB_BG_EXT_PALETTE = 2,
} VRAM_H_TYPE;

256 * 192 = 48kb

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Bank H                       0x06898000          0x0689FFFF          32KB  
Bank I                       0x068A0000          0x068A3FFF          16KB

Bank H is just 32 KB. Does it mean that bank I gets mapped to sub BG also?

I wanna map this as LCD since I want to do some per pixel stuff on the sub screen.

Also when I call:

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gluTexLoadPal();

Is the pallete loaded in vram bank E?

So far this is how I've been using the VRAM.

A = filled by two gltextures at 64 kb each so all of 128 kb is filled.

B = Some textures but still have a lot left.

C = Not used yet (only by consoledemoInit())

D = VRAM_D_SUB_SPRITE (But still lots of stuff free)

E = Unused but I'm not sure if glpalette uses it.

F, G, H, I = not used.

Thanks!

Posted: **Fri Jul 23, 2010 7:01 pm**

Why would VRAM_I get mapped to sub bg unless you told it to? I'm not sure what "just 32KB" has to do with it. There are separate controls for it just beneath the VRAM_H_TYPE enum you pasted.

It seems as if the libnds texture palette system is hardcoded to use VRAM_E. you can see that for yourself in http://devkitpro.svn.sourceforge.net/vi ... xt%2Fplain

Posted: **Sat Jul 24, 2010 2:12 am**

Well, since H is just 32 kb and I need 48kb for a full subscreen and I is 16kb...

But nevermind. The question has been answered. ;*)

devkitPro

Mapping Vram H to sub BG...

Mapping Vram H to sub BG...

Re: Mapping Vram H to sub BG...

Re: Mapping Vram H to sub BG...