gbadev.org forum archive

The palette is loading correctly but, The sub screen bg is using the sub screen palette instead of the extended one... I am using

Code:

REG_BG1CNT_SUB ^= BG_PALETTE_SLOT1;

For editing the registers and telling it to use the palette accordingly... to no avail...

Googling, tutorials only explain for main screen... I know the process should be similar... but I can't find what I'm missing...

XOR Operator?
_________________
"We are merely sprites that dance at the beck and call of our button pressing overlord."

Yeah, that was the one being used in some examples I found... I tested with OR and it gives the same results though... however, I don't know in the long run which is the correct one, I guess I'll stick with XOR...

and still, the subscreen uses default sub screen palette, instead of the extended sub palette 1... I tried disabling the console, and leaving just that background... all I got was a black screen because the palette was not loaded...

All the palettes in the main screen work correctly, and still I can't find what I'm missing...

My initVideo()

Code:

vramSetMainBanks(VRAM_A_MAIN_BG_0x06000000,
VRAM_B_MAIN_BG_0x06020000,
VRAM_C_SUB_BG_0x06200000,
VRAM_D_LCD);

/* Set the video mode on the main screen. */
videoSetMode(MODE_0_2D |
         DISPLAY_BG0_ACTIVE |
DISPLAY_BG1_ACTIVE |
         DISPLAY_BG2_ACTIVE |
         DISPLAY_BG3_ACTIVE); //Enable BG3 for display

/* Set the video mode on the sub screen. */
videoSetModeSub(MODE_0_2D|
DISPLAY_BG0_ACTIVE |
DISPLAY_BG1_ACTIVE |
         DISPLAY_BG2_ACTIVE |
         DISPLAY_BG3_ACTIVE); //Enable BG3 for display
vramSetBankE(VRAM_E_LCD);
vramSetBankH(VRAM_H_LCD);
REG_DISPCNT|= DISPLAY_BG_EXT_PALETTE;

My load Palette

Code:

if(main){
      vramSetBankE(VRAM_E_LCD);
      memcpy(VRAM_E_EXT_PALETTE[number], /* screen palette*/
                  buffer, size);
      VRAM_E_CR = VRAM_ENABLE | VRAM_E_BG_EXT_PALETTE;
      switch(number){
         case 3:
            REG_BG3CNT ^= BG_PALETTE_SLOT3;
            break;
         case 2:
            REG_BG2CNT ^= BG_PALETTE_SLOT2;
            break;
         case 1:
            REG_BG1CNT ^= BG_PALETTE_SLOT1;
            break;
         case 0:
            REG_BG0CNT ^= BG_PALETTE_SLOT0;
            break;
      }
   }else{
      vramSetBankH(VRAM_H_LCD);
      memcpy(VRAM_H_EXT_PALETTE[number], /* screen palette*/
                  buffer, size);;
      VRAM_H_CR = VRAM_ENABLE | VRAM_H_SUB_BG_EXT_PALETTE;
      REG_BG1CNT_SUB ^= BG_PALETTE_SLOT1;
      switch(number){
         case 3:
            REG_BG3CNT_SUB ^= BG_PALETTE_SLOT3;
            break;
         case 2:
            REG_BG2CNT_SUB ^= BG_PALETTE_SLOT2;
            break;
         case 1:
            REG_BG1CNT_SUB ^= BG_PALETTE_SLOT1;
            break;
         case 0:
            REG_BG0CNT_SUB ^= BG_PALETTE_SLOT0;
            break;
      }

Fixed

Code:

I set

Code:

REG_DISPCNT|= DISPLAY_BG_EXT_PALETTE;

and thought it was for both screens... but now it's fixed with the videoSetModeSub

gbadev.org forum archive

DS development > Help: Subscreen bgs using extended mode

#166701 - Emmanuel - Sun Feb 15, 2009 11:33 am

#166719 - Dwedit - Sun Feb 15, 2009 9:40 pm

#166744 - Emmanuel - Mon Feb 16, 2009 12:54 pm