chris.c

#include <string.h>

#include <toolbox.h>
#include "page_pic.h"

void load_gfx()
{
    int ii;
    // (1) Because my bitmaps here don't fit the  screen size, 
    // I'll have to load them one scanlline at a time
    for(ii=0; ii<16; ii++)
    {
        memcpy(&vid_mem_front[ii*120], &frontBitmap[ii*144/4], 144);
        memcpy(&vid_mem_back[ii*120], &backBitmap[ii*144/4], 144);
    }

    // (2) You don't have to do everything with memcpy.
    // In fact, for small blocks it might be better if you didn't.
    // Just mind your types, though. No sense in copying from a 32bit 
    // array to a 16bit one.
    u32 *dst= (u32*)pal_bg_mem;
    for(ii=0; ii<8; ii++)
        dst[ii]= frontPal[ii];
}

int main()
{
    int ii=0;

    load_gfx();
    // Set video mode to 4 (8bpp, 2 pages)
    REG_DISPCNT= DCNT_MODE4 | DCNT_BG2;

    while(1)
    {
        while(KEY_DOWN_NOW(KEY_START)); // pause with start
        vid_vsync();

        // (3) Count 60 frames, then flip pages
        if(++ii == 60)
        {   
            ii=0;   
            vid_flip(); 
        }
    }
    return 0;
}