Implement memory device

The memory device is fully implemented, with 3MB of heap memory.

This commit is a bit messy, additional changes are:
- The program memory and program counter in each Bedrock struct have
  been moved to a dedicated struct to prevent a name collision with the
  memory device
- The run_bg and debug functions have been moved to core.c and debug.c
- The blank screen colour has been changed back to black
- No second program runs on the sub screen by default
- The number of Bedrock instances to run has been parameterized

1 files changed, 1 insertions, 3 deletions

diff --git a/arm9/source/devices/screen.c b/arm9/source/devices/screen.c
index 492bb05..0d2fc36 100644
--- a/arm9/source/devices/screen.c
+++ b/arm9/source/devices/screen.c
@@ -52,8 +52,6 @@ void set_palette_low(ScreenDevice *scr, u8 low) {
     u8 r = scr->palette_write >>  7 & 0x1e;
     u8 g = scr->palette_write >>  3 & 0x1e;
     u8 b = scr->palette_write <<  1 & 0x1e;
-    // TODO: With 4-bit we multiply by 17, find equivalent
-    //       here to get best value of least-significant bit.
     scr->palette[i] = RGB15(r,g,b);
     scr->nds->pal[i] = RGB15(r,g,b);
 }
@@ -132,7 +130,7 @@ void flip_buffer(Screen *nds) {
 }
 
 void black_screen(Screen *nds) {
-    nds->pal[0] = RGB15(8,0,0);
+    nds->pal[0] = RGB15(0,0,0);
     dmaFillWords(0, nds->bgv, TILES_MEM);
     dmaFillWords(0, nds->fgv, TILES_MEM);
 }