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, 7 insertions, 0 deletions

diff --git a/arm9/source/debug.h b/arm9/source/debug.h
new file mode 100644
index 0000000..36bfca3
--- /dev/null
+++ b/arm9/source/debug.h
@@ -0,0 +1,7 @@
+#ifndef DEBUG_H_
+    #define DEBUG_H_
+
+    void debug_stacks(Bedrock *br);
+    void debug_assert(Bedrock *br);
+
+#endif