Massive rewrite

This commit rewrites the emulator halfway from scratch to make it
easier to change and maintain in the future. The emulator core was
rewritten to adhere to the released Bedrock specification (earlier
versions implemented an older prototype specification, which is no
longer relevant).

This commit also adds proper support for running multiple concurrent
Bedrock instances. This was previously supported in a limited manner
for the on-screen keyboard, but now works for any regular program as
well, with switching being performed by pressing the L or R bumper
buttons. This is disabled by default, as programs will still need to
be baked into the emulator and hand-loaded.

1 files changed, 10 insertions, 8 deletions

diff --git a/arm9/source/types/circbuf.h b/arm9/source/types/circbuf.h
index 305f8bf..15b3b63 100644
--- a/arm9/source/types/circbuf.h
+++ b/arm9/source/types/circbuf.h
@@ -1,16 +1,18 @@
-#include <nds.h>
-
 #ifndef CIRCBUF_H_
     #define CIRCBUF_H_
 
+    #include "../bang.h"
+
+
+    // A 256-byte circular buffer.
     typedef struct {
         u8 mem[256];
-        u8 front;      // start of buffer, read from here until back
-        u8 back;       // end of buffer, write past here until front
+        u8 front;      // start of buffer, read from here up to back
+        u8 back;       // end of buffer, write past here up to front
     } CircBuf;
 
-    u8 cb_read_byte(CircBuf *buf);
-    void cb_write_byte(CircBuf *buf, u8 byte);
-    void cb_clear(CircBuf *buf);
-
+    // Methods.
+    u8 circbuf_read(CircBuf *buf);
+    void circbuf_write(CircBuf *buf, u8 byte);
+    void circbuf_clear(CircBuf *buf);
 #endif