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, 7 insertions, 3 deletions

diff --git a/arm9/source/types/circbuf.c b/arm9/source/types/circbuf.c
index 532a5a0..0398254 100644
--- a/arm9/source/types/circbuf.c
+++ b/arm9/source/types/circbuf.c
@@ -1,6 +1,8 @@
 #include "circbuf.h"
 
-u8 cb_read_byte(CircBuf *buf) {
+
+// Read a byte from a circular buffer, or zero if the buffer is empty.
+u8 circbuf_read(CircBuf *buf) {
     if (buf->front != buf->back) {
         return buf->mem[buf->front++];
     } else {
@@ -8,13 +10,15 @@ u8 cb_read_byte(CircBuf *buf) {
     }
 }
 
-void cb_write_byte(CircBuf *buf, u8 byte) {
+// Write a byte to a circular buffer if the buffer is not full.
+void circbuf_write(CircBuf *buf, u8 byte) {
     if (((buf->back+1)&0xff) != buf->front) {
         buf->mem[buf->back++] = byte;
     }
 }
 
-void cb_clear(CircBuf *buf) {
+// Clear a circular buffer.
+void circbuf_clear(CircBuf *buf) {
     buf->front = 0;
     buf->back = 0;
 }