more decomping and some data dumping

1 files changed, 65 insertions, 0 deletions

diff --git a/src/code_800D090.c b/src/code_800D090.c
new file mode 100644
index 0000000..1031a2d
--- /dev/null
+++ b/src/code_800D090.c
@@ -0,0 +1,65 @@
+#include "global.h"
+
+extern void SoundBiasReset(void);
+extern void SoundBiasSet(void);
+
+void Hang(void)
+{
+    while(1)
+    {
+        asm("swi 0x2");
+    }
+}
+
+
+// Unused
+void sub_800D098(void)
+{
+    u32 dispcnt_save;
+    u32 ie_store;
+
+    while(REG_VCOUNT <= 159)
+        ;
+
+    // Save DISPCNT and set to 0
+    dispcnt_save = REG_DISPCNT;
+    REG_DISPCNT = 0;
+
+    *(u16 *)BG_PLTT = 0xefff;
+
+    while(REG_KEYINPUT != 0x3ff) // 0011 1111 1111 (all buttons)
+        ;
+
+
+    REG_IME = 0;
+
+    // Save IE Register
+    ie_store = REG_IE;
+    REG_IE = INTR_FLAG_KEYPAD | INTR_FLAG_GAMEPAK;
+
+    REG_KEYCNT = 0xC304; // TODO 1100 0011 0000 0100
+    // Select:
+    // * Select button
+    // * L/R Button
+    // Enable IRQ
+    // Logical AND
+    // So do something when all buttons above are pressed
+
+    REG_IME = 1;
+
+    SoundBiasReset();
+    asm("swi 0x3");
+    SoundBiasSet();
+
+    REG_IME = 0;
+
+    REG_IE = ie_store; // restore IE
+    REG_KEYCNT = 0; // reset KEYCNT
+
+    REG_IME = 1;
+
+    // Good after here
+    while(REG_VCOUNT <= 159){}
+    REG_DISPCNT = dispcnt_save; // restore DISPCNT
+    while(REG_KEYINPUT != 0x3ff){} // All buttons
+}