From 0d8c76cf7a6d3e44d128e17c800c4e97d8b73ee0 Mon Sep 17 00:00:00 2001
From: Marcus Huderle <huderlem@gmail.com>
Date: Mon, 22 Oct 2018 18:51:13 -0500
Subject: Decompile sub_A20

---
 src/main.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)

(limited to 'src/main.c')

diff --git a/src/main.c b/src/main.c
index 230f9ff..e178233 100755
--- a/src/main.c
+++ b/src/main.c
@@ -1,8 +1,11 @@
 #include "global.h"
+#include "m4a.h"
 #include "main.h"
 
 extern void sub_B54(void);
 extern void sub_BBC(void);
+extern void sub_CBC(void);
+extern void sub_D10(void);
 extern void sub_D74(void);
 extern void sub_FE8(void);
 extern void ReadKeys(void);
@@ -24,3 +27,87 @@ void AgbMain(void)
         sub_D74();
     }
 }
+
+void sub_9BC_Main(void)
+{
+    switch (gMain.subState)
+    {
+    case 0:
+        sub_CBC();
+        sub_24C();
+        gMain.subState++;
+        break;
+    case 1:
+        if (gMain.newKeys & KEYS_MASK)
+            gMain.subState = 2;
+        break;
+    default:
+        sub_2B4();
+        sub_D10();
+        SetMainGameState(1);
+        break;
+    }
+}
+
+void sub_A08(void)
+{
+    m4aSoundVSync();
+    INTR_CHECK |= INTR_FLAG_VBLANK;
+}
+
+void sub_A20(void)
+{
+    INTR_CHECK |= INTR_FLAG_VCOUNT;
+    while (!(REG_DISPSTAT & DISPSTAT_HBLANK));
+    if (gMain.mainState == 2)
+    {
+        REG_BG0HOFS = 0;
+        if (gMain.unk28)
+        {
+            if (gMain.vCount == 72)
+            {
+                REG_BG0VOFS = gMain.unk2A * 4 + 88;
+                gMain.vCount = 144;
+                REG_DISPSTAT &= 0xFF;
+                REG_DISPSTAT |= (gMain.vCount << 8) + DISPSTAT_VCOUNT_INTR;
+            }
+            else
+            {
+                REG_BG0VOFS = 352;
+                gMain.vCount = 72;
+                REG_DISPSTAT &= 0xFF;
+                REG_DISPSTAT |= (gMain.vCount << 8) + DISPSTAT_VCOUNT_INTR;
+            }
+        }
+        else if (gMain.unk2C)
+        {
+            if (gMain.vCount == 40)
+            {
+                gMain.blendControl = BLDCNT_TGT2_OBJ | BLDCNT_TGT2_BG1 | BLDCNT_TGT2_BG2 | BLDCNT_TGT2_BG3
+                            | BLDCNT_EFFECT_BLEND | BLDCNT_TGT1_BG0;
+                gMain.blendAlpha = 0xA06;
+                REG_BLDCNT = gMain.blendControl;
+                REG_BLDALPHA = gMain.blendAlpha;
+                gMain.vCount = 144;
+                REG_DISPSTAT &= 0xFF;
+                REG_DISPSTAT |= (gMain.vCount << 8) + DISPSTAT_VCOUNT_INTR;
+            }
+            else
+            {
+                gMain.blendControl = BLDCNT_TGT2_OBJ | BLDCNT_TGT2_BG1 | BLDCNT_TGT2_BG2 | BLDCNT_TGT2_BG3
+                            | BLDCNT_EFFECT_NONE | BLDCNT_TGT1_BG0;
+                gMain.blendAlpha = 0;
+                REG_BLDCNT = gMain.blendControl;
+                REG_BLDALPHA = gMain.blendAlpha;
+                REG_BG0VOFS = 352;
+                gMain.vCount = 40;
+                REG_DISPSTAT &= 0xFF;
+                REG_DISPSTAT |= (gMain.vCount << 8) + DISPSTAT_VCOUNT_INTR;
+            }
+        }
+        else
+        {
+            REG_BG0VOFS = 352;
+        }
+    }
+}
-- 
cgit v1.2.3