1 files changed, 75 insertions, 4 deletions

diff --git a/src/field_region_map.c b/src/field_region_map.c
index 4923f2069..399ae9070 100644
--- a/src/field_region_map.c
+++ b/src/field_region_map.c
@@ -10,6 +10,9 @@
 #include "text_window.h"
 #include "palette.h"
 #include "menu.h"
+#include "strings.h"
+#include "international_string_util.h"
+#include "region_map.h"
 
 // Static type declarations
 
@@ -17,8 +20,9 @@
 
 EWRAM_DATA struct {
     MainCallback callback;
-    u8 filler_004[0x888];
-    u16 unk_88c;
+    u8 filler_004[0x4];
+    u8 filler_008[0x884];
+    u16 state;
 } *gUnknown_0203BCD0 = NULL;
 
 // Static ROM declarations
@@ -26,7 +30,8 @@ EWRAM_DATA struct {
 static void sub_81701C4(void);
 static void sub_8170260(void);
 static void sub_8170274(void);
-void sub_8170290(void);
+static void sub_8170290(void);
+void sub_8170428(void);
 
 // .rodata
 
@@ -39,7 +44,7 @@ void sub_817018C(MainCallback callback)
 {
     SetVBlankCallback(NULL);
     gUnknown_0203BCD0 = malloc(sizeof(*gUnknown_0203BCD0));
-    gUnknown_0203BCD0->unk_88c = 0;
+    gUnknown_0203BCD0->state = 0;
     gUnknown_0203BCD0->callback = callback;
     SetMainCallback2(sub_81701C4);
 }
@@ -82,3 +87,69 @@ static void sub_8170274(void)
     UpdatePaletteFade();
     do_scheduled_bg_tilemap_copies_to_vram();
 }
+
+void sub_8170290(void)
+{
+    u8 offset;
+
+    switch (gUnknown_0203BCD0->state)
+    {
+        case 0:
+            sub_8122CDC(gUnknown_0203BCD0->filler_008, 0);
+            sub_8124288(0, 0);
+            sub_81240D4(1, 1);
+            gUnknown_0203BCD0->state ++;
+            break;
+        case 1:
+            SetWindowBorderStyle(1, 0, 0x27, 0xd);
+            offset = GetStringCenterAlignXOffset(1, gText_Hoenn, 0x38);
+            PrintTextOnWindow(1, 1, gText_Hoenn, offset, 1, 0, 0);
+            schedule_bg_copy_tilemap_to_vram(0);
+            SetWindowBorderStyle(0, 0, 0x27, 0xd);
+            sub_8170428();
+            BeginNormalPaletteFade(-1, 0, 16, 0, 0);
+            gUnknown_0203BCD0->state ++;
+            break;
+        case 2:
+            SetGpuRegBits(REG_OFFSET_DISPCNT, DISPCNT_OBJ_1D_MAP | DISPCNT_OBJ_ON);
+            ShowBg(0);
+            ShowBg(2);
+            gUnknown_0203BCD0->state ++;
+            break;
+        case 3:
+            if (!gPaletteFade.active)
+            {
+                gUnknown_0203BCD0->state ++;
+            }
+            break;
+        case 4:
+            switch (sub_81230AC())
+            {
+                case 3:
+                    sub_8170428();
+                    break;
+                case 4:
+                case 5:
+                    gUnknown_0203BCD0->state ++;
+                    break;
+            }
+            break;
+        case 5:
+            BeginNormalPaletteFade(-1, 0, 0, 16, 0);
+            gUnknown_0203BCD0->state ++;
+            break;
+        case 6:
+            if (!gPaletteFade.active)
+            {
+                sub_812305C();
+                SetMainCallback2(gUnknown_0203BCD0->callback);
+                if (gUnknown_0203BCD0 != NULL)
+                {
+                    free(gUnknown_0203BCD0);
+                    gUnknown_0203BCD0 = NULL;
+                }
+                FreeAllWindowBuffers();
+            }
+            break;
+    }
+}