link_rfu_4 is part of mystery_gift_menu

asm/intro.s

@@ -2742,14 +2742,14 @@ _080EDC0C:
 	bl DisableInterrupts
 	movs r0, 0
 	bl SetHBlankCallback
-	ldr r0, _080EDC3C @ =sub_8078914
+	ldr r0, _080EDC3C @ =CB2_InitTitleScreen
 	bl SetMainCallback2
 _080EDC34:
 	pop {r4}
 	pop {r0}
 	bx r0
 	.align 2, 0
-_080EDC3C: .4byte sub_8078914
+_080EDC3C: .4byte CB2_InitTitleScreen
 	thumb_func_end sub_80EDBE8
 
 	thumb_func_start sub_80EDC40

asm/main_menu.s

@@ -1005,7 +1005,7 @@ _0800CB64: .4byte gPlttBufferUnfaded
 _0800CB68: .4byte gPlttBufferFaded
 _0800CB6C: .4byte gUnknown_2031DE0
 _0800CB70:
-	ldr r0, _0800CB8C @ =sub_81422AC
+	ldr r0, _0800CB8C @ =c2_mystery_gift
 	bl SetMainCallback2
 	bl sub_812B478
 	bl FreeAllWindowBuffers
@@ -1017,7 +1017,7 @@ _0800CB84:
 	pop {r0}
 	bx r0
 	.align 2, 0
-_0800CB8C: .4byte sub_81422AC
+_0800CB8C: .4byte c2_mystery_gift
 	thumb_func_end sub_800CA94
 
 	thumb_func_start sub_800CB90
@@ -1141,7 +1141,7 @@ sub_800CC68: @ 800CC68
 	ands r0, r1
 	cmp r0, 0
 	bne _0800CC86
-	ldr r0, _0800CC90 @ =sub_8078914
+	ldr r0, _0800CC90 @ =CB2_InitTitleScreen
 	bl SetMainCallback2
 	adds r0, r4, 0
 	bl DestroyTask
@@ -1151,7 +1151,7 @@ _0800CC86:
 	bx r0
 	.align 2, 0
 _0800CC8C: .4byte gPaletteFade
-_0800CC90: .4byte sub_8078914
+_0800CC90: .4byte CB2_InitTitleScreen
 	thumb_func_end sub_800CC68
 
 	thumb_func_start sub_800CC94

asm/title_screen.s

@@ -5,8 +5,8 @@
 
 	.text
 
-	thumb_func_start sub_8078914
+	thumb_func_start CB2_InitTitleScreen
-sub_8078914: @ 8078914
+CB2_InitTitleScreen: @ 8078914
 	push {r4-r6,lr}
 	sub sp, 0xC
 	ldr r0, _08078930 @ =gMain
@@ -230,7 +230,7 @@ _08078B26:
 	bx r0
 	.align 2, 0
 _08078B30: .4byte gMain
-	thumb_func_end sub_8078914
+	thumb_func_end CB2_InitTitleScreen
 
 	thumb_func_start sub_8078B34
 sub_8078B34: @ 8078B34

include/mystery_gift_menu.h

@@ -1,9 +1,9 @@
 #ifndef GUARD_MYSTERY_GIFT_MENU_H
 #define GUARD_MYSTERY_GIFT_MENU_H
 
-extern bool8 gUnknown_203F3B8;
+extern bool8 gGiftIsFromEReader;
 
-void sub_81422FC(void);
+void MainCB_FreeAllBuffersAndReturnToInitTitleScreen(void);
-void sub_8142344(bool8, bool32);
+void PrintMysteryGiftOrEReaderTopMenu(bool8, bool32);
 
 #endif //GUARD_MYSTERY_GIFT_MENU_H

include/title_screen.h

@@ -0,0 +1,6 @@
+#ifndef GUARD_TITLE_SCREEN_H
+#define GUARD_TITLE_SCREEN_H
+
+void CB2_InitTitleScreen(void);
+
+#endif //GUARD_TITLE_SCREEN_H

ld_script.txt

@@ -243,7 +243,6 @@ SECTIONS {
         src/roamer.o(.text);
         src/mystery_gift_menu.o(.text);
         asm/mystery_gift_menu.o(.text);
-        asm/link_rfu_4.o(.text);
         src/mevent.o(.text);
         src/mevent_server_helpers.o(.text);
         src/mevent_server.o(.text);
@@ -411,7 +410,7 @@ SECTIONS {
         data/slot_machine.o(.rodata);
         src/roamer.o(.rodata);
         src/mystery_gift_menu.o(.rodata);
-        data/link_rfu_4.o(.rodata);
+        data/mystery_gift_menu.o(.rodata);
         src/mevent.o(.rodata);
         src/mevent_server_helpers.o(.rodata);
         src/mevent_server.o(.rodata);

src/mevent.c

@@ -240,7 +240,7 @@ u32 sub_8143770(u8 * r4, u16 * r5)
     return 0;
 }
 
-void sub_81438A0(void)
+void task_add_00_ereader(void)
 {
     u8 taskId = CreateTask(sub_8143910, 0);
     struct MEventTaskData1 *data = (struct MEventTaskData1 *)gTasks[taskId].data;
@@ -478,7 +478,7 @@ void sub_8143910(u8 taskId)
             sub_812B484();
             Free(data->t10);
             DestroyTask(taskId);
-            SetMainCallback2(sub_81422FC);
+            SetMainCallback2(MainCB_FreeAllBuffersAndReturnToInitTitleScreen);
             break;
     }
 }

src/mevent_8145654.c

@@ -252,7 +252,7 @@ s32 sub_814593C(bool32 flag)
             FreeMonIconPalettes();
             break;
         case 5:
-            sub_8142344(gUnknown_203F3B8, flag);
+            PrintMysteryGiftOrEReaderTopMenu(gGiftIsFromEReader, flag);
             break;
         case 6:
             CopyBgTilemapBufferToVram(0);
@@ -653,7 +653,7 @@ s32 sub_8146604(bool32 flag)
             }
             break;
         case 5:
-            sub_8142344(gUnknown_203F3B8, flag);
+            PrintMysteryGiftOrEReaderTopMenu(gGiftIsFromEReader, flag);
             break;
         case 6:
             sub_8142420();

src/mystery_gift_menu.c

@@ -9,15 +9,22 @@
 #include "text.h"
 #include "window.h"
 #include "text_window.h"
+#include "menu.h"
 #include "new_menu_helpers.h"
 #include "sound.h"
 #include "mystery_gift_menu.h"
+#include "title_screen.h"
 #include "link_rfu.h"
 #include "constants/songs.h"
 
+extern const struct TextColor gUnknown_8466EE8;
+
 EWRAM_DATA u8 sDownArrowCounterAndYCoordIdx[8] = {};
 EWRAM_DATA bool8 gGiftIsFromEReader = FALSE;
 
+void task_add_00_mystery_gift(void);
+void task_add_00_ereader(void);
+
 static const u16 gUnkTextboxBorderPal[] = INCBIN_U16("graphics/interface/unk_textbox_border.gbapal");
 static const u32 gUnkTextboxBorderGfx[] = INCBIN_U32("graphics/interface/unk_textbox_border.4bpp.lz");
 
@@ -164,7 +171,7 @@ bool32 HandleMysteryGiftOrEReaderSetup(s32 mg_or_ereader)
         FillBgTilemapBufferRect(1, 0x000, 0, 0, 32, 32, 0x11);
         FillBgTilemapBufferRect(2, 0x000, 0, 0, 32, 32, 0x11);
         sub_8142420();
-        sub_8142344(mg_or_ereader, 0);
+        PrintMysteryGiftOrEReaderTopMenu(mg_or_ereader, 0);
         gMain.state++;
         break;
     case 2:
@@ -186,3 +193,61 @@ bool32 HandleMysteryGiftOrEReaderSetup(s32 mg_or_ereader)
     return FALSE;
 }
 
+void c2_mystery_gift(void)
+{
+    if (HandleMysteryGiftOrEReaderSetup(0))
+    {
+        SetMainCallback2(c2_mystery_gift_e_reader_run);
+        gGiftIsFromEReader = FALSE;
+        task_add_00_mystery_gift();
+    }
+}
+
+void c2_ereader(void)
+{
+    if (HandleMysteryGiftOrEReaderSetup(1))
+    {
+        SetMainCallback2(c2_mystery_gift_e_reader_run);
+        gGiftIsFromEReader = TRUE;
+        task_add_00_ereader();
+    }
+}
+
+void MainCB_FreeAllBuffersAndReturnToInitTitleScreen(void)
+{
+    gGiftIsFromEReader = FALSE;
+    FreeAllWindowBuffers();
+    Free(GetBgTilemapBuffer(0));
+    Free(GetBgTilemapBuffer(1));
+    Free(GetBgTilemapBuffer(2));
+    Free(GetBgTilemapBuffer(3));
+    SetMainCallback2(CB2_InitTitleScreen);
+}
+
+extern const u8 gUnknown_8415F51[];
+extern const u8 gUnknown_841EDCA[];
+extern const u8 gUnknown_841EDBD[];
+extern const u8 gUnknown_841DE50[];
+extern const u8 gUnknown_841DE51[];
+
+void PrintMysteryGiftOrEReaderTopMenu(bool8 mg_or_ereader, bool32 usePickOkCancel)
+{
+    const u8 * src;
+    s32 width;
+    FillWindowPixelBuffer(0, 0x00);
+    if (!mg_or_ereader)
+    {
+        src = usePickOkCancel == TRUE ? gUnknown_8415F51 : gUnknown_841EDCA;
+        AddTextPrinterParametrized2(0, 2, 2, 2, 0, 0, &gUnknown_8466EE8, 0, gUnknown_841EDBD);
+        width = 222 - GetStringWidth(0, src, 0);
+        AddTextPrinterParametrized2(0, 0, width, 2, 0, 0, &gUnknown_8466EE8, 0, src);
+    }
+    else
+    {
+        AddTextPrinterParametrized2(0, 2, 2, 2, 0, 0, &gUnknown_8466EE8, 0, gUnknown_841DE50);
+        AddTextPrinterParametrized2(0, 0, 0x78, 2, 0, 0, &gUnknown_8466EE8, 0, gUnknown_841DE51);
+    }
+    CopyWindowToVram(0, 2);
+    PutWindowTilemap(0);
+}
+

sym_ewram.txt

@@ -1615,12 +1615,7 @@ sLocationHistory: @ 203F3A8
 sRoamerLocation: @ 203F3AE
 	.space 0x2
 
-gUnknown_203F3B0: @ 203F3B0
+	.include "src/mystery_gift_menu.o"
-	.space 0x8
-
-gUnknown_203F3B8: @ 203F3B8
-	.space 0x4
-
 	.include "src/mevent.o"
 	.include "src/mevent_server_helpers.o"
 	.include "src/mevent_server.o"