Start decompiling chooseFile.c

include/functions.h

@@ -170,7 +170,7 @@ extern void sub_0804F578(void);
 extern void sub_08059994(void);
 extern void LoadGfxGroup(u32);
 extern s32 sub_0801CFA8(u32);
-extern void sub_080A3210();
+extern void sub_080A3210(void);
 extern void sub_080ADA14(u32, u32);
 extern void sub_0801E1B8(u32, u32);
 extern void sub_0801E1EC(s32, s32, s32);
@@ -184,7 +184,7 @@ extern u32 sub_080A4494(void);
 extern void sub_080A4528(void);
 extern void sub_080A4398(void);
 extern void sub_0801E738(u32);
-extern void sub_080A70AC(void*);
+extern void sub_080A70AC(const void*);
 extern void sub_080A7114(u32);
 extern void sub_08001242(void);
 extern u32 sub_08003FC4(Entity*, u32);
@@ -203,11 +203,11 @@ extern void sub_0807A108(void);
 extern void sub_0801766C(Entity*);
 extern void sub_08004168(Entity*);
 extern u32 sub_08052638(u32);
-extern void sub_0805616C();
+extern void sub_0805616C(void);
 extern u32 sub_0807CF08(u32, u8*);
 extern void sub_0807CF48(u32);
 extern u32 sub_0807CF10(u8 *);
-extern void sub_08056208();
+extern void sub_08056208(void);
 extern void sub_08050384();
 extern void sub_080B1520(u32);
 extern struct_0807D1C4* sub_0807D1C4(u32);
@@ -250,4 +250,5 @@ extern void sub_08097B24(Entity*);
 extern u32 sub_08079F8C(void);
 extern void sub_080787CC(Entity*);
 extern void sub_080526F8(s32);
+extern int sub_0807CF28(u32, SaveFile*);
 #endif

include/main.h

@@ -39,15 +39,16 @@ typedef struct {
 } Main;
 
 typedef struct {
-    u16 nextToLoad;
+    /*0x00*/ u16 nextToLoad;
-    u8 transitionType;
+    /*0x02*/ u8 transitionType;
-    u8 field_0x3;
+    /*0x03*/ u8 field_0x3;
-    u8 state;
+    /*0x04*/ u8 state;
-    u8 field_0x5;
+    /*0x05*/ u8 field_0x5;
-    u8 field_0x6;
+    /*0x06*/ u8 field_0x6;
-    u8 pauseFadeIn;
+    /*0x07*/ u8 pauseFadeIn;
-    u16 isLoading;
+    /*0x08*/ u16 isLoading;
-    u16 fadeInTime;
+    /*0x0A*/ u16 fadeInTime;
+    /*0x0C*/ u8 fillerC[0x3A8];
 } UI;
 
 extern Main gUnk_03001000;

include/structures.h

@@ -7,8 +7,8 @@
 
 typedef struct {
     char header[4];
-    u8 saveFile;
+    u8 saveFileId;
-    u8 field_0x5;
+    u8 messageSpeed;
     u8 brightnessPref;
     u8 gameLanguage;
 } struct_02000000;
@@ -34,7 +34,10 @@ typedef struct {
 extern struct_02000010 gUnk_02000010;
 
 typedef struct {
-    /*0x000*/ u8 filler0[0x6];
+    /*0x000*/ u8 filler0[0x2];
+    /*0x002*/ u8 messageSpeed;
+    /*0x003*/ u8 brightnessPref;
+    /*0x004*/ u8 filler4[0x2];
     /*0x006*/ u8 unk6;
     /*0x007*/ u8 unk7;
     /*0x008*/ u8 unk8;
@@ -44,11 +47,12 @@ typedef struct {
     /*0x050*/ u32 unk50;
     /*0x054*/ u8 filler54[0x54];
     /*0x0A8*/ Stats stats;
-    /*0x0D0*/ u8 filler4[0x3c0];
+    /*0x0D0*/ u8 fillerD0[0x3c0];
     /*0x490*/ u32 unk490;
-} struct_02002A40;
+    /*0x494*/ u8 filler494[0x20];
+} SaveFile;
 
-extern struct_02002A40 gUnk_02002A40;
+extern SaveFile gUnk_02002A40;
 
 typedef struct {
     u32 frameCount;    // regular frame count? does anything reset it?
@@ -99,10 +103,13 @@ typedef struct {
 
 typedef struct {
     /*0x00*/ u8 unk0;
-    /*0x01*/ u8 filler1[0x5];
+    /*0x01*/ u8 unk1;
+    /*0x02*/ u8 unk2;
+    /*0x03*/ u8 unk3;
+    /*0x04*/ u8 filler4[0x2];
     /*0x06*/ u8 unk6;
     /*0x07*/ u8 unk7;
-    /*0x08*/ s8 unk8[0x10]; // ?? unclear know how large this is
+    /*0x08*/ s8 unk8[0xE20];
 } struct_02019EE0;
 
 extern struct_02019EE0 gUnk_02019EE0;
@@ -126,4 +133,18 @@ typedef struct {
 
 extern struct_03000FD0 gFadeControl;
 
+typedef struct {
+    u8 unk0[0x24];
+    u8 ezloNagFuncIndex;
+    u8 filler25[0x30F];
+} struct_0200AF00;
+
+extern struct_0200AF00 gUnk_0200AF00;
+
+typedef struct {
+    u8 unk0;
+} struct_02024490;
+
+extern struct_02024490 gUnk_02024490;
+
 #endif

linker.ld

@@ -18,6 +18,7 @@ SECTIONS {
         . = 0x00000070; gUnk_02000070 = .;
         . = 0x00000080; gMenu = .;
         . = 0x00000080; gIntroState = .;
+        . = 0x00000080; gChooseFileState = .;
         . = 0x00000090; gUnk_02000090 = .;
         . = 0x000000B0; gUnk_020000B0 = .;
         . = 0x000000C0; gUnk_020000C0 = .;
@@ -72,7 +73,7 @@ SECTIONS {
         . = 0x00018EB0; gUnk_02018EB0 = .;
         . = 0x00018EE0; gUnk_02018EE0 = .;
         . = 0x00019EE0; gUnk_02019EE0 = .;
-        . = 0x00019EEC; gUnk_02019EEC = .;
+        . = 0x00019EEC; gSaveFiles = .;
         . = 0x00019F6C; gUnk_02019F6C = .;
         . = 0x0001AEE0; gUnk_0201AEE0 = .;
         . = 0x00021EE0; gUnk_02021EE0 = .;
@@ -450,6 +451,8 @@ SECTIONS {
 		src/sub_08050008.o(.text);
 		src/sub_08050024.o(.text);
 		asm/code_08050038.o(.text);
+		src/chooseFile.o(.text);
+		asm/chooseFile.o(.text);
 		asm/sub_08052418.o(.text);
 		src/initializePlayer.o(.text);
 		src/area.o(.text);

src/chooseFile.c

@@ -0,0 +1,236 @@
+#include "global.h"
+#include "functions.h"
+#include "main.h"
+#include "screen.h"
+
+typedef struct {
+    u8 filler0[0x30];
+} ChooseFileState;
+
+// TODO: This occupies the same memory region as gMenu
+extern ChooseFileState gChooseFileState;
+
+typedef struct {
+    u8 filler0[0x10];
+    u16 unk10;
+    u8 filler12[0x6];
+} struct_080FC844;
+
+typedef struct {
+    u8 filler0[0x4];
+} struct_020227E8;
+
+extern struct_020227E8 gUnk_020227E8;
+
+typedef struct {
+    u8 filler0[0x800];
+} struct_02034CB0;
+
+extern struct_02034CB0 gUnk_02034CB0;
+extern struct_02034CB0 gUnk_02021F30;
+extern SaveFile gSaveFiles[];
+extern u32 gUsedPalettes;
+
+static void sub_08050624(u32);
+static void sub_0805066C(void);
+
+extern void sub_0801D66C(const void* src, void* dest, u32 size);
+extern void sub_08056FEC(u32, struct_020227E8*);
+extern void sub_0805F46C(u32, struct_080FC844*);
+extern void sub_0801C4A0(u32, u32);
+extern void sub_0801D66C(const void* src, void* dest, u32 size);
+extern void sub_080507FC(void);
+extern void sub_08080668(void);
+extern void sub_0805194C(u32);
+extern void LoadPalettes(const u8*, int, int);
+
+extern const struct_080FC844 gUnk_080FC844;
+extern const u16 gUnk_080FC85C[][3];
+extern void (*const gUnk_080FC8A4[])(void);
+extern void (*const gUnk_080FC8B0[])(void);
+extern const u8 gUnk_080FC8D0[];
+extern const u16 gUnk_080FC8DE[];
+extern const u8 gGlobalGfxAndPalettes[];
+
+void sub_08050318(u32 arg0, u32 arg1) {
+    u32 sfx;
+    struct_080FC844 var0;
+
+    sub_08050384();
+    sub_0801D66C(&gUnk_080FC844, &var0, sizeof(gUnk_080FC844));
+    sub_08056FEC(arg1, &gUnk_020227E8);
+    var0.unk10 |= gUnk_080FC85C[arg0][0] << 0xC;
+    sub_0805F46C(gUnk_080FC85C[arg0][1], &var0);
+    sfx = gUnk_080FC85C[arg0][2];
+    if (sfx) {
+        PlaySFX(sfx);
+    }
+    gScreen.bg.bg3Control = 1;
+}
+
+void sub_08050384(void) {
+    sub_0801C4A0(0, 0);
+    _DmaZero(&gUnk_02034CB0, sizeof(gUnk_02034CB0));
+    gScreen.bg.bg3Control = 1;
+}
+
+void sub_080503A8(u32 gfxGroup) {
+    LoadGfxGroup(gfxGroup);
+    gScreen.bg.bg2yOffset = 1;
+    gScreen.affine.unk = 1;
+}
+
+void sub_080503BC(u8 state) {
+    gUnk_02032EC0.state = state;
+    _DmaZero(&gUnk_02034CB0, sizeof(gUnk_02034CB0));
+    _DmaZero(&gUnk_02021F30, sizeof(gUnk_02021F30));
+}
+
+void sub_080503E4(u32 saveFileId) {
+    u8 messageSpeed;
+    u8 brightnessPref;
+
+    if (saveFileId > 2) {
+        messageSpeed = 1;
+        brightnessPref = 1;
+    } else {
+        SaveFile* saveFile = &gSaveFiles[saveFileId];
+        messageSpeed = saveFile->messageSpeed;
+        brightnessPref = saveFile->brightnessPref;
+    }
+
+    ((struct_02000000 *)0x2000000)->messageSpeed = messageSpeed;
+    ((struct_02000000 *)0x2000000)->brightnessPref = brightnessPref;
+    gUsedPalettes = 0xFFFFFFFF;
+}
+
+void sub_0805041C(u32 saveFileId) {
+    SaveFile* saveFile;
+
+    if (saveFileId < 3) {
+        ((struct_02000000 *)0x2000000)->saveFileId = saveFileId;
+        saveFile = &gSaveFiles[saveFileId];
+        sub_0801D66C(saveFile, &gUnk_02002A40, sizeof(*saveFile));
+    }
+    sub_080503E4(saveFileId);
+}
+
+void HandleChooseFileScreen(void) {
+    sub_080AD90C();
+    gUnk_080FC8A4[gUnk_03001000.funcIndex]();
+    if (gUnk_02032EC0.transitionType != gUnk_02032EC0.state) {
+        gUnk_02032EC0.transitionType = gUnk_02032EC0.state;
+        gScreen.bg.bg1Control = 0;
+        gScreen.bg.bg2Control = 0;
+        gScreen.bg.bg1yOffset = 0;
+        gScreen.bg.bg2xOffset = 0;
+        gScreen.affine.bg2xOffset = 0;
+        gScreen.affine.bg2yOffset = 0;
+        _DmaZero(&gChooseFileState, sizeof(gChooseFileState));
+    }
+
+    sub_080507FC();
+    gUnk_080FC8B0[gUnk_02032EC0.transitionType]();
+    gUnk_02019EE0.unk0 = 0;
+    sub_0805E5C0();
+    sub_0805066C();
+    sub_0801C1D4();
+    sub_0801C208();
+    sub_080AD9B0();
+    sub_080AD918();
+    if (gUnk_02019EE0.unk3 != ((struct_02000000 *)0x2000000)->gameLanguage) {
+        gUnk_02019EE0.unk3 = ((struct_02000000 *)0x2000000)->gameLanguage;
+        sub_080503A8(0x6);
+        sub_080503A8(0xF);
+    }
+}
+
+void sub_080504F4(void) {
+    u32 i;
+
+    sub_0801DA90(1);
+    sub_080A3210();
+    _DmaZero((void*)VRAM, 0x80);
+    sub_08056418();
+    EraseAllEntities();
+    sub_08080668();
+    sub_080ADD30();
+    sub_0801CFA8(0);
+    _DmaZero(&gUnk_0200AF00, sizeof(gUnk_0200AF00));
+    _DmaZero(&gUnk_02019EE0, sizeof(gUnk_02019EE0));
+    gUnk_02019EE0.unk3 = 7;
+    gUnk_02019EE0.unk6 = ((struct_02000000 *)0x2000000)->gameLanguage > 1 ? 3 : 0;
+    _DmaZero(&gUnk_02032EC0, sizeof(gUnk_02032EC0));
+    gUnk_02032EC0.transitionType = 8;
+    sub_080503BC(0);
+    sub_0805616C();
+    sub_08050624(0);
+    sub_08050624(1);
+    sub_08050624(2);
+    sub_08056208();
+    sub_080503A8(0x5);
+    LoadPaletteGroup(0x9);
+    for (i = 0; i < 26; i++) {
+        CreateObject(0x48, i, 0);
+    }
+
+    sub_080A70AC(gUnk_080FC8D0);
+    sub_080507FC();
+    gScreen.lcd.displayControl |= 0x1F00;
+    gScreen.affine.bg3Control = 0x1E0B;
+    gScreen.controls.layerFXControl = 0x844;
+    gScreen.controls.alphaBlend = BLDALPHA_BLEND(15, 10);
+    gUnk_02024490.unk0 = 1;
+    gUnk_03001000.funcIndex = 1;
+    PlaySFX(0x7);
+    DoFade(4, 8);
+}
+
+void nullsub_479(void) {
+}
+
+void sub_0805060C(void) {
+    if (!gFadeControl.active) {
+        InitScreen(SCREEN_GAMEPLAY);
+    }
+}
+
+static void sub_08050624(u32 saveFileId) {
+    SaveFile* saveFile = &gSaveFiles[saveFileId];
+    int var0 = sub_0807CF28(saveFileId, saveFile);
+    switch (var0) {
+        case -1:
+            sub_0807CF48(saveFileId);
+            // fallthrough
+        case 0:
+            sub_0805194C(saveFileId);
+            break;
+    }
+    gUnk_02019EE0.unk8[saveFileId] = var0;
+}
+
+static void sub_0805066C(void) {
+    u32 loadNewPalette;
+    const u8* paletteOffset;
+
+    loadNewPalette = FALSE;
+    if (--gUnk_02019EE0.unk1 == 0) {
+        gUnk_02019EE0.unk1 = 16;
+        gUnk_02019EE0.unk2 = (gUnk_02019EE0.unk2 + 1) % 15;
+        loadNewPalette = TRUE;
+    }
+
+    if (gUnk_02019EE0.unk2 == 0) {
+        gUnk_02019EE0.unk2 = 1;
+        gUnk_02019EE0.unk1 = (Random() & 0x7) * 16 + 8;
+        loadNewPalette = TRUE;
+    }
+
+    if (loadNewPalette) {
+        paletteOffset = &gGlobalGfxAndPalettes[gUnk_080FC8DE[gUnk_02019EE0.unk2]];
+        LoadPalettes(&paletteOffset[0x11AA0], 11, 1);
+        LoadPalettes(&paletteOffset[0x11BA0], 12, 1);
+        LoadPalettes(&paletteOffset[0x11CA0], 13, 1);
+        LoadPalettes(&paletteOffset[0x11DA0], 14, 1);
+    }
+}

src/code_0805436C.c

@@ -7,7 +7,7 @@
 typedef struct {
     u8 filler[0xa8];
     Stats stats;
-} struct_02002A40;
+} SaveFile;
 
 typedef struct {
     u8 unk;
@@ -19,7 +19,7 @@ typedef struct {
     u8 unk;
 } ScreenTransition;
 
-extern struct_02002A40 gUnk_02002A40;
+extern SaveFile gUnk_02002A40;
 extern struct_080FD5B4 gUnk_080FD5B4[];
 extern ScreenTransition gScreenTransition;
 

src/code_0807CC3C.c

@@ -35,10 +35,10 @@ u32 sub_0807CDE8(u32 arg0) {
         sub_0805616C();
         switch (arg0) {
             case 0:
-                temp = sub_0807CF08(gUnk_02000000->saveFile, gUnk_02002A40.filler0);
+                temp = sub_0807CF08(gUnk_02000000->saveFileId, gUnk_02002A40.filler0);
                 break;
             case 1:
-                sub_0807CF48(gUnk_02000000->saveFile);
+                sub_0807CF48(gUnk_02000000->saveFileId);
                 temp = 1;
                 break;
             case 2:
@@ -113,7 +113,7 @@ u32 sub_0807CF1C(u8* arg0) {
     return sub_0807CF88(5, arg0);
 }
 
-u32 sub_0807CF28(u32 arg0, void* arg1) {
+int sub_0807CF28(u32 arg0, SaveFile* arg1) {
     return sub_0807D008(arg0, arg1);
 }
 

src/entity.c

@@ -215,7 +215,7 @@ void sub_0805E92C(u32 param_1)
 }
 
 extern Entity gUnk_020369F0;
-extern void sub_0801D66C(void* dst, void* src, size_t size); // dma copy
+extern void sub_0801D66C(const void* src, void* dest, size_t size); // dma copy
 extern void sub_0805E98C(void);
 
 void sub_0805E958(void)

src/ezloNag.c

@@ -2,6 +2,7 @@
 #include "entity.h"
 #include "functions.h"
 #include "textbox.h"
+#include "structures.h"
 
 typedef struct {
     s8 unk0;
@@ -23,13 +24,6 @@ typedef struct {
     u8 unk13;
 } Element;
 
-typedef struct {
-    u8 unk0[0x24];
-    u8 ezloNagFuncIndex;
-} struct_0200AF00;
-
-extern struct_0200AF00 gUnk_0200AF00;
-
 ///////////////////////////////////////////////////////////////
 
 extern void sub_0805ECEC(u32, u32, u32, u32);

src/intro.c

@@ -22,6 +22,7 @@ typedef struct {
     int swordBgScaleRatio;
 } IntroState;
 
+// TODO: This occupies the same memory region as gMenu
 extern IntroState gIntroState;
 
 enum {
@@ -125,8 +126,6 @@ static void HandleNintendoCapcomLogos(void)
 
 extern u16 gUnk_03001010[5];
 
-extern u8 gUnk_02024490;
-
 static void HandleTitlescreen(void)
 {
     int advance;
@@ -142,7 +141,7 @@ static void HandleTitlescreen(void)
             EraseAllEntities();
             sub_0801CFA8(0);
             sub_080ADD30();
-            gUnk_02024490 = 1;
+            gUnk_02024490.unk0 = 1;
             LoadGfxGroup(2);
             if (((struct_02000000*)0x2000000)->gameLanguage == 0) {
                 paletteGroup = 3;

src/mainLoop.c

@@ -34,7 +34,7 @@ void MainLoop(void) {
     sub_08056208();
     gUnk_02000010.field_0x4 = 193;
     sub_0804FFE4();
-    DmaSet(3, 0x5000000U, gPaletteBuffer, 0x84000080U);
+    DmaCopy32(3, BG_PLTT, gPaletteBuffer, BG_PLTT_SIZE);
     sub_0804FF84(1);
     sub_08056418();
     sub_080ADD30();

src/npc/smith.c

@@ -5,7 +5,7 @@
 typedef struct {
     u8 filler[8];
     u8 unk;
-} struct_02002A40;
+} SaveFile;
 
 extern u32 GetFacingDirection(Entity*, Entity*);
 extern u32 sub_0806F5A4(u32);
@@ -33,7 +33,7 @@ extern void (*const gUnk_0811036C[])(Entity*);
 
 extern u16 gUnk_08110380[];
 extern SpriteLoadData gUnk_08110354;
-extern struct_02002A40 gUnk_02002A40;
+extern SaveFile gUnk_02002A40;
 extern u32 gUnk_08110390[];
 extern u16 gUnk_081103D0[];
 extern u32 gUnk_081103E0;

src/npc/teachers.c

@@ -5,7 +5,7 @@
 typedef struct {
     u8 filler[8];
     u8 unk;
-} struct_02002A40;
+} SaveFile;
 
 extern SpriteLoadData gUnk_08113910[];
 extern void sub_0805E3A0(Entity*, u32);
@@ -20,7 +20,7 @@ extern u32 UpdateFuseInteraction(Entity*);
 extern void sub_0807000C(Entity*);
 extern void ShowNPCDialogue(Entity*, u16*);
 
-extern struct_02002A40 gUnk_02002A40;
+extern SaveFile gUnk_02002A40;
 extern u16 gUnk_08113930[];
 
 void Teachers(Entity* this) {

src/object/object48.c

@@ -458,7 +458,7 @@ void sub_0808EF24(Entity* this) {
     } else {
         this->spriteSettings.b.draw = 2;
         if (this->entityType.form == 21) {
-            var0 = ((struct_02000000 *)0x2000000)->field_0x5;
+            var0 = ((struct_02000000 *)0x2000000)->messageSpeed;
         } else {
             var0 = ((struct_02000000 *)0x2000000)->brightnessPref;
         }