through sub_80C1A94

4 files changed, 117 insertions, 305 deletions

diff --git a/asm/region_map.s b/asm/region_map.s
index ceb2213d1..ab3e5be1b 100644
--- a/asm/region_map.s
+++ b/asm/region_map.s
@@ -5,310 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_80C195C
-sub_80C195C: @ 80C195C
-	push {r4-r6,lr}
-	adds r6, r2, 0
-	lsls r1, 24
-	lsrs r5, r1, 24
-	ldr r4, _080C19E0 @ =gUnknown_20399DC
-	ldr r0, _080C19E4 @ =0x00003e28
-	bl AllocZeroed
-	str r0, [r4]
-	bl sub_80C3580
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0xB8
-	bne _080C197C
-	movs r0, 0xBC
-_080C197C:
-	bl sub_80F8544
-	ldr r1, [r4]
-	movs r2, 0xF5
-	lsls r2, 6
-	adds r1, r2
-	str r0, [r1]
-	cmp r0, 0
-	bne _080C199E
-	movs r0, 0x8A
-	bl sub_80F8544
-	ldr r1, [r4]
-	movs r3, 0xF5
-	lsls r3, 6
-	adds r1, r3
-	str r0, [r1]
-_080C199E:
-	ldr r0, [r4]
-	ldr r1, _080C19E8 @ =0x00003d48
-	adds r0, r1
-	movs r2, 0
-	strb r2, [r0]
-	ldr r0, [r4]
-	ldr r3, _080C19EC @ =0x00003d4a
-	adds r0, r3
-	strb r2, [r0]
-	ldr r0, [r4]
-	subs r3, 0x6
-	adds r1, r0, r3
-	str r6, [r1]
-	ldr r1, _080C19F0 @ =0x00003e14
-	adds r0, r1
-	strh r2, [r0]
-	movs r0, 0
-	bl sub_80C4AAC
-	bl sub_80C4BE4
-	bl sub_80C0CA0
-	ldr r1, _080C19F4 @ =gTasks
-	lsls r0, r5, 2
-	adds r0, r5
-	lsls r0, 3
-	adds r0, r1
-	ldr r1, _080C19F8 @ =sub_80C1A94
-	str r1, [r0]
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080C19E0: .4byte gUnknown_20399DC
-_080C19E4: .4byte 0x00003e28
-_080C19E8: .4byte 0x00003d48
-_080C19EC: .4byte 0x00003d4a
-_080C19F0: .4byte 0x00003e14
-_080C19F4: .4byte gTasks
-_080C19F8: .4byte sub_80C1A94
-	thumb_func_end sub_80C195C
-
-	thumb_func_start sub_80C19FC
-sub_80C19FC: @ 80C19FC
-	push {lr}
-	ldr r0, _080C1A18 @ =gUnknown_20399DC
-	ldr r1, [r0]
-	ldr r2, _080C1A1C @ =0x00003d4a
-	adds r0, r1, r2
-	ldrb r0, [r0]
-	cmp r0, 0x1
-	beq _080C1A3A
-	cmp r0, 0x1
-	bgt _080C1A20
-	cmp r0, 0
-	beq _080C1A2A
-	b _080C1A72
-	.align 2, 0
-_080C1A18: .4byte gUnknown_20399DC
-_080C1A1C: .4byte 0x00003d4a
-_080C1A20:
-	cmp r0, 0x2
-	beq _080C1A50
-	cmp r0, 0x3
-	beq _080C1A5E
-	b _080C1A72
-_080C1A2A:
-	movs r2, 0xF5
-	lsls r2, 6
-	adds r0, r1, r2
-	ldr r0, [r0]
-	ldr r0, [r0, 0x4]
-	bl LZ77UnCompWram
-	b _080C1A76
-_080C1A3A:
-	movs r2, 0xF5
-	lsls r2, 6
-	adds r0, r1, r2
-	ldr r0, [r0]
-	ldr r0, [r0, 0x8]
-	movs r2, 0xE1
-	lsls r2, 6
-	adds r1, r2
-	bl LZ77UnCompWram
-	b _080C1A76
-_080C1A50:
-	movs r2, 0xE1
-	lsls r2, 6
-	movs r0, 0x2
-	movs r3, 0
-	bl LoadBgTiles
-	b _080C1A76
-_080C1A5E:
-	movs r2, 0xF5
-	lsls r2, 6
-	adds r0, r1, r2
-	ldr r0, [r0]
-	ldr r0, [r0, 0xC]
-	movs r1, 0xD0
-	movs r2, 0x60
-	bl LoadPalette
-	b _080C1A76
-_080C1A72:
-	movs r0, 0x1
-	b _080C1A86
-_080C1A76:
-	ldr r0, _080C1A8C @ =gUnknown_20399DC
-	ldr r1, [r0]
-	ldr r0, _080C1A90 @ =0x00003d4a
-	adds r1, r0
-	ldrb r0, [r1]
-	adds r0, 0x1
-	strb r0, [r1]
-	movs r0, 0
-_080C1A86:
-	pop {r1}
-	bx r1
-	.align 2, 0
-_080C1A8C: .4byte gUnknown_20399DC
-_080C1A90: .4byte 0x00003d4a
-	thumb_func_end sub_80C19FC
-
-	thumb_func_start sub_80C1A94
-sub_80C1A94: @ 80C1A94
-	push {r4,lr}
-	lsls r0, 24
-	lsrs r2, r0, 24
-	ldr r1, _080C1AB8 @ =gUnknown_20399DC
-	ldr r0, [r1]
-	ldr r3, _080C1ABC @ =0x00003d48
-	adds r0, r3
-	ldrb r0, [r0]
-	adds r4, r1, 0
-	cmp r0, 0x9
-	bls _080C1AAC
-	b _080C1BD0
-_080C1AAC:
-	lsls r0, 2
-	ldr r1, _080C1AC0 @ =_080C1AC4
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_080C1AB8: .4byte gUnknown_20399DC
-_080C1ABC: .4byte 0x00003d48
-_080C1AC0: .4byte _080C1AC4
-	.align 2, 0
-_080C1AC4:
-	.4byte _080C1AEC
-	.4byte _080C1B04
-	.4byte _080C1B12
-	.4byte _080C1B34
-	.4byte _080C1B54
-	.4byte _080C1B5C
-	.4byte _080C1B74
-	.4byte _080C1B84
-	.4byte _080C1B9C
-	.4byte _080C1BBC
-_080C1AEC:
-	bl sub_80C08E0
-	ldr r0, _080C1AFC @ =gUnknown_20399DC
-	ldr r1, [r0]
-	ldr r0, _080C1B00 @ =0x00003d48
-	adds r1, r0
-	b _080C1BCA
-	.align 2, 0
-_080C1AFC: .4byte gUnknown_20399DC
-_080C1B00: .4byte 0x00003d48
-_080C1B04:
-	bl sub_80C19FC
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	bne _080C1BD0
-	b _080C1BC2
-_080C1B12:
-	bl sub_80C1E94
-	ldr r0, _080C1B28 @ =gUnknown_8418E9E
-	bl sub_80C4E74
-	ldr r0, _080C1B2C @ =gUnknown_20399DC
-	ldr r1, [r0]
-	ldr r0, _080C1B30 @ =0x00003d48
-	adds r1, r0
-	b _080C1BCA
-	.align 2, 0
-_080C1B28: .4byte gUnknown_8418E9E
-_080C1B2C: .4byte gUnknown_20399DC
-_080C1B30: .4byte 0x00003d48
-_080C1B34:
-	ldr r1, [r4]
-	movs r3, 0xE1
-	lsls r3, 6
-	adds r1, r3
-	movs r0, 0x2
-	bl sub_80C1E78
-	movs r0, 0x2
-	bl CopyBgTilemapBufferToVram
-	ldr r1, [r4]
-	ldr r0, _080C1B50 @ =0x00003d48
-	adds r1, r0
-	b _080C1BCA
-	.align 2, 0
-_080C1B50: .4byte 0x00003d48
-_080C1B54:
-	movs r0, 0x2
-	bl ShowBg
-	b _080C1BC2
-_080C1B5C:
-	bl sub_80C08F4
-	ldr r0, _080C1B6C @ =gUnknown_20399DC
-	ldr r1, [r0]
-	ldr r0, _080C1B70 @ =0x00003d48
-	adds r1, r0
-	b _080C1BCA
-	.align 2, 0
-_080C1B6C: .4byte gUnknown_20399DC
-_080C1B70: .4byte 0x00003d48
-_080C1B74:
-	movs r0, 0
-	bl sub_80C1F80
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	bne _080C1BD0
-	b _080C1BC2
-_080C1B84:
-	ldr r0, _080C1B94 @ =gTasks
-	lsls r1, r2, 2
-	adds r1, r2
-	lsls r1, 3
-	adds r1, r0
-	ldr r0, _080C1B98 @ =sub_80C1BE0
-	str r0, [r1]
-	b _080C1BD0
-	.align 2, 0
-_080C1B94: .4byte gTasks
-_080C1B98: .4byte sub_80C1BE0
-_080C1B9C:
-	movs r0, 0x1
-	bl sub_80C1F80
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	bne _080C1BD0
-	ldr r0, _080C1BB4 @ =gUnknown_20399DC
-	ldr r1, [r0]
-	ldr r0, _080C1BB8 @ =0x00003d48
-	adds r1, r0
-	b _080C1BCA
-	.align 2, 0
-_080C1BB4: .4byte gUnknown_20399DC
-_080C1BB8: .4byte 0x00003d48
-_080C1BBC:
-	adds r0, r2, 0
-	bl sub_80C1E14
-_080C1BC2:
-	ldr r0, _080C1BD8 @ =gUnknown_20399DC
-	ldr r1, [r0]
-	ldr r3, _080C1BDC @ =0x00003d48
-	adds r1, r3
-_080C1BCA:
-	ldrb r0, [r1]
-	adds r0, 0x1
-	strb r0, [r1]
-_080C1BD0:
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080C1BD8: .4byte gUnknown_20399DC
-_080C1BDC: .4byte 0x00003d48
-	thumb_func_end sub_80C1A94
-
 	thumb_func_start sub_80C1BE0
 sub_80C1BE0: @ 80C1BE0
 	push {r4-r7,lr}
diff --git a/include/map_preview_screen.h b/include/map_preview_screen.h
index 5ab5584e5..c4e2fa70c 100644
--- a/include/map_preview_screen.h
+++ b/include/map_preview_screen.h
@@ -49,5 +49,6 @@ void sub_80F85BC(u16 a0);
 u16 sub_80F856C(u8 id);
 bool8 sub_80F8110(u8 mapsec, bool8 forceFirstTime);
 bool32 sub_80F83B0(void);
+const struct MapPreviewScreen * sub_80F8544(u8 mapsec);
 
 #endif //GUARD_MAP_PREVIEW_SCREEN_H
diff --git a/include/strings.h b/include/strings.h
index 56aa2ec1a..cf26e63fd 100644
--- a/include/strings.h
+++ b/include/strings.h
@@ -1008,6 +1008,7 @@ extern const u8 gUnknown_8418EB5[];
 extern const u8 gUnknown_8418E8B[];
 extern const u8 gUnknown_8418E8D[];
 extern const u8 gUnknown_8418E95[];
+extern const u8 gUnknown_8418E9E[];
 extern const u8 gUnknown_8418EA7[];
 extern const u8 gUnknown_8418EB0[];
 extern const u8 gUnknown_8418EBC[];
diff --git a/src/region_map.c b/src/region_map.c
index f654ae0cf..a42a9183d 100644
--- a/src/region_map.c
+++ b/src/region_map.c
@@ -13,6 +13,7 @@
 #include "menu.h"
 #include "string_util.h"
 #include "strings.h"
+#include "map_preview_screen.h"
 #include "constants/flags.h"
 #include "constants/songs.h"
 #include "constants/region_map.h"
@@ -84,9 +85,23 @@ struct UnkStruct_83F1B3C
     const u8 *field_8;
 };
 
+struct UnkStruct_20399DC
+{
+    u16 field_0000[0x1C20];
+    u16 field_3840[0x280];
+    const struct MapPreviewScreen * field_3D40;
+    TaskFunc field_3D44;
+    u8 field_3D48;
+    u8 field_3D49;
+    u8 field_3D4A;
+    u8 filler_3D4B[0xC9];
+    u16 field_3E14;
+    u8 filler_3E16[0x12];
+}; // size = 0x3E28
+
 EWRAM_DATA struct UnkStruct_20399D4 * gUnknown_20399D4 = NULL;
 EWRAM_DATA struct UnkStruct_20399D8 * gUnknown_20399D8 = NULL;
-EWRAM_DATA void * gUnknown_20399DC = NULL;
+EWRAM_DATA struct UnkStruct_20399DC * gUnknown_20399DC = NULL;
 EWRAM_DATA void * gUnknown_20399E0 = NULL;
 EWRAM_DATA void * gUnknown_20399E4 = NULL;
 EWRAM_DATA void * gUnknown_20399E8 = NULL;
@@ -127,6 +142,12 @@ bool8 sub_80C16D0(void);
 void sub_80C1754(u8 a0, u16 a1, u16 a2);
 void sub_80C176C(u8 a0, u16 a1, u16 a2);
 void sub_80C1880(void);
+void sub_80C1A94(u8 taskId);
+void sub_80C1BE0(u8 taskId);
+void sub_80C1E14(u8 taskId);
+void sub_80C1E94(void);
+void sub_80C1E78(u8 bgId, const u16 * tilemap);
+bool8 sub_80C1F80(u8 a0);
 void sub_80C4AAC(u8 a0);
 void sub_80C4BE4(void);
 void sub_80C4C2C(u8 a0, u16 a1, u16 a2);
@@ -1198,3 +1219,96 @@ const u8 *sub_80C1920(u16 a0)
     }
     return gUnknown_8418EC3;
 }
+
+void sub_80C195C(u8 a0, u8 taskId, TaskFunc taskFunc)
+{
+    u8 r0;
+    gUnknown_20399DC = AllocZeroed(sizeof(struct UnkStruct_20399DC));
+    r0 = sub_80C3580();
+    if (r0 == MAPSEC_TANOBY_CHAMBERS)
+        r0 = MAPSEC_MONEAN_CHAMBER;
+    gUnknown_20399DC->field_3D40 = sub_80F8544(r0);
+    if (gUnknown_20399DC->field_3D40 == NULL)
+        gUnknown_20399DC->field_3D40 = sub_80F8544(MAPSEC_ROCK_TUNNEL);
+    gUnknown_20399DC->field_3D48 = 0;
+    gUnknown_20399DC->field_3D4A = 0;
+    gUnknown_20399DC->field_3D44 = taskFunc;
+    gUnknown_20399DC->field_3E14 = 0;
+    sub_80C4AAC(0);
+    sub_80C4BE4();
+    sub_80C0CA0();
+    gTasks[taskId].func = sub_80C1A94;
+}
+
+bool8 sub_80C19FC(void)
+{
+    switch (gUnknown_20399DC->field_3D4A)
+    {
+    case 0:
+        LZ77UnCompWram(gUnknown_20399DC->field_3D40->tilesptr, gUnknown_20399DC->field_0000);
+        break;
+    case 1:
+        LZ77UnCompWram(gUnknown_20399DC->field_3D40->tilemapptr, gUnknown_20399DC->field_3840);
+        break;
+    case 2:
+        LoadBgTiles(2, gUnknown_20399DC->field_0000, 0x3840, 0x000);
+        break;
+    case 3:
+        LoadPalette(gUnknown_20399DC->field_3D40->palptr, 0xD0, 0x60);
+        break;
+    default:
+        return TRUE;
+    }
+    gUnknown_20399DC->field_3D4A++;
+    return FALSE;
+}
+
+void sub_80C1A94(u8 taskId)
+{
+    switch (gUnknown_20399DC->field_3D48)
+    {
+    case 0:
+        sub_80C08E0();
+        gUnknown_20399DC->field_3D48++;
+        break;
+    case 1:
+        if (sub_80C19FC() == TRUE)
+            gUnknown_20399DC->field_3D48++;
+        break;
+    case 2:
+        sub_80C1E94();
+        sub_80C4E74(gUnknown_8418E9E);
+        gUnknown_20399DC->field_3D48++;
+        break;
+    case 3:
+        sub_80C1E78(2, gUnknown_20399DC->field_3840);
+        CopyBgTilemapBufferToVram(2);
+        gUnknown_20399DC->field_3D48++;
+        break;
+    case 4:
+        ShowBg(2);
+        gUnknown_20399DC->field_3D48++;
+        break;
+    case 5:
+        sub_80C08F4();
+        gUnknown_20399DC->field_3D48++;
+        break;
+    case 6:
+        if (sub_80C1F80(0) == TRUE)
+            gUnknown_20399DC->field_3D48++;
+        break;
+    case 7:
+        gTasks[taskId].func = sub_80C1BE0;
+        break;
+    case 8:
+        if (sub_80C1F80(1) == TRUE)
+        {
+            gUnknown_20399DC->field_3D48++;
+        }
+        break;
+    case 9:
+        sub_80C1E14(taskId);
+        gUnknown_20399DC->field_3D48++;
+        break;
+    }
+}