diff --git a/asm/code_804FD30.s b/asm/code_804FD30.s
index d4e137903..363ae5d28 100644
--- a/asm/code_804FD30.s
+++ b/asm/code_804FD30.s
@@ -6,225 +6,6 @@
   	.text
 
 
-	thumb_func_start sub_8051288
-sub_8051288:
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0xC
-	str r0, [sp, 0x4]
-	ldr r0, _08051374
-	ldr r7, [r0]
-	ldr r0, _08051378
-	adds r3, r7, r0
-	ldr r0, [r3]
-	ldr r0, [r0, 0x4]
-	ldr r2, [sp, 0x4]
-	lsls r1, r2, 2
-	adds r0, r1, r0
-	ldr r0, [r0]
-	ldrb r2, [r0]
-	mov r10, r2
-	ldrb r0, [r0, 0x1]
-	mov r9, r0
-	ldr r2, _0805137C
-	adds r0, r7, r2
-	movs r4, 0
-	mov r2, r10
-	strh r2, [r0]
-	ldr r2, _08051380
-	adds r0, r7, r2
-	mov r2, r9
-	strh r2, [r0]
-	ldr r2, _08051384
-	ldr r0, [r3]
-	ldr r0, [r0, 0x4]
-	adds r1, r0
-	ldr r0, [r1]
-	adds r0, 0x3
-	str r0, [r2]
-	ldr r0, _08051388
-	strb r4, [r0]
-	movs r6, 0x5
-	mov r0, r9
-	adds r0, 0x5
-	cmp r6, r0
-	bge _0805132E
-	movs r1, 0x5
-	add r1, r10
-	mov r8, r1
-	str r0, [sp, 0x8]
-_080512E8:
-	movs r5, 0x5
-	cmp r5, r8
-	bge _08051326
-_080512EE:
-	bl sub_80511F0
-	adds r4, r0, 0
-	lsls r4, 24
-	lsrs r4, 24
-	adds r0, r5, 0
-	adds r1, r6, 0
-	bl GetTileSafe
-	movs r1, 0x1
-	str r1, [sp]
-	adds r1, r4, 0
-	adds r2, r5, 0
-	adds r3, r6, 0
-	bl sub_805124C
-	lsls r0, 24
-	cmp r0, 0
-	beq _08051320
-	ldr r2, _0805138C
-	adds r0, r7, r2
-	strh r5, [r0]
-	ldr r1, _08051390
-	adds r0, r7, r1
-	strh r6, [r0]
-_08051320:
-	adds r5, 0x1
-	cmp r5, r8
-	blt _080512EE
-_08051326:
-	adds r6, 0x1
-	ldr r2, [sp, 0x8]
-	cmp r6, r2
-	blt _080512E8
-_0805132E:
-	movs r6, 0
-	ldr r0, _08051394
-	adds r7, r0, 0
-_08051334:
-	movs r5, 0
-	adds r4, r6, 0x1
-_08051338:
-	cmp r5, 0x4
-	ble _08051350
-	mov r0, r10
-	adds r0, 0x5
-	cmp r5, r0
-	bge _08051350
-	cmp r6, 0x4
-	ble _08051350
-	mov r0, r9
-	adds r0, 0x5
-	cmp r6, r0
-	blt _080513A0
-_08051350:
-	adds r0, r5, 0
-	adds r1, r6, 0
-	bl GetTileSafe
-	adds r2, r0, 0
-	ldrh r1, [r2]
-	movs r0, 0x10
-	movs r3, 0
-	orrs r1, r0
-	strh r1, [r2]
-	ldr r0, _08051398
-	ldrb r0, [r0]
-	cmp r0, 0
-	beq _0805139C
-	ands r1, r7
-	movs r0, 0x3
-	orrs r1, r0
-	b _0805139E
-	.align 2, 0
-_08051374: .4byte gDungeon
-_08051378: .4byte 0x00013568
-_0805137C: .4byte 0x0000e260
-_08051380: .4byte 0x0000e262
-_08051384: .4byte gUnknown_202F1DC
-_08051388: .4byte gUnknown_202F1E1
-_0805138C: .4byte 0x0000e21c
-_08051390: .4byte 0x0000e21e
-_08051394: .4byte 0x0000fffc
-_08051398: .4byte gUnknown_202F1A8
-_0805139C:
-	ands r1, r7
-_0805139E:
-	strh r1, [r2]
-_080513A0:
-	adds r5, 0x1
-	cmp r5, 0x37
-	ble _08051338
-	adds r6, r4, 0
-	cmp r6, 0x1F
-	ble _08051334
-	ldr r1, [sp, 0x4]
-	cmp r1, 0x4
-	bne _080513DA
-	movs r6, 0x5
-	ldr r2, _0805142C
-	adds r7, r2, 0
-_080513B8:
-	movs r5, 0x2
-	adds r4, r6, 0x1
-_080513BC:
-	adds r0, r5, 0
-	adds r1, r6, 0
-	bl GetTileSafe
-	ldrh r2, [r0]
-	movs r1, 0x10
-	orrs r1, r2
-	ands r1, r7
-	strh r1, [r0]
-	adds r5, 0x1
-	cmp r5, 0x4
-	ble _080513BC
-	adds r6, r4, 0
-	cmp r6, 0x10
-	ble _080513B8
-_080513DA:
-	ldr r0, _08051430
-	ldr r0, [r0]
-	ldr r1, _08051434
-	adds r0, r1
-	movs r2, 0
-	ldrsh r0, [r0, r2]
-	cmp r0, 0x3F
-	ble _08051416
-	movs r6, 0
-_080513EC:
-	movs r5, 0
-	adds r4, r6, 0x1
-_080513F0:
-	adds r0, r5, 0
-	adds r1, r6, 0
-	bl GetTileSafe
-	adds r2, r0, 0
-	ldrh r1, [r2]
-	movs r0, 0x3
-	ands r0, r1
-	cmp r0, 0
-	bne _0805140A
-	movs r0, 0x10
-	orrs r0, r1
-	strh r0, [r2]
-_0805140A:
-	adds r5, 0x1
-	cmp r5, 0x37
-	ble _080513F0
-	adds r6, r4, 0
-	cmp r6, 0x1F
-	ble _080513EC
-_08051416:
-	bl sub_804E9DC
-	add sp, 0xC
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0805142C: .4byte 0x0000fffc
-_08051430: .4byte gDungeon
-_08051434: .4byte 0x00003a0e
-	thumb_func_end sub_8051288
-
 	thumb_func_start sub_8051438
 sub_8051438:
 	push {r4-r7,lr}
diff --git a/include/structs/str_dungeon.h b/include/structs/str_dungeon.h
index 58968d4af..aa6a04abd 100644
--- a/include/structs/str_dungeon.h
+++ b/include/structs/str_dungeon.h
@@ -365,7 +365,7 @@ typedef struct Dungeon
     struct MinMaxPosition kecleonShopPos;
     u32 unkE250;
     u8 fillE254[0xE260 - 0xE254];
-    u32 unkE260;
+    Position unkE260;
     /* 0xE264 */ Weather weather; // Uses the weather constants in weather.h.
     /* 0xE27C */ Tile unkE27C[8][8];
     /* 0xE87C */ u8 unkE87C[8][8];
diff --git a/src/dungeon_generation.c b/src/dungeon_generation.c
index c97dd7555..79eb6cde0 100644
--- a/src/dungeon_generation.c
+++ b/src/dungeon_generation.c
@@ -6422,11 +6422,61 @@ bool8 sub_805124C(Tile *tile, u8 a1, s32 x, s32 y, u8 a5)
     return sub_8051A74(tile, a1, x, y, a5);
 }
 
-/*
 void sub_8051288(s32 fixedRoomId)
 {
+    s32 x, y;
     Dungeon *dungeon = gDungeon;
+    struct PositionU8 **fileData = (void *) dungeon->unk13568->data;
+    s32 fixedRoomSizeX = fileData[fixedRoomId]->x;
+    s32 fixedRoomSizeY = fileData[fixedRoomId]->y;
+
+    dungeon->unkE260.x = fixedRoomSizeX;
+    dungeon->unkE260.y = fixedRoomSizeY;
+    // FIX ME
+    gUnknown_202F1DC = ((u8 **)(dungeon->unk13568->data))[fixedRoomId] + 3;
+    gUnknown_202F1E1 = 0;
+    for (x = 5; x < fixedRoomSizeX + 5; x++) {
+        for (y = 5; y < fixedRoomSizeY + 5; y++) {
+            u8 unk = sub_80511F0();
+            if (sub_805124C(GetTileSafe(x, y), unk, x, y, 1)) {
+                dungeon->unkE260.x = x;
+                dungeon->unkE260.y = y;
+            }
+        }
+    }
+
+    for (x = 0; x < DUNGEON_MAX_SIZE_X; x++) {
+        for (y = 0; y < DUNGEON_MAX_SIZE_Y; y++) {
+            if (y > 4)
+
+            Tile *tile = GetTileSafe(x, y);
+            if (GetTerrainType(tile) == TERRAIN_TYPE_WALL) {
+                tile->terrainType |= TERRAIN_TYPE_IMPASSABLE_WALL;
+            }
+        }
+    }
+
+    if (fixedRoomId != 4) {
+        for (x = 0; x < 17; x++) {
+            for (y = 0; y < 5; y++) {
+                Tile *tile = GetTileSafe(x, y);
+                tile->terrainType |= TERRAIN_TYPE_IMPASSABLE_WALL;
+            }
+        }
+    }
+
+    if (gDungeon->tileset < 64) {
+        for (x = 0; x < DUNGEON_MAX_SIZE_X; x++) {
+            for (y = 0; y < DUNGEON_MAX_SIZE_Y; y++) {
+                Tile *tile = GetTileSafe(x, y);
+                if (GetTerrainType(tile) == TERRAIN_TYPE_WALL) {
+                    tile->terrainType |= TERRAIN_TYPE_IMPASSABLE_WALL;
+                }
+            }
+        }
+    }
+
+    sub_804E9DC();
 }
-*/
 
 //
diff --git a/src/trap_1.c b/src/trap_1.c
index c24259b93..aed00072f 100644
--- a/src/trap_1.c
+++ b/src/trap_1.c
@@ -18,7 +18,7 @@ extern void sub_8082FA8(unkStruct_8094924 *, void *, s32);
 
 void SaveTile(unkStruct_8094924 *r0, Tile *tile);
 void sub_80830F8(void * , void*);
-void sub_808312C(void *, u32 *);
+void sub_808312C(void *, void *);
 void SaveDungeonWeather(unkStruct_8094924 *r0, Weather *weather);
 void sub_8083078(void *, u32);
 void sub_80830B4(void *, u8);