diff --git a/asm/ground_map_1.s b/asm/ground_map_1.s
deleted file mode 100644
index 39710745e..000000000
--- a/asm/ground_map_1.s
+++ /dev/null
@@ -1,1048 +0,0 @@
-	#include "asm/constants/gba_constants.inc"
-	#include "asm/macros.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start sub_80A5204
-sub_80A5204:
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0x18
-	str r0, [sp]
-	mov r8, r1
-	str r2, [sp, 0x4]
-	str r3, [sp, 0x8]
-	movs r1, 0x8
-	ldrsh r0, [r2, r1]
-	cmp r0, 0
-	bgt _080A5222
-	b _080A53EA
-_080A5222:
-	mov r5, r8
-	ldr r2, [sp]
-	mov r12, r2
-	movs r0, 0
-	ldr r3, [sp, 0x4]
-	ldrb r3, [r3, 0x1]
-	str r3, [sp, 0x10]
-	ldr r1, [sp, 0x4]
-	ldrh r2, [r1, 0xA]
-	mov r1, sp
-	strh r2, [r1, 0xC]
-	movs r1, 0xFF
-_080A523A:
-	adds r0, 0x1
-	mov r10, r0
-	movs r3, 0xFF
-	mov r9, r3
-_080A5242:
-	mov r0, r12
-	strb r1, [r0]
-	movs r2, 0x1
-	add r12, r2
-	movs r3, 0x1
-	negs r3, r3
-	add r9, r3
-	mov r0, r9
-	cmp r0, 0
-	bge _080A5242
-	mov r0, r10
-	cmp r0, 0x3
-	ble _080A523A
-	movs r1, 0
-	ldr r2, [sp, 0x10]
-	cmp r1, r2
-	blt _080A5266
-	b _080A53BA
-_080A5266:
-	ldr r3, [sp, 0x4]
-	ldrb r7, [r3]
-_080A526A:
-	adds r0, 0x1
-	mov r10, r0
-	adds r0, r1, 0x1
-	str r0, [sp, 0x14]
-	movs r0, 0xFF
-	movs r2, 0x4
-	mov r9, r2
-_080A5278:
-	mov r3, r12
-	strb r0, [r3]
-	movs r2, 0x1
-	add r12, r2
-	movs r3, 0x1
-	negs r3, r3
-	add r9, r3
-	mov r2, r9
-	cmp r2, 0
-	bge _080A5278
-	movs r3, 0x5
-	mov r9, r3
-	movs r0, 0
-	cmp r1, 0
-	bne _080A5308
-	cmp r1, r7
-	bge _080A5394
-_080A529A:
-	ldrb r1, [r5]
-	adds r5, 0x1
-	cmp r1, 0xBF
-	ble _080A52C2
-	adds r6, r0, 0
-	subs r6, 0xBF
-	cmp r1, 0xBF
-	ble _080A5300
-	adds r2, r1, 0
-	subs r2, 0xBF
-_080A52AE:
-	ldrb r0, [r5]
-	mov r3, r12
-	strb r0, [r3]
-	adds r5, 0x1
-	movs r0, 0x1
-	add r12, r0
-	subs r2, 0x1
-	cmp r2, 0
-	bne _080A52AE
-	b _080A5300
-_080A52C2:
-	cmp r1, 0x7F
-	ble _080A52E6
-	ldrb r4, [r5]
-	adds r5, 0x1
-	adds r6, r0, 0
-	subs r6, 0x7F
-	cmp r1, 0x7F
-	ble _080A5300
-	adds r2, r1, 0
-	subs r2, 0x7F
-_080A52D6:
-	mov r3, r12
-	strb r4, [r3]
-	movs r0, 0x1
-	add r12, r0
-	subs r2, 0x1
-	cmp r2, 0
-	bne _080A52D6
-	b _080A5300
-_080A52E6:
-	movs r2, 0
-	adds r6, r0, 0x1
-	cmp r2, r1
-	bgt _080A5300
-	movs r0, 0
-	adds r2, r1, 0x1
-_080A52F2:
-	mov r3, r12
-	strb r0, [r3]
-	movs r3, 0x1
-	add r12, r3
-	subs r2, 0x1
-	cmp r2, 0
-	bne _080A52F2
-_080A5300:
-	adds r0, r6, r1
-	cmp r0, r7
-	blt _080A529A
-	b _080A5394
-_080A5308:
-	ldr r4, _080A5340
-	add r4, r12
-	cmp r0, r7
-	bge _080A5394
-_080A5310:
-	ldrb r3, [r5]
-	adds r5, 0x1
-	cmp r3, 0xBF
-	ble _080A5344
-	adds r6, r0, 0
-	subs r6, 0xBF
-	cmp r3, 0xBF
-	ble _080A538E
-	adds r2, r3, 0
-	subs r2, 0xBF
-_080A5324:
-	ldrb r1, [r5]
-	ldrb r0, [r4]
-	eors r1, r0
-	mov r0, r12
-	strb r1, [r0]
-	adds r4, 0x1
-	adds r5, 0x1
-	movs r1, 0x1
-	add r12, r1
-	subs r2, 0x1
-	cmp r2, 0
-	bne _080A5324
-	b _080A538E
-	.align 2, 0
-_080A5340: .4byte 0xffffff00
-_080A5344:
-	cmp r3, 0x7F
-	ble _080A5372
-	ldrb r2, [r5]
-	mov r8, r2
-	adds r5, 0x1
-	adds r6, r0, 0
-	subs r6, 0x7F
-	cmp r3, 0x7F
-	ble _080A538E
-	adds r2, r3, 0
-	subs r2, 0x7F
-_080A535A:
-	ldrb r1, [r4]
-	mov r0, r8
-	eors r0, r1
-	mov r1, r12
-	strb r0, [r1]
-	adds r4, 0x1
-	movs r0, 0x1
-	add r12, r0
-	subs r2, 0x1
-	cmp r2, 0
-	bne _080A535A
-	b _080A538E
-_080A5372:
-	movs r2, 0
-	adds r6, r0, 0x1
-	cmp r2, r3
-	bgt _080A538E
-	adds r2, r3, 0x1
-_080A537C:
-	ldrb r0, [r4]
-	mov r1, r12
-	strb r0, [r1]
-	adds r4, 0x1
-	movs r0, 0x1
-	add r12, r0
-	subs r2, 0x1
-	cmp r2, 0
-	bne _080A537C
-_080A538E:
-	adds r0, r6, r3
-	cmp r0, r7
-	blt _080A5310
-_080A5394:
-	add r9, r7
-	mov r1, r9
-	cmp r1, 0xFF
-	bgt _080A53AE
-	movs r0, 0xFF
-_080A539E:
-	mov r2, r12
-	strb r0, [r2]
-	movs r3, 0x1
-	add r12, r3
-	add r9, r3
-	mov r1, r9
-	cmp r1, 0xFF
-	ble _080A539E
-_080A53AE:
-	ldr r1, [sp, 0x14]
-	mov r0, r10
-	ldr r2, [sp, 0x10]
-	cmp r1, r2
-	bge _080A53BA
-	b _080A526A
-_080A53BA:
-	ldr r3, [sp, 0x8]
-	cmp r0, r3
-	bge _080A53E6
-	movs r1, 0xFF
-_080A53C2:
-	adds r0, 0x1
-	mov r10, r0
-	movs r0, 0xFF
-	mov r9, r0
-_080A53CA:
-	mov r2, r12
-	strb r1, [r2]
-	movs r3, 0x1
-	add r12, r3
-	movs r0, 0x1
-	negs r0, r0
-	add r9, r0
-	mov r2, r9
-	cmp r2, 0
-	bge _080A53CA
-	mov r0, r10
-	ldr r3, [sp, 0x8]
-	cmp r0, r3
-	blt _080A53C2
-_080A53E6:
-	mov r8, r5
-	b _080A547E
-_080A53EA:
-	ldr r1, [sp]
-	movs r0, 0
-	ldr r2, [sp, 0x4]
-	ldrb r2, [r2, 0x1]
-	str r2, [sp, 0x10]
-	ldr r3, [sp, 0x4]
-	ldrh r2, [r3, 0xA]
-	mov r3, sp
-	strh r2, [r3, 0xC]
-	movs r6, 0xFF
-_080A53FE:
-	adds r5, r0, 0x1
-	movs r4, 0xFF
-_080A5402:
-	strb r6, [r1]
-	adds r1, 0x1
-	subs r4, 0x1
-	cmp r4, 0
-	bge _080A5402
-	adds r0, r5, 0
-	cmp r0, 0x3
-	ble _080A53FE
-	movs r4, 0
-	ldr r3, [sp, 0x10]
-	cmp r4, r3
-	bge _080A5460
-	ldr r2, [sp, 0x4]
-	ldrb r7, [r2]
-	movs r3, 0xFF
-_080A5420:
-	adds r5, r0, 0x1
-	adds r2, r4, 0x1
-	movs r4, 0x4
-_080A5426:
-	strb r3, [r1]
-	adds r1, 0x1
-	subs r4, 0x1
-	cmp r4, 0
-	bge _080A5426
-	movs r4, 0x5
-	cmp r7, 0
-	beq _080A5444
-	movs r6, 0
-	adds r0, r7, 0
-_080A543A:
-	strb r6, [r1]
-	adds r1, 0x1
-	subs r0, 0x1
-	cmp r0, 0
-	bne _080A543A
-_080A5444:
-	adds r4, r7
-	cmp r4, 0xFF
-	bgt _080A5456
-	movs r0, 0xFF
-_080A544C:
-	strb r0, [r1]
-	adds r1, 0x1
-	adds r4, 0x1
-	cmp r4, 0xFF
-	ble _080A544C
-_080A5456:
-	adds r4, r2, 0
-	adds r0, r5, 0
-	ldr r2, [sp, 0x10]
-	cmp r4, r2
-	blt _080A5420
-_080A5460:
-	ldr r3, [sp, 0x8]
-	cmp r0, r3
-	bge _080A547E
-	movs r6, 0xFF
-_080A5468:
-	adds r5, r0, 0x1
-	movs r4, 0xFF
-_080A546C:
-	strb r6, [r1]
-	adds r1, 0x1
-	subs r4, 0x1
-	cmp r4, 0
-	bge _080A546C
-	adds r0, r5, 0
-	ldr r2, [sp, 0x8]
-	cmp r0, r2
-	blt _080A5468
-_080A547E:
-	mov r3, sp
-	ldrh r3, [r3, 0xC]
-	lsls r0, r3, 16
-	cmp r0, 0
-	bgt _080A548A
-	b _080A5590
-_080A548A:
-	mov r6, r8
-	ldr r0, [sp]
-	movs r1, 0x80
-	lsls r1, 3
-	adds r2, r0, r1
-	movs r0, 0
-	ldr r3, [sp, 0x10]
-	cmp r0, r3
-	bge _080A5586
-	movs r1, 0xFB
-	mov r10, r1
-_080A54A0:
-	adds r2, 0x5
-	movs r4, 0
-	cmp r0, 0
-	bne _080A54EC
-	ldr r3, [sp, 0x4]
-	ldrb r7, [r3]
-	movs r1, 0x1
-	mov r9, r1
-	cmp r0, r7
-	bge _080A5574
-_080A54B4:
-	ldrb r1, [r6]
-	adds r6, 0x1
-	cmp r1, 0x7F
-	ble _080A54DE
-	subs r4, 0x7F
-	cmp r1, 0x7F
-	ble _080A54D6
-	movs r5, 0x80
-	adds r3, r1, 0
-	subs r3, 0x7F
-_080A54C8:
-	ldrb r0, [r2]
-	orrs r0, r5
-	strb r0, [r2]
-	adds r2, 0x1
-	subs r3, 0x1
-	cmp r3, 0
-	bne _080A54C8
-_080A54D6:
-	adds r4, r1
-	ldr r3, [sp, 0x4]
-	ldrb r7, [r3]
-	b _080A54E6
-_080A54DE:
-	adds r0, r1, 0x1
-	adds r2, r0
-	adds r0, r4, 0x1
-	adds r4, r0, r1
-_080A54E6:
-	cmp r4, r7
-	blt _080A54B4
-	b _080A5574
-_080A54EC:
-	ldr r1, _080A5538
-	adds r1, r2
-	mov r12, r1
-	ldr r3, [sp, 0x4]
-	ldrb r7, [r3]
-	adds r0, 0x1
-	mov r9, r0
-	cmp r4, r7
-	bge _080A5574
-_080A54FE:
-	ldrb r5, [r6]
-	adds r6, 0x1
-	cmp r5, 0x7F
-	ble _080A553C
-	subs r4, 0x7F
-	cmp r5, 0x7F
-	ble _080A556A
-	movs r7, 0x80
-	movs r0, 0x80
-	mov r8, r0
-	adds r3, r5, 0
-	subs r3, 0x7F
-_080A5516:
-	mov r0, r12
-	ldrb r1, [r0]
-	mov r0, r8
-	ands r0, r1
-	movs r1, 0x1
-	add r12, r1
-	cmp r0, 0
-	bne _080A552C
-	ldrb r0, [r2]
-	orrs r0, r7
-	strb r0, [r2]
-_080A552C:
-	adds r2, 0x1
-	subs r3, 0x1
-	cmp r3, 0
-	bne _080A5516
-	b _080A556A
-	.align 2, 0
-_080A5538: .4byte 0xffffff00
-_080A553C:
-	movs r3, 0
-	adds r4, 0x1
-	cmp r3, r5
-	bgt _080A556A
-	movs r7, 0x80
-	movs r3, 0x80
-	mov r8, r3
-	adds r3, r5, 0x1
-_080A554C:
-	mov r0, r12
-	ldrb r1, [r0]
-	mov r0, r8
-	ands r0, r1
-	movs r1, 0x1
-	add r12, r1
-	cmp r0, 0
-	beq _080A5562
-	ldrb r0, [r2]
-	orrs r0, r7
-	strb r0, [r2]
-_080A5562:
-	adds r2, 0x1
-	subs r3, 0x1
-	cmp r3, 0
-	bne _080A554C
-_080A556A:
-	adds r4, r5
-	ldr r3, [sp, 0x4]
-	ldrb r7, [r3]
-	cmp r4, r7
-	blt _080A54FE
-_080A5574:
-	mov r1, r10
-	subs r0, r1, r7
-	adds r2, r0
-	mov r0, r9
-	ldr r3, [sp, 0x4]
-	ldrb r3, [r3, 0x1]
-	str r3, [sp, 0x10]
-	cmp r0, r3
-	blt _080A54A0
-_080A5586:
-	mov r8, r6
-	ldr r0, [sp, 0x4]
-	ldrh r1, [r0, 0xA]
-	mov r0, sp
-	strh r1, [r0, 0xC]
-_080A5590:
-	mov r2, sp
-	ldrh r2, [r2, 0xC]
-	lsls r0, r2, 16
-	asrs r0, 16
-	cmp r0, 0x1
-	ble _080A568C
-	mov r6, r8
-	ldr r3, [sp]
-	movs r0, 0x80
-	lsls r0, 3
-	adds r2, r3, r0
-	movs r0, 0
-	b _080A5684
-_080A55AA:
-	adds r2, 0x5
-	movs r4, 0
-	cmp r0, 0
-	bne _080A55F2
-	ldr r3, [sp, 0x4]
-	ldrb r7, [r3]
-	movs r1, 0x1
-	mov r10, r1
-	cmp r0, r7
-	bge _080A567C
-_080A55BE:
-	ldrb r1, [r6]
-	adds r6, 0x1
-	cmp r1, 0x7F
-	ble _080A55E4
-	subs r4, 0x7F
-	cmp r1, 0x7F
-	ble _080A55E0
-	movs r5, 0x40
-	adds r3, r1, 0
-	subs r3, 0x7F
-_080A55D2:
-	ldrb r0, [r2]
-	orrs r0, r5
-	strb r0, [r2]
-	adds r2, 0x1
-	subs r3, 0x1
-	cmp r3, 0
-	bne _080A55D2
-_080A55E0:
-	adds r4, r1
-	b _080A55EC
-_080A55E4:
-	adds r0, r1, 0x1
-	adds r2, r0
-	adds r0, r4, 0x1
-	adds r4, r0, r1
-_080A55EC:
-	cmp r4, r7
-	blt _080A55BE
-	b _080A567C
-_080A55F2:
-	ldr r3, _080A5640
-	adds r3, r2
-	mov r12, r3
-	ldr r1, [sp, 0x4]
-	ldrb r7, [r1]
-	adds r0, 0x1
-	mov r10, r0
-	cmp r4, r7
-	bge _080A567C
-_080A5604:
-	ldrb r5, [r6]
-	adds r6, 0x1
-	cmp r5, 0x7F
-	ble _080A5644
-	subs r4, 0x7F
-	cmp r5, 0x7F
-	ble _080A5676
-	movs r3, 0x40
-	mov r8, r3
-	movs r0, 0x40
-	mov r9, r0
-	adds r3, r5, 0
-	subs r3, 0x7F
-_080A561E:
-	mov r0, r12
-	ldrb r1, [r0]
-	mov r0, r9
-	ands r0, r1
-	movs r1, 0x1
-	add r12, r1
-	cmp r0, 0
-	bne _080A5636
-	ldrb r0, [r2]
-	mov r1, r8
-	orrs r0, r1
-	strb r0, [r2]
-_080A5636:
-	adds r2, 0x1
-	subs r3, 0x1
-	cmp r3, 0
-	bne _080A561E
-	b _080A5676
-	.align 2, 0
-_080A5640: .4byte 0xffffff00
-_080A5644:
-	movs r3, 0
-	adds r4, 0x1
-	cmp r3, r5
-	bgt _080A5676
-	movs r3, 0x40
-	mov r8, r3
-	movs r0, 0x40
-	mov r9, r0
-	adds r3, r5, 0x1
-_080A5656:
-	mov r0, r12
-	ldrb r1, [r0]
-	mov r0, r9
-	ands r0, r1
-	movs r1, 0x1
-	add r12, r1
-	cmp r0, 0
-	beq _080A566E
-	ldrb r0, [r2]
-	mov r1, r8
-	orrs r0, r1
-	strb r0, [r2]
-_080A566E:
-	adds r2, 0x1
-	subs r3, 0x1
-	cmp r3, 0
-	bne _080A5656
-_080A5676:
-	adds r4, r5
-	cmp r4, r7
-	blt _080A5604
-_080A567C:
-	movs r3, 0xFB
-	subs r0, r3, r7
-	adds r2, r0
-	mov r0, r10
-_080A5684:
-	ldr r1, [sp, 0x10]
-	cmp r0, r1
-	blt _080A55AA
-	mov r8, r6
-_080A568C:
-	mov r0, r8
-	add sp, 0x18
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80A5204
-
-	thumb_func_start sub_80A56A0
-sub_80A56A0:
-	push {lr}
-	adds r3, r0, 0
-	adds r2, r1, 0
-	lsls r3, 24
-	lsrs r3, 24
-	lsls r2, 24
-	lsrs r2, 24
-	ldr r0, _080A56BC
-	ldr r0, [r0]
-	adds r1, r3, 0
-	bl sub_80A3B80
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080A56BC: .4byte gGroundMapDungeon_3001B70
-	thumb_func_end sub_80A56A0
-
-	thumb_func_start sub_80A56C0
-sub_80A56C0:
-	push {lr}
-	adds r2, r0, 0
-	ldr r0, _080A56D4
-	ldr r0, [r0]
-	movs r1, 0
-	bl sub_80A4558
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080A56D4: .4byte gGroundMapDungeon_3001B70
-	thumb_func_end sub_80A56C0
-
-	thumb_func_start sub_80A56D8
-sub_80A56D8:
-	push {lr}
-	adds r2, r0, 0
-	ldr r0, _080A56EC
-	ldr r0, [r0]
-	movs r1, 0
-	bl sub_80A456C
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080A56EC: .4byte gGroundMapDungeon_3001B70
-	thumb_func_end sub_80A56D8
-
-	thumb_func_start sub_80A56F0
-sub_80A56F0:
-	ldr r1, _080A5700
-	ldr r2, [r1]
-	adds r2, 0xE8
-	ldr r1, [r0, 0x4]
-	ldr r0, [r0]
-	str r0, [r2]
-	str r1, [r2, 0x4]
-	bx lr
-	.align 2, 0
-_080A5700: .4byte gGroundMapAction
-	thumb_func_end sub_80A56F0
-
-	thumb_func_start sub_80A5704
-sub_80A5704:
-	ldr r1, _080A5724
-	ldr r3, [r1]
-	adds r2, r3, 0
-	adds r2, 0xF8
-	ldr r1, [r0, 0x4]
-	ldr r0, [r0]
-	str r0, [r2]
-	str r1, [r2, 0x4]
-	adds r0, r3, 0
-	adds r0, 0xF0
-	movs r1, 0
-	str r1, [r0]
-	adds r0, 0x4
-	str r1, [r0]
-	bx lr
-	.align 2, 0
-_080A5724: .4byte gGroundMapAction
-	thumb_func_end sub_80A5704
-
-	thumb_func_start sub_80A5728
-sub_80A5728:
-	ldr r0, _080A5734
-	ldr r0, [r0]
-	adds r0, 0xE4
-	movs r1, 0
-	ldrsh r0, [r0, r1]
-	bx lr
-	.align 2, 0
-_080A5734: .4byte gGroundMapAction
-	thumb_func_end sub_80A5728
-
-	thumb_func_start sub_80A5738
-sub_80A5738:
-	ldr r0, _080A5750
-	ldr r0, [r0]
-	adds r0, 0xE4
-	movs r2, 0
-	ldrsh r1, [r0, r2]
-	lsls r0, r1, 1
-	adds r0, r1
-	lsls r0, 2
-	ldr r1, _080A5754
-	adds r0, r1
-	bx lr
-	.align 2, 0
-_080A5750: .4byte gGroundMapAction
-_080A5754: .4byte gGroundMapConversionTable
-	thumb_func_end sub_80A5738
-
-	thumb_func_start sub_80A5758
-sub_80A5758:
-	push {lr}
-	adds r1, r0, 0
-	ldr r0, _080A5768
-	ldr r0, [r0]
-	cmp r0, 0
-	bne _080A576C
-	movs r0, 0
-	b _080A5772
-	.align 2, 0
-_080A5768: .4byte gGroundMapDungeon_3001B70
-_080A576C:
-	bl sub_80A4608
-	movs r0, 0x1
-_080A5772:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80A5758
-
-	thumb_func_start GetCurrentDungeonBounds
-GetCurrentDungeonBounds:
-	push {lr}
-	adds r3, r0, 0
-	adds r2, r1, 0
-	ldr r0, _080A578C
-	ldr r0, [r0]
-	cmp r0, 0
-	bne _080A5790
-	movs r0, 0
-	b _080A5798
-	.align 2, 0
-_080A578C: .4byte gGroundMapDungeon_3001B70
-_080A5790:
-	adds r1, r3, 0
-	bl GetDungeonBounds
-	movs r0, 0x1
-_080A5798:
-	pop {r1}
-	bx r1
-	thumb_func_end GetCurrentDungeonBounds
-
-	thumb_func_start sub_80A579C
-sub_80A579C:
-	push {r4-r7,lr}
-	adds r6, r0, 0
-	adds r5, r1, 0
-	ldr r0, _080A5838
-	ldr r3, [r0]
-	cmp r3, 0
-	beq _080A5854
-	ldr r0, _080A583C
-	ldr r0, [r0]
-	adds r2, r0, 0
-	adds r2, 0xE4
-	movs r0, 0
-	ldrsh r1, [r2, r0]
-	movs r0, 0x1
-	negs r0, r0
-	cmp r1, r0
-	beq _080A5854
-	adds r0, r1, 0
-	lsls r4, r0, 1
-	adds r4, r0
-	lsls r4, 2
-	ldr r0, _080A5840
-	adds r4, r0
-	adds r0, r3, 0
-	adds r1, r6, 0
-	adds r2, r5, 0
-	bl GetDungeonBounds
-	ldr r2, [r6]
-	mov r12, r2
-	movs r0, 0xF0
-	lsls r0, 7
-	add r0, r12
-	str r0, [r6]
-	ldr r3, [r6, 0x4]
-	movs r7, 0xA0
-	lsls r7, 7
-	adds r0, r3, r7
-	str r0, [r6, 0x4]
-	ldr r2, [r5]
-	ldr r1, _080A5844
-	adds r0, r2, r1
-	str r0, [r5]
-	ldr r1, [r5, 0x4]
-	ldr r7, _080A5848
-	adds r0, r1, r7
-	str r0, [r5, 0x4]
-	movs r7, 0
-	ldrsh r0, [r4, r7]
-	cmp r0, 0xA
-	bne _080A581E
-	movs r0, 0x90
-	lsls r0, 8
-	add r0, r12
-	str r0, [r6]
-	movs r4, 0xD0
-	lsls r4, 7
-	adds r0, r3, r4
-	str r0, [r6, 0x4]
-	ldr r7, _080A584C
-	adds r0, r2, r7
-	str r0, [r5]
-	ldr r2, _080A5850
-	adds r0, r1, r2
-	str r0, [r5, 0x4]
-_080A581E:
-	ldr r1, [r6]
-	ldr r0, [r5]
-	cmp r1, r0
-	ble _080A5828
-	str r1, [r5]
-_080A5828:
-	ldr r1, [r6, 0x4]
-	ldr r0, [r5, 0x4]
-	cmp r1, r0
-	ble _080A5832
-	str r1, [r5, 0x4]
-_080A5832:
-	movs r0, 0x1
-	b _080A5856
-	.align 2, 0
-_080A5838: .4byte gGroundMapDungeon_3001B70
-_080A583C: .4byte gGroundMapAction
-_080A5840: .4byte gGroundMapConversionTable
-_080A5844: .4byte 0xffff8800
-_080A5848: .4byte 0xffffb000
-_080A584C: .4byte 0xffff7000
-_080A5850: .4byte 0xffff9800
-_080A5854:
-	movs r0, 0
-_080A5856:
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80A579C
-
-	thumb_func_start CheckMapCollision_80A585C
-CheckMapCollision_80A585C:
-	push {r4-r7,lr}
-	adds r7, r1, 0
-	ldr r1, _080A5884
-	ldr r2, [r1]
-	ldr r1, _080A5888
-	adds r2, r1
-	ldr r1, [r0, 0x4]
-	lsls r1, 8
-	ldr r0, [r0]
-	adds r1, r0
-	ldr r0, _080A588C
-	adds r1, r0
-	ldr r0, [r2]
-	adds r5, r0, r1
-	ldr r4, [r7, 0x4]
-	cmp r0, 0
-	bne _080A5890
-_080A587E:
-	movs r0, 0x1
-	b _080A58C0
-	.align 2, 0
-_080A5884: .4byte gGroundMapDungeon_3001B70
-_080A5888: .4byte 0x00000544
-_080A588C: .4byte 0x00000405
-_080A5890:
-	cmp r4, 0
-	ble _080A58BE
-	movs r1, 0x80
-	lsls r1, 1
-	mov r12, r1
-_080A589A:
-	ldr r2, [r7]
-	adds r3, r5, 0
-	cmp r2, 0
-	ble _080A58B6
-	movs r6, 0x80
-_080A58A4:
-	ldrb r1, [r3]
-	adds r0, r6, 0
-	ands r0, r1
-	adds r3, 0x1
-	cmp r0, 0
-	bne _080A587E
-	subs r2, 0x1
-	cmp r2, 0
-	bgt _080A58A4
-_080A58B6:
-	add r5, r12
-	subs r4, 0x1
-	cmp r4, 0
-	bgt _080A589A
-_080A58BE:
-	movs r0, 0
-_080A58C0:
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end CheckMapCollision_80A585C
-
-	thumb_func_start sub_80A58C8
-sub_80A58C8:
-	push {r4-r7,lr}
-	adds r7, r1, 0
-	ldr r1, _080A58F0
-	ldr r2, [r1]
-	ldr r1, _080A58F4
-	adds r2, r1
-	ldr r1, [r0, 0x4]
-	lsls r1, 8
-	ldr r0, [r0]
-	adds r1, r0
-	ldr r0, _080A58F8
-	adds r1, r0
-	ldr r0, [r2]
-	adds r5, r0, r1
-	ldr r4, [r7, 0x4]
-	cmp r0, 0
-	bne _080A58FC
-_080A58EA:
-	movs r0, 0x1
-	b _080A592C
-	.align 2, 0
-_080A58F0: .4byte gGroundMapDungeon_3001B70
-_080A58F4: .4byte 0x00000544
-_080A58F8: .4byte 0x00000405
-_080A58FC:
-	cmp r4, 0
-	ble _080A592A
-	movs r1, 0x80
-	lsls r1, 1
-	mov r12, r1
-_080A5906:
-	ldr r2, [r7]
-	adds r3, r5, 0
-	cmp r2, 0
-	ble _080A5922
-	movs r6, 0x40
-_080A5910:
-	ldrb r1, [r3]
-	adds r0, r6, 0
-	ands r0, r1
-	adds r3, 0x1
-	cmp r0, 0
-	bne _080A58EA
-	subs r2, 0x1
-	cmp r2, 0
-	bgt _080A5910
-_080A5922:
-	add r5, r12
-	subs r4, 0x1
-	cmp r4, 0
-	bgt _080A5906
-_080A592A:
-	movs r0, 0
-_080A592C:
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80A58C8
-
-        .align 2,0
diff --git a/include/ground_bg.h b/include/ground_bg.h
index 43de6aff1..757b7ad1b 100644
--- a/include/ground_bg.h
+++ b/include/ground_bg.h
@@ -6,9 +6,20 @@
 
 void GroundBg_Init(GroundBg *groundBg, const SubStruct_52C *a1);
 void GroundBg_FreeAll(GroundBg *groundBg);
+void sub_80A2D68(GroundBg *groundBg);
+void sub_80A2D88(GroundBg *groundBg);
 void sub_80A2FBC(GroundBg *groundBg, s32 mapFileId_);
 void sub_80A3440(GroundBg *groundBg, s32 mapFileId_, const DungeonLocation *dungLoc, s32 a3);
 void sub_80A3B80(GroundBg *groundBg, u8 a1, u8 a2);
 void sub_80A3BB0(GroundBg *groundBg, s32 a0_);
+void sub_80A4558(GroundBg *groundBg, s32 id, PixelPos *dstPos);
+void sub_80A456C(GroundBg *groundBg, s32 id, const PixelPos *srcPos);
+void sub_80A4580(GroundBg *groundBg, s32 id, PixelPos *pixPos);
+void sub_80A4608(GroundBg *groundBg, PixelPos *dstPos);
+u16 sub_80A4720(GroundBg *groundBg, s32 id, PixelPos *pixPos);
+void sub_80A4740(GroundBg *groundBg, s32 id, PixelPos *pixPos, u32 dstVal);
+void sub_80A4764(GroundBg *groundBg);
+void sub_80A49E8(GroundBg *groundBg);
+void GetDungeonBounds(GroundBg *groundBg, PixelPos *dstPos1, PixelPos *dstPos2);
 
 #endif // GUARD_GROUND_BG_H
diff --git a/include/ground_map.h b/include/ground_map.h
index 35c2ec7f3..2f9df06a1 100644
--- a/include/ground_map.h
+++ b/include/ground_map.h
@@ -1,11 +1,22 @@
 #ifndef GUARD_GROUND_MAP_H
 #define GUARD_GROUND_MAP_H
 
+#include "structs/str_position.h"
+
 void GroundMap_Reset(void);
 void AllocGroundMapAction(void);
 void FreeGroundMapAction(void);
 void sub_80A4B38(void);
 void sub_80A4B54(void);
+void sub_80A56C0(PixelPos *pos);
 s16 GetAdjustedGroundMap(s32 mapId);
+s16 GetGroundMapID(void);
+
+void GroundMap_ExecuteEnter(s16);
+void GroundMap_ExecuteEvent(s16 scriptIndex, u32);
+void GroundMap_ExecuteStation(s32 _map, s32 _group, s32 _sector, bool32 _setScriptState);
+bool8 GroundMapNotifyAll(s16);
+bool8 sub_80A4D48(s16 index);
+void GroundMap_Action(void);
 
 #endif // GUARD_GROUND_MAP_H
diff --git a/include/ground_map_1.h b/include/ground_map_1.h
index 9000d073e..c725b3a82 100644
--- a/include/ground_map_1.h
+++ b/include/ground_map_1.h
@@ -1,14 +1,31 @@
 #ifndef GUARD_GROUND_MAP_1_H
 #define GUARD_GROUND_MAP_1_H
 
-void GroundMap_ExecuteEnter(s16);
-void GroundMap_ExecuteEvent(s16 scriptIndex, u32);
-void GroundMap_ExecuteStation(s32 _map, s32 _group, s32 _sector, bool32 _setScriptState);
+// size: 0x24
+#include "structs/str_position.h"
 
-bool8 GroundMapNotifyAll(s16);
-bool8 sub_80A4D48(s16 index);
+typedef struct unkStruct_3001B74
+{
+    s16 unk0;
+    u8 unk2;
+    s32 unk4;
+    s32 unk8;
+    PixelPos unkC;
+    u32 unk14;
+    u32 unk18;
+    u32 unk1C;
+    u32 unk20;
+} unkStruct_3001B74;
 
-// ground_map_1.s
-extern s16 sub_80A5728(void);
+void GroundWeather_Select(s16);
+void nullsub_121(void);
+void nullsub_122(void);
+void nullsub_123(void);
+
+void sub_80A5E70(void);
+void sub_80A5E8C(u8);
+void sub_80A5EBC(void);
+void sub_80A5EDC(u8);
+void sub_80A60D8(void);
 
 #endif // GUARD_GROUND_MAP_1_H
diff --git a/include/ground_map_2.h b/include/ground_map_2.h
deleted file mode 100644
index 1015be5d1..000000000
--- a/include/ground_map_2.h
+++ /dev/null
@@ -1,30 +0,0 @@
-#ifndef GUARD_GROUND_MAP_2_H
-#define GUARD_GROUND_MAP_2_H
-
-// size: 0x24
-typedef struct unkStruct_3001B74
-{
-    s16 unk0;
-    u8 unk2;
-    s32 unk4;
-    s32 unk8;
-    s32 unkC;
-    s32 unk10;
-    u32 unk14;
-    u32 unk18;
-    u32 unk1C;
-    u32 unk20;
-} unkStruct_3001B74;
-
-void GroundWeather_Select(s16);
-void nullsub_121(void);
-void nullsub_122(void);
-void nullsub_123(void);
-
-void sub_80A5E70(void);
-void sub_80A5E8C(u8);
-void sub_80A5EBC(void);
-void sub_80A5EDC(u8);
-void sub_80A60D8(void);
-
-#endif // GUARD_GROUND_MAP_2_H
diff --git a/include/ground_script_file.h b/include/ground_script_file.h
new file mode 100644
index 000000000..d3ff12d99
--- /dev/null
+++ b/include/ground_script_file.h
@@ -0,0 +1,9 @@
+#ifndef INCLUDE_GROUND_SCRIPT_FILE_H
+#define INCLUDE_GROUND_SCRIPT_FILE_H 
+
+void sub_80A7744(void);
+void sub_80A7754(void);
+bool8 ChangeScriptFile(s16 a0);
+const struct GroundScriptHeader *GetGroundScript(s16 mapId, const DebugLocation *unused);
+
+#endif /* INCLUDE_GROUND_SCRIPT_FILE_H */
diff --git a/include/structs/str_ground_script.h b/include/structs/str_ground_script.h
index 4296e0684..a31a5f6ac 100644
--- a/include/structs/str_ground_script.h
+++ b/include/structs/str_ground_script.h
@@ -117,8 +117,7 @@ typedef struct GroundMapAction
     /* 0x00 */ Action action;
     /* 0xE4 */ s16 groundMapId;
                u16 fillE6;
-               u32 unkE8;
-               u32 unkEC;
+               PixelPos unkE8;
                s32 unkF0;
                s32 unkF4;
                PixelPos unkF8;
diff --git a/ld_script.ld b/ld_script.ld
index ec8afa19d..43a8034e3 100755
--- a/ld_script.ld
+++ b/ld_script.ld
@@ -45,7 +45,8 @@ SECTIONS {
     .text :
     ALIGN(4)
     {
-        asm/crt0.o(.text);
+        src/rom_header.o(.text);
+        src/crt0.o(.text);
         src/code_80001DC.o(.text);
         src/arm_funcs.o(.text);
         src/main_loops.o(.text);
@@ -345,9 +346,7 @@ SECTIONS {
         src/ground_place.o(.text);
         src/ground_bg.o(.text);
         src/ground_map.o(.text);
-        asm/ground_map_1.o(.text);
         src/ground_map_1.o(.text);
-        src/ground_map_2.o(.text);
         src/ground_sprite.o(.text);
         src/ground_sprite_data.o(.text);
         src/ground_sprite_monster.o(.text);
diff --git a/ld_script_modern.ld b/ld_script_modern.ld
index 7ec57d5ea..fbc3255a1 100644
--- a/ld_script_modern.ld
+++ b/ld_script_modern.ld
@@ -39,7 +39,8 @@ SECTIONS {
     .text :
     ALIGN(4)
     {
-        asm/crt0.o(.text);
+        src/rom_header.o(.text);
+        src/crt0.o(.text);
         src/code_80001DC.o(.text);
         src/main_loops.o(.text);
         src/*.o(.text*);
diff --git a/src/code_801D014.c b/src/code_801D014.c
index 4ee49f395..7b36fb649 100644
--- a/src/code_801D014.c
+++ b/src/code_801D014.c
@@ -16,7 +16,7 @@
 #include "friend_list_menu.h"
 #include "ground_lives.h"
 #include "ground_main.h"
-#include "ground_map_1.h"
+#include "ground_map.h"
 #include "input.h"
 #include "iq_skill_menu.h"
 #include "memory.h"
@@ -82,7 +82,7 @@ bool8 sub_801D014(Pokemon *a0)
     else
         sUnknown_203B250->index = NUM_MONSTERS;
 
-    sUnknown_203B250->currFriendAreaLocation = MapIdToFriendAreaId(sub_80A5728());
+    sUnknown_203B250->currFriendAreaLocation = MapIdToFriendAreaId(GetGroundMapID());
     sUnknown_203B250->unk8 = 0;
     sUnknown_203B250->unk9 = 0;
     sUnknown_203B250->unkC = GetPlayerPokemonStruct();
diff --git a/asm/crt0.s b/src/crt0.s
similarity index 96%
rename from asm/crt0.s
rename to src/crt0.s
index ac6b51509..2099d2d50 100644
--- a/asm/crt0.s
+++ b/src/crt0.s
@@ -2,18 +2,10 @@
 
 	.syntax unified
 
-	.global Start
 
 	.text
 
 	.arm
-
-Start: @ 8000000
-	b Init
-
-	#include "rom_header.inc"
-
-	.arm
 	.align 2, 0
 	.global Init
 Init: @ 80000C0
diff --git a/src/debug_field_map.c b/src/debug_field_map.c
index 0cc0fe887..a21e8f643 100644
--- a/src/debug_field_map.c
+++ b/src/debug_field_map.c
@@ -10,7 +10,7 @@
 #include "text_2.h"
 #include "text_3.h"
 #include "ground_map.h"
-#include "ground_map_2.h"
+#include "ground_map_1.h"
 #include "palette_util.h"
 #include "string_format.h"
 #include "sprite.h"
diff --git a/src/friend_list.c b/src/friend_list.c
index 4776e7e7a..3e6e958ff 100644
--- a/src/friend_list.c
+++ b/src/friend_list.c
@@ -14,7 +14,7 @@
 #include "rescue_team_info.h"
 #include "input.h"
 #include "memory.h"
-#include "ground_map_1.h"
+#include "ground_map.h"
 #include "constants/input.h"
 
 extern bool8 sub_808D750(s32 index_);
@@ -95,7 +95,7 @@ bool8 FriendList_Init(u32 r5, u32 windowId, DungeonPos *pos, u32 r10)
     }
 
     if (sFriendList->unk0 == 4) {
-        sFriendList->unk354 = MapIdToFriendAreaId(sub_80A5728());
+        sFriendList->unk354 = MapIdToFriendAreaId(GetGroundMapID());
     }
     else {
         sFriendList->unk354 = 0;
diff --git a/src/friend_list_menu.c b/src/friend_list_menu.c
index 1d2f0e031..dc10d1686 100644
--- a/src/friend_list_menu.c
+++ b/src/friend_list_menu.c
@@ -12,7 +12,7 @@
 #include "common_strings.h"
 #include "event_flag.h"
 #include "friend_list_menu.h"
-#include "ground_map_1.h"
+#include "ground_map.h"
 #include "input.h"
 #include "iq_skill_menu.h"
 #include "items.h"
@@ -62,7 +62,7 @@ bool8 CreateFriendListMenu(s32 param_1)
     gUnknown_203B2B4 = MemoryAlloc(sizeof(unkStruct_203B2B4),8);
     gUnknown_203B2B4->menuAction1 = 0;
     gUnknown_203B2B4->unk0 = param_1;
-    gUnknown_203B2B4->unkC = MapIdToFriendAreaId(sub_80A5728());
+    gUnknown_203B2B4->unkC = MapIdToFriendAreaId(GetGroundMapID());
     gUnknown_203B2B4->unkD = 0;
     if (gUnknown_203B2B4->unk0 == 2) {
       SetFriendListMenuState(0);
diff --git a/src/ground_bg.c b/src/ground_bg.c
index 263cec9f1..e8b1bac5c 100644
--- a/src/ground_bg.c
+++ b/src/ground_bg.c
@@ -18,7 +18,6 @@
 
 extern const FileArchive gGroundFileArchive;
 
-void sub_80A456C(GroundBg *groundBg, s32 id, const PixelPos *srcPos);
 static void CloseOpenedFiles(GroundBg *groundBg);
 static void sub_80A3EB0(SubStruct_488 *map488);
 static const u8 *sub_80A3908(u16 **dstArray, const void *src_, SubStruct_52C *a2, SubStruct_448 *a3);
diff --git a/src/ground_main.c b/src/ground_main.c
index ad8863f45..8fe0f3c0f 100644
--- a/src/ground_main.c
+++ b/src/ground_main.c
@@ -13,12 +13,14 @@
 #include "debug.h"
 #include "event_flag.h"
 #include "ground_main.h"
-#include "ground_map_2.h"
+#include "ground_map.h"
+#include "ground_map_1.h"
 #include "play_time.h"
 #include "pokemon.h"
 #include "text_util.h"
 #include "ground_map_conversion_table.h"
 #include "ground_lives_helper.h"
+#include "ground_script_file.h"
 #include "script_item.h"
 #include "unk_ds_only_feature.h"
 #include "textbox.h"
@@ -68,24 +70,20 @@ extern bool8 sub_809AFAC(void);
 extern bool8 sub_80048BC(void);
 extern u8 sub_80023E4(u32);
 extern bool8 sub_8099B94(void);
-extern void FreeGroundMapAction(void);
 extern void FreeGroundLives(void);
 extern void FreeGroundObjects(void);
 extern void FreeGroundEffects(void);
 extern void FreeGroundEvents(void);
 extern void sub_80A658C(void);
 extern void sub_809D508(void);
-extern void sub_80A7754(void);
 extern void nullsub_119(void);
 extern void sub_8099768(void);
 extern void nullsub_103(void);
 extern void sub_8099648(void);
 extern void sub_809975C(void);
 extern void sub_809D0AC(void);
-extern void sub_80A7744(void);
 extern void sub_809D490(void);
 extern void sub_80A62F0(void);
-extern void AllocGroundMapAction(void);
 extern void AllocGroundEvents(void);
 extern void AllocGroundLives(void);
 extern void AllocGroundObjects(void);
@@ -109,7 +107,6 @@ extern void sub_80A5E70(void);
 extern void sub_809B638(void);
 extern void sub_80A73EC(void);
 extern void sub_8099750(void);
-extern void GroundMap_Reset(void);
 extern void sub_809D0BC(void);
 extern void DeleteGroundEvents(void);
 extern void DeleteGroundLives(void);
@@ -121,9 +118,7 @@ extern void xxx_call_update_bg_sound_input(void);
 extern void sub_80A6E68(void);
 extern void sub_80060EC(void);
 extern void sub_809977C(void);
-extern void GroundMap_ExecuteEvent(s32, u32);
 extern void UpdateFadeInTile(s32);
-extern void GroundMap_Action(void);
 extern void sub_8098C58(void);
 extern void sub_8001D88(void);
 extern u32 GroundMainGameCancelRequest(u32 r0);
diff --git a/src/ground_map.c b/src/ground_map.c
index c5ab861a7..d8d4009f5 100644
--- a/src/ground_map.c
+++ b/src/ground_map.c
@@ -4,8 +4,9 @@
 #include "ground_bg.h"
 #include "ground_main.h"
 #include "ground_map.h"
-#include "ground_map_2.h"
+#include "ground_map_1.h"
 #include "ground_script.h"
+#include "ground_script_file.h"
 #include "memory.h"
 #include "ground_map_conversion_table.h"
 #include "code_800558C.h"
@@ -14,34 +15,53 @@
 IWRAM_INIT GroundMapAction *gGroundMapAction = {NULL};
 IWRAM_INIT GroundBg *gGroundMapDungeon_3001B70 = {NULL};
 
-extern GroundMapAction *gGroundMapAction;
-
 extern const SubStruct_52C gUnknown_8117324;
-extern const SubStruct_52C gUnknown_8117354;
 extern const SubStruct_52C gUnknown_811733C;
-extern const u8 gUnknown_81176A4[];
-extern const u8 gUnknown_8117700[];
+extern const SubStruct_52C gUnknown_8117354;
+
+struct MapToDungeonStruct
+{
+    s16 id;
+    DungeonLocation loc;
+    u32 unk8;
+};
+
+extern const struct MapToDungeonStruct gUnknown_81173C0[];
+
+extern const DebugLocation gUnknown_8117538[];
+extern const DebugLocation gUnknown_8117560;
+extern const u8 gUnknown_811756C[];
 extern const u8 gUnknown_8117594[];
-extern const u8 gUnknown_81175EC[];
 extern const DebugLocation gUnknown_81175E0;
+extern const u8 gUnknown_81175EC[];
 extern const DebugLocation gUnknown_8117644;
 extern const u8 gUnknown_8117650[];
 extern const DebugLocation gUnknown_8117698;
+extern const u8 gUnknown_81176A4[];
+extern const DebugLocation gUnknown_81176D0;
+extern const u8 gUnknown_81176DC[];
+extern const PixelPos gUnknown_81176F8;
+extern const u8 gUnknown_8117700[];
+extern const DebugLocation gUnknown_8117734;
+extern const u8 gUnknown_8117740[];
+extern const PixelPos gUnknown_8117754;
+extern const DebugLocation gUnknown_8117770;
 
-bool8 ChangeScriptFile(s32 a0);
-const struct GroundScriptHeader *GetGroundScript(s32 a0, DebugLocation *);
-
-extern DebugLocation gUnknown_8117560;
-extern const u8 gUnknown_811756C[];
-
-extern u8 sub_809D678(void *);
-extern bool8 GroundScriptNotify(void *, s32);
 
 extern const CallbackData gGroundScriptNullCallbacks;
-extern const DebugLocation gUnknown_8117538[];
 
-extern void sub_80A2D68(GroundBg *);
-extern void sub_80A2D88(GroundBg *);
+extern u8 sub_809D248(PixelPos *r0);
+
+extern bool8 sub_809D678(Action *);
+extern bool8 GroundScriptNotify(Action*, s32);
+
+extern u8 sub_80A46C0(GroundBg *, u32, s32, s32);
+extern u8 sub_80A4660(GroundBg *, u32, s32, s32);
+
+extern s16 HandleAction(Action *action, const DebugLocation *debug);
+
+void GroundMap_SelectDungeon(s32 mapId, const DungeonLocation *loc, u32 param_2);
+void sub_80A56D8(const PixelPos*);
 
 void AllocGroundMapAction(void)
 {
@@ -170,7 +190,7 @@ void GroundMap_ExecuteEnter(s16 param_1)
     GroundScript_ExecutePP(&gGroundMapAction->action, 0, &script, &gUnknown_8117698);
 }
 
-UNUSED static u8 sub_80A4D14(void)
+UNUSED static bool8 sub_80A4D14(void)
 {
     return sub_809D678(&gGroundMapAction->action);
 }
@@ -208,24 +228,6 @@ s16 GetAdjustedGroundMap(s32 mapId)
     return retMapId;
 }
 
-struct MapToDungeonStruct
-{
-    s16 id;
-    DungeonLocation loc;
-    u32 unk8;
-};
-
-extern const struct MapToDungeonStruct gUnknown_81173C0[];
-extern const u8 gUnknown_81176DC[];
-extern const u8 gUnknown_8117740[];
-extern const DebugLocation gUnknown_81176D0;
-extern const DebugLocation gUnknown_8117734;
-extern const u32 gUnknown_81176F8[];
-extern const u32 gUnknown_8117754[];
-
-void GroundMap_SelectDungeon(s32 mapId, const DungeonLocation *loc, u32 param_2);
-void sub_80A56D8(const void *);
-
 void GroundMap_Select(s32 mapId_)
 {
     const GroundConversionStruct *ptr;
@@ -277,8 +279,8 @@ void GroundMap_Select(s32 mapId_)
     }
 
     sub_80A2FBC(gGroundMapDungeon_3001B70, ptr->mapFileTableId);
-    gGroundMapAction->unkE8 = 0;
-    gGroundMapAction->unkEC = 0;
+    gGroundMapAction->unkE8.x = 0;
+    gGroundMapAction->unkE8.y = 0;
     gGroundMapAction->unkF0 = 0;
     gGroundMapAction->unkF4 = 0;
     gGroundMapAction->unkF8.x = 0;
@@ -368,8 +370,8 @@ void GroundMap_SelectDungeon(s32 mapId_, const DungeonLocation *loc, u32 param_2
     GroundBg_Init(gGroundMapDungeon_3001B70, &gUnknown_8117354);
     sub_80A5EDC(1);
     sub_80A3440(gGroundMapDungeon_3001B70, ptr->mapFileTableId, loc, param_2);
-    gGroundMapAction->unkE8 = 0;
-    gGroundMapAction->unkEC = 0;
+    gGroundMapAction->unkE8.x = 0;
+    gGroundMapAction->unkE8.y = 0;
     gGroundMapAction->unkF0 = 0;
     gGroundMapAction->unkF4 = 0;
     gGroundMapAction->unkF8.x = 0;
@@ -378,3 +380,999 @@ void GroundMap_SelectDungeon(s32 mapId_, const DungeonLocation *loc, u32 param_2
 
     sub_80A56D8(&gUnknown_8117754);
 }
+
+NAKED
+void sub_80A5204(void)
+{
+    asm_unified(
+"	push {r4-r7,lr}     \n"
+"	mov r7, r10         \n"
+"	mov r6, r9          \n"
+"	mov r5, r8          \n"
+"	push {r5-r7}        \n"
+"	sub sp, 0x18        \n"
+"	str r0, [sp]        \n"
+"	mov r8, r1          \n"
+"	str r2, [sp, 0x4]   \n"
+"	str r3, [sp, 0x8]   \n"
+"	movs r1, 0x8        \n"
+"	ldrsh r0, [r2, r1]  \n"
+"	cmp r0, 0           \n"
+"	bgt _080A5222       \n"
+"	b _080A53EA         \n"
+"_080A5222:             \n"
+"	mov r5, r8          \n"
+"	ldr r2, [sp]        \n"
+"	mov r12, r2         \n"
+"	movs r0, 0          \n"
+"	ldr r3, [sp, 0x4]   \n"
+"	ldrb r3, [r3, 0x1]  \n"
+"	str r3, [sp, 0x10]  \n"
+"	ldr r1, [sp, 0x4]   \n"
+"	ldrh r2, [r1, 0xA]  \n"
+"	mov r1, sp          \n"
+"	strh r2, [r1, 0xC]  \n"
+"	movs r1, 0xFF       \n"
+"_080A523A:             \n"
+"	adds r0, 0x1        \n"
+"	mov r10, r0         \n"
+"	movs r3, 0xFF       \n"
+"	mov r9, r3          \n"
+"_080A5242:             \n"
+"	mov r0, r12         \n"
+"	strb r1, [r0]       \n"
+"	movs r2, 0x1        \n"
+"	add r12, r2         \n"
+"	movs r3, 0x1        \n"
+"	negs r3, r3         \n"
+"	add r9, r3          \n"
+"	mov r0, r9          \n"
+"	cmp r0, 0           \n"
+"	bge _080A5242       \n"
+"	mov r0, r10         \n"
+"	cmp r0, 0x3         \n"
+"	ble _080A523A       \n"
+"	movs r1, 0          \n"
+"	ldr r2, [sp, 0x10]  \n"
+"	cmp r1, r2          \n"
+"	blt _080A5266       \n"
+"	b _080A53BA         \n"
+"_080A5266:             \n"
+"	ldr r3, [sp, 0x4]   \n"
+"	ldrb r7, [r3]       \n"
+"_080A526A:             \n"
+"	adds r0, 0x1        \n"
+"	mov r10, r0         \n"
+"	adds r0, r1, 0x1    \n"
+"	str r0, [sp, 0x14]  \n"
+"	movs r0, 0xFF       \n"
+"	movs r2, 0x4        \n"
+"	mov r9, r2          \n"
+"_080A5278:             \n"
+"	mov r3, r12         \n"
+"	strb r0, [r3]       \n"
+"	movs r2, 0x1        \n"
+"	add r12, r2         \n"
+"	movs r3, 0x1        \n"
+"	negs r3, r3         \n"
+"	add r9, r3          \n"
+"	mov r2, r9          \n"
+"	cmp r2, 0           \n"
+"	bge _080A5278       \n"
+"	movs r3, 0x5        \n"
+"	mov r9, r3          \n"
+"	movs r0, 0          \n"
+"	cmp r1, 0           \n"
+"	bne _080A5308       \n"
+"	cmp r1, r7          \n"
+"	bge _080A5394       \n"
+"_080A529A:             \n"
+"	ldrb r1, [r5]       \n"
+"	adds r5, 0x1        \n"
+"	cmp r1, 0xBF        \n"
+"	ble _080A52C2       \n"
+"	adds r6, r0, 0      \n"
+"	subs r6, 0xBF       \n"
+"	cmp r1, 0xBF        \n"
+"	ble _080A5300       \n"
+"	adds r2, r1, 0      \n"
+"	subs r2, 0xBF       \n"
+"_080A52AE:             \n"
+"	ldrb r0, [r5]       \n"
+"	mov r3, r12         \n"
+"	strb r0, [r3]       \n"
+"	adds r5, 0x1        \n"
+"	movs r0, 0x1        \n"
+"	add r12, r0         \n"
+"	subs r2, 0x1        \n"
+"	cmp r2, 0           \n"
+"	bne _080A52AE       \n"
+"	b _080A5300         \n"
+"_080A52C2:             \n"
+"	cmp r1, 0x7F        \n"
+"	ble _080A52E6       \n"
+"	ldrb r4, [r5]       \n"
+"	adds r5, 0x1        \n"
+"	adds r6, r0, 0      \n"
+"	subs r6, 0x7F       \n"
+"	cmp r1, 0x7F        \n"
+"	ble _080A5300       \n"
+"	adds r2, r1, 0      \n"
+"	subs r2, 0x7F       \n"
+"_080A52D6:             \n"
+"	mov r3, r12         \n"
+"	strb r4, [r3]       \n"
+"	movs r0, 0x1        \n"
+"	add r12, r0         \n"
+"	subs r2, 0x1        \n"
+"	cmp r2, 0           \n"
+"	bne _080A52D6       \n"
+"	b _080A5300         \n"
+"_080A52E6:             \n"
+"	movs r2, 0          \n"
+"	adds r6, r0, 0x1    \n"
+"	cmp r2, r1          \n"
+"	bgt _080A5300       \n"
+"	movs r0, 0          \n"
+"	adds r2, r1, 0x1    \n"
+"_080A52F2:             \n"
+"	mov r3, r12         \n"
+"	strb r0, [r3]       \n"
+"	movs r3, 0x1        \n"
+"	add r12, r3         \n"
+"	subs r2, 0x1        \n"
+"	cmp r2, 0           \n"
+"	bne _080A52F2       \n"
+"_080A5300:             \n"
+"	adds r0, r6, r1     \n"
+"	cmp r0, r7          \n"
+"	blt _080A529A       \n"
+"	b _080A5394         \n"
+"_080A5308:             \n"
+"	ldr r4, _080A5340   \n"
+"	add r4, r12         \n"
+"	cmp r0, r7          \n"
+"	bge _080A5394       \n"
+"_080A5310:             \n"
+"	ldrb r3, [r5]       \n"
+"	adds r5, 0x1        \n"
+"	cmp r3, 0xBF        \n"
+"	ble _080A5344       \n"
+"	adds r6, r0, 0      \n"
+"	subs r6, 0xBF       \n"
+"	cmp r3, 0xBF        \n"
+"	ble _080A538E       \n"
+"	adds r2, r3, 0      \n"
+"	subs r2, 0xBF       \n"
+"_080A5324:             \n"
+"	ldrb r1, [r5]       \n"
+"	ldrb r0, [r4]       \n"
+"	eors r1, r0         \n"
+"	mov r0, r12         \n"
+"	strb r1, [r0]       \n"
+"	adds r4, 0x1        \n"
+"	adds r5, 0x1        \n"
+"	movs r1, 0x1        \n"
+"	add r12, r1         \n"
+"	subs r2, 0x1        \n"
+"	cmp r2, 0           \n"
+"	bne _080A5324       \n"
+"	b _080A538E         \n"
+"	.align 2, 0         \n"
+"_080A5340: .4byte 0xffffff00\n"
+"_080A5344:             \n"
+"	cmp r3, 0x7F        \n"
+"	ble _080A5372       \n"
+"	ldrb r2, [r5]       \n"
+"	mov r8, r2          \n"
+"	adds r5, 0x1        \n"
+"	adds r6, r0, 0      \n"
+"	subs r6, 0x7F       \n"
+"	cmp r3, 0x7F        \n"
+"	ble _080A538E       \n"
+"	adds r2, r3, 0      \n"
+"	subs r2, 0x7F       \n"
+"_080A535A:             \n"
+"	ldrb r1, [r4]       \n"
+"	mov r0, r8          \n"
+"	eors r0, r1         \n"
+"	mov r1, r12         \n"
+"	strb r0, [r1]       \n"
+"	adds r4, 0x1        \n"
+"	movs r0, 0x1        \n"
+"	add r12, r0         \n"
+"	subs r2, 0x1        \n"
+"	cmp r2, 0           \n"
+"	bne _080A535A       \n"
+"	b _080A538E         \n"
+"_080A5372:             \n"
+"	movs r2, 0          \n"
+"	adds r6, r0, 0x1    \n"
+"	cmp r2, r3          \n"
+"	bgt _080A538E       \n"
+"	adds r2, r3, 0x1    \n"
+"_080A537C:             \n"
+"	ldrb r0, [r4]       \n"
+"	mov r1, r12         \n"
+"	strb r0, [r1]       \n"
+"	adds r4, 0x1        \n"
+"	movs r0, 0x1        \n"
+"	add r12, r0         \n"
+"	subs r2, 0x1        \n"
+"	cmp r2, 0           \n"
+"	bne _080A537C       \n"
+"_080A538E:             \n"
+"	adds r0, r6, r3     \n"
+"	cmp r0, r7          \n"
+"	blt _080A5310       \n"
+"_080A5394:             \n"
+"	add r9, r7          \n"
+"	mov r1, r9          \n"
+"	cmp r1, 0xFF        \n"
+"	bgt _080A53AE       \n"
+"	movs r0, 0xFF       \n"
+"_080A539E:             \n"
+"	mov r2, r12         \n"
+"	strb r0, [r2]       \n"
+"	movs r3, 0x1        \n"
+"	add r12, r3         \n"
+"	add r9, r3          \n"
+"	mov r1, r9          \n"
+"	cmp r1, 0xFF        \n"
+"	ble _080A539E       \n"
+"_080A53AE:             \n"
+"	ldr r1, [sp, 0x14]  \n"
+"	mov r0, r10         \n"
+"	ldr r2, [sp, 0x10]  \n"
+"	cmp r1, r2          \n"
+"	bge _080A53BA       \n"
+"	b _080A526A         \n"
+"_080A53BA:             \n"
+"	ldr r3, [sp, 0x8]   \n"
+"	cmp r0, r3          \n"
+"	bge _080A53E6       \n"
+"	movs r1, 0xFF       \n"
+"_080A53C2:             \n"
+"	adds r0, 0x1        \n"
+"	mov r10, r0         \n"
+"	movs r0, 0xFF       \n"
+"	mov r9, r0          \n"
+"_080A53CA:             \n"
+"	mov r2, r12         \n"
+"	strb r1, [r2]       \n"
+"	movs r3, 0x1        \n"
+"	add r12, r3         \n"
+"	movs r0, 0x1        \n"
+"	negs r0, r0         \n"
+"	add r9, r0          \n"
+"	mov r2, r9          \n"
+"	cmp r2, 0           \n"
+"	bge _080A53CA       \n"
+"	mov r0, r10         \n"
+"	ldr r3, [sp, 0x8]   \n"
+"	cmp r0, r3          \n"
+"	blt _080A53C2       \n"
+"_080A53E6:             \n"
+"	mov r8, r5          \n"
+"	b _080A547E         \n"
+"_080A53EA:             \n"
+"	ldr r1, [sp]        \n"
+"	movs r0, 0          \n"
+"	ldr r2, [sp, 0x4]   \n"
+"	ldrb r2, [r2, 0x1]  \n"
+"	str r2, [sp, 0x10]  \n"
+"	ldr r3, [sp, 0x4]   \n"
+"	ldrh r2, [r3, 0xA]  \n"
+"	mov r3, sp          \n"
+"	strh r2, [r3, 0xC]  \n"
+"	movs r6, 0xFF       \n"
+"_080A53FE:             \n"
+"	adds r5, r0, 0x1    \n"
+"	movs r4, 0xFF       \n"
+"_080A5402:             \n"
+"	strb r6, [r1]       \n"
+"	adds r1, 0x1        \n"
+"	subs r4, 0x1        \n"
+"	cmp r4, 0           \n"
+"	bge _080A5402       \n"
+"	adds r0, r5, 0      \n"
+"	cmp r0, 0x3         \n"
+"	ble _080A53FE       \n"
+"	movs r4, 0          \n"
+"	ldr r3, [sp, 0x10]  \n"
+"	cmp r4, r3          \n"
+"	bge _080A5460       \n"
+"	ldr r2, [sp, 0x4]   \n"
+"	ldrb r7, [r2]       \n"
+"	movs r3, 0xFF       \n"
+"_080A5420:             \n"
+"	adds r5, r0, 0x1    \n"
+"	adds r2, r4, 0x1    \n"
+"	movs r4, 0x4        \n"
+"_080A5426:             \n"
+"	strb r3, [r1]       \n"
+"	adds r1, 0x1        \n"
+"	subs r4, 0x1        \n"
+"	cmp r4, 0           \n"
+"	bge _080A5426       \n"
+"	movs r4, 0x5        \n"
+"	cmp r7, 0           \n"
+"	beq _080A5444       \n"
+"	movs r6, 0          \n"
+"	adds r0, r7, 0      \n"
+"_080A543A:             \n"
+"	strb r6, [r1]       \n"
+"	adds r1, 0x1        \n"
+"	subs r0, 0x1        \n"
+"	cmp r0, 0           \n"
+"	bne _080A543A       \n"
+"_080A5444:             \n"
+"	adds r4, r7         \n"
+"	cmp r4, 0xFF        \n"
+"	bgt _080A5456       \n"
+"	movs r0, 0xFF       \n"
+"_080A544C:             \n"
+"	strb r0, [r1]       \n"
+"	adds r1, 0x1        \n"
+"	adds r4, 0x1        \n"
+"	cmp r4, 0xFF        \n"
+"	ble _080A544C       \n"
+"_080A5456:             \n"
+"	adds r4, r2, 0      \n"
+"	adds r0, r5, 0      \n"
+"	ldr r2, [sp, 0x10]  \n"
+"	cmp r4, r2          \n"
+"	blt _080A5420       \n"
+"_080A5460:             \n"
+"	ldr r3, [sp, 0x8]   \n"
+"	cmp r0, r3          \n"
+"	bge _080A547E       \n"
+"	movs r6, 0xFF       \n"
+"_080A5468:             \n"
+"	adds r5, r0, 0x1    \n"
+"	movs r4, 0xFF       \n"
+"_080A546C:             \n"
+"	strb r6, [r1]       \n"
+"	adds r1, 0x1        \n"
+"	subs r4, 0x1        \n"
+"	cmp r4, 0           \n"
+"	bge _080A546C       \n"
+"	adds r0, r5, 0      \n"
+"	ldr r2, [sp, 0x8]   \n"
+"	cmp r0, r2          \n"
+"	blt _080A5468       \n"
+"_080A547E:             \n"
+"	mov r3, sp          \n"
+"	ldrh r3, [r3, 0xC]  \n"
+"	lsls r0, r3, 16     \n"
+"	cmp r0, 0           \n"
+"	bgt _080A548A       \n"
+"	b _080A5590         \n"
+"_080A548A:             \n"
+"	mov r6, r8          \n"
+"	ldr r0, [sp]        \n"
+"	movs r1, 0x80       \n"
+"	lsls r1, 3          \n"
+"	adds r2, r0, r1     \n"
+"	movs r0, 0          \n"
+"	ldr r3, [sp, 0x10]  \n"
+"	cmp r0, r3          \n"
+"	bge _080A5586       \n"
+"	movs r1, 0xFB       \n"
+"	mov r10, r1         \n"
+"_080A54A0:             \n"
+"	adds r2, 0x5        \n"
+"	movs r4, 0          \n"
+"	cmp r0, 0           \n"
+"	bne _080A54EC       \n"
+"	ldr r3, [sp, 0x4]   \n"
+"	ldrb r7, [r3]       \n"
+"	movs r1, 0x1        \n"
+"	mov r9, r1          \n"
+"	cmp r0, r7          \n"
+"	bge _080A5574       \n"
+"_080A54B4:             \n"
+"	ldrb r1, [r6]       \n"
+"	adds r6, 0x1        \n"
+"	cmp r1, 0x7F        \n"
+"	ble _080A54DE       \n"
+"	subs r4, 0x7F       \n"
+"	cmp r1, 0x7F        \n"
+"	ble _080A54D6       \n"
+"	movs r5, 0x80       \n"
+"	adds r3, r1, 0      \n"
+"	subs r3, 0x7F       \n"
+"_080A54C8:             \n"
+"	ldrb r0, [r2]       \n"
+"	orrs r0, r5         \n"
+"	strb r0, [r2]       \n"
+"	adds r2, 0x1        \n"
+"	subs r3, 0x1        \n"
+"	cmp r3, 0           \n"
+"	bne _080A54C8       \n"
+"_080A54D6:             \n"
+"	adds r4, r1         \n"
+"	ldr r3, [sp, 0x4]   \n"
+"	ldrb r7, [r3]       \n"
+"	b _080A54E6         \n"
+"_080A54DE:             \n"
+"	adds r0, r1, 0x1    \n"
+"	adds r2, r0         \n"
+"	adds r0, r4, 0x1    \n"
+"	adds r4, r0, r1     \n"
+"_080A54E6:             \n"
+"	cmp r4, r7          \n"
+"	blt _080A54B4       \n"
+"	b _080A5574         \n"
+"_080A54EC:             \n"
+"	ldr r1, _080A5538   \n"
+"	adds r1, r2         \n"
+"	mov r12, r1         \n"
+"	ldr r3, [sp, 0x4]   \n"
+"	ldrb r7, [r3]       \n"
+"	adds r0, 0x1        \n"
+"	mov r9, r0          \n"
+"	cmp r4, r7          \n"
+"	bge _080A5574       \n"
+"_080A54FE:             \n"
+"	ldrb r5, [r6]       \n"
+"	adds r6, 0x1        \n"
+"	cmp r5, 0x7F        \n"
+"	ble _080A553C       \n"
+"	subs r4, 0x7F       \n"
+"	cmp r5, 0x7F        \n"
+"	ble _080A556A       \n"
+"	movs r7, 0x80       \n"
+"	movs r0, 0x80       \n"
+"	mov r8, r0          \n"
+"	adds r3, r5, 0      \n"
+"	subs r3, 0x7F       \n"
+"_080A5516:             \n"
+"	mov r0, r12         \n"
+"	ldrb r1, [r0]       \n"
+"	mov r0, r8          \n"
+"	ands r0, r1         \n"
+"	movs r1, 0x1        \n"
+"	add r12, r1         \n"
+"	cmp r0, 0           \n"
+"	bne _080A552C       \n"
+"	ldrb r0, [r2]       \n"
+"	orrs r0, r7         \n"
+"	strb r0, [r2]       \n"
+"_080A552C:             \n"
+"	adds r2, 0x1        \n"
+"	subs r3, 0x1        \n"
+"	cmp r3, 0           \n"
+"	bne _080A5516       \n"
+"	b _080A556A         \n"
+"	.align 2, 0         \n"
+"_080A5538: .4byte 0xffffff00\n"
+"_080A553C:             \n"
+"	movs r3, 0          \n"
+"	adds r4, 0x1        \n"
+"	cmp r3, r5          \n"
+"	bgt _080A556A       \n"
+"	movs r7, 0x80       \n"
+"	movs r3, 0x80       \n"
+"	mov r8, r3          \n"
+"	adds r3, r5, 0x1    \n"
+"_080A554C:             \n"
+"	mov r0, r12         \n"
+"	ldrb r1, [r0]       \n"
+"	mov r0, r8          \n"
+"	ands r0, r1         \n"
+"	movs r1, 0x1        \n"
+"	add r12, r1         \n"
+"	cmp r0, 0           \n"
+"	beq _080A5562       \n"
+"	ldrb r0, [r2]       \n"
+"	orrs r0, r7         \n"
+"	strb r0, [r2]       \n"
+"_080A5562:             \n"
+"	adds r2, 0x1        \n"
+"	subs r3, 0x1        \n"
+"	cmp r3, 0           \n"
+"	bne _080A554C       \n"
+"_080A556A:             \n"
+"	adds r4, r5         \n"
+"	ldr r3, [sp, 0x4]   \n"
+"	ldrb r7, [r3]       \n"
+"	cmp r4, r7          \n"
+"	blt _080A54FE       \n"
+"_080A5574:             \n"
+"	mov r1, r10         \n"
+"	subs r0, r1, r7     \n"
+"	adds r2, r0         \n"
+"	mov r0, r9          \n"
+"	ldr r3, [sp, 0x4]   \n"
+"	ldrb r3, [r3, 0x1]  \n"
+"	str r3, [sp, 0x10]  \n"
+"	cmp r0, r3          \n"
+"	blt _080A54A0       \n"
+"_080A5586:             \n"
+"	mov r8, r6          \n"
+"	ldr r0, [sp, 0x4]   \n"
+"	ldrh r1, [r0, 0xA]  \n"
+"	mov r0, sp          \n"
+"	strh r1, [r0, 0xC]  \n"
+"_080A5590:             \n"
+"	mov r2, sp          \n"
+"	ldrh r2, [r2, 0xC]  \n"
+"	lsls r0, r2, 16     \n"
+"	asrs r0, 16         \n"
+"	cmp r0, 0x1         \n"
+"	ble _080A568C       \n"
+"	mov r6, r8          \n"
+"	ldr r3, [sp]        \n"
+"	movs r0, 0x80       \n"
+"	lsls r0, 3          \n"
+"	adds r2, r3, r0     \n"
+"	movs r0, 0          \n"
+"	b _080A5684         \n"
+"_080A55AA:             \n"
+"	adds r2, 0x5        \n"
+"	movs r4, 0          \n"
+"	cmp r0, 0           \n"
+"	bne _080A55F2       \n"
+"	ldr r3, [sp, 0x4]   \n"
+"	ldrb r7, [r3]       \n"
+"	movs r1, 0x1        \n"
+"	mov r10, r1         \n"
+"	cmp r0, r7          \n"
+"	bge _080A567C       \n"
+"_080A55BE:             \n"
+"	ldrb r1, [r6]       \n"
+"	adds r6, 0x1        \n"
+"	cmp r1, 0x7F        \n"
+"	ble _080A55E4       \n"
+"	subs r4, 0x7F       \n"
+"	cmp r1, 0x7F        \n"
+"	ble _080A55E0       \n"
+"	movs r5, 0x40       \n"
+"	adds r3, r1, 0      \n"
+"	subs r3, 0x7F       \n"
+"_080A55D2:             \n"
+"	ldrb r0, [r2]       \n"
+"	orrs r0, r5         \n"
+"	strb r0, [r2]       \n"
+"	adds r2, 0x1        \n"
+"	subs r3, 0x1        \n"
+"	cmp r3, 0           \n"
+"	bne _080A55D2       \n"
+"_080A55E0:             \n"
+"	adds r4, r1         \n"
+"	b _080A55EC         \n"
+"_080A55E4:             \n"
+"	adds r0, r1, 0x1    \n"
+"	adds r2, r0         \n"
+"	adds r0, r4, 0x1    \n"
+"	adds r4, r0, r1     \n"
+"_080A55EC:             \n"
+"	cmp r4, r7          \n"
+"	blt _080A55BE       \n"
+"	b _080A567C         \n"
+"_080A55F2:             \n"
+"	ldr r3, _080A5640   \n"
+"	adds r3, r2         \n"
+"	mov r12, r3         \n"
+"	ldr r1, [sp, 0x4]   \n"
+"	ldrb r7, [r1]       \n"
+"	adds r0, 0x1        \n"
+"	mov r10, r0         \n"
+"	cmp r4, r7          \n"
+"	bge _080A567C       \n"
+"_080A5604:             \n"
+"	ldrb r5, [r6]       \n"
+"	adds r6, 0x1        \n"
+"	cmp r5, 0x7F        \n"
+"	ble _080A5644       \n"
+"	subs r4, 0x7F       \n"
+"	cmp r5, 0x7F        \n"
+"	ble _080A5676       \n"
+"	movs r3, 0x40       \n"
+"	mov r8, r3          \n"
+"	movs r0, 0x40       \n"
+"	mov r9, r0          \n"
+"	adds r3, r5, 0      \n"
+"	subs r3, 0x7F       \n"
+"_080A561E:             \n"
+"	mov r0, r12         \n"
+"	ldrb r1, [r0]       \n"
+"	mov r0, r9          \n"
+"	ands r0, r1         \n"
+"	movs r1, 0x1        \n"
+"	add r12, r1         \n"
+"	cmp r0, 0           \n"
+"	bne _080A5636       \n"
+"	ldrb r0, [r2]       \n"
+"	mov r1, r8          \n"
+"	orrs r0, r1         \n"
+"	strb r0, [r2]       \n"
+"_080A5636:             \n"
+"	adds r2, 0x1        \n"
+"	subs r3, 0x1        \n"
+"	cmp r3, 0           \n"
+"	bne _080A561E       \n"
+"	b _080A5676         \n"
+"	.align 2, 0         \n"
+"_080A5640: .4byte 0xffffff00\n"
+"_080A5644:             \n"
+"	movs r3, 0          \n"
+"	adds r4, 0x1        \n"
+"	cmp r3, r5          \n"
+"	bgt _080A5676       \n"
+"	movs r3, 0x40       \n"
+"	mov r8, r3          \n"
+"	movs r0, 0x40       \n"
+"	mov r9, r0          \n"
+"	adds r3, r5, 0x1    \n"
+"_080A5656:             \n"
+"	mov r0, r12         \n"
+"	ldrb r1, [r0]       \n"
+"	mov r0, r9          \n"
+"	ands r0, r1         \n"
+"	movs r1, 0x1        \n"
+"	add r12, r1         \n"
+"	cmp r0, 0           \n"
+"	beq _080A566E       \n"
+"	ldrb r0, [r2]       \n"
+"	mov r1, r8          \n"
+"	orrs r0, r1         \n"
+"	strb r0, [r2]       \n"
+"_080A566E:             \n"
+"	adds r2, 0x1        \n"
+"	subs r3, 0x1        \n"
+"	cmp r3, 0           \n"
+"	bne _080A5656       \n"
+"_080A5676:             \n"
+"	adds r4, r5         \n"
+"	cmp r4, r7          \n"
+"	blt _080A5604       \n"
+"_080A567C:             \n"
+"	movs r3, 0xFB       \n"
+"	subs r0, r3, r7     \n"
+"	adds r2, r0         \n"
+"	mov r0, r10         \n"
+"_080A5684:             \n"
+"	ldr r1, [sp, 0x10]  \n"
+"	cmp r0, r1          \n"
+"	blt _080A55AA       \n"
+"	mov r8, r6          \n"
+"_080A568C:             \n"
+"	mov r0, r8          \n"
+"	add sp, 0x18        \n"
+"	pop {r3-r5}         \n"
+"	mov r8, r3          \n"
+"	mov r9, r4          \n"
+"	mov r10, r5         \n"
+"	pop {r4-r7}         \n"
+"	pop {r1}            \n"
+"	bx r1               ");
+}
+
+void sub_80A56A0(u8 param_1, u8 param_2) 
+{
+    sub_80A3B80(gGroundMapDungeon_3001B70, param_1, param_2);
+}
+
+void sub_80A56C0(PixelPos *pos)
+{
+    sub_80A4558(gGroundMapDungeon_3001B70, 0, pos);
+}
+
+void sub_80A56D8(const PixelPos *pos)
+{
+    sub_80A456C(gGroundMapDungeon_3001B70, 0, pos);
+}
+
+void sub_80A56F0(PixelPos *pos)
+{
+    gGroundMapAction->unkE8 = *pos;
+}
+
+void sub_80A5704(PixelPos *pos)
+{
+    gGroundMapAction->unkF8 = *pos;
+    gGroundMapAction->unkF0 = 0;
+    gGroundMapAction->unkF4 = 0;
+}
+
+s16 GetGroundMapID(void)
+{
+    return gGroundMapAction->groundMapId;
+}
+
+UNUSED static const GroundConversionStruct *GetGroundConversionStruct(void)
+{
+    return &gGroundMapConversionTable[gGroundMapAction->groundMapId];
+}
+
+UNUSED static bool8 sub_80A5758(PixelPos *pos)
+{
+    if(gGroundMapDungeon_3001B70 != NULL)
+    {
+        sub_80A4608(gGroundMapDungeon_3001B70, pos);
+        return TRUE;
+
+    }
+    else {
+        return FALSE;
+    }
+}
+
+bool8 GetCurrentDungeonBounds(PixelPos *pos1, PixelPos *pos2)
+{
+    if(gGroundMapDungeon_3001B70 != NULL)
+    {
+        GetDungeonBounds(gGroundMapDungeon_3001B70, pos1, pos2);
+        return TRUE;
+
+    }
+    else {
+        return FALSE;
+    }
+}
+
+bool8 sub_80A579C(PixelPos *pos1, PixelPos *pos2)
+{
+    const GroundConversionStruct *convTable;
+
+    if(gGroundMapDungeon_3001B70 != NULL)
+    {
+        if(gGroundMapAction->groundMapId != -1)
+        {
+            convTable = &gGroundMapConversionTable[gGroundMapAction->groundMapId];
+            GetDungeonBounds(gGroundMapDungeon_3001B70, pos1, pos2);   
+
+            pos1->x += 0x7800;
+            pos1->y += 0x5000;
+            pos2->x -= 0x7800;
+            pos2->y -= 0x5000;
+
+            if(convTable->unk0 == 0xA)
+            {
+                pos1->x += 0x1800;
+                pos1->y += 0x1800;
+                pos2->x -= 0x1800;
+                pos2->y -= 0x1800;
+            }
+
+            if (pos1->x > pos2->x) {
+                pos2->x = pos1->x;
+            }
+            if (pos1->y > pos2->y) {
+                pos2->y = pos1->y;
+            }
+            return TRUE;
+        }
+    }
+    return FALSE;
+}
+
+bool8 CheckMapCollision_80A585C(PixelPos *pixPos1,PixelPos *boundary)
+{
+    u8 *currPtr;
+    int i, j;
+    u8 *ptr;
+
+    ptr = (void *)gGroundMapDungeon_3001B70->unk544 + ((pixPos1->y * 256) + pixPos1->x + 0x405);
+
+    i = boundary->y;
+
+    if (gGroundMapDungeon_3001B70->unk544 == NULL) {
+        return TRUE;
+    }
+
+    for (i = boundary->y; i > 0; i--) {
+        for (j = boundary->x, currPtr = ptr; j > 0; j--) {
+            if ((*(currPtr++) & 0x80) != 0) 
+                return TRUE;
+        }
+        ptr += 256;
+    }
+    return FALSE;
+}
+
+bool8 sub_80A58C8(PixelPos *pixPos1,PixelPos *boundary)
+{
+    u8 *currPtr;
+    int i, j;
+    u8 *ptr;
+
+    ptr = (void *)gGroundMapDungeon_3001B70->unk544 + ((pixPos1->y * 256) + pixPos1->x + 0x405);
+
+    i = boundary->y;
+
+    if (gGroundMapDungeon_3001B70->unk544 == NULL) {
+        return TRUE;
+    }
+
+    for (i = boundary->y; i > 0; i--) {
+        for (j = boundary->x, currPtr = ptr; j > 0; j--) {
+            if ((*(currPtr++) & 0x40) != 0) 
+                return TRUE;
+        }
+        ptr += 256;
+    }
+    return FALSE;
+}
+
+u8 sub_80A5934(s32 param_1, s32 param_2, s32 param_3)
+{
+    u32 param_1_u32 = (u8)param_1;
+    return sub_80A4660(gGroundMapDungeon_3001B70, param_1_u32, param_2, param_3);
+}
+
+u8 sub_80A595C(s32 param_1, s32 param_2, s32 param_3)
+{
+    u32 param_1_u32 = (u8)param_1;
+    return sub_80A46C0(gGroundMapDungeon_3001B70, param_1_u32, param_2, param_3);
+}
+
+u16 sub_80A5984(s32 param_1, PixelPos *param_2)
+{
+    return sub_80A4720(gGroundMapDungeon_3001B70, param_1, param_2);
+}
+
+void sub_80A59A0(s32 param_1, PixelPos *param_2, u32 param_3)
+{
+    u32 param_3_u32 = (u16)param_3;
+    sub_80A4740(gGroundMapDungeon_3001B70, param_1, param_2, param_3_u32);
+}
+
+void GroundMap_Action(void)
+{
+    nullsub_123();
+    HandleAction((Action *)gGroundMapAction, &gUnknown_8117770);
+}
+
+void sub_80A59DC(void)
+{
+    if (gGroundMapDungeon_3001B70 != NULL) {
+        PixelPos pixPos;
+
+        if (sub_809D248(&pixPos) == 0) {
+            pixPos.x = 0;
+            pixPos.y = 0;
+        }
+
+        switch (gGroundMapAction->groundMapId) {
+            case 0xA2:
+            case 0xA3:
+            case 0xDF: {
+                PixelPos pixPos2;
+
+                gGroundMapAction->unkF4 += 2;
+                gGroundMapAction->unkF8.y += gGroundMapAction->unkF4 / 4;
+                gGroundMapAction->unkF4 &= 3;
+                sub_80A4580(gGroundMapDungeon_3001B70, 0, &gGroundMapAction->unkF8);
+                pixPos2 = (PixelPos) { pixPos.x, pixPos.y + gGroundMapAction->unkF8.y };
+                sub_80A4580(gGroundMapDungeon_3001B70, 0, &pixPos2);
+                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos2);
+                pixPos2.x = pixPos.x;
+                pixPos2.y = pixPos.y - gGroundMapAction->unkF8.y;
+                sub_80A4580(gGroundMapDungeon_3001B70, 1, &pixPos2);
+                sub_80A456C(gGroundMapDungeon_3001B70, 1, &pixPos2);
+                break;
+            }
+            case 0xA8:
+            case 0xAA: {
+                PixelPos pixPos2;
+
+                gGroundMapAction->unkF0 += gGroundMapAction->unkE8.x;
+                gGroundMapAction->unkF8.x += gGroundMapAction->unkF0 / 8;
+                gGroundMapAction->unkF0 %= 8;
+                sub_80A4580(gGroundMapDungeon_3001B70, 0, &gGroundMapAction->unkF8);
+                pixPos2 = (PixelPos) { pixPos.x + gGroundMapAction->unkF8.x, pixPos.y };
+                sub_80A4580(gGroundMapDungeon_3001B70, 0, &pixPos2);
+                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos2);
+                break;
+            }
+            case 0xAE: {
+                PixelPos pixPos2;
+
+                gGroundMapAction->unkF0 += gGroundMapAction->unkE8.x;
+                gGroundMapAction->unkF8.x += gGroundMapAction->unkF0 / 8;
+                gGroundMapAction->unkF0 %= 8;
+                sub_80A4580(gGroundMapDungeon_3001B70, 0, &gGroundMapAction->unkF8);
+                pixPos2 = (PixelPos) { pixPos.x + gGroundMapAction->unkF8.x, pixPos.y };
+                sub_80A4580(gGroundMapDungeon_3001B70, 0, &pixPos2);
+                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos2);
+                sub_80A456C(gGroundMapDungeon_3001B70, 1, &pixPos2);
+                break;
+            }
+            case 0xAB: {
+                PixelPos pixPos2 = pixPos;
+
+                sub_80A4580(gGroundMapDungeon_3001B70, 0, &pixPos2);
+                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos2);
+                break;
+            }
+            case 0xAF: {
+                PixelPos pixPos2;
+
+                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos);
+                gGroundMapAction->unkF0 += gGroundMapAction->unkE8.x;
+                gGroundMapAction->unkF4 += gGroundMapAction->unkE8.y;
+                gGroundMapAction->unkF8.x += gGroundMapAction->unkF0 / 8;
+                gGroundMapAction->unkF8.y += gGroundMapAction->unkF4 / 8;
+                gGroundMapAction->unkF0 %= 8;
+                gGroundMapAction->unkF4 %= 8;
+                sub_80A4580(gGroundMapDungeon_3001B70, 0, &gGroundMapAction->unkF8);
+                pixPos2 = (PixelPos) { pixPos.x + gGroundMapAction->unkF8.x, pixPos.y + gGroundMapAction->unkF8.y};
+                sub_80A4580(gGroundMapDungeon_3001B70, 1, &pixPos2);
+                sub_80A456C(gGroundMapDungeon_3001B70, 1, &pixPos2);
+                break;
+            }
+            case 0xB0: {
+                PixelPos pixPos2;
+
+                gGroundMapAction->unkF0 += gGroundMapAction->unkE8.x;
+                gGroundMapAction->unkF4 += gGroundMapAction->unkE8.y;
+                gGroundMapAction->unkF8.x += gGroundMapAction->unkF0 / 8;
+                gGroundMapAction->unkF8.y += gGroundMapAction->unkF4 / 8;
+                gGroundMapAction->unkF0 %= 8;
+                gGroundMapAction->unkF4 %= 8;
+                sub_80A4580(gGroundMapDungeon_3001B70, 0, &gGroundMapAction->unkF8);
+                pixPos2 = (PixelPos) { pixPos.x + gGroundMapAction->unkF8.x, pixPos.y + gGroundMapAction->unkF8.y};
+                sub_80A4580(gGroundMapDungeon_3001B70, 0, &pixPos2);
+                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos2);
+                break;
+            }
+            case 0xBA: {
+                PixelPos pixPos2;
+
+                sub_80A456C(gGroundMapDungeon_3001B70, 1, &pixPos);
+                gGroundMapAction->unkF0++;
+                gGroundMapAction->unkF8.x += gGroundMapAction->unkF0 / 4;
+                gGroundMapAction->unkF0 &= 3;
+                sub_80A4580(gGroundMapDungeon_3001B70, 1, &gGroundMapAction->unkF8);
+                pixPos2 = (PixelPos) { pixPos.x + gGroundMapAction->unkF8.x, pixPos.y};
+                sub_80A4580(gGroundMapDungeon_3001B70, 0, &pixPos2);
+                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos2);
+                break;
+            }
+            case 4: {
+                PixelPos pixPos2;
+
+                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos);
+                gGroundMapAction->unkF0++;
+                gGroundMapAction->unkF8.x += gGroundMapAction->unkF0 / 8;
+                gGroundMapAction->unkF0 &= 7;
+                sub_80A4580(gGroundMapDungeon_3001B70, 1, &gGroundMapAction->unkF8);
+                pixPos2 = (PixelPos) { pixPos.x + gGroundMapAction->unkF8.x, pixPos.y};
+                sub_80A4580(gGroundMapDungeon_3001B70, 1, &pixPos2);
+                sub_80A456C(gGroundMapDungeon_3001B70, 1, &pixPos2);
+                break;
+            }
+            case 0xE0: {
+                PixelPos pixPos2;
+
+                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos);
+                gGroundMapAction->unkF0++;
+                gGroundMapAction->unkF8.x += gGroundMapAction->unkF0 / 8;
+                gGroundMapAction->unkF0 &= 7;
+                sub_80A4580(gGroundMapDungeon_3001B70, 1, &gGroundMapAction->unkF8);
+                pixPos2 = (PixelPos) { gGroundMapAction->unkF8.x, pixPos.y};
+                sub_80A456C(gGroundMapDungeon_3001B70, 1, &pixPos2);
+                break;
+            }
+            case 0xA1: {
+                PixelPos pixPos2;
+
+                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos);
+                pixPos2 = (PixelPos) {0, 0};
+                sub_80A456C(gGroundMapDungeon_3001B70, 1, &pixPos2);
+                break;
+            }
+            default:
+                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos);
+                break;
+        }
+
+        sub_80A4764(gGroundMapDungeon_3001B70);
+    }
+
+    sub_80A60D8();
+}
+
diff --git a/src/ground_map_1.c b/src/ground_map_1.c
index f03947cbe..f8e0747f6 100644
--- a/src/ground_map_1.c
+++ b/src/ground_map_1.c
@@ -1,200 +1,223 @@
 #include "global.h"
+#include "code_800558C.h"
+#include "debug.h"
+#include "event_flag.h"
 #include "ground_bg.h"
 #include "ground_map.h"
-#include "ground_map_2.h"
-#include "ground_script.h"
+#include "ground_map_1.h"
+#include "memory.h"
 
-extern GroundMapAction *gGroundMapAction;
-extern DebugLocation gUnknown_8117770;
+IWRAM_INIT unkStruct_3001B74 *gUnknown_3001B74 = {NULL};
+IWRAM_INIT GroundBg *gUnknown_3001B78 = {NULL};
 
-extern s16 HandleAction(Action *action, DebugLocation *debug);
-extern void sub_80A4740(void *, s32, s32 *, u32);
-extern u32 sub_80A4720(void *, s32, s32 *);
-extern u8 sub_80A46C0(GroundBg *, u32, s32, s32);
-extern u8 sub_80A4660(GroundBg *, u32, s32, s32);
+extern const SubStruct_52C gUnknown_8117784;
+extern const s16 gUnknown_811E5F4[][2];
+extern const u8 gGroundWeatherSelect[];
+extern const PixelPos gUnknown_81177BC;
 
-u8 sub_80A5934(s32 param_1, s32 param_2, s32 param_3)
+static void sub_80A62D0(void);
+
+void sub_80A5E70(void)
 {
-    u32 param_1_u32 = (u8)param_1;
-    return sub_80A4660(gGroundMapDungeon_3001B70, param_1_u32, param_2, param_3);
+    if (gGroundMapDungeon_3001B70 != NULL)
+        sub_80A49E8(gGroundMapDungeon_3001B70);
+
+    sub_80A62D0();
 }
 
-u8 sub_80A595C(s32 param_1, s32 param_2, s32 param_3)
+void sub_80A5E8C(u8 param_1)
 {
-    u32 param_1_u32 = (u8)param_1;
-    return sub_80A46C0(gGroundMapDungeon_3001B70, param_1_u32, param_2, param_3);
+    gUnknown_3001B74 = MemoryAlloc(sizeof(unkStruct_3001B74), 6);
+    gUnknown_3001B74->unk0 = -1;
+    gUnknown_3001B74->unk2 = 0;
+    sub_80A5EDC(param_1);
 }
 
-u16 sub_80A5984(s32 param_1, s32 *param_2)
+void sub_80A5EBC(void)
 {
-    return sub_80A4720(gGroundMapDungeon_3001B70, param_1, param_2);
+    sub_80A5EDC(0);
+    MemoryFree(gUnknown_3001B74);
+    gUnknown_3001B74 = NULL;
 }
 
-void sub_80A59A0(s32 param_1, s32 *param_2, u32 param_3)
+void sub_80A5EDC(u8 param_1)
 {
-    u32 param_3_u32 = (u16)param_3;
-    sub_80A4740(gGroundMapDungeon_3001B70, param_1, param_2, param_3_u32);
-}
+    SetScriptVarValue(NULL, WEATHER_KIND, -1);
+    gUnknown_3001B74->unk0  = -1;
+    gUnknown_3001B74->unk2 = param_1;
 
-void GroundMap_Action(void)
-{
-    nullsub_123();
-    HandleAction((Action *)gGroundMapAction, &gUnknown_8117770);
-}
-
-extern u8 sub_809D248(PixelPos *r0);
-extern void sub_80A4580(GroundBg *, u32, PixelPos *);
-extern void sub_80A456C(GroundBg *, u32, const PixelPos *);
-extern void sub_80A4764(GroundBg *);
-
-extern GroundMapAction *gGroundMapAction;
-
-void sub_80A59DC(void)
-{
-    if (gGroundMapDungeon_3001B70 != NULL) {
-        PixelPos pixPos;
-
-        if (sub_809D248(&pixPos) == 0) {
-            pixPos.x = 0;
-            pixPos.y = 0;
-        }
-
-        switch (gGroundMapAction->groundMapId) {
-            case 0xA2:
-            case 0xA3:
-            case 0xDF: {
-                PixelPos pixPos2;
-
-                gGroundMapAction->unkF4 += 2;
-                gGroundMapAction->unkF8.y += gGroundMapAction->unkF4 / 4;
-                gGroundMapAction->unkF4 &= 3;
-                sub_80A4580(gGroundMapDungeon_3001B70, 0, &gGroundMapAction->unkF8);
-                pixPos2 = (PixelPos) { pixPos.x, pixPos.y + gGroundMapAction->unkF8.y };
-                sub_80A4580(gGroundMapDungeon_3001B70, 0, &pixPos2);
-                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos2);
-                pixPos2.x = pixPos.x;
-                pixPos2.y = pixPos.y - gGroundMapAction->unkF8.y;
-                sub_80A4580(gGroundMapDungeon_3001B70, 1, &pixPos2);
-                sub_80A456C(gGroundMapDungeon_3001B70, 1, &pixPos2);
-                break;
-            }
-            case 0xA8:
-            case 0xAA: {
-                PixelPos pixPos2;
-
-                gGroundMapAction->unkF0 += gGroundMapAction->unkE8;
-                gGroundMapAction->unkF8.x += gGroundMapAction->unkF0 / 8;
-                gGroundMapAction->unkF0 %= 8;
-                sub_80A4580(gGroundMapDungeon_3001B70, 0, &gGroundMapAction->unkF8);
-                pixPos2 = (PixelPos) { pixPos.x + gGroundMapAction->unkF8.x, pixPos.y };
-                sub_80A4580(gGroundMapDungeon_3001B70, 0, &pixPos2);
-                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos2);
-                break;
-            }
-            case 0xAE: {
-                PixelPos pixPos2;
-
-                gGroundMapAction->unkF0 += gGroundMapAction->unkE8;
-                gGroundMapAction->unkF8.x += gGroundMapAction->unkF0 / 8;
-                gGroundMapAction->unkF0 %= 8;
-                sub_80A4580(gGroundMapDungeon_3001B70, 0, &gGroundMapAction->unkF8);
-                pixPos2 = (PixelPos) { pixPos.x + gGroundMapAction->unkF8.x, pixPos.y };
-                sub_80A4580(gGroundMapDungeon_3001B70, 0, &pixPos2);
-                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos2);
-                sub_80A456C(gGroundMapDungeon_3001B70, 1, &pixPos2);
-                break;
-            }
-            case 0xAB: {
-                PixelPos pixPos2 = pixPos;
-
-                sub_80A4580(gGroundMapDungeon_3001B70, 0, &pixPos2);
-                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos2);
-                break;
-            }
-            case 0xAF: {
-                PixelPos pixPos2;
-
-                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos);
-                gGroundMapAction->unkF0 += gGroundMapAction->unkE8;
-                gGroundMapAction->unkF4 += gGroundMapAction->unkEC;
-                gGroundMapAction->unkF8.x += gGroundMapAction->unkF0 / 8;
-                gGroundMapAction->unkF8.y += gGroundMapAction->unkF4 / 8;
-                gGroundMapAction->unkF0 %= 8;
-                gGroundMapAction->unkF4 %= 8;
-                sub_80A4580(gGroundMapDungeon_3001B70, 0, &gGroundMapAction->unkF8);
-                pixPos2 = (PixelPos) { pixPos.x + gGroundMapAction->unkF8.x, pixPos.y + gGroundMapAction->unkF8.y};
-                sub_80A4580(gGroundMapDungeon_3001B70, 1, &pixPos2);
-                sub_80A456C(gGroundMapDungeon_3001B70, 1, &pixPos2);
-                break;
-            }
-            case 0xB0: {
-                PixelPos pixPos2;
-
-                gGroundMapAction->unkF0 += gGroundMapAction->unkE8;
-                gGroundMapAction->unkF4 += gGroundMapAction->unkEC;
-                gGroundMapAction->unkF8.x += gGroundMapAction->unkF0 / 8;
-                gGroundMapAction->unkF8.y += gGroundMapAction->unkF4 / 8;
-                gGroundMapAction->unkF0 %= 8;
-                gGroundMapAction->unkF4 %= 8;
-                sub_80A4580(gGroundMapDungeon_3001B70, 0, &gGroundMapAction->unkF8);
-                pixPos2 = (PixelPos) { pixPos.x + gGroundMapAction->unkF8.x, pixPos.y + gGroundMapAction->unkF8.y};
-                sub_80A4580(gGroundMapDungeon_3001B70, 0, &pixPos2);
-                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos2);
-                break;
-            }
-            case 0xBA: {
-                PixelPos pixPos2;
-
-                sub_80A456C(gGroundMapDungeon_3001B70, 1, &pixPos);
-                gGroundMapAction->unkF0++;
-                gGroundMapAction->unkF8.x += gGroundMapAction->unkF0 / 4;
-                gGroundMapAction->unkF0 &= 3;
-                sub_80A4580(gGroundMapDungeon_3001B70, 1, &gGroundMapAction->unkF8);
-                pixPos2 = (PixelPos) { pixPos.x + gGroundMapAction->unkF8.x, pixPos.y};
-                sub_80A4580(gGroundMapDungeon_3001B70, 0, &pixPos2);
-                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos2);
-                break;
-            }
-            case 4: {
-                PixelPos pixPos2;
-
-                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos);
-                gGroundMapAction->unkF0++;
-                gGroundMapAction->unkF8.x += gGroundMapAction->unkF0 / 8;
-                gGroundMapAction->unkF0 &= 7;
-                sub_80A4580(gGroundMapDungeon_3001B70, 1, &gGroundMapAction->unkF8);
-                pixPos2 = (PixelPos) { pixPos.x + gGroundMapAction->unkF8.x, pixPos.y};
-                sub_80A4580(gGroundMapDungeon_3001B70, 1, &pixPos2);
-                sub_80A456C(gGroundMapDungeon_3001B70, 1, &pixPos2);
-                break;
-            }
-            case 0xE0: {
-                PixelPos pixPos2;
-
-                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos);
-                gGroundMapAction->unkF0++;
-                gGroundMapAction->unkF8.x += gGroundMapAction->unkF0 / 8;
-                gGroundMapAction->unkF0 &= 7;
-                sub_80A4580(gGroundMapDungeon_3001B70, 1, &gGroundMapAction->unkF8);
-                pixPos2 = (PixelPos) { gGroundMapAction->unkF8.x, pixPos.y};
-                sub_80A456C(gGroundMapDungeon_3001B70, 1, &pixPos2);
-                break;
-            }
-            case 0xA1: {
-                PixelPos pixPos2;
-
-                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos);
-                pixPos2 = (PixelPos) {0, 0};
-                sub_80A456C(gGroundMapDungeon_3001B70, 1, &pixPos2);
-                break;
-            }
-            default:
-                sub_80A456C(gGroundMapDungeon_3001B70, 0, &pixPos);
-                break;
-        }
-
-        sub_80A4764(gGroundMapDungeon_3001B70);
+    if (gUnknown_3001B78 != NULL) {
+        GroundBg_FreeAll(gUnknown_3001B78);
+        MemoryFree(gUnknown_3001B78);
+        gUnknown_3001B78 = NULL;
     }
 
-    sub_80A60D8();
+    if (param_1) {
+        gUnknown_3001B78 = MemoryAlloc(sizeof(GroundBg), 6);
+        GroundBg_Init(gUnknown_3001B78, &gUnknown_8117784);
+        sub_80A2FBC(gUnknown_3001B78, -1);
+    }
+}
+
+void nullsub_121(void)
+{}
+
+void nullsub_122(void)
+{}
+
+void GroundWeather_Select(s16 param_1)
+{
+    s32 iVar2;
+    s32 iVar3;
+    const s16 *pVar1;
+
+    iVar2 = param_1;
+    iVar3 = iVar2;
+    Log(0, gGroundWeatherSelect, iVar2, gUnknown_3001B74->unk2);
+    SetScriptVarValue(NULL, WEATHER_KIND, iVar2);
+    gUnknown_3001B74->unk0 = iVar2;
+
+    if (gUnknown_3001B74->unk2 == 0)
+        return;
+
+    if (iVar2 == -1) {
+        sub_80A2FBC(gUnknown_3001B78, -1);
+        return;
+    }
+
+    pVar1 = gUnknown_811E5F4[iVar3];
+    sub_80A2FBC(gUnknown_3001B78, pVar1[1]);
+
+    gUnknown_3001B74->unk4 = 0;
+    gUnknown_3001B74->unk8 = 0;
+    gUnknown_3001B74->unkC.x = 0;
+    gUnknown_3001B74->unkC.y = 0;
+    gUnknown_3001B74->unk20 = 0;
+    gUnknown_3001B74->unk1C = 0;
+    gUnknown_3001B74->unk18 = 0;
+    gUnknown_3001B74->unk14 = 0;
+
+    switch (gUnknown_3001B74->unk0) {
+        case 9:
+            sub_80A3BB0(gUnknown_3001B78, 1);
+            gUnknown_2026E4E = 0x40c;
+            break;
+        case 7:
+            gUnknown_2026E4E = 0x808;
+            break;
+        case 14:
+            sub_80A3BB0(gUnknown_3001B78, 1);
+            gUnknown_2026E4E = 0x1010;
+            break;
+        case 15:
+            sub_80A3BB0(gUnknown_3001B78, 1);
+            gUnknown_2026E4E = 0x40c;
+            break;
+        case 0:
+        case 3:
+        case 4:
+        case 5:
+        case 8:
+            gUnknown_2026E4E = 0x1010;
+            break;
+        default:
+            if (pVar1[0] == 1)
+                sub_80A3BB0(gUnknown_3001B78, 1);
+
+            gUnknown_2026E4E = 0x1000;
+            break;
+    }
+}
+
+UNUSED static s16 sub_80A60C4(void)
+{
+    return gUnknown_3001B74->unk0;
+}
+
+void nullsub_123(void)
+{}
+
+void sub_80A60D8(void)
+{
+    if (gUnknown_3001B74->unk2 == 0)
+        return;
+
+    switch ((s16)(gUnknown_3001B74->unk0 + 1)) {
+        case 10: {
+            PixelPos localArray;
+
+            gUnknown_3001B74->unk4 += 2;
+            gUnknown_3001B74->unk8 += 1;
+            gUnknown_3001B74->unkC.x += gUnknown_3001B74->unk4 / 4;
+            gUnknown_3001B74->unkC.y += gUnknown_3001B74->unk8 / 4;
+            sub_80A4580(gUnknown_3001B78, 0, &gUnknown_3001B74->unkC);
+            gUnknown_3001B74->unk4 &= 3;
+            gUnknown_3001B74->unk8 &= 3;
+            sub_80A56C0(&localArray);
+            localArray.x -= gUnknown_3001B74->unkC.x;
+            localArray.y += gUnknown_3001B74->unkC.y;
+            sub_80A4580(gUnknown_3001B78, 0, &localArray);
+            sub_80A456C(gUnknown_3001B78, 0, &localArray);
+            break;
+        }
+        case 11:
+        case 12:
+        case 13:
+        case 14: {
+            PixelPos localArray;
+
+            sub_80A56C0(&localArray);
+            sub_80A456C(gUnknown_3001B78,0,&localArray);
+            break;
+        }
+        case 15: {
+            PixelPos localArray;
+
+            gUnknown_3001B74->unk4++;
+            gUnknown_3001B74->unkC.x += gUnknown_3001B74->unk4 / 4;
+            sub_80A4580(gUnknown_3001B78, 0, &gUnknown_3001B74->unkC);
+            gUnknown_3001B74->unk4 &= 3;
+            sub_80A56C0(&localArray);
+            localArray.x -= gUnknown_3001B74->unkC.x;
+            localArray.y = 0;
+            sub_80A4580(gUnknown_3001B78, 0, &localArray);
+            sub_80A456C(gUnknown_3001B78, 0, &localArray);
+            break;
+        }
+        case 16: {
+            PixelPos localArray;
+
+            gUnknown_3001B74->unk4 += 2;
+            gUnknown_3001B74->unkC.x += gUnknown_3001B74->unk4 / 4;
+            sub_80A4580(gUnknown_3001B78, 0, &gUnknown_3001B74->unkC);
+            gUnknown_3001B74->unk4 &= 3;
+            sub_80A56C0(&localArray);
+            localArray.x -= gUnknown_3001B74->unkC.x;
+            localArray.y = 0;
+            sub_80A4580(gUnknown_3001B78, 0, &localArray);
+            sub_80A456C(gUnknown_3001B78, 0, &localArray);
+            break;
+        }
+        default: {
+            PixelPos localArray;
+            const s16 *puVar1 = gUnknown_811E5F4[gUnknown_3001B74->unk0];
+            if (puVar1[0] == 0) {
+                sub_80A56C0(&localArray);
+                sub_80A456C(gUnknown_3001B78,0,&localArray);
+                break;
+            }
+        }
+        // NOTE: Fallthrough needed here.
+        case 0:
+            sub_80A456C(gUnknown_3001B78, 0, &gUnknown_81177BC);
+            break;
+    }
+
+    sub_80A4764(gUnknown_3001B78);
+}
+
+static void sub_80A62D0(void)
+{
+    if (gUnknown_3001B74->unk2 != 0)
+        sub_80A49E8(gUnknown_3001B78);
 }
diff --git a/src/ground_map_2.c b/src/ground_map_2.c
deleted file mode 100644
index 049ae0016..000000000
--- a/src/ground_map_2.c
+++ /dev/null
@@ -1,229 +0,0 @@
-#include "global.h"
-#include "code_800558C.h"
-#include "debug.h"
-#include "event_flag.h"
-#include "ground_bg.h"
-#include "ground_map.h"
-#include "ground_map_2.h"
-#include "memory.h"
-
-IWRAM_INIT unkStruct_3001B74 *gUnknown_3001B74 = {NULL};
-IWRAM_INIT GroundBg *gUnknown_3001B78 = {NULL};
-
-extern const SubStruct_52C gUnknown_8117784;
-extern const s16 gUnknown_811E5F4[][2];
-extern const u8 gGroundWeatherSelect[];
-extern const s32 gUnknown_81177BC[];
-
-extern void sub_80A49E8(GroundBg *);
-extern void sub_80A456C(GroundBg *, u32, const s32 *);
-extern void sub_80A4580(GroundBg *, u32, s32 *);
-extern void sub_80A56C0(s32 *);
-extern void sub_80A4764(GroundBg *);
-
-static void sub_80A62D0(void);
-
-void sub_80A5E70(void)
-{
-    if (gGroundMapDungeon_3001B70 != NULL)
-        sub_80A49E8(gGroundMapDungeon_3001B70);
-
-    sub_80A62D0();
-}
-
-void sub_80A5E8C(u8 param_1)
-{
-    gUnknown_3001B74 = MemoryAlloc(sizeof(unkStruct_3001B74), 6);
-    gUnknown_3001B74->unk0 = -1;
-    gUnknown_3001B74->unk2 = 0;
-    sub_80A5EDC(param_1);
-}
-
-void sub_80A5EBC(void)
-{
-    sub_80A5EDC(0);
-    MemoryFree(gUnknown_3001B74);
-    gUnknown_3001B74 = NULL;
-}
-
-void sub_80A5EDC(u8 param_1)
-{
-    SetScriptVarValue(NULL, WEATHER_KIND, -1);
-    gUnknown_3001B74->unk0  = -1;
-    gUnknown_3001B74->unk2 = param_1;
-
-    if (gUnknown_3001B78 != NULL) {
-        GroundBg_FreeAll(gUnknown_3001B78);
-        MemoryFree(gUnknown_3001B78);
-        gUnknown_3001B78 = NULL;
-    }
-
-    if (param_1) {
-        gUnknown_3001B78 = MemoryAlloc(sizeof(GroundBg), 6);
-        GroundBg_Init(gUnknown_3001B78, &gUnknown_8117784);
-        sub_80A2FBC(gUnknown_3001B78, -1);
-    }
-}
-
-void nullsub_121(void)
-{}
-
-void nullsub_122(void)
-{}
-
-void GroundWeather_Select(s16 param_1)
-{
-    s32 iVar2;
-    s32 iVar3;
-    const s16 *pVar1;
-
-    iVar2 = param_1;
-    iVar3 = iVar2;
-    Log(0, gGroundWeatherSelect, iVar2, gUnknown_3001B74->unk2);
-    SetScriptVarValue(NULL, WEATHER_KIND, iVar2);
-    gUnknown_3001B74->unk0 = iVar2;
-
-    if (gUnknown_3001B74->unk2 == 0)
-        return;
-
-    if (iVar2 == -1) {
-        sub_80A2FBC(gUnknown_3001B78, -1);
-        return;
-    }
-
-    pVar1 = gUnknown_811E5F4[iVar3];
-    sub_80A2FBC(gUnknown_3001B78, pVar1[1]);
-
-    gUnknown_3001B74->unk4 = 0;
-    gUnknown_3001B74->unk8 = 0;
-    gUnknown_3001B74->unkC = 0;
-    gUnknown_3001B74->unk10 = 0;
-    gUnknown_3001B74->unk20 = 0;
-    gUnknown_3001B74->unk1C = 0;
-    gUnknown_3001B74->unk18 = 0;
-    gUnknown_3001B74->unk14 = 0;
-
-    switch (gUnknown_3001B74->unk0) {
-        case 9:
-            sub_80A3BB0(gUnknown_3001B78, 1);
-            gUnknown_2026E4E = 0x40c;
-            break;
-        case 7:
-            gUnknown_2026E4E = 0x808;
-            break;
-        case 14:
-            sub_80A3BB0(gUnknown_3001B78, 1);
-            gUnknown_2026E4E = 0x1010;
-            break;
-        case 15:
-            sub_80A3BB0(gUnknown_3001B78, 1);
-            gUnknown_2026E4E = 0x40c;
-            break;
-        case 0:
-        case 3:
-        case 4:
-        case 5:
-        case 8:
-            gUnknown_2026E4E = 0x1010;
-            break;
-        default:
-            if (pVar1[0] == 1)
-                sub_80A3BB0(gUnknown_3001B78, 1);
-
-            gUnknown_2026E4E = 0x1000;
-            break;
-    }
-}
-
-UNUSED static s16 sub_80A60C4(void)
-{
-    return gUnknown_3001B74->unk0;
-}
-
-void nullsub_123(void)
-{}
-
-void sub_80A60D8(void)
-{
-    if (gUnknown_3001B74->unk2 == 0)
-        return;
-
-    switch ((s16)(gUnknown_3001B74->unk0 + 1)) {
-        case 10: {
-            s32 localArray[2];
-
-            gUnknown_3001B74->unk4 += 2;
-            gUnknown_3001B74->unk8 += 1;
-            gUnknown_3001B74->unkC += gUnknown_3001B74->unk4 / 4;
-            gUnknown_3001B74->unk10 += gUnknown_3001B74->unk8 / 4;
-            sub_80A4580(gUnknown_3001B78, 0, &gUnknown_3001B74->unkC);
-            gUnknown_3001B74->unk4 &= 3;
-            gUnknown_3001B74->unk8 &= 3;
-            sub_80A56C0(localArray);
-            localArray[0] -= gUnknown_3001B74->unkC;
-            localArray[1] += gUnknown_3001B74->unk10;
-            sub_80A4580(gUnknown_3001B78, 0, localArray);
-            sub_80A456C(gUnknown_3001B78, 0, localArray);
-            break;
-        }
-        case 11:
-        case 12:
-        case 13:
-        case 14: {
-            s32 localArray[2];
-
-            sub_80A56C0(localArray);
-            sub_80A456C(gUnknown_3001B78,0,localArray);
-            break;
-        }
-        case 15: {
-            s32 localArray[2];
-
-            gUnknown_3001B74->unk4++;
-            gUnknown_3001B74->unkC += gUnknown_3001B74->unk4 / 4;
-            sub_80A4580(gUnknown_3001B78, 0, &gUnknown_3001B74->unkC);
-            gUnknown_3001B74->unk4 &= 3;
-            sub_80A56C0(localArray);
-            localArray[0] -= gUnknown_3001B74->unkC;
-            localArray[1] = 0;
-            sub_80A4580(gUnknown_3001B78, 0, localArray);
-            sub_80A456C(gUnknown_3001B78, 0, localArray);
-            break;
-        }
-        case 16: {
-            s32 localArray[2];
-
-            gUnknown_3001B74->unk4 += 2;
-            gUnknown_3001B74->unkC += gUnknown_3001B74->unk4 / 4;
-            sub_80A4580(gUnknown_3001B78, 0, &gUnknown_3001B74->unkC);
-            gUnknown_3001B74->unk4 &= 3;
-            sub_80A56C0(localArray);
-            localArray[0] -= gUnknown_3001B74->unkC;
-            localArray[1] = 0;
-            sub_80A4580(gUnknown_3001B78, 0, localArray);
-            sub_80A456C(gUnknown_3001B78, 0, localArray);
-            break;
-        }
-        default: {
-            s32 localArray[2];
-            const s16 *puVar1 = gUnknown_811E5F4[gUnknown_3001B74->unk0];
-            if (puVar1[0] == 0) {
-                sub_80A56C0(localArray);
-                sub_80A456C(gUnknown_3001B78,0,localArray);
-                break;
-            }
-        }
-        // NOTE: Fallthrough needed here.
-        case 0:
-            sub_80A456C(gUnknown_3001B78, 0, gUnknown_81177BC);
-            break;
-    }
-
-    sub_80A4764(gUnknown_3001B78);
-}
-
-static void sub_80A62D0(void)
-{
-    if (gUnknown_3001B74->unk2 != 0)
-        sub_80A49E8(gUnknown_3001B78);
-}
diff --git a/src/ground_script.c b/src/ground_script.c
index 13c50f1b7..6b97d2971 100644
--- a/src/ground_script.c
+++ b/src/ground_script.c
@@ -160,8 +160,8 @@ bool8 sub_80A87E0();
 s16 sub_80A8BFC(s16);
 void sub_80A8F50(const u8 *buffer, s32, s32 size);
 void sub_80A56A0(s32, s32);
-void sub_80A56F0(s32 *);
-void sub_80A5704(s32 *);
+void sub_80A56F0(PixelPos *);
+void sub_80A5704(PixelPos *);
 void sub_80A86C8(s16, s32);
 void sub_80AC1B0(s16, s32);
 void sub_80AD0C8(s16, s32);
@@ -3720,17 +3720,17 @@ s32 sub_80A14E8(Action *action, u8 idx, u32 r2, s32 r3)
             sub_80A56A0(0, 1);
             return 0;
         case 0x36: {
-            s32 sp_328[2];
-            sp_328[0] = r2;
-            sp_328[1] = r3;
-            sub_80A56F0(sp_328);
+            PixelPos sp_328;
+            sp_328.x = r2;
+            sp_328.y = r3;
+            sub_80A56F0(&sp_328);
             return 0;
         }
         case 0x37: {
-            s32 sp_330[2];
-            sp_330[0] = r2;
-            sp_330[1] = r3;
-            sub_80A5704(sp_330);
+            PixelPos sp_330;
+            sp_330.x = r2;
+            sp_330.y = r3;
+            sub_80A5704(&sp_330);
             return 0;
         }
         case 0x39:
diff --git a/src/ground_script_file.c b/src/ground_script_file.c
index 069b27c67..e8d9830e5 100644
--- a/src/ground_script_file.c
+++ b/src/ground_script_file.c
@@ -1,5 +1,6 @@
 #include "global.h"
 #include "globaldata.h"
+#include "debug.h"
 #include "map_script_table.h"
 
 static EWRAM_DATA s16 sScriptFileId = {0};
@@ -50,7 +51,7 @@ bool8 ChangeScriptFile(s16 a0)
 
 static const struct GroundScriptHeader sNullGroundScript = {0};
 
-const struct GroundScriptHeader *GetGroundScript(s16 mapId)
+const struct GroundScriptHeader *GetGroundScript(s16 mapId, const DebugLocation *unused)
 {
     if (mapId != -1)
         return gMapScriptTable[mapId];
diff --git a/src/ground_sprite.c b/src/ground_sprite.c
index 1202a583c..265ede12c 100644
--- a/src/ground_sprite.c
+++ b/src/ground_sprite.c
@@ -5,7 +5,7 @@
 #include "debug.h"
 #include "def_filearchives.h"
 #include "file_system.h"
-#include "ground_map_1.h"
+#include "ground_map.h"
 #include "ground_sprite.h"
 #include "ground_sprite_data.h"
 #include "memory.h"
diff --git a/asm/rom_header.inc b/src/rom_header.s
similarity index 84%
rename from asm/rom_header.inc
rename to src/rom_header.s
index 6730efae2..5f482503f 100644
--- a/asm/rom_header.inc
+++ b/src/rom_header.s
@@ -1,4 +1,9 @@
-	.global RomHeaderNintendoLogo
+
+	.global Start
+Start: @ 8000000
+	b Init
+
+    .global RomHeaderNintendoLogo
 RomHeaderNintendoLogo:
 	.space 156
 
diff --git a/sym_iwram_init.txt b/sym_iwram_init.txt
index a3f8f371f..fad124f42 100644
--- a/sym_iwram_init.txt
+++ b/sym_iwram_init.txt
@@ -6,7 +6,7 @@
 .include "src/textbox.o"
 .include "src/unk_ds_only_feature.o"
 .include "src/ground_map.o"
-.include "src/ground_map_2.o"
+.include "src/ground_map_1.o"
 .include "src/ground_sprite.o"
 .include "src/ground_lives.o"
 .include "src/ground_object.o"