decompile sub_80FAB78 - sub_80FAFC0

2 files changed, 264 insertions, 820 deletions

diff --git a/asm/region_map.s b/asm/region_map.s
index d0d073a1b..ade656aa0 100644
--- a/asm/region_map.s
+++ b/asm/region_map.s
@@ -6,818 +6,6 @@
 
 	.text
 
-	thumb_func_start sub_80FAB78
-sub_80FAB78: @ 80FAB78
-	push {r4,lr}
-	movs r4, 0
-	ldr r2, _080FAC14 @ =gUnknown_020388CC
-	ldr r0, [r2]
-	adds r0, 0x7B
-	strb r4, [r0]
-	ldr r0, [r2]
-	adds r0, 0x7C
-	strb r4, [r0]
-	ldr r3, _080FAC18 @ =gMain
-	ldrh r1, [r3, 0x2C]
-	movs r0, 0x40
-	ands r0, r1
-	cmp r0, 0
-	beq _080FABAA
-	ldr r1, [r2]
-	adds r0, r1, 0
-	adds r0, 0x56
-	ldrh r0, [r0]
-	cmp r0, 0x2
-	bls _080FABAA
-	adds r1, 0x7C
-	movs r0, 0xFF
-	strb r0, [r1]
-	movs r4, 0x1
-_080FABAA:
-	ldrh r1, [r3, 0x2C]
-	movs r0, 0x80
-	ands r0, r1
-	cmp r0, 0
-	beq _080FABC8
-	ldr r1, [r2]
-	adds r0, r1, 0
-	adds r0, 0x56
-	ldrh r0, [r0]
-	cmp r0, 0xF
-	bhi _080FABC8
-	adds r1, 0x7C
-	movs r0, 0x1
-	strb r0, [r1]
-	movs r4, 0x1
-_080FABC8:
-	ldrh r1, [r3, 0x2C]
-	movs r0, 0x20
-	ands r0, r1
-	cmp r0, 0
-	beq _080FABE6
-	ldr r1, [r2]
-	adds r0, r1, 0
-	adds r0, 0x54
-	ldrh r0, [r0]
-	cmp r0, 0x1
-	bls _080FABE6
-	adds r1, 0x7B
-	movs r0, 0xFF
-	strb r0, [r1]
-	movs r4, 0x1
-_080FABE6:
-	ldrh r1, [r3, 0x2C]
-	movs r0, 0x10
-	ands r0, r1
-	cmp r0, 0
-	beq _080FAC04
-	ldr r1, [r2]
-	adds r0, r1, 0
-	adds r0, 0x54
-	ldrh r0, [r0]
-	cmp r0, 0x1B
-	bhi _080FAC04
-	adds r1, 0x7B
-	movs r0, 0x1
-	strb r0, [r1]
-	movs r4, 0x1
-_080FAC04:
-	ldrh r3, [r3, 0x2E]
-	movs r0, 0x1
-	ands r0, r3
-	cmp r0, 0
-	beq _080FAC1C
-	movs r4, 0x4
-	b _080FAC26
-	.align 2, 0
-_080FAC14: .4byte gUnknown_020388CC
-_080FAC18: .4byte gMain
-_080FAC1C:
-	movs r0, 0x2
-	ands r0, r3
-	cmp r0, 0
-	beq _080FAC26
-	movs r4, 0x5
-_080FAC26:
-	cmp r4, 0x1
-	bne _080FAC38
-	ldr r0, [r2]
-	adds r0, 0x7A
-	movs r1, 0x4
-	strb r1, [r0]
-	ldr r1, [r2]
-	ldr r0, _080FAC40 @ =_swiopen
-	str r0, [r1, 0x18]
-_080FAC38:
-	adds r0, r4, 0
-	pop {r4}
-	pop {r1}
-	bx r1
-	.align 2, 0
-_080FAC40: .4byte _swiopen
-	thumb_func_end sub_80FAB78
-
-	thumb_func_start _swiopen
-_swiopen: @ 80FAC44
-	push {r4,r5,lr}
-	ldr r5, _080FAC5C @ =gUnknown_020388CC
-	ldr r1, [r5]
-	adds r0, r1, 0
-	adds r0, 0x7A
-	ldrb r0, [r0]
-	lsls r0, 24
-	asrs r0, 24
-	cmp r0, 0
-	beq _080FAC60
-	movs r0, 0x2
-	b _080FACFA
-	.align 2, 0
-_080FAC5C: .4byte gUnknown_020388CC
-_080FAC60:
-	adds r0, r1, 0
-	adds r0, 0x7B
-	ldrb r0, [r0]
-	lsls r0, 24
-	asrs r0, 24
-	cmp r0, 0
-	ble _080FAC76
-	adds r1, 0x54
-	ldrh r0, [r1]
-	adds r0, 0x1
-	strh r0, [r1]
-_080FAC76:
-	ldr r1, [r5]
-	adds r0, r1, 0
-	adds r0, 0x7B
-	ldrb r0, [r0]
-	lsls r0, 24
-	asrs r0, 24
-	cmp r0, 0
-	bge _080FAC8E
-	adds r1, 0x54
-	ldrh r0, [r1]
-	subs r0, 0x1
-	strh r0, [r1]
-_080FAC8E:
-	ldr r1, [r5]
-	adds r0, r1, 0
-	adds r0, 0x7C
-	ldrb r0, [r0]
-	lsls r0, 24
-	asrs r0, 24
-	cmp r0, 0
-	ble _080FACA6
-	adds r1, 0x56
-	ldrh r0, [r1]
-	adds r0, 0x1
-	strh r0, [r1]
-_080FACA6:
-	ldr r1, [r5]
-	adds r0, r1, 0
-	adds r0, 0x7C
-	ldrb r0, [r0]
-	lsls r0, 24
-	asrs r0, 24
-	cmp r0, 0
-	bge _080FACBE
-	adds r1, 0x56
-	ldrh r0, [r1]
-	subs r0, 0x1
-	strh r0, [r1]
-_080FACBE:
-	ldr r1, [r5]
-	adds r0, r1, 0
-	adds r0, 0x54
-	ldrh r0, [r0]
-	adds r1, 0x56
-	ldrh r1, [r1]
-	bl GetRegionMapSectionAt
-	lsls r0, 16
-	lsrs r4, r0, 16
-	adds r0, r4, 0
-	bl sub_80FB758
-	ldr r1, [r5]
-	strb r0, [r1, 0x16]
-	ldr r0, [r5]
-	ldrh r1, [r0, 0x14]
-	cmp r4, r1
-	beq _080FACEE
-	strh r4, [r0, 0x14]
-	ldrh r1, [r0, 0x14]
-	movs r2, 0x10
-	bl sub_80FBFB4
-_080FACEE:
-	bl sub_80FBA18
-	ldr r1, [r5]
-	ldr r0, _080FAD00 @ =sub_80FAB78
-	str r0, [r1, 0x18]
-	movs r0, 0x3
-_080FACFA:
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	.align 2, 0
-_080FAD00: .4byte sub_80FAB78
-	thumb_func_end _swiopen
-
-	thumb_func_start sub_80FAD04
-sub_80FAD04: @ 80FAD04
-	push {r4-r6,lr}
-	movs r4, 0
-	ldr r3, _080FADD4 @ =gUnknown_020388CC
-	ldr r0, [r3]
-	mov r12, r0
-	adds r0, 0x6A
-	strh r4, [r0]
-	mov r5, r12
-	adds r5, 0x68
-	strh r4, [r5]
-	ldr r2, _080FADD8 @ =gMain
-	ldrh r1, [r2, 0x2C]
-	movs r0, 0x40
-	ands r0, r1
-	adds r6, r3, 0
-	adds r3, r2, 0
-	cmp r0, 0
-	beq _080FAD3E
-	mov r0, r12
-	adds r0, 0x5E
-	movs r2, 0
-	ldrsh r1, [r0, r2]
-	movs r0, 0x34
-	negs r0, r0
-	cmp r1, r0
-	ble _080FAD3E
-	ldr r0, _080FADDC @ =0x0000ffff
-	strh r0, [r5]
-	movs r4, 0x1
-_080FAD3E:
-	ldrh r1, [r3, 0x2C]
-	movs r0, 0x80
-	ands r0, r1
-	cmp r0, 0
-	beq _080FAD5E
-	ldr r1, [r6]
-	adds r0, r1, 0
-	adds r0, 0x5E
-	movs r5, 0
-	ldrsh r0, [r0, r5]
-	cmp r0, 0x3B
-	bgt _080FAD5E
-	adds r1, 0x68
-	movs r0, 0x1
-	strh r0, [r1]
-	movs r4, 0x1
-_080FAD5E:
-	ldrh r1, [r3, 0x2C]
-	movs r0, 0x20
-	ands r0, r1
-	cmp r0, 0
-	beq _080FAD84
-	ldr r2, [r6]
-	adds r0, r2, 0
-	adds r0, 0x5C
-	movs r5, 0
-	ldrsh r1, [r0, r5]
-	movs r0, 0x2C
-	negs r0, r0
-	cmp r1, r0
-	ble _080FAD84
-	adds r1, r2, 0
-	adds r1, 0x6A
-	ldr r0, _080FADDC @ =0x0000ffff
-	strh r0, [r1]
-	movs r4, 0x1
-_080FAD84:
-	ldrh r1, [r3, 0x2C]
-	movs r0, 0x10
-	ands r0, r1
-	cmp r0, 0
-	beq _080FADA4
-	ldr r1, [r6]
-	adds r0, r1, 0
-	adds r0, 0x5C
-	movs r2, 0
-	ldrsh r0, [r0, r2]
-	cmp r0, 0xAB
-	bgt _080FADA4
-	adds r1, 0x6A
-	movs r0, 0x1
-	strh r0, [r1]
-	movs r4, 0x1
-_080FADA4:
-	ldrh r2, [r3, 0x2E]
-	movs r0, 0x1
-	ands r0, r2
-	cmp r0, 0
-	beq _080FADB0
-	movs r4, 0x4
-_080FADB0:
-	movs r0, 0x2
-	ands r0, r2
-	cmp r0, 0
-	beq _080FADBA
-	movs r4, 0x5
-_080FADBA:
-	cmp r4, 0x1
-	bne _080FADCA
-	ldr r0, [r6]
-	ldr r1, _080FADE0 @ =sub_80FADE4
-	str r1, [r0, 0x18]
-	adds r0, 0x6C
-	movs r1, 0
-	strh r1, [r0]
-_080FADCA:
-	adds r0, r4, 0
-	pop {r4-r6}
-	pop {r1}
-	bx r1
-	.align 2, 0
-_080FADD4: .4byte gUnknown_020388CC
-_080FADD8: .4byte gMain
-_080FADDC: .4byte 0x0000ffff
-_080FADE0: .4byte sub_80FADE4
-	thumb_func_end sub_80FAD04
-
-	thumb_func_start sub_80FADE4
-sub_80FADE4: @ 80FADE4
-	push {r4,r5,lr}
-	ldr r5, _080FAEB4 @ =gUnknown_020388CC
-	ldr r2, [r5]
-	adds r3, r2, 0
-	adds r3, 0x5E
-	adds r0, r2, 0
-	adds r0, 0x68
-	ldrh r0, [r0]
-	ldrh r1, [r3]
-	adds r0, r1
-	strh r0, [r3]
-	adds r1, r2, 0
-	adds r1, 0x5C
-	adds r0, r2, 0
-	adds r0, 0x6A
-	ldrh r0, [r0]
-	ldrh r2, [r1]
-	adds r0, r2
-	strh r0, [r1]
-	movs r4, 0
-	ldrsh r0, [r1, r4]
-	movs r2, 0
-	ldrsh r1, [r3, r2]
-	bl sub_80FB238
-	ldr r2, [r5]
-	adds r1, r2, 0
-	adds r1, 0x6C
-	ldrh r0, [r1]
-	adds r0, 0x1
-	strh r0, [r1]
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0x8
-	bne _080FAEBC
-	adds r0, r2, 0
-	adds r0, 0x5C
-	movs r3, 0
-	ldrsh r1, [r0, r3]
-	adds r0, r1, 0
-	adds r0, 0x2C
-	cmp r0, 0
-	bge _080FAE3C
-	adds r0, 0x7
-_080FAE3C:
-	asrs r0, 3
-	adds r0, 0x1
-	lsls r0, 16
-	lsrs r3, r0, 16
-	adds r0, r2, 0
-	adds r0, 0x5E
-	movs r4, 0
-	ldrsh r1, [r0, r4]
-	adds r0, r1, 0
-	adds r0, 0x34
-	cmp r0, 0
-	bge _080FAE56
-	adds r0, 0x7
-_080FAE56:
-	asrs r0, 3
-	adds r0, 0x2
-	lsls r0, 16
-	lsrs r1, r0, 16
-	adds r4, r2, 0
-	adds r4, 0x64
-	adds r0, r2, 0
-	adds r0, 0x66
-	ldrh r2, [r4]
-	cmp r3, r2
-	bne _080FAE72
-	ldrh r2, [r0]
-	cmp r1, r2
-	beq _080FAEA0
-_080FAE72:
-	strh r3, [r4]
-	strh r1, [r0]
-	adds r0, r3, 0
-	bl GetRegionMapSectionAt
-	lsls r0, 16
-	lsrs r4, r0, 16
-	adds r0, r4, 0
-	bl sub_80FB758
-	ldr r1, [r5]
-	strb r0, [r1, 0x16]
-	ldr r0, [r5]
-	ldrh r3, [r0, 0x14]
-	cmp r4, r3
-	beq _080FAE9C
-	strh r4, [r0, 0x14]
-	ldrh r1, [r0, 0x14]
-	movs r2, 0x10
-	bl sub_80FBFB4
-_080FAE9C:
-	bl sub_80FBA18
-_080FAEA0:
-	ldr r0, _080FAEB4 @ =gUnknown_020388CC
-	ldr r2, [r0]
-	adds r1, r2, 0
-	adds r1, 0x6C
-	movs r0, 0
-	strh r0, [r1]
-	ldr r0, _080FAEB8 @ =sub_80FAD04
-	str r0, [r2, 0x18]
-	movs r0, 0x3
-	b _080FAEBE
-	.align 2, 0
-_080FAEB4: .4byte gUnknown_020388CC
-_080FAEB8: .4byte sub_80FAD04
-_080FAEBC:
-	movs r0, 0x2
-_080FAEBE:
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80FADE4
-
-	thumb_func_start sub_80FAEC4
-sub_80FAEC4: @ 80FAEC4
-	push {r4-r6,lr}
-	ldr r1, _080FAF40 @ =gUnknown_020388CC
-	ldr r2, [r1]
-	adds r0, r2, 0
-	adds r0, 0x78
-	ldrb r3, [r0]
-	adds r5, r1, 0
-	cmp r3, 0
-	bne _080FAF48
-	subs r0, 0x1A
-	strh r3, [r0]
-	subs r0, 0x2
-	strh r3, [r0]
-	str r3, [r2, 0x40]
-	str r3, [r2, 0x3C]
-	adds r4, r2, 0
-	adds r4, 0x54
-	ldrh r0, [r4]
-	lsls r0, 3
-	subs r0, 0x34
-	adds r1, r2, 0
-	adds r1, 0x60
-	strh r0, [r1]
-	movs r0, 0x56
-	adds r0, r2
-	mov r12, r0
-	ldrh r0, [r0]
-	lsls r0, 3
-	subs r0, 0x44
-	adds r3, r2, 0
-	adds r3, 0x62
-	strh r0, [r3]
-	movs r6, 0
-	ldrsh r0, [r1, r6]
-	lsls r0, 8
-	cmp r0, 0
-	bge _080FAF10
-	adds r0, 0xF
-_080FAF10:
-	asrs r0, 4
-	str r0, [r2, 0x44]
-	movs r1, 0
-	ldrsh r0, [r3, r1]
-	lsls r0, 8
-	cmp r0, 0
-	bge _080FAF20
-	adds r0, 0xF
-_080FAF20:
-	asrs r0, 4
-	str r0, [r2, 0x48]
-	ldrh r1, [r4]
-	adds r0, r2, 0
-	adds r0, 0x64
-	strh r1, [r0]
-	mov r3, r12
-	ldrh r0, [r3]
-	adds r1, r2, 0
-	adds r1, 0x66
-	strh r0, [r1]
-	movs r0, 0x80
-	lsls r0, 9
-	str r0, [r2, 0x4C]
-	ldr r0, _080FAF44 @ =0xfffff800
-	b _080FAFA6
-	.align 2, 0
-_080FAF40: .4byte gUnknown_020388CC
-_080FAF44: .4byte 0xfffff800
-_080FAF48:
-	adds r0, r2, 0
-	adds r0, 0x5C
-	movs r6, 0
-	ldrsh r0, [r0, r6]
-	lsls r0, 8
-	str r0, [r2, 0x3C]
-	adds r0, r2, 0
-	adds r0, 0x5E
-	movs r1, 0
-	ldrsh r0, [r0, r1]
-	lsls r0, 8
-	str r0, [r2, 0x40]
-	adds r0, r2, 0
-	adds r0, 0x60
-	movs r1, 0
-	strh r1, [r0]
-	adds r0, 0x2
-	strh r1, [r0]
-	ldr r0, [r2, 0x3C]
-	cmp r0, 0
-	bge _080FAF74
-	adds r0, 0xF
-_080FAF74:
-	asrs r0, 4
-	negs r0, r0
-	str r0, [r2, 0x44]
-	ldr r0, [r2, 0x40]
-	cmp r0, 0
-	bge _080FAF82
-	adds r0, 0xF
-_080FAF82:
-	asrs r0, 4
-	negs r0, r0
-	str r0, [r2, 0x48]
-	adds r0, r2, 0
-	adds r0, 0x64
-	ldrh r1, [r0]
-	subs r0, 0x10
-	strh r1, [r0]
-	adds r0, 0x12
-	ldrh r0, [r0]
-	adds r1, r2, 0
-	adds r1, 0x56
-	strh r0, [r1]
-	movs r0, 0x80
-	lsls r0, 8
-	str r0, [r2, 0x4C]
-	movs r0, 0x80
-	lsls r0, 4
-_080FAFA6:
-	str r0, [r2, 0x50]
-	ldr r0, [r5]
-	adds r0, 0x6E
-	movs r1, 0
-	strh r1, [r0]
-	bl sub_80FBCA0
-	bl sub_80FBDF8
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80FAEC4
-
-	thumb_func_start sub_80FAFC0
-sub_80FAFC0: @ 80FAFC0
-	push {r4-r6,lr}
-	sub sp, 0xC
-	ldr r0, _080FAFD8 @ =gUnknown_020388CC
-	ldr r3, [r0]
-	adds r2, r3, 0
-	adds r2, 0x6E
-	ldrh r1, [r2]
-	adds r5, r0, 0
-	cmp r1, 0xF
-	bls _080FAFDC
-	movs r0, 0
-	b _080FB164
-	.align 2, 0
-_080FAFD8: .4byte gUnknown_020388CC
-_080FAFDC:
-	adds r0, r1, 0x1
-	movs r1, 0
-	strh r0, [r2]
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0x10
-	bne _080FB050
-	str r1, [r3, 0x44]
-	str r1, [r3, 0x48]
-	adds r0, r3, 0
-	adds r0, 0x60
-	ldrh r1, [r0]
-	subs r0, 0x4
-	strh r1, [r0]
-	adds r0, 0x6
-	ldrh r0, [r0]
-	adds r1, r3, 0
-	adds r1, 0x5E
-	strh r0, [r1]
-	adds r1, 0x1A
-	ldrb r0, [r1]
-	movs r2, 0x80
-	lsls r2, 9
-	cmp r0, 0
-	bne _080FB012
-	movs r2, 0x80
-	lsls r2, 8
-_080FB012:
-	str r2, [r3, 0x4C]
-	movs r2, 0
-	ldrb r0, [r1]
-	cmp r0, 0
-	bne _080FB01E
-	movs r2, 0x1
-_080FB01E:
-	strb r2, [r1]
-	ldr r1, [r5]
-	adds r0, r1, 0
-	adds r0, 0x78
-	ldrb r0, [r0]
-	ldr r2, _080FB048 @ =sub_80FAD04
-	cmp r0, 0
-	bne _080FB030
-	ldr r2, _080FB04C @ =sub_80FAB78
-_080FB030:
-	str r2, [r1, 0x18]
-	adds r0, r1, 0
-	adds r0, 0x58
-	ldrh r0, [r0]
-	adds r1, 0x5A
-	ldrh r1, [r1]
-	bl sub_80FBB3C
-	bl sub_80FBE24
-	movs r4, 0
-	b _080FB132
-	.align 2, 0
-_080FB048: .4byte sub_80FAD04
-_080FB04C: .4byte sub_80FAB78
-_080FB050:
-	ldr r2, [r3, 0x3C]
-	ldr r0, [r3, 0x44]
-	adds r2, r0
-	str r2, [r3, 0x3C]
-	ldr r0, [r3, 0x40]
-	ldr r1, [r3, 0x48]
-	adds r0, r1
-	str r0, [r3, 0x40]
-	asrs r2, 8
-	adds r4, r3, 0
-	adds r4, 0x5C
-	strh r2, [r4]
-	ldr r0, [r3, 0x40]
-	asrs r0, 8
-	adds r1, r3, 0
-	adds r1, 0x5E
-	strh r0, [r1]
-	ldr r0, [r3, 0x4C]
-	ldr r1, [r3, 0x50]
-	adds r0, r1
-	str r0, [r3, 0x4C]
-	ldr r2, [r3, 0x44]
-	cmp r2, 0
-	bge _080FB090
-	adds r0, r3, 0
-	adds r0, 0x60
-	movs r6, 0
-	ldrsh r1, [r4, r6]
-	movs r6, 0
-	ldrsh r0, [r0, r6]
-	cmp r1, r0
-	blt _080FB0A4
-_080FB090:
-	cmp r2, 0
-	ble _080FB0B4
-	adds r0, r3, 0
-	adds r0, 0x60
-	movs r2, 0
-	ldrsh r1, [r4, r2]
-	movs r6, 0
-	ldrsh r0, [r0, r6]
-	cmp r1, r0
-	ble _080FB0B4
-_080FB0A4:
-	ldr r3, [r5]
-	adds r0, r3, 0
-	adds r0, 0x60
-	ldrh r2, [r0]
-	subs r0, 0x4
-	movs r1, 0
-	strh r2, [r0]
-	str r1, [r3, 0x44]
-_080FB0B4:
-	ldr r2, [r5]
-	ldr r4, [r2, 0x48]
-	cmp r4, 0
-	bge _080FB0D0
-	adds r0, r2, 0
-	adds r0, 0x5E
-	adds r3, r2, 0
-	adds r3, 0x62
-	movs r6, 0
-	ldrsh r1, [r0, r6]
-	movs r6, 0
-	ldrsh r0, [r3, r6]
-	cmp r1, r0
-	blt _080FB0E8
-_080FB0D0:
-	cmp r4, 0
-	ble _080FB0FA
-	adds r1, r2, 0
-	adds r1, 0x5E
-	adds r0, r2, 0
-	adds r0, 0x62
-	movs r2, 0
-	ldrsh r1, [r1, r2]
-	movs r6, 0
-	ldrsh r0, [r0, r6]
-	cmp r1, r0
-	ble _080FB0FA
-_080FB0E8:
-	ldr r2, [r5]
-	adds r0, r2, 0
-	adds r0, 0x62
-	ldrh r1, [r0]
-	adds r3, r2, 0
-	adds r3, 0x5E
-	movs r0, 0
-	strh r1, [r3]
-	str r0, [r2, 0x48]
-_080FB0FA:
-	ldr r0, _080FB118 @ =gUnknown_020388CC
-	ldr r2, [r0]
-	adds r0, r2, 0
-	adds r0, 0x78
-	ldrb r3, [r0]
-	cmp r3, 0
-	bne _080FB120
-	ldr r1, [r2, 0x4C]
-	ldr r0, _080FB11C @ =0x00007fff
-	cmp r1, r0
-	bgt _080FB130
-	adds r0, 0x1
-	str r0, [r2, 0x4C]
-	str r3, [r2, 0x50]
-	b _080FB130
-	.align 2, 0
-_080FB118: .4byte gUnknown_020388CC
-_080FB11C: .4byte 0x00007fff
-_080FB120:
-	ldr r0, [r2, 0x4C]
-	movs r1, 0x80
-	lsls r1, 9
-	cmp r0, r1
-	ble _080FB130
-	str r1, [r2, 0x4C]
-	movs r0, 0
-	str r0, [r2, 0x50]
-_080FB130:
-	movs r4, 0x1
-_080FB132:
-	ldr r0, _080FB16C @ =gUnknown_020388CC
-	ldr r3, [r0]
-	adds r0, r3, 0
-	adds r0, 0x5C
-	movs r1, 0
-	ldrsh r0, [r0, r1]
-	adds r1, r3, 0
-	adds r1, 0x5E
-	movs r2, 0
-	ldrsh r1, [r1, r2]
-	ldr r2, [r3, 0x4C]
-	lsls r2, 8
-	lsrs r2, 16
-	str r2, [sp]
-	ldr r2, [r3, 0x4C]
-	lsls r2, 8
-	lsrs r2, 16
-	str r2, [sp, 0x4]
-	movs r2, 0
-	str r2, [sp, 0x8]
-	movs r2, 0x38
-	movs r3, 0x48
-	bl sub_80FB170
-	adds r0, r4, 0
-_080FB164:
-	add sp, 0xC
-	pop {r4-r6}
-	pop {r1}
-	bx r1
-	.align 2, 0
-_080FB16C: .4byte gUnknown_020388CC
-	thumb_func_end sub_80FAFC0
-
 	thumb_func_start sub_80FB170
 sub_80FB170: @ 80FB170
 	push {r4-r7,lr}
diff --git a/src/region_map.c b/src/region_map.c
index 301c3c082..0a50da51e 100644
--- a/src/region_map.c
+++ b/src/region_map.c
@@ -1,4 +1,5 @@
 #include "global.h"
+#include "main.h"
 #include "palette.h"
 #include "sprite.h"
 
@@ -11,25 +12,37 @@ struct UnknownStruct1
     u8 (*unk18)(void);
     struct Sprite *unk1C;
     struct Sprite *unk20;
-    u8 filler24[0x30];
-    u16 unk54;
-    u16 unk56;
+    u8 filler24[0x18];
+    s32 unk3C;
+    s32 unk40;
+    s32 unk44;
+    s32 unk48;
+    s32 unk4C;
+    u32 unk50;
+    u16 unk54;  // cursor x
+    u16 unk56;  // cursor y
     u16 unk58;
     u16 unk5A;
     s16 unk5C;
     s16 unk5E;
-    u8 filler60[4];
+    s16 unk60;
+    s16 unk62;
     u16 unk64;
     u16 unk66;
-    u8 filler68[8];
+    u16 unk68;
+    u16 unk6A;
+    u16 unk6C;
+    u16 unk6E;
     u16 unk70;
     u16 unk72;
     u16 unk74;
     u16 unk76;
     u8 unk78;
     u8 unk79;
-    u8 unk7A;
-    u8 filler7B[3];
+    s8 unk7A;
+    s8 unk7B;  // movement delta horizontal
+    s8 unk7C;  // movement delta vertical
+    u8 unk7D;
     u8 unk7E;
     u8 filler7F[0x101];
     u8 unk180[0x100];
@@ -52,13 +65,21 @@ const u8 gUnknown_083E6B04[] = INCBIN_U8("graphics/pokenav/region_map_map.bin.lz
 void sub_80FA904(struct UnknownStruct1 *, u8);
 bool8 sub_80FA940(void);
 u8 sub_80FAB78(void);
+u8 _swiopen(void);
 u8 sub_80FAD04(void);
-void sub_80FB170();
+u8 sub_80FADE4(void);
+void sub_80FB170(int, int, int, int, u16, u16, int);
+void sub_80FB238();
 void sub_80FB260(void);
+u16 GetRegionMapSectionAt();
 void sub_80FB32C(void);
 u16 sub_80FB758();
 u16 sub_80FB9C0(u16);
 void sub_80FBA18();
+void sub_80FBB3C();
+void sub_80FBCA0(void);
+void sub_80FBDF8(void);
+void sub_80FBE24(void);
 void sub_80FBFB4();
 
 void sub_80FA8EC(struct UnknownStruct1 *a, u8 b)
@@ -153,3 +174,238 @@ u8 sub_80FAB60(void)
 {
     return gUnknown_020388CC->unk18();
 }
+
+u8 sub_80FAB78(void)
+{
+    u8 r4 = 0;
+
+    gUnknown_020388CC->unk7B = 0;
+    gUnknown_020388CC->unk7C = 0;
+    if ((gMain.heldKeys & DPAD_UP) && gUnknown_020388CC->unk56 > 2)
+    {
+        gUnknown_020388CC->unk7C = -1;
+        r4 = 1;
+    }
+    if ((gMain.heldKeys & DPAD_DOWN) && gUnknown_020388CC->unk56 < 16)
+    {
+        gUnknown_020388CC->unk7C = 1;
+        r4 = 1;
+    }
+    if ((gMain.heldKeys & DPAD_LEFT) && gUnknown_020388CC->unk54 > 1)
+    {
+        gUnknown_020388CC->unk7B = -1;
+        r4 = 1;
+    }
+    if ((gMain.heldKeys & DPAD_RIGHT) && gUnknown_020388CC->unk54 < 0x1C)
+    {
+        gUnknown_020388CC->unk7B = 1;
+        r4 = 1;
+    }
+    if (gMain.newKeys & A_BUTTON)
+        r4 = 4;
+    else if (gMain.newKeys & B_BUTTON)
+        r4 = 5;
+    if (r4 == 1)
+    {
+        gUnknown_020388CC->unk7A = 4;
+        gUnknown_020388CC->unk18 = _swiopen;
+    }
+    return r4;
+}
+
+u8 _swiopen(void)
+{
+    u16 r4;
+
+    if (gUnknown_020388CC->unk7A != 0)
+        return 2;
+
+    if (gUnknown_020388CC->unk7B > 0)
+        gUnknown_020388CC->unk54++;
+
+    if (gUnknown_020388CC->unk7B < 0)
+        gUnknown_020388CC->unk54--;
+
+    if (gUnknown_020388CC->unk7C > 0)
+        gUnknown_020388CC->unk56++;
+
+    if (gUnknown_020388CC->unk7C < 0)
+        gUnknown_020388CC->unk56--;
+
+    r4 = GetRegionMapSectionAt(gUnknown_020388CC->unk54, gUnknown_020388CC->unk56);
+    gUnknown_020388CC->unk16 = sub_80FB758(r4);
+    if (r4 != gUnknown_020388CC->unk14)
+    {
+        gUnknown_020388CC->unk14 = r4;
+        sub_80FBFB4(gUnknown_020388CC, gUnknown_020388CC->unk14, 16);
+    }
+    sub_80FBA18();
+    gUnknown_020388CC->unk18 = sub_80FAB78;
+    return 3;
+}
+
+u8 sub_80FAD04(void)
+{
+    u8 r4 = 0;
+    gUnknown_020388CC->unk6A = 0;
+    gUnknown_020388CC->unk68 = 0;
+    if ((gMain.heldKeys & 0x40) && gUnknown_020388CC->unk5E > -0x34)
+    {
+        gUnknown_020388CC->unk68 = -1;
+        r4 = 1;
+    }
+    if ((gMain.heldKeys & 0x80) && gUnknown_020388CC->unk5E < 0x3C)
+    {
+        gUnknown_020388CC->unk68 = 1;
+        r4 = 1;
+    }
+    if ((gMain.heldKeys & 0x20) && gUnknown_020388CC->unk5C > -0x2C)
+    {
+        gUnknown_020388CC->unk6A = -1;
+        r4 = 1;
+    }
+    if ((gMain.heldKeys & 0x10) && gUnknown_020388CC->unk5C < 0xAC)
+    {
+        gUnknown_020388CC->unk6A = 1;
+        r4 = 1;
+    }
+    if (gMain.newKeys & A_BUTTON)
+        r4 = 4;
+    if (gMain.newKeys & B_BUTTON)
+        r4 = 5;
+    if (r4 == 1)
+    {
+        gUnknown_020388CC->unk18 = sub_80FADE4;
+        gUnknown_020388CC->unk6C = 0;
+    }
+    return r4;
+}
+
+u8 sub_80FADE4(void)
+{
+    gUnknown_020388CC->unk5E += gUnknown_020388CC->unk68;
+    gUnknown_020388CC->unk5C += gUnknown_020388CC->unk6A;
+    sub_80FB238(gUnknown_020388CC->unk5C, gUnknown_020388CC->unk5E);
+    gUnknown_020388CC->unk6C++;
+    if (gUnknown_020388CC->unk6C == 8)
+    {
+        u16 r3 = (gUnknown_020388CC->unk5C + 0x2C) / 8 + 1;
+        u16 r1 = (gUnknown_020388CC->unk5E + 0x34) / 8 + 2;
+
+        if (r3 != gUnknown_020388CC->unk64 || r1 != gUnknown_020388CC->unk66)
+        {
+            u16 r4;
+
+            gUnknown_020388CC->unk64 = r3;
+            gUnknown_020388CC->unk66 = r1;
+            r4 = GetRegionMapSectionAt(r3, r1);
+            gUnknown_020388CC->unk16 = sub_80FB758(r4);
+            if (r4 != gUnknown_020388CC->unk14)
+            {
+                gUnknown_020388CC->unk14 = r4;
+                sub_80FBFB4(gUnknown_020388CC, gUnknown_020388CC->unk14, 16);
+            }
+            sub_80FBA18();
+        }
+        gUnknown_020388CC->unk6C = 0;
+        gUnknown_020388CC->unk18 = sub_80FAD04;
+        return 3;
+    }
+    return 2;
+}
+
+void sub_80FAEC4(void)
+{
+    if (gUnknown_020388CC->unk78 == 0)
+    {
+        gUnknown_020388CC->unk5E = 0;
+        gUnknown_020388CC->unk5C = 0;
+        gUnknown_020388CC->unk40 = 0;
+        gUnknown_020388CC->unk3C = 0;
+        gUnknown_020388CC->unk60 = gUnknown_020388CC->unk54 * 8 - 0x34;
+        gUnknown_020388CC->unk62 = gUnknown_020388CC->unk56 * 8 - 0x44;
+        gUnknown_020388CC->unk44 = (gUnknown_020388CC->unk60 << 8) / 16;
+        gUnknown_020388CC->unk48 = (gUnknown_020388CC->unk62 << 8) / 16;
+        gUnknown_020388CC->unk64 = gUnknown_020388CC->unk54;
+        gUnknown_020388CC->unk66 = gUnknown_020388CC->unk56;
+        gUnknown_020388CC->unk4C = 0x10000;
+        gUnknown_020388CC->unk50 = -0x800;
+    }
+    else
+    {
+        gUnknown_020388CC->unk3C = gUnknown_020388CC->unk5C * 256;
+        gUnknown_020388CC->unk40 = gUnknown_020388CC->unk5E * 256;
+        gUnknown_020388CC->unk60 = 0;
+        gUnknown_020388CC->unk62 = 0;
+        gUnknown_020388CC->unk44 = -(gUnknown_020388CC->unk3C / 16);
+        gUnknown_020388CC->unk48 = -(gUnknown_020388CC->unk40 / 16);
+        gUnknown_020388CC->unk54 = gUnknown_020388CC->unk64;
+        gUnknown_020388CC->unk56 = gUnknown_020388CC->unk66;
+        gUnknown_020388CC->unk4C = 0x8000;
+        gUnknown_020388CC->unk50 = 0x800;
+    }
+    gUnknown_020388CC->unk6E = 0;
+    sub_80FBCA0();
+    sub_80FBDF8();
+}
+
+u8 sub_80FAFC0(void)
+{
+    u8 r4;
+
+    if (gUnknown_020388CC->unk6E > 15)
+        return 0;
+    gUnknown_020388CC->unk6E++;
+    if (gUnknown_020388CC->unk6E == 16)
+    {
+        gUnknown_020388CC->unk44 = 0;
+        gUnknown_020388CC->unk48 = 0;
+        gUnknown_020388CC->unk5C = gUnknown_020388CC->unk60;
+        gUnknown_020388CC->unk5E = gUnknown_020388CC->unk62;
+        gUnknown_020388CC->unk4C = (gUnknown_020388CC->unk78 == 0) ? 0x8000 : 0x10000;
+        gUnknown_020388CC->unk78 = (gUnknown_020388CC->unk78 == 0) ? 1 : 0;
+        gUnknown_020388CC->unk18 = (gUnknown_020388CC->unk78 == 0) ? sub_80FAB78 : sub_80FAD04;
+        sub_80FBB3C(gUnknown_020388CC->unk58, gUnknown_020388CC->unk5A);
+        sub_80FBE24();
+        r4 = 0;
+    }
+    else
+    {
+        gUnknown_020388CC->unk3C += gUnknown_020388CC->unk44;
+        gUnknown_020388CC->unk40 += gUnknown_020388CC->unk48;
+        gUnknown_020388CC->unk5C = gUnknown_020388CC->unk3C >> 8;
+        gUnknown_020388CC->unk5E = gUnknown_020388CC->unk40 >> 8;
+        gUnknown_020388CC->unk4C += gUnknown_020388CC->unk50;
+        if ((gUnknown_020388CC->unk44 < 0 && gUnknown_020388CC->unk5C < gUnknown_020388CC->unk60)
+         || (gUnknown_020388CC->unk44 > 0 && gUnknown_020388CC->unk5C > gUnknown_020388CC->unk60))
+        {
+            gUnknown_020388CC->unk5C = gUnknown_020388CC->unk60;
+            gUnknown_020388CC->unk44 = 0;
+        }
+        if ((gUnknown_020388CC->unk48 < 0 && gUnknown_020388CC->unk5E < gUnknown_020388CC->unk62)
+         || (gUnknown_020388CC->unk48 > 0 && gUnknown_020388CC->unk5E > gUnknown_020388CC->unk62))
+        {
+            gUnknown_020388CC->unk5E = gUnknown_020388CC->unk62;
+            gUnknown_020388CC->unk48 = 0;
+        }
+        if (gUnknown_020388CC->unk78 == 0)
+        {
+            if (gUnknown_020388CC->unk4C < 0x8000)
+            {
+                gUnknown_020388CC->unk4C = 0x8000;
+                gUnknown_020388CC->unk50 = 0;
+            }
+        }
+        else
+        {
+            if (gUnknown_020388CC->unk4C > 0x10000)
+            {
+                gUnknown_020388CC->unk4C = 0x10000;
+                gUnknown_020388CC->unk50 = 0;
+            }
+        }
+        r4 = 1;
+    }
+    sub_80FB170(gUnknown_020388CC->unk5C, gUnknown_020388CC->unk5E, 0x38, 0x48, gUnknown_020388CC->unk4C >> 8, gUnknown_020388CC->unk4C >> 8, 0);
+    return r4;
+}