Merge pull request #199 from DizzyEggg/decompile_rtc_screen

decompile rtc reset screen

8 files changed, 669 insertions, 1423 deletions

diff --git a/asm/reset_rtc_screen.s b/asm/reset_rtc_screen.s
deleted file mode 100644
index b314afbf5..000000000
--- a/asm/reset_rtc_screen.s
+++ /dev/null
@@ -1,1342 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start sub_809E8E8
-sub_809E8E8: @ 809E8E8
-	push {lr}
-	adds r3, r0, 0
-	ldr r2, =gTasks
-	movs r0, 0x2E
-	ldrsh r1, [r3, r0]
-	lsls r0, r1, 2
-	adds r0, r1
-	lsls r0, 3
-	adds r0, r2
-	movs r2, 0xC
-	ldrsh r1, [r0, r2]
-	movs r2, 0x30
-	ldrsh r0, [r3, r2]
-	cmp r1, r0
-	beq _0809E9FE
-	strh r1, [r3, 0x30]
-	subs r0, r1, 0x1
-	cmp r0, 0x5
-	bhi _0809E9FE
-	lsls r0, 2
-	ldr r1, =_0809E920
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.pool
-	.align 2, 0
-_0809E920:
-	.4byte _0809E938
-	.4byte _0809E95C
-	.4byte _0809E980
-	.4byte _0809E9A4
-	.4byte _0809E9CE
-	.4byte _0809E9F8
-_0809E938:
-	adds r2, r3, 0
-	adds r2, 0x3E
-	ldrb r1, [r2]
-	movs r0, 0x5
-	negs r0, r0
-	ands r0, r1
-	strb r0, [r2]
-	adds r1, r3, 0
-	adds r1, 0x2A
-	movs r0, 0x1
-	strb r0, [r1]
-	subs r2, 0x12
-	ldrb r1, [r2]
-	subs r0, 0x41
-	ands r0, r1
-	strb r0, [r2]
-	movs r0, 0x35
-	b _0809E9C6
-_0809E95C:
-	adds r2, r3, 0
-	adds r2, 0x3E
-	ldrb r1, [r2]
-	movs r0, 0x5
-	negs r0, r0
-	ands r0, r1
-	strb r0, [r2]
-	adds r1, r3, 0
-	adds r1, 0x2A
-	movs r0, 0x1
-	strb r0, [r1]
-	subs r2, 0x12
-	ldrb r1, [r2]
-	subs r0, 0x41
-	ands r0, r1
-	strb r0, [r2]
-	movs r0, 0x56
-	b _0809E9C6
-_0809E980:
-	adds r2, r3, 0
-	adds r2, 0x3E
-	ldrb r1, [r2]
-	movs r0, 0x5
-	negs r0, r0
-	ands r0, r1
-	strb r0, [r2]
-	adds r1, r3, 0
-	adds r1, 0x2A
-	movs r0, 0x1
-	strb r0, [r1]
-	subs r2, 0x12
-	ldrb r1, [r2]
-	subs r0, 0x41
-	ands r0, r1
-	strb r0, [r2]
-	movs r0, 0x65
-	b _0809E9C6
-_0809E9A4:
-	adds r2, r3, 0
-	adds r2, 0x3E
-	ldrb r1, [r2]
-	movs r0, 0x5
-	negs r0, r0
-	ands r0, r1
-	strb r0, [r2]
-	adds r1, r3, 0
-	adds r1, 0x2A
-	movs r0, 0x1
-	strb r0, [r1]
-	subs r2, 0x12
-	ldrb r1, [r2]
-	subs r0, 0x41
-	ands r0, r1
-	strb r0, [r2]
-	movs r0, 0x74
-_0809E9C6:
-	strh r0, [r3, 0x20]
-	movs r0, 0x44
-	strh r0, [r3, 0x22]
-	b _0809E9FE
-_0809E9CE:
-	adds r2, r3, 0
-	adds r2, 0x3E
-	ldrb r1, [r2]
-	movs r0, 0x5
-	negs r0, r0
-	ands r0, r1
-	strb r0, [r2]
-	adds r1, r3, 0
-	adds r1, 0x2A
-	movs r0, 0x2
-	strb r0, [r1]
-	subs r2, 0x12
-	ldrb r1, [r2]
-	subs r0, 0x42
-	ands r0, r1
-	strb r0, [r2]
-	movs r0, 0x99
-	strh r0, [r3, 0x20]
-	movs r0, 0x50
-	strh r0, [r3, 0x22]
-	b _0809E9FE
-_0809E9F8:
-	adds r0, r3, 0
-	bl DestroySprite
-_0809E9FE:
-	pop {r0}
-	bx r0
-	thumb_func_end sub_809E8E8
-
-	thumb_func_start sub_809EA04
-sub_809EA04: @ 809EA04
-	push {lr}
-	adds r3, r0, 0
-	ldr r2, =gTasks
-	movs r0, 0x2E
-	ldrsh r1, [r3, r0]
-	lsls r0, r1, 2
-	adds r0, r1
-	lsls r0, 3
-	adds r0, r2
-	movs r2, 0xC
-	ldrsh r1, [r0, r2]
-	movs r2, 0x30
-	ldrsh r0, [r3, r2]
-	cmp r1, r0
-	beq _0809EAFE
-	strh r1, [r3, 0x30]
-	subs r0, r1, 0x1
-	cmp r0, 0x5
-	bhi _0809EAFE
-	lsls r0, 2
-	ldr r1, =_0809EA3C
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.pool
-	.align 2, 0
-_0809EA3C:
-	.4byte _0809EA54
-	.4byte _0809EA78
-	.4byte _0809EA9C
-	.4byte _0809EAC0
-	.4byte _0809EAEA
-	.4byte _0809EAF8
-_0809EA54:
-	adds r2, r3, 0
-	adds r2, 0x3E
-	ldrb r1, [r2]
-	movs r0, 0x5
-	negs r0, r0
-	ands r0, r1
-	strb r0, [r2]
-	adds r1, r3, 0
-	adds r1, 0x2A
-	movs r0, 0
-	strb r0, [r1]
-	subs r2, 0x12
-	ldrb r1, [r2]
-	subs r0, 0x40
-	ands r0, r1
-	strb r0, [r2]
-	movs r0, 0x35
-	b _0809EAE2
-_0809EA78:
-	adds r2, r3, 0
-	adds r2, 0x3E
-	ldrb r1, [r2]
-	movs r0, 0x5
-	negs r0, r0
-	ands r0, r1
-	strb r0, [r2]
-	adds r1, r3, 0
-	adds r1, 0x2A
-	movs r0, 0
-	strb r0, [r1]
-	subs r2, 0x12
-	ldrb r1, [r2]
-	subs r0, 0x40
-	ands r0, r1
-	strb r0, [r2]
-	movs r0, 0x56
-	b _0809EAE2
-_0809EA9C:
-	adds r2, r3, 0
-	adds r2, 0x3E
-	ldrb r1, [r2]
-	movs r0, 0x5
-	negs r0, r0
-	ands r0, r1
-	strb r0, [r2]
-	adds r1, r3, 0
-	adds r1, 0x2A
-	movs r0, 0
-	strb r0, [r1]
-	subs r2, 0x12
-	ldrb r1, [r2]
-	subs r0, 0x40
-	ands r0, r1
-	strb r0, [r2]
-	movs r0, 0x65
-	b _0809EAE2
-_0809EAC0:
-	adds r2, r3, 0
-	adds r2, 0x3E
-	ldrb r1, [r2]
-	movs r0, 0x5
-	negs r0, r0
-	ands r0, r1
-	strb r0, [r2]
-	adds r1, r3, 0
-	adds r1, 0x2A
-	movs r0, 0
-	strb r0, [r1]
-	subs r2, 0x12
-	ldrb r1, [r2]
-	subs r0, 0x40
-	ands r0, r1
-	strb r0, [r2]
-	movs r0, 0x74
-_0809EAE2:
-	strh r0, [r3, 0x20]
-	movs r0, 0x5C
-	strh r0, [r3, 0x22]
-	b _0809EAFE
-_0809EAEA:
-	adds r0, r3, 0
-	adds r0, 0x3E
-	ldrb r1, [r0]
-	movs r2, 0x4
-	orrs r1, r2
-	strb r1, [r0]
-	b _0809EAFE
-_0809EAF8:
-	adds r0, r3, 0
-	bl DestroySprite
-_0809EAFE:
-	pop {r0}
-	bx r0
-	thumb_func_end sub_809EA04
-
-	thumb_func_start sub_809EB04
-sub_809EB04: @ 809EB04
-	push {r4-r6,lr}
-	mov r6, r8
-	push {r6}
-	adds r5, r0, 0
-	lsls r5, 24
-	lsrs r5, 24
-	ldr r0, =gUnknown_085104C4
-	bl LoadSpritePalette
-	ldr r0, =gSpriteTemplate_85104F0
-	mov r8, r0
-	movs r1, 0x35
-	movs r2, 0x44
-	movs r3, 0
-	bl CreateSpriteAtEnd
-	lsls r0, 24
-	lsrs r1, r0, 24
-	ldr r6, =gSprites
-	lsls r0, r1, 4
-	adds r0, r1
-	lsls r0, 2
-	adds r4, r6, 0
-	adds r4, 0x1C
-	adds r2, r0, r4
-	ldr r1, =sub_809E8E8
-	str r1, [r2]
-	adds r0, r6
-	strh r5, [r0, 0x2E]
-	ldr r1, =0x0000ffff
-	strh r1, [r0, 0x30]
-	mov r0, r8
-	movs r1, 0x35
-	movs r2, 0x44
-	movs r3, 0
-	bl CreateSpriteAtEnd
-	lsls r0, 24
-	lsrs r1, r0, 24
-	lsls r0, r1, 4
-	adds r0, r1
-	lsls r0, 2
-	adds r4, r0, r4
-	ldr r1, =sub_809EA04
-	str r1, [r4]
-	adds r0, r6
-	strh r5, [r0, 0x2E]
-	movs r1, 0x1
-	negs r1, r1
-	strh r1, [r0, 0x30]
-	pop {r3}
-	mov r8, r3
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_809EB04
-
-	thumb_func_start sub_809EB8C
-sub_809EB8C: @ 809EB8C
-	push {lr}
-	ldr r0, =gUnknown_085104C4
-	ldrh r0, [r0, 0x4]
-	bl FreeSpritePaletteByTag
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_809EB8C
-
-	thumb_func_start sub_809EBA0
-sub_809EBA0: @ 809EBA0
-	push {r4,lr}
-	adds r4, r0, 0
-	lsls r4, 24
-	lsrs r4, 24
-	adds r0, r4, 0
-	movs r1, 0
-	bl sub_8198070
-	adds r0, r4, 0
-	bl RemoveWindow
-	movs r0, 0
-	bl schedule_bg_copy_tilemap_to_vram
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_809EBA0
-
-	thumb_func_start sub_809EBC4
-sub_809EBC4: @ 809EBC4
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0x10
-	mov r10, r0
-	adds r0, r1, 0
-	mov r9, r2
-	adds r1, r3, 0
-	ldr r5, [sp, 0x30]
-	ldr r6, [sp, 0x34]
-	ldr r2, [sp, 0x38]
-	mov r8, r2
-	mov r2, r10
-	lsls r2, 24
-	lsrs r2, 24
-	mov r10, r2
-	lsls r3, r0, 24
-	lsrs r3, 24
-	str r3, [sp, 0xC]
-	mov r0, r9
-	lsls r0, 24
-	lsrs r0, 24
-	mov r9, r0
-	lsls r1, 16
-	lsrs r1, 16
-	lsls r5, 24
-	lsrs r5, 24
-	lsls r6, 24
-	lsrs r6, 24
-	mov r2, r8
-	lsls r2, 24
-	lsrs r2, 24
-	mov r8, r2
-	ldr r7, =gStringVar4
-	ldr r4, =gStringVar1
-	adds r0, r4, 0
-	movs r2, 0x1
-	movs r3, 0x4
-	bl ConvertIntToDecimalStringN
-	adds r0, r7, 0
-	adds r1, r4, 0
-	bl StringCopy
-	adds r7, r0, 0
-	ldr r1, =gText_Day
-	bl StringCopy
-	adds r7, r0, 0
-	adds r0, r4, 0
-	adds r1, r5, 0
-	movs r2, 0x1
-	movs r3, 0x3
-	bl ConvertIntToDecimalStringN
-	adds r0, r7, 0
-	adds r1, r4, 0
-	bl StringCopy
-	adds r7, r0, 0
-	ldr r5, =gText_Colon3
-	adds r1, r5, 0
-	bl StringCopy
-	adds r7, r0, 0
-	adds r0, r4, 0
-	adds r1, r6, 0
-	movs r2, 0x2
-	movs r3, 0x2
-	bl ConvertIntToDecimalStringN
-	adds r0, r7, 0
-	adds r1, r4, 0
-	bl StringCopy
-	adds r7, r0, 0
-	adds r1, r5, 0
-	bl StringCopy
-	adds r7, r0, 0
-	adds r0, r4, 0
-	mov r1, r8
-	movs r2, 0x2
-	movs r3, 0x2
-	bl ConvertIntToDecimalStringN
-	adds r0, r7, 0
-	adds r1, r4, 0
-	bl StringCopy
-	ldr r2, =gStringVar4
-	mov r0, r9
-	str r0, [sp]
-	movs r0, 0xFF
-	str r0, [sp, 0x4]
-	movs r0, 0
-	str r0, [sp, 0x8]
-	mov r0, r10
-	movs r1, 0x1
-	ldr r3, [sp, 0xC]
-	bl PrintTextOnWindow
-	add sp, 0x10
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_809EBC4
-
-	thumb_func_start sub_809ECB4
-sub_809ECB4: @ 809ECB4
-	push {r4-r6,lr}
-	mov r6, r9
-	mov r5, r8
-	push {r5,r6}
-	sub sp, 0xC
-	adds r4, r0, 0
-	mov r9, r1
-	adds r5, r2, 0
-	adds r6, r3, 0
-	ldr r0, [sp, 0x24]
-	mov r8, r0
-	lsls r4, 24
-	lsrs r4, 24
-	mov r0, r9
-	lsls r0, 16
-	lsrs r0, 16
-	mov r9, r0
-	lsls r5, 24
-	lsrs r5, 24
-	lsls r6, 24
-	lsrs r6, 24
-	mov r0, r8
-	lsls r0, 24
-	lsrs r0, 24
-	mov r8, r0
-	movs r2, 0x85
-	lsls r2, 2
-	adds r0, r4, 0
-	movs r1, 0
-	movs r3, 0xE
-	bl SetWindowBorderStyle
-	str r5, [sp]
-	str r6, [sp, 0x4]
-	mov r0, r8
-	str r0, [sp, 0x8]
-	adds r0, r4, 0
-	movs r1, 0
-	movs r2, 0x1
-	mov r3, r9
-	bl sub_809EBC4
-	ldr r2, =gText_Confirm2
-	movs r0, 0x1
-	str r0, [sp]
-	movs r0, 0
-	str r0, [sp, 0x4]
-	str r0, [sp, 0x8]
-	adds r0, r4, 0
-	movs r1, 0x1
-	movs r3, 0x7E
-	bl PrintTextOnWindow
-	movs r0, 0
-	bl schedule_bg_copy_tilemap_to_vram
-	add sp, 0xC
-	pop {r3,r4}
-	mov r8, r3
-	mov r9, r4
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_809ECB4
-
-	thumb_func_start sub_809ED38
-sub_809ED38: @ 809ED38
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	adds r5, r1, 0
-	lsls r3, 16
-	lsrs r3, 16
-	adds r1, r3, 0
-	movs r0, 0x80
-	ands r0, r3
-	cmp r0, 0
-	beq _0809ED52
-	ldrh r0, [r4]
-	subs r0, 0x1
-	b _0809ED6C
-_0809ED52:
-	movs r0, 0x40
-	ands r0, r3
-	cmp r0, 0
-	beq _0809ED60
-	ldrh r0, [r4]
-	adds r0, 0x1
-	b _0809ED8A
-_0809ED60:
-	movs r0, 0x20
-	ands r0, r3
-	cmp r0, 0
-	beq _0809ED7A
-	ldrh r0, [r4]
-	subs r0, 0xA
-_0809ED6C:
-	strh r0, [r4]
-	movs r1, 0
-	ldrsh r0, [r4, r1]
-	cmp r0, r5
-	bge _0809ED96
-	strh r2, [r4]
-	b _0809ED96
-_0809ED7A:
-	movs r0, 0x10
-	ands r1, r0
-	cmp r1, 0
-	bne _0809ED86
-	movs r0, 0
-	b _0809ED98
-_0809ED86:
-	ldrh r0, [r4]
-	adds r0, 0xA
-_0809ED8A:
-	strh r0, [r4]
-	movs r1, 0
-	ldrsh r0, [r4, r1]
-	cmp r0, r2
-	ble _0809ED96
-	strh r5, [r4]
-_0809ED96:
-	movs r0, 0x1
-_0809ED98:
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_809ED38
-
-	thumb_func_start sub_809EDA0
-sub_809EDA0: @ 809EDA0
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r2, =gTasks
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 3
-	adds r1, r2
-	movs r0, 0x1
-	strh r0, [r1, 0x8]
-	bx lr
-	.pool
-	thumb_func_end sub_809EDA0
-
-	thumb_func_start sub_809EDB8
-sub_809EDB8: @ 809EDB8
-	push {r4,r5,lr}
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r4, r0, 2
-	adds r4, r0
-	lsls r4, 3
-	ldr r5, =gTasks + 0x8
-	adds r0, r4, r5
-	ldrb r0, [r0, 0x10]
-	bl sub_809EBA0
-	bl sub_809EB8C
-	subs r5, 0x8
-	adds r4, r5
-	ldr r0, =sub_809EDA0
-	str r0, [r4]
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_809EDB8
-
-	thumb_func_start sub_809EDE8
-sub_809EDE8: @ 809EDE8
-	push {r4-r7,lr}
-	mov r7, r8
-	push {r7}
-	sub sp, 0xC
-	lsls r0, 24
-	lsrs r6, r0, 24
-	lsls r0, r6, 2
-	adds r0, r6
-	lsls r7, r0, 3
-	ldr r0, =gTasks + 0x8
-	mov r8, r0
-	adds r5, r7, r0
-	ldrb r4, [r5, 0x4]
-	lsls r0, r4, 1
-	adds r0, r4
-	lsls r0, 2
-	ldr r1, =gUnknown_08510420 - 0x4
-	adds r2, r0, r1
-	ldr r1, =gMain
-	ldrh r3, [r1, 0x2E]
-	movs r0, 0x2
-	ands r0, r3
-	mov r12, r1
-	cmp r0, 0
-	beq _0809EE3C
-	mov r0, r8
-	subs r0, 0x8
-	adds r0, r7, r0
-	ldr r1, =sub_809EDB8
-	str r1, [r0]
-	movs r0, 0
-	strh r0, [r5, 0x2]
-	movs r0, 0x6
-	b _0809EE5C
-	.pool
-_0809EE3C:
-	movs r0, 0x10
-	ands r0, r3
-	cmp r0, 0
-	beq _0809EE4A
-	ldrb r0, [r2, 0x7]
-	cmp r0, 0
-	bne _0809EE5C
-_0809EE4A:
-	mov r3, r12
-	ldrh r1, [r3, 0x2E]
-	movs r0, 0x20
-	ands r0, r1
-	cmp r0, 0
-	beq _0809EE66
-	ldrb r0, [r2, 0x6]
-	cmp r0, 0
-	beq _0809EE66
-_0809EE5C:
-	strh r0, [r5, 0x4]
-	movs r0, 0x5
-	bl PlaySE
-	b _0809EEF4
-_0809EE66:
-	cmp r4, 0x5
-	bne _0809EEB4
-	mov r0, r12
-	ldrh r1, [r0, 0x2E]
-	movs r4, 0x1
-	adds r0, r4, 0
-	ands r0, r1
-	cmp r0, 0
-	beq _0809EEF4
-	ldr r1, =gLocalTime
-	ldrh r0, [r5, 0x6]
-	strh r0, [r1]
-	ldrh r0, [r5, 0x8]
-	strb r0, [r1, 0x2]
-	ldrh r0, [r5, 0xA]
-	strb r0, [r1, 0x3]
-	ldrh r0, [r5, 0xC]
-	strb r0, [r1, 0x4]
-	movs r0, 0x5
-	bl PlaySE
-	ldr r1, =gTasks
-	lsls r0, r6, 2
-	adds r0, r6
-	lsls r0, 3
-	adds r0, r1
-	ldr r1, =sub_809EDB8
-	str r1, [r0]
-	strh r4, [r5, 0x2]
-	movs r0, 0x6
-	strh r0, [r5, 0x4]
-	b _0809EEF4
-	.pool
-_0809EEB4:
-	ldrb r0, [r2]
-	lsls r0, 1
-	adds r0, r5, r0
-	ldrh r1, [r2, 0x2]
-	ldrh r2, [r2, 0x4]
-	mov r3, r12
-	ldrh r4, [r3, 0x30]
-	movs r3, 0xC0
-	ands r3, r4
-	bl sub_809ED38
-	cmp r0, 0
-	beq _0809EEF4
-	movs r0, 0x5
-	bl PlaySE
-	ldrb r0, [r5, 0x10]
-	ldrh r3, [r5, 0x6]
-	ldrb r1, [r5, 0x8]
-	str r1, [sp]
-	ldrb r1, [r5, 0xA]
-	str r1, [sp, 0x4]
-	ldrb r1, [r5, 0xC]
-	str r1, [sp, 0x8]
-	movs r1, 0
-	movs r2, 0x1
-	bl sub_809EBC4
-	ldrb r0, [r5, 0x10]
-	movs r1, 0x2
-	bl CopyWindowToVram
-_0809EEF4:
-	add sp, 0xC
-	pop {r3}
-	mov r8, r3
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_809EDE8
-
-	thumb_func_start sub_809EF00
-sub_809EF00: @ 809EF00
-	push {r4-r6,lr}
-	mov r6, r9
-	mov r5, r8
-	push {r5,r6}
-	sub sp, 0x4
-	mov r8, r0
-	lsls r0, 24
-	lsrs r0, 24
-	mov r8, r0
-	lsls r6, r0, 2
-	add r6, r8
-	lsls r6, 3
-	ldr r0, =gTasks + 0x8
-	mov r9, r0
-	adds r5, r6, r0
-	movs r0, 0
-	strh r0, [r5]
-	ldr r1, =gLocalTime
-	ldrh r0, [r1]
-	strh r0, [r5, 0x6]
-	movs r0, 0x2
-	ldrsb r0, [r1, r0]
-	strh r0, [r5, 0x8]
-	movs r0, 0x3
-	ldrsb r0, [r1, r0]
-	strh r0, [r5, 0xA]
-	movs r0, 0x4
-	ldrsb r0, [r1, r0]
-	strh r0, [r5, 0xC]
-	ldr r0, =gUnknown_08510420
-	bl AddWindow
-	strh r0, [r5, 0x10]
-	lsls r0, 24
-	lsrs r0, 24
-	ldrh r1, [r5, 0x6]
-	ldrb r2, [r5, 0x8]
-	ldrb r3, [r5, 0xA]
-	ldrb r4, [r5, 0xC]
-	str r4, [sp]
-	bl sub_809ECB4
-	mov r0, r8
-	bl sub_809EB04
-	movs r0, 0x2
-	strh r0, [r5, 0x4]
-	movs r0, 0x8
-	negs r0, r0
-	add r9, r0
-	add r6, r9
-	ldr r0, =sub_809EDE8
-	str r0, [r6]
-	add sp, 0x4
-	pop {r3,r4}
-	mov r8, r3
-	mov r9, r4
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_809EF00
-
-	thumb_func_start sub_809EF88
-sub_809EF88: @ 809EF88
-	push {r4-r7,lr}
-	sub sp, 0x4
-	movs r0, 0
-	movs r1, 0
-	bl SetGpuReg
-	movs r0, 0
-	bl SetVBlankCallback
-	movs r2, 0xA0
-	lsls r2, 19
-	mov r1, sp
-	movs r0, 0
-	strh r0, [r1]
-	ldr r1, =0x040000d4
-	mov r0, sp
-	str r0, [r1]
-	str r2, [r1, 0x4]
-	ldr r0, =0x81000200
-	str r0, [r1, 0x8]
-	ldr r0, [r1, 0x8]
-	movs r2, 0xC0
-	lsls r2, 19
-	movs r3, 0xC0
-	lsls r3, 9
-	mov r4, sp
-	movs r6, 0
-	movs r5, 0x80
-	lsls r5, 5
-	ldr r7, =0x81000800
-	movs r0, 0x81
-	lsls r0, 24
-	mov r12, r0
-_0809EFCA:
-	strh r6, [r4]
-	mov r0, sp
-	str r0, [r1]
-	str r2, [r1, 0x4]
-	str r7, [r1, 0x8]
-	ldr r0, [r1, 0x8]
-	adds r2, r5
-	subs r3, r5
-	cmp r3, r5
-	bhi _0809EFCA
-	strh r6, [r4]
-	mov r0, sp
-	str r0, [r1]
-	str r2, [r1, 0x4]
-	lsrs r0, r3, 1
-	mov r2, r12
-	orrs r0, r2
-	str r0, [r1, 0x8]
-	ldr r0, [r1, 0x8]
-	movs r0, 0
-	movs r1, 0x80
-	bl ResetOamRange
-	bl LoadOam
-	bl ScanlineEffect_Stop
-	bl ScanlineEffect_Clear
-	bl ResetSpriteData
-	bl ResetTasks
-	bl ResetPaletteFade
-	bl sub_809F048
-	ldr r0, =sub_809F0AC
-	bl SetVBlankCallback
-	ldr r0, =sub_809F090
-	bl SetMainCallback2
-	ldr r0, =sub_809F200
-	movs r1, 0x50
-	bl CreateTask
-	add sp, 0x4
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_809EF88
-
-	thumb_func_start sub_809F048
-sub_809F048: @ 809F048
-	push {lr}
-	bl clear_scheduled_bg_copies_to_vram
-	movs r0, 0
-	bl ResetBgsAndClearDma3BusyFlags
-	ldr r1, =gUnknown_08510404
-	movs r0, 0
-	movs r2, 0x1
-	bl InitBgsFromTemplates
-	movs r0, 0
-	bl schedule_bg_copy_tilemap_to_vram
-	movs r1, 0x82
-	lsls r1, 5
-	movs r0, 0
-	bl SetGpuReg
-	movs r0, 0
-	bl ShowBg
-	ldr r0, =gUnknown_08510408
-	bl InitWindows
-	bl DeactivateAllTextPrinters
-	bl sub_81973A4
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_809F048
-
-	thumb_func_start sub_809F090
-sub_809F090: @ 809F090
-	push {lr}
-	bl RunTasks
-	bl AnimateSprites
-	bl BuildOamBuffer
-	bl do_scheduled_bg_tilemap_copies_to_vram
-	bl UpdatePaletteFade
-	pop {r0}
-	bx r0
-	thumb_func_end sub_809F090
-
-	thumb_func_start sub_809F0AC
-sub_809F0AC: @ 809F0AC
-	push {lr}
-	bl ProcessSpriteCopyRequests
-	bl LoadOam
-	bl TransferPlttBuffer
-	pop {r0}
-	bx r0
-	thumb_func_end sub_809F0AC
-
-	thumb_func_start sub_809F0C0
-sub_809F0C0: @ 809F0C0
-	push {r4,lr}
-	sub sp, 0xC
-	adds r4, r0, 0
-	movs r2, 0x80
-	lsls r2, 2
-	movs r0, 0x1
-	movs r1, 0
-	movs r3, 0xF
-	bl sub_8197B1C
-	movs r0, 0x1
-	str r0, [sp]
-	movs r0, 0
-	str r0, [sp, 0x4]
-	str r0, [sp, 0x8]
-	movs r0, 0x1
-	movs r1, 0x1
-	adds r2, r4, 0
-	movs r3, 0
-	bl PrintTextOnWindow
-	movs r0, 0
-	bl schedule_bg_copy_tilemap_to_vram
-	add sp, 0xC
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_809F0C0
-
-	thumb_func_start sub_809F0F8
-sub_809F0F8: @ 809F0F8
-	push {r4-r7,lr}
-	sub sp, 0xC
-	lsls r0, 24
-	lsrs r7, r0, 24
-	lsls r0, r7, 2
-	adds r0, r7
-	lsls r0, 3
-	ldr r1, =gTasks + 0x8
-	adds r6, r0, r1
-	movs r0, 0
-	ldrsh r5, [r6, r0]
-	cmp r5, 0
-	beq _0809F11C
-	cmp r5, 0x1
-	beq _0809F1B2
-	b _0809F1F8
-	.pool
-_0809F11C:
-	movs r2, 0x85
-	lsls r2, 2
-	movs r0, 0
-	movs r1, 0
-	movs r3, 0xE
-	bl SetWindowBorderStyle
-	ldr r2, =gText_PresentTime
-	movs r0, 0x1
-	str r0, [sp]
-	movs r4, 0xFF
-	str r4, [sp, 0x4]
-	str r5, [sp, 0x8]
-	movs r0, 0
-	movs r1, 0x1
-	movs r3, 0
-	bl PrintTextOnWindow
-	ldr r1, =gLocalTime
-	ldrh r3, [r1]
-	ldrb r0, [r1, 0x2]
-	str r0, [sp]
-	ldrb r0, [r1, 0x3]
-	str r0, [sp, 0x4]
-	ldrb r0, [r1, 0x4]
-	str r0, [sp, 0x8]
-	movs r0, 0
-	movs r1, 0
-	movs r2, 0x11
-	bl sub_809EBC4
-	ldr r2, =gText_PreviousTime
-	movs r0, 0x21
-	str r0, [sp]
-	str r4, [sp, 0x4]
-	str r5, [sp, 0x8]
-	movs r0, 0
-	movs r1, 0x1
-	movs r3, 0
-	bl PrintTextOnWindow
-	ldr r0, =gSaveBlock2Ptr
-	ldr r1, [r0]
-	adds r0, r1, 0
-	adds r0, 0xA0
-	ldrh r3, [r0]
-	adds r0, 0x2
-	ldrb r0, [r0]
-	str r0, [sp]
-	adds r0, r1, 0
-	adds r0, 0xA3
-	ldrb r0, [r0]
-	str r0, [sp, 0x4]
-	adds r0, r1, 0
-	adds r0, 0xA4
-	ldrb r0, [r0]
-	str r0, [sp, 0x8]
-	movs r0, 0
-	movs r1, 0
-	movs r2, 0x31
-	bl sub_809EBC4
-	ldr r0, =gText_ResetRTCConfirmCancel
-	bl sub_809F0C0
-	movs r0, 0
-	movs r1, 0x2
-	bl CopyWindowToVram
-	movs r0, 0
-	bl schedule_bg_copy_tilemap_to_vram
-	ldrh r0, [r6]
-	adds r0, 0x1
-	strh r0, [r6]
-_0809F1B2:
-	ldr r0, =gMain
-	ldrh r1, [r0, 0x2E]
-	movs r0, 0x2
-	ands r0, r1
-	cmp r0, 0
-	beq _0809F1E4
-	adds r0, r7, 0
-	bl DestroyTask
-	bl DoSoftReset
-	b _0809F1F8
-	.pool
-_0809F1E4:
-	movs r0, 0x1
-	ands r0, r1
-	cmp r0, 0
-	beq _0809F1F8
-	movs r0, 0x5
-	bl PlaySE
-	adds r0, r7, 0
-	bl DestroyTask
-_0809F1F8:
-	add sp, 0xC
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_809F0F8
-
-	thumb_func_start sub_809F200
-sub_809F200: @ 809F200
-	push {r4,r5,lr}
-	sub sp, 0x4
-	lsls r0, 24
-	lsrs r4, r0, 24
-	lsls r0, r4, 2
-	adds r0, r4
-	lsls r0, 3
-	ldr r1, =gTasks + 0x8
-	adds r5, r0, r1
-	movs r1, 0
-	ldrsh r0, [r5, r1]
-	cmp r0, 0x6
-	bls _0809F21C
-	b _0809F404
-_0809F21C:
-	lsls r0, 2
-	ldr r1, =_0809F230
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.pool
-	.align 2, 0
-_0809F230:
-	.4byte _0809F24C
-	.4byte _0809F268
-	.4byte _0809F2B4
-	.4byte _0809F310
-	.4byte _0809F398
-	.4byte _0809F3C8
-	.4byte _0809F3EA
-_0809F24C:
-	movs r0, 0x1
-	negs r0, r0
-	ldr r1, =0x0000ffff
-	str r1, [sp]
-	movs r1, 0x1
-	movs r2, 0x10
-	movs r3, 0
-	bl BeginNormalPaletteFade
-	movs r0, 0x1
-	strh r0, [r5]
-	b _0809F404
-	.pool
-_0809F268:
-	ldr r0, =gPaletteFade
-	ldrb r1, [r0, 0x7]
-	movs r0, 0x80
-	ands r0, r1
-	cmp r0, 0
-	beq _0809F276
-	b _0809F404
-_0809F276:
-	ldr r0, =gSaveFileStatus
-	ldrh r0, [r0]
-	cmp r0, 0
-	beq _0809F282
-	cmp r0, 0x2
-	bne _0809F29C
-_0809F282:
-	ldr r0, =gText_NoSaveFileCantSetTime
-	bl sub_809F0C0
-	movs r0, 0x5
-	strh r0, [r5]
-	b _0809F404
-	.pool
-_0809F29C:
-	bl RtcCalcLocalTime
-	ldr r0, =sub_809F0F8
-	movs r1, 0x50
-	bl CreateTask
-	lsls r0, 24
-	lsrs r0, 24
-	strh r0, [r5, 0x2]
-	b _0809F334
-	.pool
-_0809F2B4:
-	ldr r2, =gTasks
-	movs r0, 0x2
-	ldrsh r1, [r5, r0]
-	lsls r0, r1, 2
-	adds r0, r1
-	lsls r0, 3
-	adds r0, r2
-	ldrb r0, [r0, 0x4]
-	cmp r0, 0x1
-	bne _0809F2CA
-	b _0809F404
-_0809F2CA:
-	movs r0, 0
-	movs r1, 0
-	bl sub_8198070
-	ldr r0, =gText_PleaseResetTime
-	bl sub_809F0C0
-	ldr r2, =gLocalTime
-	ldr r0, =gSaveBlock2Ptr
-	ldr r0, [r0]
-	adds r0, 0xA0
-	ldr r1, [r0, 0x4]
-	ldr r0, [r0]
-	str r0, [r2]
-	str r1, [r2, 0x4]
-	ldr r0, =sub_809EF00
-	movs r1, 0x50
-	bl CreateTask
-	lsls r0, 24
-	lsrs r0, 24
-	strh r0, [r5, 0x2]
-	movs r0, 0x3
-	strh r0, [r5]
-	b _0809F404
-	.pool
-_0809F310:
-	ldr r2, =gTasks
-	movs r0, 0x2
-	ldrsh r1, [r5, r0]
-	lsls r0, r1, 2
-	adds r0, r1
-	lsls r0, 3
-	adds r1, r0, r2
-	movs r2, 0x8
-	ldrsh r0, [r1, r2]
-	cmp r0, 0
-	beq _0809F404
-	movs r2, 0xA
-	ldrsh r0, [r1, r2]
-	cmp r0, 0
-	bne _0809F340
-	ldrb r0, [r5, 0x2]
-	bl DestroyTask
-_0809F334:
-	movs r0, 0x2
-	strh r0, [r5]
-	b _0809F404
-	.pool
-_0809F340:
-	ldrb r0, [r5, 0x2]
-	bl DestroyTask
-	bl RtcReset
-	ldr r4, =gLocalTime
-	movs r1, 0
-	ldrsh r0, [r4, r1]
-	movs r1, 0x2
-	ldrsb r1, [r4, r1]
-	movs r2, 0x3
-	ldrsb r2, [r4, r2]
-	movs r3, 0x4
-	ldrsb r3, [r4, r3]
-	bl RtcCalcLocalTimeOffset
-	ldr r0, =gSaveBlock2Ptr
-	ldr r2, [r0]
-	adds r2, 0xA0
-	ldr r0, [r4]
-	ldr r1, [r4, 0x4]
-	str r0, [r2]
-	str r1, [r2, 0x4]
-	ldr r0, =0x00004040
-	ldrh r1, [r4]
-	bl VarSet
-	bl DisableResetRTC
-	ldr r0, =gText_ClockHasBeenReset
-	bl sub_809F0C0
-	movs r0, 0x4
-	strh r0, [r5]
-	b _0809F404
-	.pool
-_0809F398:
-	movs r0, 0
-	bl TrySavingData
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	bne _0809F3B8
-	ldr r0, =gText_SaveCompleted
-	bl sub_809F0C0
-	movs r0, 0x49
-	bl PlaySE
-	b _0809F3C4
-	.pool
-_0809F3B8:
-	ldr r0, =gText_SaveFailed
-	bl sub_809F0C0
-	movs r0, 0x16
-	bl PlaySE
-_0809F3C4:
-	movs r0, 0x5
-	strh r0, [r5]
-_0809F3C8:
-	ldr r0, =gMain
-	ldrh r1, [r0, 0x2E]
-	movs r0, 0x1
-	ands r0, r1
-	cmp r0, 0
-	beq _0809F404
-	movs r0, 0x1
-	negs r0, r0
-	ldr r1, =0x0000ffff
-	str r1, [sp]
-	movs r1, 0x1
-	movs r2, 0
-	movs r3, 0x10
-	bl BeginNormalPaletteFade
-	movs r0, 0x6
-	strh r0, [r5]
-_0809F3EA:
-	ldr r0, =gPaletteFade
-	ldrb r1, [r0, 0x7]
-	movs r0, 0x80
-	ands r0, r1
-	cmp r0, 0
-	bne _0809F404
-	adds r0, r4, 0
-	bl DestroyTask
-	bl FreeAllWindowBuffers
-	bl DoSoftReset
-_0809F404:
-	add sp, 0x4
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_809F200
-
-	thumb_func_start sub_809F41C
-sub_809F41C: @ 809F41C
-	push {lr}
-	ldr r0, =0x00000861
-	bl FlagSet
-	movs r0, 0x86
-	lsls r0, 4
-	bl FlagSet
-	ldr r0, =0x00000862
-	bl FlagSet
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_809F41C
-
-	.align 2, 0 @ Don't pad with nop.
diff --git a/asm/title_screen.s b/asm/title_screen.s
index 32594424a..9a494c321 100644
--- a/asm/title_screen.s
+++ b/asm/title_screen.s
@@ -1243,7 +1243,7 @@ c2_reset_rtc_screen_1: @ 80AAF0C
 	lsls r0, 24
 	cmp r0, 0
 	bne _080AAF1E
-	ldr r0, =sub_809EF88
+	ldr r0, =CB2_InitResetRtcScreen
 	bl SetMainCallback2
 _080AAF1E:
 	pop {r0}
diff --git a/data/reset_rtc_screen.s b/data/reset_rtc_screen.s
deleted file mode 100644
index 6d3964da8..000000000
--- a/data/reset_rtc_screen.s
+++ /dev/null
@@ -1,78 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.section .rodata
-	.align 2, 0
-
-gUnknown_08510404:: @ 8510404 struct BgTemplate
-	.4byte 0x000001f0
-
-	.align 2
-gUnknown_08510408:: @ 8510408
-	window_template 0x00, 0x01, 0x01, 0x13, 0x09, 0x0f, 0x0155
-	window_template 0x00, 0x02, 0x0f, 0x1b, 0x04, 0x0f, 0x00e9
-	null_window_template
-
-	.align 2
-gUnknown_08510420:: @ 8510420
-	window_template 0x00, 0x04, 0x09, 0x15, 0x02, 0x0f, 0x00bf
-
-	.align 2
-gUnknown_08510428:: @ 8510428
-	.byte   3,  0,  1,  0, 15, 39,  0,  2,  0,  0,  0,  0
-	.byte   4,  0,  0,  0, 23,  0,  1,  3,  0,  0,  0,  0
-	.byte   5,  0,  0,  0, 59,  0,  2,  4,  0,  0,  0,  0
-	.byte   6,  0,  0,  0, 59,  0,  3,  5,  0,  0,  0,  0
-	.byte   7,  0,  0,  0,  0,  0,  4,  0,  6,  0,  0,  0
-
-	.align 2
-gOamData_08510464:: @ 8510464
-	.2byte 0x0000
-	.2byte 0x0000
-	.2byte 0x0000
-
-	.align 2
-gResetRtcScreen_DownArrowGfx:: @ 851046C
-	.incbin "graphics/misc/reset_rtc_screen_downarrow.4bpp"
-
-	.align 2
-gResetRtcScreen_RightArrowGfx:: @ 851048C
-	.incbin "graphics/misc/reset_rtc_screen_rightarrow.4bpp"
-
-	.align 2
-gResetRtcScreen_ArrowPal: @ 85104AC
-	.incbin "graphics/misc/reset_rtc_screen_arrow.gbapal"
-
-	.align 2
-gSpriteImageTable_85104B4:: @ 85104B4
-	obj_frame_tiles gResetRtcScreen_DownArrowGfx, 0x20
-	obj_frame_tiles gResetRtcScreen_RightArrowGfx, 0x20
-
-	.align 2
-gUnknown_085104C4:: @ 85104C4
-	obj_pal gResetRtcScreen_ArrowPal, 0x1000
-
-	.align 2
-gSpriteAnim_85104CC:: @ 85104CC
-	obj_image_anim_frame 0, 30
-	obj_image_anim_jump 0
-
-	.align 2
-gSpriteAnim_85104D4: @ 85104D4
-	obj_image_anim_frame 0, 30, OBJ_IMAGE_ANIM_V_FLIP
-	obj_image_anim_jump 0
-
-	.align 2
-gSpriteAnim_85104DC:: @ 85104DC
-	obj_image_anim_frame 1, 30
-	obj_image_anim_jump 0
-
-	.align 2
-gSpriteAnimTable_85104E4:: @ 85104E4
-	.4byte gSpriteAnim_85104CC
-	.4byte gSpriteAnim_85104D4
-	.4byte gSpriteAnim_85104DC
-
-	.align 2
-gSpriteTemplate_85104F0:: @ 85104F0
-	spr_template 0xFFFF, 0x1000, gOamData_08510464, gSpriteAnimTable_85104E4, gSpriteImageTable_85104B4, gDummySpriteAffineAnimTable, SpriteCallbackDummy
diff --git a/include/reset_rtc_screen.h b/include/reset_rtc_screen.h
new file mode 100644
index 000000000..5807dec99
--- /dev/null
+++ b/include/reset_rtc_screen.h
@@ -0,0 +1,6 @@
+#ifndef GUARD_RESET_RTC_SCREEN_H
+#define GUARD_RESET_RTC_SCREEN_H
+
+void CB2_InitResetRtcScreen(void);
+
+#endif // GUARD_RESET_RTC_SCREEN_H
diff --git a/include/strings.h b/include/strings.h
index 9c998ca51..a8ea7ee46 100644
--- a/include/strings.h
+++ b/include/strings.h
@@ -152,6 +152,19 @@ extern const u8 gText_EggNickname[];
 extern const u8 gText_Pokemon[];
 extern const u8 gText_InGameClockUsable[];
 
+// reset rtc screen texts
+extern const u8 gText_Day[];
+extern const u8 gText_Colon3[];
+extern const u8 gText_Confirm2[];
+extern const u8 gText_PresentTime[];
+extern const u8 gText_PreviousTime[];
+extern const u8 gText_ResetRTCConfirmCancel[];
+extern const u8 gText_NoSaveFileCantSetTime[];
+extern const u8 gText_PleaseResetTime[];
+extern const u8 gText_ClockHasBeenReset[];
+extern const u8 gText_SaveCompleted[];
+extern const u8 gText_SaveFailed[];
+
 // menu texts
 extern const u8 gText_MenuPokedex[];
 extern const u8 gText_MenuPokemon[];
diff --git a/ld_script.txt b/ld_script.txt
index fc89a4613..c1603584e 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -108,7 +108,7 @@ SECTIONS {
         src/coord_event_weather.o(.text);
         asm/field_tasks.o(.text);
         src/clock.o(.text);
-        asm/reset_rtc_screen.o(.text);
+        src/reset_rtc_screen.o(.text);
         src/start_menu.o(.text);
         asm/start_menu.o(.text);
         src/tileset_anims.o(.text);
@@ -408,7 +408,7 @@ SECTIONS {
         src/scrcmd.o(.rodata);
         src/coord_event_weather.o(.rodata);
         data/field_tasks.o(.rodata);
-        data/reset_rtc_screen.o(.rodata);
+        src/reset_rtc_screen.o(.rodata);
         src/start_menu.o(.rodata);
         src/tileset_anims.o(.rodata);
         src/palette.o(.rodata);
diff --git a/src/reset_rtc_screen.c b/src/reset_rtc_screen.c
new file mode 100644
index 000000000..75d994162
--- /dev/null
+++ b/src/reset_rtc_screen.c
@@ -0,0 +1,640 @@
+#include "global.h"
+#include "reset_rtc_screen.h"
+#include "event_data.h"
+#include "main.h"
+#include "menu.h"
+#include "palette.h"
+#include "rtc.h"
+#include "save.h"
+#include "sprite.h"
+#include "constants/songs.h"
+#include "sound.h"
+#include "string_util.h"
+#include "strings.h"
+#include "task.h"
+#include "text.h"
+#include "scanline_effect.h"
+#include "bg.h"
+#include "window.h"
+#include "gpu_regs.h"
+#include "new_menu_helpers.h"
+
+struct ResetRtcStruct
+{
+    /*0x0*/ u8 dataIndex;
+    /*0x2*/ u16 minVal;
+    /*0x4*/ u16 maxVal;
+    /*0x6*/ u8 left;
+    /*0x7*/ u8 right;
+    /*0x8*/ u8 unk8;
+};
+
+// this file's functions
+static void CB2_ResetRtcScreen(void);
+static void VBlankCB(void);
+static void Task_ResetRtcScreen(u8 taskId);
+static void sub_809F048(void);
+
+// const rom data
+static const struct BgTemplate sBackgroundTemplates[] =
+{
+    {
+        .bg = 0,
+        .charBaseIndex = 0,
+        .mapBaseIndex = 31,
+        .screenSize = 0,
+        .paletteMode = 0,
+        .priority = 0,
+        .baseTile = 0
+    }
+};
+
+static const struct WindowTemplate sUnknown_08510408[] =
+{
+    {0x00, 0x01, 0x01, 0x13, 0x09, 0x0f, 0x0155},
+    {0x00, 0x02, 0x0f, 0x1b, 0x04, 0x0f, 0x00e9},
+    DUMMY_WIN_TEMPLATE
+};
+
+static const struct WindowTemplate sUnknown_08510420 = {0x00, 0x04, 0x09, 0x15, 0x02, 0x0f, 0x00bf};
+
+static const struct ResetRtcStruct sUnknown_08510428[5] =
+{
+    {
+        .dataIndex = 3,
+        .minVal = 1,
+        .maxVal = 9999,
+        .left = 0,
+        .right = 2,
+        .unk8 = 0,
+    },
+    {
+        .dataIndex = 4,
+        .minVal = 0,
+        .maxVal = 23,
+        .left = 1,
+        .right = 3,
+        .unk8 = 0,
+    },
+    {
+        .dataIndex = 5,
+        .minVal = 0,
+        .maxVal = 59,
+        .left = 2,
+        .right = 4,
+        .unk8 = 0,
+    },
+    {
+        .dataIndex = 6,
+        .minVal = 0,
+        .maxVal = 59,
+        .left = 3,
+        .right = 5,
+        .unk8 = 0,
+    },
+    {
+        .dataIndex = 7,
+        .minVal = 0,
+        .maxVal = 0,
+        .left = 4,
+        .right = 0,
+        .unk8 = 6,
+    },
+};
+
+static const struct OamData sOamData_08510464 =
+{
+    .y = 0,
+    .affineMode = 0,
+    .objMode = 0,
+    .mosaic = 0,
+    .bpp = 0,
+    .shape = 0,
+    .x = 0,
+    .matrixNum = 0,
+    .size = 0,
+    .tileNum = 0,
+    .priority = 0,
+    .paletteNum = 0,
+    .affineParam = 0,
+};
+
+static const u8 sResetRtcScreen_DownArrowGfx[] = INCBIN_U8("graphics/misc/reset_rtc_screen_downarrow.4bpp");
+static const u8 sResetRtcScreen_RightArrowGfx[] = INCBIN_U8("graphics/misc/reset_rtc_screen_rightarrow.4bpp");
+static const u16 sResetRtcScreen_ArrowPal[] = INCBIN_U16("graphics/misc/reset_rtc_screen_arrow.gbapal");
+
+static const struct SpriteFrameImage sSpriteImageTable_85104B4[] =
+{
+    obj_frame_tiles(sResetRtcScreen_DownArrowGfx),
+    obj_frame_tiles(sResetRtcScreen_RightArrowGfx)
+};
+
+static const struct SpritePalette sSpritePalette_Arrow =
+{
+    sResetRtcScreen_ArrowPal, 0x1000
+};
+
+static const union AnimCmd sSpriteAnim_85104CC[] =
+{
+    ANIMCMD_FRAME(0, 30),
+    ANIMCMD_JUMP(0),
+};
+
+static const union AnimCmd sSpriteAnim_85104D4[] =
+{
+    ANIMCMD_FRAME(0, 158, .vFlip = TRUE),
+    ANIMCMD_JUMP(0),
+};
+
+static const union AnimCmd sSpriteAnim_85104DC[] =
+{
+    ANIMCMD_FRAME(1, 30),
+    ANIMCMD_JUMP(0),
+};
+
+static const union AnimCmd *const sSpriteAnimTable_85104E4[] =
+{
+    sSpriteAnim_85104CC,
+    sSpriteAnim_85104D4,
+    sSpriteAnim_85104DC,
+};
+
+static const struct SpriteTemplate sSpriteTemplate_85104F0 =
+{
+    .tileTag = 0xFFFF,
+    .paletteTag = 0x1000,
+    .oam = &sOamData_08510464,
+    .anims = sSpriteAnimTable_85104E4,
+    .images = sSpriteImageTable_85104B4,
+    .affineAnims = gDummySpriteAffineAnimTable,
+    .callback = SpriteCallbackDummy,
+};
+
+// code
+static void SpriteCB_ResetRtcCursor0(struct Sprite *sprite)
+{
+    int state = gTasks[sprite->data[0]].data[2];
+    if (state != sprite->data[1])
+    {
+        sprite->data[1] = state;
+        switch (state)
+        {
+        case 1:
+            sprite->invisible = FALSE;
+            sprite->animNum = 1;
+            sprite->animDelayCounter = 0;
+            sprite->pos1.x = 53;
+            sprite->pos1.y = 68;
+            break;
+        case 2:
+            sprite->invisible = FALSE;
+            sprite->animNum = 1;
+            sprite->animDelayCounter = 0;
+            sprite->pos1.x = 86;
+            sprite->pos1.y = 68;
+            break;
+        case 3:
+            sprite->invisible = FALSE;
+            sprite->animNum = 1;
+            sprite->animDelayCounter = 0;
+            sprite->pos1.x = 101;
+            sprite->pos1.y = 68;
+            break;
+        case 4:
+            sprite->invisible = FALSE;
+            sprite->animNum = 1;
+            sprite->animDelayCounter = 0;
+            sprite->pos1.x = 116;
+            sprite->pos1.y = 68;
+            break;
+        case 5:
+            sprite->invisible = FALSE;
+            sprite->animNum = 2;
+            sprite->animDelayCounter = 0;
+            sprite->pos1.x = 153;
+            sprite->pos1.y = 80;
+            break;
+        case 6:
+            DestroySprite(sprite);
+            break;
+        }
+    }
+}
+
+static void SpriteCB_ResetRtcCursor1(struct Sprite *sprite)
+{
+    int state = gTasks[sprite->data[0]].data[2];
+    if (state != sprite->data[1])
+    {
+        sprite->data[1] = state;
+        switch (state)
+        {
+        case 1:
+            sprite->invisible = FALSE;
+            sprite->animNum = 0;
+            sprite->animDelayCounter = 0;
+            sprite->pos1.x = 53;
+            sprite->pos1.y = 92;
+            break;
+        case 2:
+            sprite->invisible = FALSE;
+            sprite->animNum = 0;
+            sprite->animDelayCounter = 0;
+            sprite->pos1.x = 86;
+            sprite->pos1.y = 92;
+            break;
+        case 3:
+            sprite->invisible = FALSE;
+            sprite->animNum = 0;
+            sprite->animDelayCounter = 0;
+            sprite->pos1.x = 101;
+            sprite->pos1.y = 92;
+            break;
+        case 4:
+            sprite->invisible = FALSE;
+            sprite->animNum = 0;
+            sprite->animDelayCounter = 0;
+            sprite->pos1.x = 116;
+            sprite->pos1.y = 92;
+            break;
+        case 5:
+            sprite->invisible = TRUE;
+            break;
+        case 6:
+            DestroySprite(sprite);
+            break;
+        }
+    }
+}
+
+static void CreateCursor(u8 taskId)
+{
+    u32 spriteId;
+
+    LoadSpritePalette(&sSpritePalette_Arrow);
+
+    spriteId = CreateSpriteAtEnd(&sSpriteTemplate_85104F0, 53, 68, 0);
+    gSprites[spriteId].callback = SpriteCB_ResetRtcCursor0;
+    gSprites[spriteId].data[0] = taskId;
+    gSprites[spriteId].data[1] = -1;
+
+    spriteId = CreateSpriteAtEnd(&sSpriteTemplate_85104F0, 53, 68, 0);
+    gSprites[spriteId].callback = SpriteCB_ResetRtcCursor1;
+    gSprites[spriteId].data[0] = taskId;
+    gSprites[spriteId].data[1] = -1;
+}
+
+static void FreeCursorPalette(void)
+{
+    FreeSpritePaletteByTag(sSpritePalette_Arrow.tag);
+}
+
+static void HideChooseTimeWindow(u8 windowId)
+{
+    sub_8198070(windowId, FALSE);
+    RemoveWindow(windowId);
+    schedule_bg_copy_tilemap_to_vram(0);
+}
+
+static void PrintTime(u8 windowId, u8 x, u8 y, u16 days, u8 hours, u8 minutes, u8 seconds)
+{
+    u8 *dest = gStringVar4;
+
+    ConvertIntToDecimalStringN(gStringVar1, days, 1, 4);
+    dest = StringCopy(dest, gStringVar1);
+    dest = StringCopy(dest, gText_Day);
+
+    ConvertIntToDecimalStringN(gStringVar1, hours, 1, 3);
+    dest = StringCopy(dest, gStringVar1);
+    dest = StringCopy(dest, gText_Colon3);
+
+    ConvertIntToDecimalStringN(gStringVar1, minutes, 2, 2);
+    dest = StringCopy(dest, gStringVar1);
+    dest = StringCopy(dest, gText_Colon3);
+
+    ConvertIntToDecimalStringN(gStringVar1, seconds, 2, 2);
+    dest = StringCopy(dest, gStringVar1);
+
+    PrintTextOnWindow(windowId, 1, gStringVar4, x, y, TEXT_SPEED_FF, NULL);
+}
+
+static void ShowChooseTimeWindow(u8 windowId, u16 days, u8 hours, u8 minutes, u8 seconds)
+{
+    SetWindowBorderStyle(windowId, FALSE, 0x214, 0xE);
+    PrintTime(windowId, 0, 1, days, hours, minutes, seconds);
+    PrintTextOnWindow(windowId, 1, gText_Confirm2, 126, 1, 0, NULL);
+    schedule_bg_copy_tilemap_to_vram(0);
+}
+
+static bool32 MoveTimeUpDown(s16 *val, int minVal, int maxVal, u16 keys)
+{
+    if (keys & DPAD_DOWN)
+    {
+        *val -= 1;
+        if (*val < minVal)
+            *val = maxVal;
+    }
+    else if (keys & DPAD_UP)
+    {
+        *val += 1;
+        if (*val > maxVal)
+            *val = minVal;
+    }
+    else if (keys & DPAD_LEFT)
+    {
+        *val -= 10;
+        if (*val < minVal)
+            *val = maxVal;
+    }
+    else if (keys & DPAD_RIGHT)
+    {
+        *val += 10;
+        if (*val > maxVal)
+            *val = minVal;
+    }
+    else
+    {
+        return FALSE;
+    }
+
+    return TRUE;
+}
+
+static void Task_ResetRtc_3(u8 taskId)
+{
+    gTasks[taskId].data[0] = 1;
+}
+
+static void Task_ResetRtc_2(u8 taskId)
+{
+    s16 *data = gTasks[taskId].data;
+
+    HideChooseTimeWindow(data[8]);
+    FreeCursorPalette();
+    gTasks[taskId].func = Task_ResetRtc_3;
+}
+
+static void Task_ResetRtc_1(u8 taskId)
+{
+    s16 *data = gTasks[taskId].data;
+    u8 selection = data[2];
+    const struct ResetRtcStruct *selectionInfo = &sUnknown_08510428[selection - 1];
+
+    if (gMain.newKeys & B_BUTTON)
+    {
+        gTasks[taskId].func = Task_ResetRtc_2;
+        data[1] = 0;
+        data[2] = 6;
+        PlaySE(SE_SELECT);
+        return;
+    }
+
+    if (gMain.newKeys & DPAD_RIGHT)
+    {
+        if (selectionInfo->right)
+        {
+            data[2] = selectionInfo->right;
+            PlaySE(SE_SELECT);
+            return;
+        }
+    }
+
+    if (gMain.newKeys & DPAD_LEFT)
+    {
+        if (selectionInfo->left)
+        {
+            data[2] = selectionInfo->left;
+            PlaySE(SE_SELECT);
+            return;
+        }
+    }
+
+    if (selection == 5)
+    {
+        if (gMain.newKeys & A_BUTTON)
+        {
+            gLocalTime.days = data[3];
+            gLocalTime.hours = data[4];
+            gLocalTime.minutes = data[5];
+            gLocalTime.seconds = data[6];
+            PlaySE(SE_SELECT);
+            gTasks[taskId].func = Task_ResetRtc_2;
+            data[1] = 1;
+            data[2] = 6;
+        }
+    }
+    else if (MoveTimeUpDown(&data[selectionInfo->dataIndex], selectionInfo->minVal, selectionInfo->maxVal, gMain.newAndRepeatedKeys & (DPAD_UP | DPAD_DOWN)))
+    {
+        PlaySE(SE_SELECT);
+        PrintTime(data[8], 0, 1, data[3], data[4], data[5], data[6]);
+        CopyWindowToVram(data[8], 2);
+    }
+}
+
+static void Task_ResetRtc_0(u8 taskId)
+{
+    s16 *data = gTasks[taskId].data;
+    data[0] = 0;
+    data[3] = gLocalTime.days;
+    data[4] = gLocalTime.hours;
+    data[5] = gLocalTime.minutes;
+    data[6] = gLocalTime.seconds;
+    data[8] = AddWindow(&sUnknown_08510420);
+    ShowChooseTimeWindow(data[8], data[3], data[4], data[5], data[6]);
+    CreateCursor(taskId);
+    data[2] = 2;
+    gTasks[taskId].func = Task_ResetRtc_1;
+}
+
+void CB2_InitResetRtcScreen(void)
+{
+    SetGpuReg(REG_OFFSET_DISPCNT, 0);
+    SetVBlankCallback(NULL);
+    DmaClear16(3, PLTT, PLTT_SIZE);
+    DmaFillLarge16(3, 0, (u8 *)VRAM, 0x18000, 0x1000);
+    ResetOamRange(0, 128);
+    LoadOam();
+    ScanlineEffect_Stop();
+    ScanlineEffect_Clear();
+    ResetSpriteData();
+    ResetTasks();
+    ResetPaletteFade();
+    sub_809F048();
+    SetVBlankCallback(VBlankCB);
+    SetMainCallback2(CB2_ResetRtcScreen);
+    CreateTask(Task_ResetRtcScreen, 80);
+}
+
+static void sub_809F048(void)
+{
+    clear_scheduled_bg_copies_to_vram();
+    ResetBgsAndClearDma3BusyFlags(0);
+    InitBgsFromTemplates(0, sBackgroundTemplates, ARRAY_COUNT(sBackgroundTemplates));
+    schedule_bg_copy_tilemap_to_vram(0);
+    SetGpuReg(REG_OFFSET_DISPCNT, DISPCNT_OBJ_ON | DISPCNT_OBJ_1D_MAP);
+    ShowBg(0);
+    InitWindows(sUnknown_08510408);
+    DeactivateAllTextPrinters();
+    sub_81973A4();
+}
+
+static void CB2_ResetRtcScreen(void)
+{
+    RunTasks();
+    AnimateSprites();
+    BuildOamBuffer();
+    do_scheduled_bg_tilemap_copies_to_vram();
+    UpdatePaletteFade();
+}
+
+static void VBlankCB(void)
+{
+    ProcessSpriteCopyRequests();
+    LoadOam();
+    TransferPlttBuffer();
+}
+
+static void ShowMessage(const u8 *str)
+{
+    sub_8197B1C(1, FALSE, 0x200, 0xF);
+    PrintTextOnWindow(1, 1, str, 0, 1, 0, NULL);
+    schedule_bg_copy_tilemap_to_vram(0);
+}
+
+static void Task_ShowResetRtcPrompt(u8 taskId)
+{
+    s16 *data = gTasks[taskId].data;
+
+    switch (data[0])
+    {
+    case 0:
+        SetWindowBorderStyle(0, FALSE, 0x214, 0xE);
+        PrintTextOnWindow(0, 1, gText_PresentTime, 0, 1, TEXT_SPEED_FF, 0);
+        PrintTime(
+            0,
+            0,
+            17,
+            gLocalTime.days,
+            gLocalTime.hours,
+            gLocalTime.minutes,
+            gLocalTime.seconds);
+        PrintTextOnWindow(0, 1, gText_PreviousTime, 0, 33, TEXT_SPEED_FF, 0);
+        PrintTime(
+            0,
+            0,
+            49,
+            gSaveBlock2Ptr->lastBerryTreeUpdate.days,
+            gSaveBlock2Ptr->lastBerryTreeUpdate.hours,
+            gSaveBlock2Ptr->lastBerryTreeUpdate.minutes,
+            gSaveBlock2Ptr->lastBerryTreeUpdate.seconds);
+        ShowMessage(gText_ResetRTCConfirmCancel);
+        CopyWindowToVram(0, 2);
+        schedule_bg_copy_tilemap_to_vram(0);
+        data[0]++;
+    case 1:
+        if (gMain.newKeys & B_BUTTON)
+        {
+            DestroyTask(taskId);
+            DoSoftReset();
+        }
+        else if (gMain.newKeys & A_BUTTON)
+        {
+            PlaySE(SE_SELECT);
+            DestroyTask(taskId);
+        }
+        break;
+    }
+}
+
+static void Task_ResetRtcScreen(u8 taskId)
+{
+    s16 *data = gTasks[taskId].data;
+
+    switch (data[0])
+    {
+    case 0:
+        BeginNormalPaletteFade(-1, 1, 0x10, 0, 0xFFFF);
+        data[0] = 1;
+        break;
+    case 1:
+        if (!gPaletteFade.active)
+        {
+            if (gSaveFileStatus == 0 || gSaveFileStatus == 2)
+            {
+                ShowMessage(gText_NoSaveFileCantSetTime);
+                data[0] = 5;
+            }
+            else
+            {
+                RtcCalcLocalTime();
+                data[1] = CreateTask(Task_ShowResetRtcPrompt, 80);
+                data[0] = 2;
+            }
+        }
+        break;
+    case 2:
+        if (gTasks[data[1]].isActive != TRUE)
+        {
+            sub_8198070(0, FALSE);
+            ShowMessage(gText_PleaseResetTime);
+            gLocalTime = gSaveBlock2Ptr->lastBerryTreeUpdate;
+            data[1] = CreateTask(Task_ResetRtc_0, 80);
+            data[0] = 3;
+        }
+        break;
+    case 3:
+        if (gTasks[data[1]].data[0])
+        {
+            if (!gTasks[data[1]].data[1])
+            {
+                DestroyTask(data[1]);
+                data[0] = 2;
+            }
+            else
+            {
+                DestroyTask(data[1]);
+                RtcReset();
+                RtcCalcLocalTimeOffset(
+                    gLocalTime.days,
+                    gLocalTime.hours,
+                    gLocalTime.minutes,
+                    gLocalTime.seconds);
+                gSaveBlock2Ptr->lastBerryTreeUpdate = gLocalTime;
+                VarSet(VAR_DAYS, gLocalTime.days);
+                DisableResetRTC();
+                ShowMessage(gText_ClockHasBeenReset);
+                data[0] = 4;
+            }
+        }
+        break;
+    case 4:
+        if (TrySavingData(0) == 1)
+        {
+            ShowMessage(gText_SaveCompleted);
+            PlaySE(SE_PINPON);
+        }
+        else
+        {
+            ShowMessage(gText_SaveFailed);
+            PlaySE(SE_BOO);
+        }
+        data[0] = 5;
+    case 5:
+        if (gMain.newKeys & A_BUTTON)
+        {
+            BeginNormalPaletteFade(-1, 1, 0, 0x10, 0xFFFF);
+            data[0] = 6;
+        }
+        else
+        {
+            break;
+        }
+    case 6:
+        if (!gPaletteFade.active)
+        {
+            DestroyTask(taskId);
+            FreeAllWindowBuffers();
+            DoSoftReset();
+        }
+    }
+}
diff --git a/src/start_menu.c b/src/start_menu.c
index cdabb0a56..53c5106d9 100644
--- a/src/start_menu.c
+++ b/src/start_menu.c
@@ -125,6 +125,13 @@ const struct WindowTemplate gUnknown_085105AC[] =
 const struct WindowTemplate gUnknown_085105BC = {0, 1, 1, 0xE, 0xA, 0xF, 8};
 
 // code
+void SetDexPokemonPokenavFlags(void) // unused
+{
+    FlagSet(FLAG_SYS_POKEDEX_GET);
+    FlagSet(FLAG_SYS_POKEMON_GET);
+    FlagSet(FLAG_SYS_POKENAV_GET);
+}
+
 void BuildStartMenuActions(void)
 {
     sNumStartMenuActions = 0;