Merge pull request #74 from jiangzhengwenjz/misc

menu_helpers

31 files changed, 376 insertions, 726 deletions

diff --git a/asm/battle_message.s b/asm/battle_message.s
index 9505d542b..efd7e1385 100644
--- a/asm/battle_message.s
+++ b/asm/battle_message.s
@@ -2683,7 +2683,7 @@ _080D87F2:
 	ands r0, r1
 	cmp r0, 0
 	beq _080D881C
-	bl sub_80CBE00
+	bl ContextNpcGetTextColor
 	lsls r0, 24
 	lsrs r0, 24
 	mov r2, sp
diff --git a/asm/berry_pouch.s b/asm/berry_pouch.s
index ab157ab99..67d189a12 100644
--- a/asm/berry_pouch.s
+++ b/asm/berry_pouch.s
@@ -183,7 +183,7 @@ _0813CE84:
 	.4byte _0813CFB0
 	.4byte _0813CFBE
 _0813CED0:
-	bl VblankHblankHandlerSetZero
+	bl SetVBlankHBlankCallbacksToNull
 	bl clear_scheduled_bg_copies_to_vram
 	b _0813CFD2
 _0813CEDA:
@@ -386,7 +386,7 @@ _0813D078: .4byte gUnknown_203F370
 	thumb_func_start sub_813D07C
 sub_813D07C: @ 813D07C
 	push {r4,lr}
-	bl InitBgReg
+	bl ResetAllBgsCoordinatesAndBgCntRegs
 	ldr r4, _0813D0DC @ =gUnknown_203F36C
 	ldr r0, [r4]
 	adds r0, 0xC
@@ -2338,7 +2338,7 @@ sub_813E010: @ 813E010
 	adds r0, r4, 0
 	adds r0, 0x10
 	ldrh r1, [r4, 0x4]
-	bl sub_80BF848
+	bl AdjustQuantityAccordingToDPadInput
 	lsls r0, 24
 	lsrs r0, 24
 	cmp r0, 0x1
@@ -3091,7 +3091,7 @@ sub_813E690: @ 813E690
 	adds r0, r5, 0
 	adds r0, 0x10
 	ldrh r1, [r5, 0x4]
-	bl sub_80BF848
+	bl AdjustQuantityAccordingToDPadInput
 	lsls r0, 24
 	lsrs r0, 24
 	cmp r0, 0x1
diff --git a/asm/field_specials.s b/asm/field_specials.s
index fcec338e7..ad1806d2e 100644
--- a/asm/field_specials.s
+++ b/asm/field_specials.s
@@ -3150,8 +3150,8 @@ _080CBDF8: .4byte gSelectedEventObject
 _080CBDFC: .4byte gUnknown_20370DA
 	thumb_func_end sub_80CBDE8
 
-	thumb_func_start sub_80CBE00
-sub_80CBE00: @ 80CBE00
+	thumb_func_start ContextNpcGetTextColor
+ContextNpcGetTextColor: @ 80CBE00
 	push {lr}
 	ldr r0, _080CBE18 @ =gUnknown_20370DA
 	ldrh r0, [r0]
@@ -3192,7 +3192,7 @@ _080CBE48:
 	bx r1
 	.align 2, 0
 _080CBE4C: .4byte gMapObjects
-	thumb_func_end sub_80CBE00
+	thumb_func_end ContextNpcGetTextColor
 
 	thumb_func_start sub_80CBE50
 sub_80CBE50: @ 80CBE50
diff --git a/asm/item_menu.s b/asm/item_menu.s
index bdefc393f..4e4c2ebfd 100644
--- a/asm/item_menu.s
+++ b/asm/item_menu.s
@@ -253,7 +253,7 @@ _08107F60:
 	.4byte _081080D8
 	.4byte _081080DE
 _08107FB0:
-	bl VblankHblankHandlerSetZero
+	bl SetVBlankHBlankCallbacksToNull
 	bl clear_scheduled_bg_copies_to_vram
 	b _08108104
 _08107FBA:
@@ -520,7 +520,7 @@ _081081CC: .4byte gUnknown_203AD1C
 	thumb_func_start sub_81081D0
 sub_81081D0: @ 81081D0
 	push {r4,r5,lr}
-	bl InitBgReg
+	bl ResetAllBgsCoordinatesAndBgCntRegs
 	ldr r5, _08108230 @ =gUnknown_203AD14
 	movs r4, 0x80
 	lsls r4, 4
@@ -3551,7 +3551,7 @@ _081099EC:
 	strb r0, [r4]
 	ldr r0, _08109A10 @ =gSpecialVar_ItemId
 	ldrh r0, [r0]
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	lsrs r0, 24
 	cmp r0, 0x1
@@ -4035,7 +4035,7 @@ sub_8109DEC: @ 8109DEC
 	adds r0, r4, 0
 	adds r0, 0x10
 	ldrh r1, [r4, 0x4]
-	bl sub_80BF848
+	bl AdjustQuantityAccordingToDPadInput
 	lsls r0, 24
 	lsrs r0, 24
 	cmp r0, 0x1
@@ -4817,7 +4817,7 @@ sub_810A468: @ 810A468
 	lsrs r4, r0, 16
 	adds r6, r4, 0
 	adds r0, r4, 0
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	lsrs r0, 24
 	cmp r0, 0x1
@@ -5296,7 +5296,7 @@ sub_810A85C: @ 810A85C
 	adds r0, r5, 0
 	adds r0, 0x10
 	ldrh r1, [r5, 0x4]
-	bl sub_80BF848
+	bl AdjustQuantityAccordingToDPadInput
 	lsls r0, 24
 	lsrs r0, 24
 	cmp r0, 0x1
@@ -5659,7 +5659,7 @@ sub_810AB88: @ 810AB88
 	adds r0, r4, 0
 	adds r0, 0x10
 	ldrh r1, [r4, 0x4]
-	bl sub_80BF848
+	bl AdjustQuantityAccordingToDPadInput
 	lsls r0, 24
 	lsrs r0, 24
 	cmp r0, 0x1
diff --git a/asm/link_rfu.s b/asm/link_rfu.s
index a1d543dd6..a2b6a20fc 100644
--- a/asm/link_rfu.s
+++ b/asm/link_rfu.s
@@ -3259,7 +3259,7 @@ sub_80FEC54: @ 80FEC54
 	push {r4,lr}
 	lsls r0, 24
 	lsrs r4, r0, 24
-	bl is_c1_link_related_active
+	bl IsUpdateLinkStateCBActive
 	cmp r0, 0
 	bne _080FEC70
 _080FEC62:
diff --git a/asm/mail_data.s b/asm/mail_data.s
index 421aaf452..e19c99e59 100644
--- a/asm/mail_data.s
+++ b/asm/mail_data.s
@@ -89,7 +89,7 @@ MonHasMail: @ 8097D08
 	bl GetMonData
 	lsls r0, 16
 	lsrs r0, 16
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	beq _08097D30
@@ -605,8 +605,8 @@ _080980E8:
 	bx r1
 	thumb_func_end sub_809803C
 
-	thumb_func_start itemid_is_mail
-itemid_is_mail: @ 80980F8
+	thumb_func_start ItemIsMail
+ItemIsMail: @ 80980F8
 	push {lr}
 	lsls r0, 16
 	lsrs r0, 16
@@ -621,6 +621,6 @@ _0809810A:
 _0809810C:
 	pop {r1}
 	bx r1
-	thumb_func_end itemid_is_mail
+	thumb_func_end ItemIsMail
 
 	.align 2, 0 @ Don't pad with nop.
diff --git a/asm/menu.s b/asm/menu.s
index 2229f41d8..c8e823fc1 100644
--- a/asm/menu.s
+++ b/asm/menu.s
@@ -5,8 +5,8 @@
 
 	.text
 
-	thumb_func_start sub_810EDC4
-sub_810EDC4: @ 810EDC4
+	thumb_func_start DrawDialogFrameWithCustomTileAndPalette
+DrawDialogFrameWithCustomTileAndPalette: @ 810EDC4
 	push {r4,r5,lr}
 	adds r4, r1, 0
 	lsls r0, 24
@@ -38,7 +38,7 @@ _0810EDFA:
 _0810EE00: .4byte gUnknown_203ADF0
 _0810EE04: .4byte gUnknown_203ADF2
 _0810EE08: .4byte sub_810EE5C
-	thumb_func_end sub_810EDC4
+	thumb_func_end DrawDialogFrameWithCustomTileAndPalette
 
 	thumb_func_start sub_810EE0C
 sub_810EE0C: @ 810EE0C
diff --git a/asm/menu_helpers.s b/asm/menu_helpers.s
deleted file mode 100644
index e68c428cd..000000000
--- a/asm/menu_helpers.s
+++ /dev/null
@@ -1,628 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start DisplayMessageAndContinueTask
-DisplayMessageAndContinueTask: @ 80BF474
-	push {r4-r7,lr}
-	mov r7, r8
-	push {r7}
-	sub sp, 0x10
-	ldr r4, [sp, 0x28]
-	ldr r5, [sp, 0x2C]
-	lsls r0, 24
-	lsrs r0, 24
-	mov r8, r0
-	lsls r1, 24
-	lsrs r1, 24
-	adds r6, r1, 0
-	lsls r2, 16
-	lsrs r2, 16
-	lsls r3, 24
-	lsrs r3, 24
-	lsls r4, 24
-	lsrs r7, r4, 24
-	lsls r5, 24
-	lsrs r5, 24
-	ldr r0, _080BF500 @ =gUnknown_20399D0
-	strb r6, [r0]
-	adds r0, r6, 0
-	movs r1, 0x1
-	bl sub_810EDC4
-	ldr r4, _080BF504 @ =gStringVar4
-	ldr r0, [sp, 0x30]
-	cmp r0, r4
-	beq _080BF4B8
-	adds r0, r4, 0
-	ldr r1, [sp, 0x30]
-	bl StringExpandPlaceholders
-_080BF4B8:
-	ldr r2, _080BF508 @ =gTextFlags
-	ldrb r0, [r2]
-	movs r1, 0x1
-	orrs r0, r1
-	strb r0, [r2]
-	movs r0, 0
-	str r0, [sp]
-	movs r0, 0x2
-	str r0, [sp, 0x4]
-	movs r0, 0x1
-	str r0, [sp, 0x8]
-	movs r0, 0x3
-	str r0, [sp, 0xC]
-	adds r0, r6, 0
-	adds r1, r7, 0
-	adds r2, r4, 0
-	adds r3, r5, 0
-	bl AddTextPrinterParameterized2
-	ldr r1, _080BF50C @ =gUnknown_20399CC
-	ldr r0, [sp, 0x34]
-	str r0, [r1]
-	ldr r1, _080BF510 @ =gTasks
-	mov r2, r8
-	lsls r0, r2, 2
-	add r0, r8
-	lsls r0, 3
-	adds r0, r1
-	ldr r1, _080BF514 @ =Task_ContinueTaskAfterMessagePrints
-	str r1, [r0]
-	add sp, 0x10
-	pop {r3}
-	mov r8, r3
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080BF500: .4byte gUnknown_20399D0
-_080BF504: .4byte gStringVar4
-_080BF508: .4byte gTextFlags
-_080BF50C: .4byte gUnknown_20399CC
-_080BF510: .4byte gTasks
-_080BF514: .4byte Task_ContinueTaskAfterMessagePrints
-	thumb_func_end DisplayMessageAndContinueTask
-
-	thumb_func_start sub_80BF518
-sub_80BF518: @ 80BF518
-	push {r4,lr}
-	adds r4, r0, 0
-	lsls r4, 24
-	lsrs r4, 24
-	bl RunTextPrinters
-	adds r0, r4, 0
-	bl IsTextPrinterActive
-	lsls r0, 16
-	lsrs r0, 16
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80BF518
-
-	thumb_func_start Task_ContinueTaskAfterMessagePrints
-Task_ContinueTaskAfterMessagePrints: @ 80BF534
-	push {r4,lr}
-	lsls r0, 24
-	lsrs r4, r0, 24
-	ldr r0, _080BF558 @ =gUnknown_20399D0
-	ldrb r0, [r0]
-	bl sub_80BF518
-	lsls r0, 16
-	cmp r0, 0
-	bne _080BF552
-	ldr r0, _080BF55C @ =gUnknown_20399CC
-	ldr r1, [r0]
-	adds r0, r4, 0
-	bl _call_via_r1
-_080BF552:
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080BF558: .4byte gUnknown_20399D0
-_080BF55C: .4byte gUnknown_20399CC
-	thumb_func_end Task_ContinueTaskAfterMessagePrints
-
-	thumb_func_start sub_80BF560
-sub_80BF560: @ 80BF560
-	push {r4,lr}
-	lsls r0, 24
-	lsrs r4, r0, 24
-	bl Menu_ProcessInputNoWrapClearOnChoose
-	lsls r0, 24
-	asrs r1, r0, 24
-	cmp r1, 0
-	beq _080BF586
-	cmp r1, 0
-	bgt _080BF580
-	movs r0, 0x1
-	negs r0, r0
-	cmp r1, r0
-	beq _080BF5A8
-	b _080BF5C0
-_080BF580:
-	cmp r1, 0x1
-	beq _080BF5A8
-	b _080BF5C0
-_080BF586:
-	movs r0, 0x5
-	bl PlaySE
-	ldr r1, _080BF5A0 @ =gTasks
-	lsls r0, r4, 2
-	adds r0, r4
-	lsls r0, 3
-	adds r0, r1
-	ldr r1, _080BF5A4 @ =gUnknown_20399C8
-	ldr r1, [r1]
-	ldr r1, [r1]
-	b _080BF5BE
-	.align 2, 0
-_080BF5A0: .4byte gTasks
-_080BF5A4: .4byte gUnknown_20399C8
-_080BF5A8:
-	movs r0, 0x5
-	bl PlaySE
-	ldr r1, _080BF5C8 @ =gTasks
-	lsls r0, r4, 2
-	adds r0, r4
-	lsls r0, 3
-	adds r0, r1
-	ldr r1, _080BF5CC @ =gUnknown_20399C8
-	ldr r1, [r1]
-	ldr r1, [r1, 0x4]
-_080BF5BE:
-	str r1, [r0]
-_080BF5C0:
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080BF5C8: .4byte gTasks
-_080BF5CC: .4byte gUnknown_20399C8
-	thumb_func_end sub_80BF560
-
-	thumb_func_start CreateYesNoMenuWithCallbacks
-CreateYesNoMenuWithCallbacks: @ 80BF5D0
-	push {r4-r7,lr}
-	sub sp, 0xC
-	adds r6, r0, 0
-	adds r0, r1, 0
-	adds r1, r2, 0
-	adds r2, r3, 0
-	ldr r3, [sp, 0x20]
-	ldr r4, [sp, 0x24]
-	ldr r5, [sp, 0x28]
-	ldr r7, [sp, 0x2C]
-	lsls r6, 24
-	lsrs r6, 24
-	lsls r1, 24
-	lsrs r1, 24
-	lsls r2, 24
-	lsrs r2, 24
-	lsls r3, 24
-	lsrs r3, 24
-	lsls r4, 16
-	lsrs r4, 16
-	lsls r5, 24
-	lsrs r5, 24
-	str r4, [sp]
-	str r5, [sp, 0x4]
-	movs r4, 0
-	str r4, [sp, 0x8]
-	bl CreateYesNoMenu
-	ldr r0, _080BF624 @ =gUnknown_20399C8
-	str r7, [r0]
-	ldr r1, _080BF628 @ =gTasks
-	lsls r0, r6, 2
-	adds r0, r6
-	lsls r0, 3
-	adds r0, r1
-	ldr r1, _080BF62C @ =sub_80BF560
-	str r1, [r0]
-	add sp, 0xC
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080BF624: .4byte gUnknown_20399C8
-_080BF628: .4byte gTasks
-_080BF62C: .4byte sub_80BF560
-	thumb_func_end CreateYesNoMenuWithCallbacks
-
-	thumb_func_start GetLRKeysState
-GetLRKeysState: @ 80BF630
-	push {lr}
-	ldr r0, _080BF650 @ =gSaveBlock2Ptr
-	ldr r0, [r0]
-	ldrb r0, [r0, 0x13]
-	cmp r0, 0x1
-	bne _080BF666
-	ldr r0, _080BF654 @ =gMain
-	ldrh r1, [r0, 0x2E]
-	movs r0, 0x80
-	lsls r0, 2
-	ands r0, r1
-	cmp r0, 0
-	beq _080BF658
-	movs r0, 0x1
-	b _080BF668
-	.align 2, 0
-_080BF650: .4byte gSaveBlock2Ptr
-_080BF654: .4byte gMain
-_080BF658:
-	movs r0, 0x80
-	lsls r0, 1
-	ands r0, r1
-	cmp r0, 0
-	beq _080BF666
-	movs r0, 0x2
-	b _080BF668
-_080BF666:
-	movs r0, 0
-_080BF668:
-	pop {r1}
-	bx r1
-	thumb_func_end GetLRKeysState
-
-	thumb_func_start sub_80BF66C
-sub_80BF66C: @ 80BF66C
-	push {lr}
-	ldr r0, _080BF68C @ =gSaveBlock2Ptr
-	ldr r0, [r0]
-	ldrb r0, [r0, 0x13]
-	cmp r0, 0x1
-	bne _080BF6A2
-	ldr r0, _080BF690 @ =gMain
-	ldrh r1, [r0, 0x30]
-	movs r0, 0x80
-	lsls r0, 2
-	ands r0, r1
-	cmp r0, 0
-	beq _080BF694
-	movs r0, 0x1
-	b _080BF6A4
-	.align 2, 0
-_080BF68C: .4byte gSaveBlock2Ptr
-_080BF690: .4byte gMain
-_080BF694:
-	movs r0, 0x80
-	lsls r0, 1
-	ands r0, r1
-	cmp r0, 0
-	beq _080BF6A2
-	movs r0, 0x2
-	b _080BF6A4
-_080BF6A2:
-	movs r0, 0
-_080BF6A4:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80BF66C
-
-	thumb_func_start sub_80BF6A8
-sub_80BF6A8: @ 80BF6A8
-	push {lr}
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0xAF
-	bne _080BF6D0
-	ldr r0, _080BF6CC @ =gSaveBlock1Ptr
-	ldr r0, [r0]
-	ldrh r1, [r0, 0x4]
-	movs r0, 0x80
-	lsls r0, 1
-	cmp r1, r0
-	beq _080BF6C8
-	bl InUnionRoom
-	cmp r0, 0x1
-	bne _080BF6D0
-_080BF6C8:
-	movs r0, 0
-	b _080BF6D2
-	.align 2, 0
-_080BF6CC: .4byte gSaveBlock1Ptr
-_080BF6D0:
-	movs r0, 0x1
-_080BF6D2:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80BF6A8
-
-	thumb_func_start itemid_80BF6D8_mail_related
-itemid_80BF6D8_mail_related: @ 80BF6D8
-	push {r4,lr}
-	lsls r0, 16
-	lsrs r4, r0, 16
-	bl is_c1_link_related_active
-	cmp r0, 0x1
-	beq _080BF6EE
-	bl InUnionRoom
-	cmp r0, 0x1
-	bne _080BF700
-_080BF6EE:
-	adds r0, r4, 0
-	bl itemid_is_mail
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	bne _080BF700
-	movs r0, 0
-	b _080BF702
-_080BF700:
-	movs r0, 0x1
-_080BF702:
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end itemid_80BF6D8_mail_related
-
-	thumb_func_start MenuHelpers_LinkSomething
-MenuHelpers_LinkSomething: @ 80BF708
-	push {lr}
-	bl is_c1_link_related_active
-	cmp r0, 0x1
-	beq _080BF71A
-	ldr r0, _080BF720 @ =gReceivedRemoteLinkPlayers
-	ldrb r0, [r0]
-	cmp r0, 0x1
-	bne _080BF724
-_080BF71A:
-	movs r0, 0x1
-	b _080BF726
-	.align 2, 0
-_080BF720: .4byte gReceivedRemoteLinkPlayers
-_080BF724:
-	movs r0, 0
-_080BF726:
-	pop {r1}
-	bx r1
-	thumb_func_end MenuHelpers_LinkSomething
-
-	thumb_func_start sub_80BF72C
-sub_80BF72C: @ 80BF72C
-	push {lr}
-	bl MenuHelpers_LinkSomething
-	lsls r0, 24
-	cmp r0, 0
-	beq _080BF742
-	bl sub_8058244
-	lsls r0, 24
-	lsrs r0, 24
-	b _080BF744
-_080BF742:
-	movs r0, 0
-_080BF744:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80BF72C
-
-	thumb_func_start sub_80BF748
-sub_80BF748: @ 80BF748
-	push {lr}
-	bl sub_80BF72C
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	beq _080BF75E
-	bl sub_800B270
-	cmp r0, 0x1
-	bne _080BF762
-_080BF75E:
-	movs r0, 0x1
-	b _080BF764
-_080BF762:
-	movs r0, 0
-_080BF764:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80BF748
-
-	thumb_func_start VblankHblankHandlerSetZero
-VblankHblankHandlerSetZero: @ 80BF768
-	push {lr}
-	movs r0, 0
-	bl SetVBlankCallback
-	movs r0, 0
-	bl SetHBlankCallback
-	pop {r0}
-	bx r0
-	thumb_func_end VblankHblankHandlerSetZero
-
-	thumb_func_start sub_80BF77C
-sub_80BF77C: @ 80BF77C
-	push {r4,lr}
-	sub sp, 0xC
-	bl InitBgReg
-	mov r1, sp
-	movs r0, 0
-	strh r0, [r1]
-	movs r1, 0xC0
-	lsls r1, 19
-	ldr r2, _080BF7BC @ =0x0100c000
-	mov r0, sp
-	bl CpuSet
-	movs r4, 0
-	str r4, [sp, 0x4]
-	add r0, sp, 0x4
-	movs r1, 0xE0
-	lsls r1, 19
-	ldr r2, _080BF7C0 @ =0x05000100
-	bl CpuSet
-	add r0, sp, 0x8
-	strh r4, [r0]
-	movs r1, 0xA0
-	lsls r1, 19
-	ldr r2, _080BF7C4 @ =0x01000200
-	bl CpuSet
-	add sp, 0xC
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080BF7BC: .4byte 0x0100c000
-_080BF7C0: .4byte 0x05000100
-_080BF7C4: .4byte 0x01000200
-	thumb_func_end sub_80BF77C
-
-	thumb_func_start InitBgReg
-InitBgReg: @ 80BF7C8
-	push {lr}
-	movs r0, 0
-	movs r1, 0
-	bl SetGpuReg
-	movs r0, 0xE
-	movs r1, 0
-	bl SetGpuReg
-	movs r0, 0xC
-	movs r1, 0
-	bl SetGpuReg
-	movs r0, 0xA
-	movs r1, 0
-	bl SetGpuReg
-	movs r0, 0x8
-	movs r1, 0
-	bl SetGpuReg
-	movs r0, 0
-	movs r1, 0
-	movs r2, 0
-	bl ChangeBgX
-	movs r0, 0
-	movs r1, 0
-	movs r2, 0
-	bl ChangeBgY
-	movs r0, 0x1
-	movs r1, 0
-	movs r2, 0
-	bl ChangeBgX
-	movs r0, 0x1
-	movs r1, 0
-	movs r2, 0
-	bl ChangeBgY
-	movs r0, 0x2
-	movs r1, 0
-	movs r2, 0
-	bl ChangeBgX
-	movs r0, 0x2
-	movs r1, 0
-	movs r2, 0
-	bl ChangeBgY
-	movs r0, 0x3
-	movs r1, 0
-	movs r2, 0
-	bl ChangeBgX
-	movs r0, 0x3
-	movs r1, 0
-	movs r2, 0
-	bl ChangeBgY
-	pop {r0}
-	bx r0
-	thumb_func_end InitBgReg
-
-	thumb_func_start sub_80BF848
-sub_80BF848: @ 80BF848
-	push {r4-r6,lr}
-	adds r2, r0, 0
-	lsls r1, 16
-	lsrs r1, 16
-	adds r5, r1, 0
-	ldrh r4, [r2]
-	adds r6, r4, 0
-	ldr r0, _080BF87C @ =gMain
-	ldrh r0, [r0, 0x30]
-	movs r3, 0xF0
-	ands r3, r0
-	cmp r3, 0x40
-	bne _080BF880
-	adds r0, r4, 0x1
-	strh r0, [r2]
-	movs r3, 0
-	ldrsh r0, [r2, r3]
-	cmp r0, r1
-	ble _080BF872
-	movs r0, 0x1
-	strh r0, [r2]
-_080BF872:
-	movs r0, 0
-	ldrsh r1, [r2, r0]
-_080BF876:
-	lsls r0, r4, 16
-	b _080BF8CA
-	.align 2, 0
-_080BF87C: .4byte gMain
-_080BF880:
-	cmp r3, 0x80
-	bne _080BF896
-	subs r0, r4, 0x1
-	strh r0, [r2]
-	lsls r0, 16
-	cmp r0, 0
-	bgt _080BF890
-	strh r1, [r2]
-_080BF890:
-	movs r3, 0
-	ldrsh r1, [r2, r3]
-	b _080BF876
-_080BF896:
-	cmp r3, 0x10
-	bne _080BF8B0
-	adds r0, r4, 0
-	adds r0, 0xA
-	strh r0, [r2]
-	movs r1, 0
-	ldrsh r0, [r2, r1]
-	cmp r0, r5
-	ble _080BF8AA
-	strh r5, [r2]
-_080BF8AA:
-	movs r3, 0
-	ldrsh r1, [r2, r3]
-	b _080BF876
-_080BF8B0:
-	cmp r3, 0x20
-	bne _080BF8DA
-	adds r0, r4, 0
-	subs r0, 0xA
-	strh r0, [r2]
-	lsls r0, 16
-	cmp r0, 0
-	bgt _080BF8C4
-	movs r0, 0x1
-	strh r0, [r2]
-_080BF8C4:
-	movs r0, 0
-	ldrsh r1, [r2, r0]
-	lsls r0, r6, 16
-_080BF8CA:
-	asrs r0, 16
-	cmp r1, r0
-	beq _080BF8DA
-	movs r0, 0x5
-	bl PlaySE
-	movs r0, 0x1
-	b _080BF8DC
-_080BF8DA:
-	movs r0, 0
-_080BF8DC:
-	pop {r4-r6}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80BF848
-
-	thumb_func_start sub_80BF8E4
-sub_80BF8E4: @ 80BF8E4
-	push {lr}
-	bl sub_80CBE00
-	lsls r0, 24
-	cmp r0, 0
-	beq _080BF8F4
-	movs r0, 0x5
-	b _080BF8F6
-_080BF8F4:
-	movs r0, 0x4
-_080BF8F6:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_80BF8E4
-
-	.align 2, 0 @ Don't pad with nop.
diff --git a/asm/new_menu_helpers.s b/asm/new_menu_helpers.s
index 9efda4372..5e7b10e5b 100644
--- a/asm/new_menu_helpers.s
+++ b/asm/new_menu_helpers.s
@@ -814,7 +814,7 @@ sub_80F6D5C: @ 80F6D5C
 	ands r1, r2
 	orrs r1, r0
 	strb r1, [r3]
-	bl sub_80CBE00
+	bl ContextNpcGetTextColor
 	lsls r0, 24
 	lsrs r0, 24
 	cmp r0, 0
@@ -2040,7 +2040,7 @@ _080F77A4:
 	adds r0, r4, 0
 	adds r1, r5, 0
 	movs r3, 0xF
-	bl sub_810EDC4
+	bl DrawDialogFrameWithCustomTileAndPalette
 	pop {r4,r5}
 	pop {r0}
 	bx r0
diff --git a/asm/overworld.s b/asm/overworld.s
index ee0e8aa6d..62add03d2 100644
--- a/asm/overworld.s
+++ b/asm/overworld.s
@@ -3225,8 +3225,8 @@ sub_8056420: @ 8056420
 	bx r0
 	thumb_func_end sub_8056420
 
-	thumb_func_start is_c1_link_related_active
-is_c1_link_related_active: @ 805642C
+	thumb_func_start IsUpdateLinkStateCBActive
+IsUpdateLinkStateCBActive: @ 805642C
 	push {lr}
 	ldr r0, _0805643C @ =gMain
 	ldr r1, [r0]
@@ -3243,7 +3243,7 @@ _08056444:
 _08056446:
 	pop {r1}
 	bx r1
-	thumb_func_end is_c1_link_related_active
+	thumb_func_end IsUpdateLinkStateCBActive
 
 	thumb_func_start sub_805644C
 sub_805644C: @ 805644C
@@ -3662,7 +3662,7 @@ _080567D8: .4byte sub_80565B4
 	thumb_func_start CB2_ReturnToField
 CB2_ReturnToField: @ 80567DC
 	push {lr}
-	bl is_c1_link_related_active
+	bl IsUpdateLinkStateCBActive
 	cmp r0, 0x1
 	bne _080567F4
 	ldr r0, _080567F0 @ =c2_exit_to_overworld_2_link
@@ -6144,7 +6144,7 @@ _08057C72:
 	bl sub_805833C
 	cmp r0, 0x1
 	bls _08057CA8
-	bl is_c1_link_related_active
+	bl IsUpdateLinkStateCBActive
 	cmp r0, 0x1
 	bne _08057CA8
 	bl sub_800A00C
@@ -6976,7 +6976,7 @@ _08058240: .4byte gUnknown_81BB9F0
 	thumb_func_start sub_8058244
 sub_8058244: @ 8058244
 	push {lr}
-	bl is_c1_link_related_active
+	bl IsUpdateLinkStateCBActive
 	cmp r0, 0
 	bne _08058252
 	movs r0, 0
@@ -7009,7 +7009,7 @@ sub_8058274: @ 8058274
 	bl sub_800B248
 	cmp r0, 0x1
 	bls _080582D8
-	bl is_c1_link_related_active
+	bl IsUpdateLinkStateCBActive
 	cmp r0, 0x1
 	bne _080582D8
 	bl sub_800A00C
@@ -7062,7 +7062,7 @@ sub_80582E0: @ 80582E0
 	bl sub_805833C
 	cmp r0, 0x1
 	bls _08058304
-	bl is_c1_link_related_active
+	bl IsUpdateLinkStateCBActive
 	cmp r0, 0x1
 	bne _08058304
 	bl sub_800A00C
diff --git a/asm/party_menu.s b/asm/party_menu.s
index 2c3623442..9042219e3 100644
--- a/asm/party_menu.s
+++ b/asm/party_menu.s
@@ -276,8 +276,8 @@ _0811EC24:
 	.4byte _0811EDD0
 	.4byte _0811EDDE
 _0811EC80:
-	bl VblankHblankHandlerSetZero
-	bl sub_80BF77C
+	bl SetVBlankHBlankCallbacksToNull
+	bl ClearVramOamPltt
 	bl clear_scheduled_bg_copies_to_vram
 	b _0811EDFC
 _0811EC8E:
@@ -565,7 +565,7 @@ _0811EEC8: .4byte gUnknown_203B0B8
 	thumb_func_start sub_811EECC
 sub_811EECC: @ 811EECC
 	push {r4,r5,lr}
-	bl InitBgReg
+	bl ResetAllBgsCoordinatesAndBgCntRegs
 	ldr r5, _0811EF34 @ =gUnknown_203B0BC
 	movs r4, 0x80
 	lsls r4, 4
@@ -3218,7 +3218,7 @@ sub_8120328: @ 8120328
 	lsrs r4, r0, 24
 	adds r5, r4, 0
 	movs r0, 0x6
-	bl sub_80BF518
+	bl RunTextPrinters_CheckActive
 	lsls r0, 16
 	lsrs r0, 16
 	cmp r0, 0x1
@@ -3536,7 +3536,7 @@ sub_81205C8: @ 81205C8
 	lsrs r4, r5, 16
 	adds r7, r4, 0
 	adds r0, r4, 0
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	lsrs r0, 24
 	cmp r0, 0x1
@@ -4529,7 +4529,7 @@ sub_8120D08: @ 8120D08
 	ldr r5, _08120D38 @ =gTasks+0x8
 	adds r0, r4, r5
 	ldrb r0, [r0]
-	bl sub_80BF518
+	bl RunTextPrinters_CheckActive
 	lsls r0, 16
 	lsrs r0, 16
 	cmp r0, 0x1
@@ -4643,7 +4643,7 @@ sub_8120DE0: @ 8120DE0
 	ldr r6, _08120E14 @ =gTasks+0x8
 	adds r4, r5, r6
 	ldrb r0, [r4]
-	bl sub_80BF518
+	bl RunTextPrinters_CheckActive
 	lsls r0, 16
 	lsrs r0, 16
 	cmp r0, 0x1
@@ -7031,7 +7031,7 @@ sub_81220D4: @ 81220D4
 	movs r1, 0x1
 	movs r2, 0x4F
 	movs r3, 0xE
-	bl sub_810EDC4
+	bl DrawDialogFrameWithCustomTileAndPalette
 	ldr r1, _0812210C @ =gUnknown_8417457
 	adds r0, r4, 0
 	bl sub_8122084
@@ -7553,7 +7553,7 @@ sub_81224D0: @ 81224D0
 	.align 2, 0
 _081224F4: .4byte gSprites
 _081224F8:
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	beq _0812251C
@@ -7643,7 +7643,7 @@ _08122588:
 	adds r0, r7, r5
 	ldrb r4, [r0]
 	adds r0, r1, 0
-	bl itemid_is_mail
+	bl ItemIsMail
 	adds r1, r0, 0
 	lsls r1, 24
 	lsrs r1, 24
@@ -7676,7 +7676,7 @@ _081225CC:
 	adds r0, r5, r7
 	ldrb r4, [r0, 0x6]
 	adds r0, r1, 0
-	bl itemid_is_mail
+	bl ItemIsMail
 	adds r1, r0, 0
 	lsls r1, 24
 	lsrs r1, 24
@@ -8327,7 +8327,7 @@ _08122AB6:
 	bl GetMonData
 	lsls r0, 16
 	lsrs r0, 16
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	beq _08122AEC
@@ -9937,7 +9937,7 @@ _081237C4: .4byte gPlayerParty
 _081237C8: .4byte sub_81238A4
 _081237CC:
 	ldrh r0, [r6]
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	beq _081237F8
@@ -10165,7 +10165,7 @@ _081239A4: .4byte gTasks
 _081239A8: .4byte sub_81203B8
 _081239AC:
 	ldrh r0, [r5]
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	beq _081239EC
@@ -16736,7 +16736,7 @@ _08126F84: .4byte gUnknown_203B0A0
 _08126F88: .4byte gPlayerParty
 _08126F8C:
 	ldrh r0, [r5]
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	beq _08126FA0
@@ -16780,7 +16780,7 @@ sub_8126FD8: @ 8126FD8
 	lsrs r4, r0, 24
 	ldr r5, _08127004 @ =gUnknown_203B0A0
 	ldrh r0, [r5, 0xC]
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	beq _08127010
@@ -17135,7 +17135,7 @@ _081272C4: .4byte gUnknown_203B0D8
 _081272C8: .4byte gStringVar4
 _081272CC:
 	adds r0, r4, 0
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	beq _081272F0
diff --git a/asm/pokemon_storage_system.s b/asm/pokemon_storage_system.s
index 4c851f4cb..a4c77e32e 100644
--- a/asm/pokemon_storage_system.s
+++ b/asm/pokemon_storage_system.s
@@ -3377,7 +3377,7 @@ _0808D3DC:
 	ldr r1, _0808D40C @ =0x00000ce2
 	adds r0, r1
 	ldrh r0, [r0]
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	beq _0808D404
@@ -3491,7 +3491,7 @@ _0808D4D8:
 	ldr r1, _0808D504 @ =0x00000ce2
 	adds r0, r1
 	ldrh r0, [r0]
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	beq _0808D508
@@ -4109,7 +4109,7 @@ _0808DA20:
 	ldr r2, _0808DA54 @ =0x00000ce2
 	adds r0, r2
 	ldrh r0, [r0]
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	bne _0808DAA0
@@ -4154,7 +4154,7 @@ _0808DA90:
 	ldr r2, _0808DAA8 @ =0x00000ce2
 	adds r0, r1, r2
 	ldrh r0, [r0]
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	beq _0808DAAC
@@ -4971,7 +4971,7 @@ _0808E166:
 	ldr r1, _0808E17C @ =0x00000ce2
 	adds r0, r1
 	ldrh r0, [r0]
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	bne _0808E180
@@ -5275,7 +5275,7 @@ _0808E3FC:
 	ldr r1, _0808E418 @ =0x00000ce2
 	adds r0, r1
 	ldrh r0, [r0]
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	bne _0808E41C
@@ -18314,7 +18314,7 @@ _08094A48: .4byte gUnknown_20397B0
 _08094A4C: .4byte 0x00000ce2
 _08094A50:
 	ldrh r0, [r1]
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	bne _08094A68
@@ -18344,7 +18344,7 @@ _08094A70:
 _08094A8C: .4byte 0x00000ce2
 _08094A90:
 	ldrh r0, [r1]
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	lsrs r0, 24
 	cmp r0, 0x1
diff --git a/asm/pokemon_summary_screen.s b/asm/pokemon_summary_screen.s
index 60062910c..301d7e0d7 100644
--- a/asm/pokemon_summary_screen.s
+++ b/asm/pokemon_summary_screen.s
@@ -8431,7 +8431,7 @@ _08138B48: .4byte 0x00003208
 	thumb_func_start sub_8138B4C
 sub_8138B4C: @ 8138B4C
 	push {lr}
-	bl is_c1_link_related_active
+	bl IsUpdateLinkStateCBActive
 	cmp r0, 0
 	bne _08138B84
 	bl sub_811FA20
@@ -13239,7 +13239,7 @@ _0813B16C:
 _0813B190: .4byte 0x000032f4
 _0813B194: .4byte 0x00003210
 _0813B198:
-	bl is_c1_link_related_active
+	bl IsUpdateLinkStateCBActive
 	cmp r0, 0
 	bne _0813B1C4
 	ldr r0, _0813B1C0 @ =gReceivedRemoteLinkPlayers
diff --git a/asm/shop.s b/asm/shop.s
index c59fb15df..370f8b296 100644
--- a/asm/shop.s
+++ b/asm/shop.s
@@ -23,7 +23,7 @@ sub_809AAB0: @ 809AAB0
 	strb r0, [r4, 0x16]
 	movs r0, 0
 	strh r0, [r4, 0xC]
-	bl sub_80CBE00
+	bl ContextNpcGetTextColor
 	lsls r0, 24
 	cmp r0, 0
 	bne _0809AAF0
@@ -515,7 +515,7 @@ _0809AEA0: .4byte gTasks
 _0809AEA4: .4byte sub_809AE00
 _0809AEA8: .4byte sub_809ADE4
 _0809AEAC:
-	bl VblankHblankHandlerSetZero
+	bl SetVBlankHBlankCallbacksToNull
 	str r4, [sp, 0x8]
 	movs r1, 0xE0
 	lsls r1, 19
@@ -2365,7 +2365,7 @@ sub_809BD8C: @ 809BD8C
 	adds r0, r4, 0x2
 	ldr r6, _0809BDD0 @ =gUnknown_2039934
 	ldrh r1, [r6, 0x14]
-	bl sub_80BF848
+	bl AdjustQuantityAccordingToDPadInput
 	lsls r0, 24
 	lsrs r0, 24
 	cmp r0, 0x1
diff --git a/asm/start_menu.s b/asm/start_menu.s
index 9dc9fbab6..cf06662d2 100644
--- a/asm/start_menu.s
+++ b/asm/start_menu.s
@@ -11,7 +11,7 @@ sub_806ED54: @ 806ED54
 	ldr r0, _0806ED6C @ =gUnknown_20370F5
 	movs r1, 0
 	strb r1, [r0]
-	bl is_c1_link_related_active
+	bl IsUpdateLinkStateCBActive
 	cmp r0, 0x1
 	bne _0806ED70
 	bl sub_806EE34
@@ -634,7 +634,7 @@ _0806F254: .4byte gUnknown_20370F0
 	thumb_func_start ShowStartMenu
 ShowStartMenu: @ 806F258
 	push {lr}
-	bl is_c1_link_related_active
+	bl IsUpdateLinkStateCBActive
 	cmp r0, 0
 	bne _0806F26E
 	bl player_bitmagic
diff --git a/asm/trade.s b/asm/trade.s
index eac1fdea5..a45cedc3e 100644
--- a/asm/trade.s
+++ b/asm/trade.s
@@ -13984,7 +13984,7 @@ sub_8053B48: @ 8053B48
 	ldrh r0, [r5, 0x28]
 	cmp r0, 0
 	beq _08053CC0
-	bl itemid_is_mail
+	bl ItemIsMail
 	lsls r0, 24
 	cmp r0, 0
 	beq _08053CB4
diff --git a/include/field_specials.h b/include/field_specials.h
index a12fee575..0e4fdd787 100644
--- a/include/field_specials.h
+++ b/include/field_specials.h
@@ -8,5 +8,8 @@ u8 CountDigits(u16 number);
 void TV_PrintIntToStringVar(u8, int);
 u16 ScrSpecial_GetStarter(void);
 void sub_80CCB68(void);
+void nullsub_60(void);
+void nullsub_61(void);
+u8 ContextNpcGetTextColor(void);
 
 #endif // GUARD_FIELD_SPECIALS_H
diff --git a/include/link.h b/include/link.h
index 33f04a42a..0ec32d8a0 100644
--- a/include/link.h
+++ b/include/link.h
@@ -206,5 +206,6 @@ void sub_800AA80(u8);
 void sub_80098D8(void);
 void CloseLink(void);
 bool8 sub_800A4BC(void);
+bool32 sub_800B270(void);
 
 #endif // GUARD_LINK_H
diff --git a/include/mail_data.h b/include/mail_data.h
index 0275d8dc6..79a4a7851 100644
--- a/include/mail_data.h
+++ b/include/mail_data.h
@@ -10,6 +10,6 @@
 // Exported ROM declarations
 
 u16 sub_80D45E8(u16, u16 *);
-bool8 itemid_is_mail(u16 itemId);
+bool8 ItemIsMail(u16 itemId);
 
 #endif //GUARD_MAIL_DATA_H
diff --git a/include/menu.h b/include/menu.h
index fa8552484..bc45e7e61 100644
--- a/include/menu.h
+++ b/include/menu.h
@@ -2,10 +2,12 @@
 #define GUARD_MENU_H
 
 #include "global.h"
-
 #include "text.h"
 #include "window.h"
 
+#define MENU_NOTHING_CHOSEN -2
+#define MENU_B_PRESSED -1
+
 struct MenuAction
 {
     const u8 *text;
@@ -45,7 +47,7 @@ void sub_810F71C(void);
 void sub_810F740(void);
 u8 ProgramAndPlaceMenuCursorOnWindow(u8 windowId, u8 fontId, u8 left, u8 top, u8 cursorHeight, u8 numChoices, u8 initialCursorPosition);
 void CreateYesNoMenu(const struct WindowTemplate *, u8, u8, u8, u16, u8, u8);
-
+void DrawDialogFrameWithCustomTileAndPalette(u8 windowId, bool8 copyToVram, u16 a2, u8 a3);
 void StartBlendTask(u8 eva_start, u8 evb_start, u8 eva_end, u8 evb_end, u8 ev_step, u8 priority);
 bool8 IsBlendTaskActive(void);
 void AddItemMenuActionTextPrinters(u8 windowId, u8 fontId, u8 left, u8 top, u8 letterSpacing, u8 lineHeight, u8 itemCount, const struct MenuAction *strs, const u8 *a8);
diff --git a/include/menu_helpers.h b/include/menu_helpers.h
index 25ef3252e..93a4fe5d3 100644
--- a/include/menu_helpers.h
+++ b/include/menu_helpers.h
@@ -19,14 +19,14 @@ void sub_812225C(u16 *, u16 *, u8, u8);
 void sub_8122298(u16 *, u16 *, u8, u8, u8);
 void sub_8121F68(u8 taskId, const struct YesNoFuncTable *data);
 bool8 sub_81221AC(void);
-bool16 sub_80BF518(u8 textPrinterId);
+bool16 RunTextPrinters_CheckActive(u8 textPrinterId);
 bool8 sub_80BF72C(void);
 bool8 MenuHelpers_LinkSomething(void);
-void VblankHblankHandlerSetZero(void);
-void InitBgReg(void);
+void SetVBlankHBlankCallbacksToNull(void);
+void ResetAllBgsCoordinatesAndBgCntRegs(void);
 u8 sub_80BF8E4(void);
-u8 sub_80BF848(s16 * a0, u16 a1);
+u8 AdjustQuantityAccordingToDPadInput(s16 * a0, u16 a1);
 void DisplayMessageAndContinueTask(u8 taskId, u8 windowId, u16 arg2, u8 arg3, u8 fontId, u8 textSpeed, const u8 *string, void *taskFunc);
-void CreateYesNoMenuWithCallbacks(u8 taskId, const struct WindowTemplate * unk1, u8 unk2, u8 unk3, u8 unk4, u8 unk5, u8 unk6, const struct YesNoFuncTable *ptrs);
+void CreateYesNoMenuWithCallbacks(u8 taskId, const struct WindowTemplate *template, u8 arg2, u8 arg3, u8 arg4, u16 tileStart, u8 palette, const struct YesNoFuncTable *yesNo);
 
 #endif //GUARD_MENU_HELPERS_H
diff --git a/include/overworld.h b/include/overworld.h
index ab77542c2..fed1a33a5 100644
--- a/include/overworld.h
+++ b/include/overworld.h
@@ -61,7 +61,7 @@ void Overworld_SetSavedMusic(u16);
 void Overworld_ChangeMusicToDefault(void);
 void Overworld_ChangeMusicTo(u16);
 
-bool32 is_c1_link_related_active(void);
+bool32 IsUpdateLinkStateCBActive(void);
 
 void strange_npc_table_clear(void);
 const struct MapHeader *get_mapheader_by_bank_and_number(u16, u16);
@@ -116,5 +116,6 @@ bool8 sub_8055FC4(void);
 bool8 is_light_level_8_or_9(u8 mapType);
 bool32 sub_8055C9C(void);
 void sub_8054D70(void);
+bool32 sub_8058244(void);
 
 #endif //GUARD_ROM4_H
diff --git a/ld_script.txt b/ld_script.txt
index 50e25d378..2664d8010 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -151,7 +151,7 @@ SECTIONS {
         asm/pc_screen_effect.o(.text);
         asm/fldeff_poison.o(.text);
         src/fldeff_berrytree.o(.text);
-        asm/field_special_scene.o(.text);
+        src/field_special_scene.o(.text);
         asm/safari_zone.o(.text);
         src/item_use.o(.text);
         asm/battle_anim_effects_1.o(.text);
@@ -176,7 +176,7 @@ SECTIONS {
         asm/easy_chat.o(.text);
         asm/mon_markings.o(.text);
         asm/mail.o(.text);
-        asm/menu_helpers.o(.text);
+        src/menu_helpers.o(.text);
         asm/script_pokemon_util_80BF8FC.o(.text);
         src/heal_location.o(.text);
         asm/region_map.o(.text);
diff --git a/src/field_special_scene.c b/src/field_special_scene.c
new file mode 100644
index 000000000..4f9446942
--- /dev/null
+++ b/src/field_special_scene.c
@@ -0,0 +1,26 @@
+#include "global.h"
+
+static u32 sub_80A0E78(void)
+{
+    return 0;
+}
+
+static void nullsub_57(void)
+{
+}
+
+static void nullsub_58(void)
+{
+}
+
+static void nullsub_59(void)
+{
+}
+
+void nullsub_60(void)
+{
+}
+
+void nullsub_61(void)
+{
+}
diff --git a/src/item_pc.c b/src/item_pc.c
index e2fa33f0a..afc82a73f 100644
--- a/src/item_pc.c
+++ b/src/item_pc.c
@@ -275,7 +275,7 @@ static bool8 ItemPc_DoGfxSetup(void)
     switch (gMain.state)
     {
     case 0:
-        VblankHblankHandlerSetZero();
+        SetVBlankHBlankCallbacksToNull();
         clear_scheduled_bg_copies_to_vram();
         gMain.state++;
         break;
@@ -415,7 +415,7 @@ static void Task_ItemPcWaitFadeAndBail(u8 taskId)
 
 static bool8 ItemPc_InitBgs(void)
 {
-    InitBgReg();
+    ResetAllBgsCoordinatesAndBgCntRegs();
     sBg1TilemapBuffer = Alloc(0x800);
     if (sBg1TilemapBuffer == NULL)
         return FALSE;
@@ -982,7 +982,7 @@ static void Task_ItemPcHandleWithdrawMultiple(u8 taskId)
 {
     s16 * data = gTasks[taskId].data;
 
-    if (sub_80BF848(&data[8], data[2]) == TRUE)
+    if (AdjustQuantityAccordingToDPadInput(&data[8], data[2]) == TRUE)
         sub_810E670(data[8]);
     else if (JOY_NEW(A_BUTTON))
     {
diff --git a/src/menu_helpers.c b/src/menu_helpers.c
new file mode 100644
index 000000000..12837c099
--- /dev/null
+++ b/src/menu_helpers.c
@@ -0,0 +1,251 @@
+#include "global.h"
+#include "task.h"
+#include "bg.h"
+#include "gpu_regs.h"
+#include "window.h"
+#include "menu.h"
+#include "menu_helpers.h"
+#include "new_menu_helpers.h"
+#include "string_util.h"
+#include "text.h"
+#include "sound.h"
+#include "link.h"
+#include "overworld.h"
+#include "mail_data.h"
+#include "field_specials.h"
+#include "constants/songs.h"
+#include "constants/items.h"
+
+static EWRAM_DATA const struct YesNoFuncTable *gUnknown_20399C8 = NULL;
+static EWRAM_DATA TaskFunc gUnknown_20399CC = NULL;
+static EWRAM_DATA u8 gUnknown_20399D0 = {0};
+
+static void Task_ContinueTaskAfterMessagePrints(u8 taskId);
+
+void DisplayMessageAndContinueTask(u8 taskId, u8 windowId, u16 arg2, u8 arg3, u8 fontId, u8 textSpeed, const u8 *string, void *taskFunc)
+{
+    gUnknown_20399D0 = windowId;
+    DrawDialogFrameWithCustomTileAndPalette(windowId, TRUE, arg2, arg3);
+
+    if (string != gStringVar4)
+        StringExpandPlaceholders(gStringVar4, string);
+
+    gTextFlags.canABSpeedUpPrint = 1;
+    AddTextPrinterParameterized2(windowId, fontId, gStringVar4, textSpeed, NULL, 2, 1, 3);
+    gUnknown_20399CC = taskFunc;
+    gTasks[taskId].func = Task_ContinueTaskAfterMessagePrints;
+}
+
+bool16 RunTextPrinters_CheckActive(u8 textPrinterId)
+{
+    RunTextPrinters();
+    return IsTextPrinterActive(textPrinterId);
+}
+
+static void Task_ContinueTaskAfterMessagePrints(u8 taskId)
+{
+    if (!RunTextPrinters_CheckActive(gUnknown_20399D0))
+        gUnknown_20399CC(taskId);
+}
+
+static void Task_CallYesOrNoCallback(u8 taskId)
+{
+    switch (Menu_ProcessInputNoWrapClearOnChoose())
+    {
+    case 0:
+        PlaySE(SE_SELECT);
+        gTasks[taskId].func = gUnknown_20399C8->yesFunc;
+        break;
+    case 1:
+    case MENU_B_PRESSED:
+        PlaySE(SE_SELECT);
+        gTasks[taskId].func = gUnknown_20399C8->noFunc;
+        break;
+    }
+}
+
+void CreateYesNoMenuWithCallbacks(u8 taskId, const struct WindowTemplate *template, u8 arg2, u8 arg3, u8 arg4, u16 tileStart, u8 palette, const struct YesNoFuncTable *yesNo)
+{
+    CreateYesNoMenu(template, arg2, arg3, arg4, tileStart, palette, 0);
+    gUnknown_20399C8 = yesNo;
+    gTasks[taskId].func = Task_CallYesOrNoCallback;
+}
+
+u8 GetLRKeysState(void)
+{
+    if (gSaveBlock2Ptr->optionsButtonMode == OPTIONS_BUTTON_MODE_LR)
+    {
+        if (JOY_NEW(L_BUTTON))
+            return 1;
+        if (JOY_NEW(R_BUTTON))
+            return 2;
+    }
+    return 0;
+}
+
+u8 sub_80BF66C(void)
+{
+    if (gSaveBlock2Ptr->optionsButtonMode == OPTIONS_BUTTON_MODE_LR)
+    {
+        if (JOY_REPT(L_BUTTON))
+            return 1;
+        if (JOY_REPT(R_BUTTON))
+            return 2;
+    }
+    return 0;
+}
+
+bool8 sub_80BF6A8(u16 itemId)
+{
+    if (itemId != ITEM_ENIGMA_BERRY)
+        return TRUE;
+    else if (!gSaveBlock1Ptr->location.mapGroup && gSaveBlock1Ptr->location.mapNum == 1)
+        return FALSE;
+    else if (InUnionRoom() != TRUE)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+bool8 itemid_80BF6D8_mail_related(u16 itemId)
+{
+    if (IsUpdateLinkStateCBActive() != TRUE && InUnionRoom() != TRUE)
+        return TRUE;
+    else if (ItemIsMail(itemId) != TRUE)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+bool8 MenuHelpers_LinkSomething(void)
+{
+    if (IsUpdateLinkStateCBActive() == TRUE || gReceivedRemoteLinkPlayers == 1)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+bool8 sub_80BF72C(void)
+{
+    if (!MenuHelpers_LinkSomething())
+        return FALSE;
+    else
+        return sub_8058244();
+}
+
+bool8 sub_80BF748(void)
+{
+    if (sub_80BF72C() == TRUE)
+        return TRUE;
+    else if (sub_800B270() != TRUE)
+        return FALSE;
+    else
+        return TRUE;
+}
+
+void SetVBlankHBlankCallbacksToNull(void)
+{
+    SetVBlankCallback(NULL);
+    SetHBlankCallback(NULL);
+}
+
+void ClearVramOamPltt(void)
+{
+    ResetAllBgsCoordinatesAndBgCntRegs();
+    CpuFill16(0, (void*) VRAM, VRAM_SIZE);
+    CpuFill32(0, (void*) OAM, OAM_SIZE);
+    CpuFill16(0, (void*) PLTT, PLTT_SIZE);
+}
+
+void ResetAllBgsCoordinatesAndBgCntRegs(void)
+{
+    SetGpuReg(REG_OFFSET_DISPCNT, 0);
+    SetGpuReg(REG_OFFSET_BG3CNT, 0);
+    SetGpuReg(REG_OFFSET_BG2CNT, 0);
+    SetGpuReg(REG_OFFSET_BG1CNT, 0);
+    SetGpuReg(REG_OFFSET_BG0CNT, 0);
+    ChangeBgX(0, 0, 0);
+    ChangeBgY(0, 0, 0);
+    ChangeBgX(1, 0, 0);
+    ChangeBgY(1, 0, 0);
+    ChangeBgX(2, 0, 0);
+    ChangeBgY(2, 0, 0);
+    ChangeBgX(3, 0, 0);
+    ChangeBgY(3, 0, 0);
+}
+
+bool8 AdjustQuantityAccordingToDPadInput(s16 *arg0, u16 arg1)
+{
+    s16 valBefore = (*arg0);
+
+    if (JOY_REPT(DPAD_ANY) == DPAD_UP)
+    {
+        (*arg0)++;
+        if ((*arg0) > arg1)
+            (*arg0) = 1;
+
+        if ((*arg0) == valBefore)
+        {
+            return FALSE;
+        }
+        else
+        {
+            PlaySE(SE_SELECT);
+            return TRUE;
+        }
+    }
+    else if (JOY_REPT(DPAD_ANY) == DPAD_DOWN)
+    {
+        (*arg0)--;
+        if ((*arg0) <= 0)
+            (*arg0) = arg1;
+        if ((*arg0) == valBefore)
+        {
+            return FALSE;
+        }
+        else
+        {
+            PlaySE(SE_SELECT);
+            return TRUE;
+        }
+    }
+    else if (JOY_REPT(DPAD_ANY) == DPAD_RIGHT)
+    {
+        (*arg0) += 10;
+        if ((*arg0) > arg1)
+            (*arg0) = arg1;
+        if ((*arg0) == valBefore)
+        {
+            return FALSE;
+        }
+        else
+        {
+            PlaySE(SE_SELECT);
+            return TRUE;
+        }
+    }
+    else if (JOY_REPT(DPAD_ANY) == DPAD_LEFT)
+    {
+        (*arg0) -= 10;
+        if ((*arg0) <= 0)
+            (*arg0) = 1;
+        if ((*arg0) == valBefore)
+        {
+            return FALSE;
+        }
+        else
+        {
+            PlaySE(SE_SELECT);
+            return TRUE;
+        }
+    }
+    return FALSE;
+}
+
+u8 sub_80BF8E4(void)
+{
+    if (!ContextNpcGetTextColor())
+        return 4;
+    else
+        return 5;
+}
diff --git a/src/mystery_event_script.c b/src/mystery_event_script.c
index c9dc6ae81..70566ca58 100644
--- a/src/mystery_event_script.c
+++ b/src/mystery_event_script.c
@@ -267,7 +267,7 @@ bool8 MEScrCmd_givepokemon(struct ScriptContext *ctx)
         }
 
         heldItem = GetMonData(&gPlayerParty[5], MON_DATA_HELD_ITEM);
-        if (itemid_is_mail(heldItem))
+        if (ItemIsMail(heldItem))
             GiveMailToMon2(&gPlayerParty[5], &mail);
         CompactPartySlots();
         CalculatePlayerPartyCount();
diff --git a/src/scrcmd.c b/src/scrcmd.c
index 7c27293a7..12b2892bb 100644
--- a/src/scrcmd.c
+++ b/src/scrcmd.c
@@ -1201,7 +1201,7 @@ bool8 ScrCmd_turnvobject(struct ScriptContext *ctx)
 
 bool8 ScrCmd_lockall(struct ScriptContext *ctx)
 {
-    if (is_c1_link_related_active())
+    if (IsUpdateLinkStateCBActive())
     {
         return FALSE;
     }
@@ -1215,7 +1215,7 @@ bool8 ScrCmd_lockall(struct ScriptContext *ctx)
 
 bool8 ScrCmd_lock(struct ScriptContext *ctx)
 {
-    if (is_c1_link_related_active())
+    if (IsUpdateLinkStateCBActive())
     {
         return FALSE;
     }
diff --git a/src/teachy_tv.c b/src/teachy_tv.c
index efffe2840..eb5a7293d 100644
--- a/src/teachy_tv.c
+++ b/src/teachy_tv.c
@@ -475,7 +475,7 @@ static void TeachyTvMainCallback(void)
         sResources->savedCallback = NULL;
         sResources->grassAnimDisabled = 0;
         sResources->scrollIndicatorArrowPairId = 0xFF;
-        VblankHblankHandlerSetZero();
+        SetVBlankHBlankCallbacksToNull();
         clear_scheduled_bg_copies_to_vram();
         ScanlineEffect_Stop();
         FreeAllSpritePalettes();
@@ -521,7 +521,7 @@ static void TeachyTvMainCallback(void)
 
 static void TeachyTvSetupBg(void)
 {
-    InitBgReg();
+    ResetAllBgsCoordinatesAndBgCntRegs();
     ResetBgsAndClearDma3BusyFlags(0);
     InitBgsFromTemplates(0, sBgTemplates, 4);
     SetBgTilemapBuffer(1, sResources->buffer1);
@@ -817,7 +817,7 @@ static void TTVcmd_NpcMoveAndSetupTextPrinter(u8 taskId)
 static void TTVcmd_IdleIfTextPrinterIsActive(u8 taskId)
 {
     s16 *data = gTasks[taskId].data;
-    if (!sub_80BF518(0))
+    if (!RunTextPrinters_CheckActive(0))
         ++data[3];
 }
 
@@ -945,7 +945,7 @@ static const u8 sGrassAnimArray[] =
 static void TTVcmd_IdleIfTextPrinterIsActive2(u8 taskId)
 {
     s16 *data = gTasks[taskId].data;
-    if (!sub_80BF518(0))
+    if (!RunTextPrinters_CheckActive(0))
         ++data[3];
 }
 
diff --git a/src/tm_case.c b/src/tm_case.c
index 28aba57a0..7c26c1c58 100644
--- a/src/tm_case.c
+++ b/src/tm_case.c
@@ -321,7 +321,7 @@ static bool8 DoSetUpTMCaseUI(void)
     switch (gMain.state)
     {
     case 0:
-        VblankHblankHandlerSetZero();
+        SetVBlankHBlankCallbacksToNull();
         clear_scheduled_bg_copies_to_vram();
         gMain.state++;
         break;
@@ -426,7 +426,7 @@ static void ResetBufferPointers_NoFree(void)
 static void LoadBGTemplates(void)
 {
     void ** ptr;
-    InitBgReg();
+    ResetAllBgsCoordinatesAndBgCntRegs();
     ptr = &sTilemapBuffer;
     *ptr = AllocZeroed(0x800);
     ResetBgsAndClearDma3BusyFlags(0);
@@ -1058,7 +1058,7 @@ static void Task_QuantitySelect_HandleInput(u8 taskId)
 {
     s16 * data = gTasks[taskId].data;
 
-    if (sub_80BF848(&data[8], data[2]) == 1)
+    if (AdjustQuantityAccordingToDPadInput(&data[8], data[2]) == 1)
     {
         SellTM_PrintQuantityAndSalePrice(data[8], itemid_get_market_price(BagGetItemIdByPocketPosition(POCKET_TM_CASE, data[1])) / 2 * data[8]);
     }
diff --git a/sym_ewram.txt b/sym_ewram.txt
index a8672a553..ca297b540 100644
--- a/sym_ewram.txt
+++ b/sym_ewram.txt
@@ -1010,15 +1010,9 @@ gUnknown_20399C0: @ 20399C0
 gUnknown_20399C4: @ 20399C4
 	.space 0x4
 
-gUnknown_20399C8: @ 20399C8
-	.space 0x4
-
-gUnknown_20399CC: @ 20399CC
-	.space 0x4
-
-gUnknown_20399D0: @ 20399D0
-	.space 0x4
+	.include "src/menu_helpers.o"
 
+	.align 2
 gUnknown_20399D4: @ 20399D4
 	.space 0x4