start menu helpers decomp

3 files changed, 401 insertions, 756 deletions

diff --git a/asm/menu_helpers.s b/asm/menu_helpers.s
index 90e846b97..dd8e1401b 100644
--- a/asm/menu_helpers.s
+++ b/asm/menu_helpers.s
@@ -5,764 +5,8 @@
 
 	.text
 
-	thumb_func_start ResetVramOamAndBgCntRegs
-ResetVramOamAndBgCntRegs: @ 8121DA0
-	push {r4,lr}
-	sub sp, 0xC
-	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
-	mov r1, sp
-	movs r0, 0
-	strh r0, [r1]
-	movs r1, 0xC0
-	lsls r1, 19
-	ldr r2, =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, =0x05000100
-	bl CpuSet
-	add r0, sp, 0x8
-	strh r4, [r0]
-	movs r1, 0xA0
-	lsls r1, 19
-	ldr r2, =0x01000200
-	bl CpuSet
-	add sp, 0xC
-	pop {r4}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end ResetVramOamAndBgCntRegs
-
-	thumb_func_start ResetAllBgsCoordinates
-ResetAllBgsCoordinates: @ 8121E10
-	push {lr}
-	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 ResetAllBgsCoordinates
-
-	thumb_func_start SetVBlankHBlankCallbacksToNull
-@ void SetVBlankHBlankCallbacksToNull()
-SetVBlankHBlankCallbacksToNull: @ 8121E68
-	push {lr}
-	movs r0, 0
-	bl SetVBlankCallback
-	movs r0, 0
-	bl SetHBlankCallback
-	pop {r0}
-	bx r0
-	thumb_func_end SetVBlankHBlankCallbacksToNull
-
-	thumb_func_start DisplayMessageAndContinueTask
-@ void DisplayMessageAndContinueTask(u8 taskId, u8 windowId, u16 windowBorderFirstTileNum, u8 windowBorderPalette, u8 fontId, u8 speed, u8 *str, void ( *callback)(u8 taskId))
-DisplayMessageAndContinueTask: @ 8121E7C
-	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, =gUnknown_0203A140
-	strb r6, [r0]
-	adds r0, r6, 0
-	movs r1, 0x1
-	bl sub_8197B1C
-	ldr r4, =gStringVar4
-	ldr r0, [sp, 0x30]
-	cmp r0, r4
-	beq _08121EC0
-	adds r0, r4, 0
-	ldr r1, [sp, 0x30]
-	bl StringExpandPlaceholders
-_08121EC0:
-	ldr r2, =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 AddTextPrinterParameterized
-	ldr r1, =gUnknown_0300117C
-	ldr r0, [sp, 0x34]
-	str r0, [r1]
-	ldr r1, =gTasks
-	mov r2, r8
-	lsls r0, r2, 2
-	add r0, r8
-	lsls r0, 3
-	adds r0, r1
-	ldr r1, =Task_ContinueTaskAfterMessagePrints
-	str r1, [r0]
-	add sp, 0x10
-	pop {r3}
-	mov r8, r3
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end DisplayMessageAndContinueTask
 
-	thumb_func_start RunTextPrintersRetIsActive
-RunTextPrintersRetIsActive: @ 8121F20
-	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 RunTextPrintersRetIsActive
 
-	thumb_func_start Task_ContinueTaskAfterMessagePrints
-@ void Task_ContinueTaskAfterMessagePrints(u8 taskId)
-Task_ContinueTaskAfterMessagePrints: @ 8121F3C
-	push {r4,lr}
-	lsls r0, 24
-	lsrs r4, r0, 24
-	ldr r0, =gUnknown_0203A140
-	ldrb r0, [r0]
-	bl RunTextPrintersRetIsActive
-	lsls r0, 16
-	cmp r0, 0
-	bne _08121F5A
-	ldr r0, =gUnknown_0300117C
-	ldr r1, [r0]
-	adds r0, r4, 0
-	bl _call_via_r1
-_08121F5A:
-	pop {r4}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end Task_ContinueTaskAfterMessagePrints
-
-	thumb_func_start sub_8121F68
-sub_8121F68: @ 8121F68
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r3, =gUnknown_0203A138
-	ldr r2, [r1, 0x4]
-	ldr r1, [r1]
-	str r1, [r3]
-	str r2, [r3, 0x4]
-	ldr r2, =gTasks
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 3
-	adds r1, r2
-	ldr r0, =Task_CallYesOrNoCallback
-	str r0, [r1]
-	bx lr
-	.pool
-	thumb_func_end sub_8121F68
-
-	thumb_func_start CreateYesNoMenuWithCallbacks
-@ void CreateYesNoMenuWithCallbacks(u8 taskId, struct WindowTemplate *windowTemplate, int a3, int a4, int a5, u16 borderFirstTileNum, u8 borderPalette, void ( **callbacks)(u8 taskId))
-CreateYesNoMenuWithCallbacks: @ 8121F94
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	adds r0, r1, 0
-	ldr r1, [sp, 0x10]
-	ldr r2, [sp, 0x14]
-	ldr r5, [sp, 0x18]
-	lsls r4, 24
-	lsrs r4, 24
-	lsls r1, 16
-	lsrs r1, 16
-	lsls r2, 24
-	lsrs r2, 24
-	movs r3, 0
-	bl CreateYesNoMenu
-	ldr r2, =gUnknown_0203A138
-	ldr r0, [r5]
-	ldr r1, [r5, 0x4]
-	str r0, [r2]
-	str r1, [r2, 0x4]
-	ldr r1, =gTasks
-	lsls r0, r4, 2
-	adds r0, r4
-	lsls r0, 3
-	adds r0, r1
-	ldr r1, =Task_CallYesOrNoCallback
-	str r1, [r0]
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end CreateYesNoMenuWithCallbacks
-
-	thumb_func_start Task_CallYesOrNoCallback
-@ void Task_CallYesOrNoCallback(u8 taskId)
-Task_CallYesOrNoCallback: @ 8121FDC
-	push {r4,lr}
-	lsls r0, 24
-	lsrs r4, r0, 24
-	bl ProcessMenuInputNoWrap_
-	lsls r0, 24
-	asrs r1, r0, 24
-	cmp r1, 0
-	beq _08122002
-	cmp r1, 0
-	bgt _08121FFC
-	movs r0, 0x1
-	negs r0, r0
-	cmp r1, r0
-	beq _08122018
-	b _08122028
-_08121FFC:
-	cmp r1, 0x1
-	beq _08122018
-	b _08122028
-_08122002:
-	movs r0, 0x5
-	bl PlaySE
-	ldr r0, =gUnknown_0203A138
-	ldr r1, [r0]
-	adds r0, r4, 0
-	bl _call_via_r1
-	b _08122028
-	.pool
-_08122018:
-	movs r0, 0x5
-	bl PlaySE
-	ldr r0, =gUnknown_0203A138
-	ldr r1, [r0, 0x4]
-	adds r0, r4, 0
-	bl _call_via_r1
-_08122028:
-	pop {r4}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end Task_CallYesOrNoCallback
-
-	thumb_func_start AdjustQuantityAccordingToDPadInput
-@ bool8 AdjustQuantityAccordingToDPadInput(u16 *quantity, u16 maxQuantity)
-AdjustQuantityAccordingToDPadInput: @ 8122034
-	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, =gMain
-	ldrh r0, [r0, 0x30]
-	movs r3, 0xF0
-	ands r3, r0
-	cmp r3, 0x40
-	bne _0812206C
-	adds r0, r4, 0x1
-	strh r0, [r2]
-	movs r3, 0
-	ldrsh r0, [r2, r3]
-	cmp r0, r1
-	ble _0812205E
-	movs r0, 0x1
-	strh r0, [r2]
-_0812205E:
-	movs r0, 0
-	ldrsh r1, [r2, r0]
-_08122062:
-	lsls r0, r4, 16
-	b _081220B6
-	.pool
-_0812206C:
-	cmp r3, 0x80
-	bne _08122082
-	subs r0, r4, 0x1
-	strh r0, [r2]
-	lsls r0, 16
-	cmp r0, 0
-	bgt _0812207C
-	strh r1, [r2]
-_0812207C:
-	movs r3, 0
-	ldrsh r1, [r2, r3]
-	b _08122062
-_08122082:
-	cmp r3, 0x10
-	bne _0812209C
-	adds r0, r4, 0
-	adds r0, 0xA
-	strh r0, [r2]
-	movs r1, 0
-	ldrsh r0, [r2, r1]
-	cmp r0, r5
-	ble _08122096
-	strh r5, [r2]
-_08122096:
-	movs r3, 0
-	ldrsh r1, [r2, r3]
-	b _08122062
-_0812209C:
-	cmp r3, 0x20
-	bne _081220C6
-	adds r0, r4, 0
-	subs r0, 0xA
-	strh r0, [r2]
-	lsls r0, 16
-	cmp r0, 0
-	bgt _081220B0
-	movs r0, 0x1
-	strh r0, [r2]
-_081220B0:
-	movs r0, 0
-	ldrsh r1, [r2, r0]
-	lsls r0, r6, 16
-_081220B6:
-	asrs r0, 16
-	cmp r1, r0
-	beq _081220C6
-	movs r0, 0x5
-	bl PlaySE
-	movs r0, 0x1
-	b _081220C8
-_081220C6:
-	movs r0, 0
-_081220C8:
-	pop {r4-r6}
-	pop {r1}
-	bx r1
-	thumb_func_end AdjustQuantityAccordingToDPadInput
-
-	thumb_func_start GetLRKeysState
-GetLRKeysState: @ 81220D0
-	push {lr}
-	ldr r0, =gSaveBlock2Ptr
-	ldr r0, [r0]
-	ldrb r0, [r0, 0x13]
-	cmp r0, 0x1
-	bne _08122106
-	ldr r0, =gMain
-	ldrh r1, [r0, 0x2E]
-	movs r0, 0x80
-	lsls r0, 2
-	ands r0, r1
-	cmp r0, 0
-	beq _081220F8
-	movs r0, 0x1
-	b _08122108
-	.pool
-_081220F8:
-	movs r0, 0x80
-	lsls r0, 1
-	ands r0, r1
-	cmp r0, 0
-	beq _08122106
-	movs r0, 0x2
-	b _08122108
-_08122106:
-	movs r0, 0
-_08122108:
-	pop {r1}
-	bx r1
-	thumb_func_end GetLRKeysState
-
-	thumb_func_start sub_812210C
-sub_812210C: @ 812210C
-	push {lr}
-	ldr r0, =gSaveBlock2Ptr
-	ldr r0, [r0]
-	ldrb r0, [r0, 0x13]
-	cmp r0, 0x1
-	bne _08122142
-	ldr r0, =gMain
-	ldrh r1, [r0, 0x30]
-	movs r0, 0x80
-	lsls r0, 2
-	ands r0, r1
-	cmp r0, 0
-	beq _08122134
-	movs r0, 0x1
-	b _08122144
-	.pool
-_08122134:
-	movs r0, 0x80
-	lsls r0, 1
-	ands r0, r1
-	cmp r0, 0
-	beq _08122142
-	movs r0, 0x2
-	b _08122144
-_08122142:
-	movs r0, 0
-_08122144:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_812210C
-
-	thumb_func_start sub_8122148
-sub_8122148: @ 8122148
-	push {lr}
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0xAF
-	bne _08122174
-	ldr r0, =gSaveBlock1Ptr
-	ldr r0, [r0]
-	ldrh r1, [r0, 0x4]
-	ldr r0, =0x00001919
-	cmp r1, r0
-	beq _08122166
-	bl InUnionRoom
-	cmp r0, 0x1
-	bne _08122174
-_08122166:
-	movs r0, 0
-	b _08122176
-	.pool
-_08122174:
-	movs r0, 0x1
-_08122176:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_8122148
-
-	thumb_func_start itemid_80BF6D8_mail_related
-itemid_80BF6D8_mail_related: @ 812217C
-	push {r4,lr}
-	lsls r0, 16
-	lsrs r4, r0, 16
-	bl is_c1_link_related_active
-	cmp r0, 0x1
-	beq _08122192
-	bl InUnionRoom
-	cmp r0, 0x1
-	bne _081221A4
-_08122192:
-	adds r0, r4, 0
-	bl ItemIsMail
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	bne _081221A4
-	movs r0, 0
-	b _081221A6
-_081221A4:
-	movs r0, 0x1
-_081221A6:
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end itemid_80BF6D8_mail_related
-
-	thumb_func_start sub_81221AC
-sub_81221AC: @ 81221AC
-	push {lr}
-	bl is_c1_link_related_active
-	cmp r0, 0x1
-	beq _081221BE
-	ldr r0, =gReceivedRemoteLinkPlayers
-	ldrb r0, [r0]
-	cmp r0, 0x1
-	bne _081221C8
-_081221BE:
-	movs r0, 0x1
-	b _081221CA
-	.pool
-_081221C8:
-	movs r0, 0
-_081221CA:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81221AC
-
-	thumb_func_start sub_81221D0
-sub_81221D0: @ 81221D0
-	push {lr}
-	bl sub_81221AC
-	lsls r0, 24
-	cmp r0, 0
-	beq _081221E6
-	bl sub_8087598
-	lsls r0, 24
-	lsrs r0, 24
-	b _081221E8
-_081221E6:
-	movs r0, 0
-_081221E8:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81221D0
-
-	thumb_func_start sub_81221EC
-sub_81221EC: @ 81221EC
-	push {lr}
-	bl sub_81221D0
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	beq _08122202
-	bl sub_800B504
-	cmp r0, 0x1
-	bne _08122206
-_08122202:
-	movs r0, 0x1
-	b _08122208
-_08122206:
-	movs r0, 0
-_08122208:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81221EC
-
-	thumb_func_start sub_812220C
-sub_812220C: @ 812220C
-	push {r4-r6,lr}
-	adds r6, r2, 0
-	ldr r2, [sp, 0x10]
-	lsls r1, 24
-	lsls r2, 24
-	lsrs r5, r2, 24
-	adds r4, r0, 0
-	movs r0, 0
-	strb r0, [r3]
-	movs r2, 0
-	lsrs r1, 24
-	cmp r2, r1
-	bcs _08122240
-_08122226:
-	lsls r0, r2, 2
-	adds r0, r4
-	ldrh r0, [r0]
-	cmp r0, 0
-	beq _08122236
-	ldrb r0, [r3]
-	adds r0, 0x1
-	strb r0, [r3]
-_08122236:
-	adds r0, r2, 0x1
-	lsls r0, 16
-	lsrs r2, r0, 16
-	cmp r2, r1
-	bcc _08122226
-_08122240:
-	ldrb r0, [r3]
-	adds r1, r0, 0x1
-	strb r1, [r3]
-	lsls r0, r1, 24
-	lsrs r0, 24
-	cmp r0, r5
-	bls _08122252
-	strb r5, [r6]
-	b _08122254
-_08122252:
-	strb r1, [r6]
-_08122254:
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_812220C
-
-	thumb_func_start sub_812225C
-sub_812225C: @ 812225C
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	adds r5, r1, 0
-	lsls r2, 24
-	lsrs r2, 24
-	lsls r3, 24
-	lsrs r3, 24
-	ldrh r0, [r4]
-	cmp r0, 0
-	beq _0812227A
-	adds r0, r2
-	cmp r0, r3
-	ble _0812227A
-	subs r0, r3, r2
-	strh r0, [r4]
-_0812227A:
-	ldrh r0, [r4]
-	ldrh r1, [r5]
-	adds r0, r1
-	cmp r0, r3
-	blt _08122290
-	cmp r3, 0
-	bne _0812228C
-	strh r3, [r5]
-	b _08122290
-_0812228C:
-	subs r0, r3, 0x1
-	strh r0, [r5]
-_08122290:
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_812225C
-
-	thumb_func_start sub_8122298
-sub_8122298: @ 8122298
-	push {r4-r7,lr}
-	adds r5, r0, 0
-	adds r4, r1, 0
-	ldr r0, [sp, 0x14]
-	lsls r2, 24
-	lsrs r7, r2, 24
-	lsls r3, 24
-	lsrs r6, r3, 24
-	lsls r2, r0, 24
-	lsrs r0, r2, 24
-	movs r1, 0x1
-	ands r0, r1
-	cmp r0, 0
-	beq _081222F0
-	lsrs r2, 25
-	ldrh r0, [r4]
-	cmp r0, r2
-	bcc _08122322
-	movs r1, 0
-	subs r0, r2
-	cmp r1, r0
-	bge _08122322
-	ldrh r0, [r5]
-	adds r0, r7
-	cmp r0, r6
-	beq _08122322
-_081222CC:
-	ldrh r0, [r4]
-	subs r0, 0x1
-	strh r0, [r4]
-	ldrh r0, [r5]
-	adds r0, 0x1
-	strh r0, [r5]
-	adds r0, r1, 0x1
-	lsls r0, 24
-	lsrs r1, r0, 24
-	ldrh r0, [r4]
-	subs r0, r2
-	cmp r1, r0
-	bge _08122322
-	ldrh r0, [r5]
-	adds r0, r7
-	cmp r0, r6
-	bne _081222CC
-	b _08122322
-_081222F0:
-	ldrh r3, [r4]
-	lsrs r2, 25
-	adds r0, r2, 0x1
-	cmp r3, r0
-	blt _08122322
-	movs r1, 0
-	subs r0, r3, r2
-	b _08122316
-_08122300:
-	ldrh r0, [r4]
-	subs r0, 0x1
-	strh r0, [r4]
-	ldrh r0, [r5]
-	adds r0, 0x1
-	strh r0, [r5]
-	adds r0, r1, 0x1
-	lsls r0, 24
-	lsrs r1, r0, 24
-	ldrh r0, [r4]
-	subs r0, r2
-_08122316:
-	cmp r1, r0
-	bgt _08122322
-	ldrh r0, [r5]
-	adds r0, r7
-	cmp r0, r6
-	bne _08122300
-_08122322:
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_8122298
-
-	thumb_func_start LoadListMenuArrowsGfx
-LoadListMenuArrowsGfx: @ 8122328
-	push {lr}
-	ldr r0, =gUnknown_0859F514
-	bl LoadCompressedObjectPic
-	ldr r0, =gUnknown_0859F51C
-	bl LoadCompressedObjectPalette
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end LoadListMenuArrowsGfx
 
 	thumb_func_start sub_8122344
 sub_8122344: @ 8122344
diff --git a/ld_script.txt b/ld_script.txt
index cf218af51..2aa273ac7 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -163,6 +163,7 @@ SECTIONS {
         src/mon_markings.o(.text);
         src/mauville_old_man.o(.text);
         src/mail.o(.text);
+        src/menu_helpers.o(.text);
         asm/menu_helpers.o(.text);
         src/dewford_trend.o(.text);
         src/heal_location.o(.text);
diff --git a/src/menu_helpers.c b/src/menu_helpers.c
new file mode 100644
index 000000000..8e8197a12
--- /dev/null
+++ b/src/menu_helpers.c
@@ -0,0 +1,400 @@
+#include "global.h"
+#include "task.h"
+#include "window.h"
+#include "menu.h"
+#include "menu_helpers.h"
+#include "gpu_regs.h"
+#include "bg.h"
+#include "main.h"
+#include "text.h"
+#include "link.h"
+#include "string_util.h"
+#include "sound.h"
+#include "mail.h"
+#include "overworld.h"
+#include "decompress.h"
+#include "constants/songs.h"
+#include "constants/items.h"
+#include "constants/maps.h"
+
+extern u8 gUnknown_0203A140;
+extern TaskFunc gUnknown_0300117C;
+extern struct YesNoFuncTable gUnknown_0203A138;
+
+extern const struct CompressedSpriteSheet gUnknown_0859F514;
+extern const struct CompressedSpritePalette gUnknown_0859F51C;
+
+extern bool32 InUnionRoom(void);
+extern bool32 sub_800B504(void);
+
+// this file's functions
+void Task_ContinueTaskAfterMessagePrints(u8 taskId);
+void Task_CallYesOrNoCallback(u8 taskId);
+
+// code
+void ResetVramOamAndBgCntRegs(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);
+    CpuFill16(0, (void*) VRAM, VRAM_SIZE);
+    CpuFill32(0, (void*) OAM, OAM_SIZE);
+    CpuFill16(0, (void*) PLTT, PLTT_SIZE);
+}
+
+void ResetAllBgsCoordinates(void)
+{
+    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);
+}
+
+void SetVBlankHBlankCallbacksToNull(void)
+{
+    SetVBlankCallback(NULL);
+    SetHBlankCallback(NULL);
+}
+
+void DisplayMessageAndContinueTask(u8 taskId, u8 windowId, u16 arg2, u8 arg3, u8 fontId, u8 textSpeed, const u8 *string, void *taskFunc)
+{
+    gUnknown_0203A140 = windowId;
+    sub_8197B1C(windowId, TRUE, arg2, arg3);
+
+    if (string != gStringVar4)
+        StringExpandPlaceholders(gStringVar4, string);
+
+    gTextFlags.flag_0 = 1;
+    AddTextPrinterParameterized(windowId, fontId, gStringVar4, textSpeed, NULL, 2, 1, 3);
+    gUnknown_0300117C = taskFunc;
+    gTasks[taskId].func = Task_ContinueTaskAfterMessagePrints;
+}
+
+bool16 RunTextPrintersRetIsActive(u8 textPrinterId)
+{
+    RunTextPrinters();
+    return IsTextPrinterActive(textPrinterId);
+}
+
+void Task_ContinueTaskAfterMessagePrints(u8 taskId)
+{
+    if (!RunTextPrintersRetIsActive(gUnknown_0203A140))
+        gUnknown_0300117C(taskId);
+}
+
+void sub_8121F68(u8 taskId, const struct YesNoFuncTable *data)
+{
+    gUnknown_0203A138 = *data;
+    gTasks[taskId].func = Task_CallYesOrNoCallback;
+}
+
+void CreateYesNoMenuWithCallbacks(u8 taskId, const struct WindowTemplate *template, u8 arg2, u8 arg3, u8 arg4, u16 tileStart, u8 palette, const struct YesNoFuncTable *yesNo)
+{
+    CreateYesNoMenu(template, tileStart, palette, 0);
+    gUnknown_0203A138 = *yesNo;
+    gTasks[taskId].func = Task_CallYesOrNoCallback;
+}
+
+void Task_CallYesOrNoCallback(u8 taskId)
+{
+    switch (ProcessMenuInputNoWrap_())
+    {
+    case 0:
+        PlaySE(SE_SELECT);
+        gUnknown_0203A138.yesFunc(taskId);
+        break;
+    case 1:
+    case MENU_B_PRESSED:
+        PlaySE(SE_SELECT);
+        gUnknown_0203A138.noFunc(taskId);
+        break;
+    }
+}
+
+bool8 AdjustQuantityAccordingToDPadInput(s16 *arg0, u16 arg1)
+{
+    s16 valBefore = (*arg0);
+
+    if ((gMain.newAndRepeatedKeys & DPAD_ANY) == DPAD_UP)
+    {
+        (*arg0)++;
+        if ((*arg0) > arg1)
+            (*arg0) = 1;
+
+        if ((*arg0) == valBefore)
+        {
+            return FALSE;
+        }
+        else
+        {
+            PlaySE(SE_SELECT);
+            return TRUE;
+        }
+    }
+    else if ((gMain.newAndRepeatedKeys & DPAD_ANY) == DPAD_DOWN)
+    {
+        (*arg0)--;
+        if ((*arg0) <= 0)
+            (*arg0) = arg1;
+
+        if ((*arg0) == valBefore)
+        {
+            return FALSE;
+        }
+        else
+        {
+            PlaySE(SE_SELECT);
+            return TRUE;
+        }
+    }
+    else if ((gMain.newAndRepeatedKeys & DPAD_ANY) == DPAD_RIGHT)
+    {
+        (*arg0) += 10;
+        if ((*arg0) > arg1)
+            (*arg0) = arg1;
+
+        if ((*arg0) == valBefore)
+        {
+            return FALSE;
+        }
+        else
+        {
+            PlaySE(SE_SELECT);
+            return TRUE;
+        }
+    }
+    else if ((gMain.newAndRepeatedKeys & 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 GetLRKeysState(void)
+{
+    if (gSaveBlock2Ptr->optionsButtonMode == OPTIONS_BUTTON_MODE_LR)
+    {
+        if (gMain.newKeys & L_BUTTON)
+            return 1;
+        if (gMain.newKeys & R_BUTTON)
+            return 2;
+    }
+
+    return 0;
+}
+
+u8 sub_812210C(void)
+{
+    if (gSaveBlock2Ptr->optionsButtonMode == OPTIONS_BUTTON_MODE_LR)
+    {
+        if (gMain.newAndRepeatedKeys & L_BUTTON)
+            return 1;
+        if (gMain.newAndRepeatedKeys & R_BUTTON)
+            return 2;
+    }
+
+    return 0;
+}
+
+bool8 sub_8122148(u16 itemId)
+{
+    if (itemId != ITEM_ENIGMA_BERRY)
+        return TRUE;
+    else if (gSaveBlock1Ptr->location.mapGroup == MAP_GROUP(TRADE_CENTER) && gSaveBlock1Ptr->location.mapNum == MAP_NUM(TRADE_CENTER))
+        return FALSE;
+    else if (InUnionRoom() != TRUE)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+bool8 itemid_80BF6D8_mail_related(u16 itemId)
+{
+    if (is_c1_link_related_active() != TRUE && InUnionRoom() != TRUE)
+        return TRUE;
+    else if (ItemIsMail(itemId) != TRUE)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+bool8 sub_81221AC(void)
+{
+    if (is_c1_link_related_active() == TRUE || gReceivedRemoteLinkPlayers == 1)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+static bool8 sub_81221D0(void)
+{
+    if (!sub_81221AC())
+        return FALSE;
+    else
+        return sub_8087598();
+}
+
+bool8 sub_81221EC(void)
+{
+    if (sub_81221D0() == TRUE)
+        return TRUE;
+    else if (sub_800B504() != TRUE)
+        return FALSE;
+    else
+        return TRUE;
+}
+
+void sub_812220C(struct ItemSlot *slots, u8 count, u8 *arg2, u8 *usedSlotsCount, u8 maxUsedSlotsCount)
+{
+    u16 i;
+    struct ItemSlot *slots_ = slots;
+
+    (*usedSlotsCount) = 0;
+    for (i = 0; i < count; i++)
+    {
+        if (slots_[i].itemId != ITEM_NONE)
+            (*usedSlotsCount)++;
+    }
+
+    (*usedSlotsCount)++;
+    if ((*usedSlotsCount) > maxUsedSlotsCount)
+        *arg2 = maxUsedSlotsCount;
+    else
+        *arg2 = (*usedSlotsCount);
+}
+
+void sub_812225C(u16 *arg0, u16 *arg1, u8 arg2, u8 arg3)
+{
+    if ((*arg0) != 0 && (*arg0) + arg2 > arg3)
+        (*arg0) = arg3 - arg2;
+
+    if ((*arg0) + (*arg1) >= arg3)
+    {
+        if (arg3 == 0)
+            (*arg1) = 0;
+        else
+            (*arg1) = arg3 - 1;
+    }
+}
+
+#ifdef NONMATCHING
+void sub_8122298(u16 *arg0, u16 *arg1, u8 arg2, u8 arg3, u8 arg4)
+{
+    if (arg2 & 1)
+    {
+
+    }
+    else
+    {
+
+    }
+}
+#else
+NAKED
+void sub_8122298(u16 *arg0, u16 *arg1, u8 arg2, u8 arg3, u8 arg4)
+{
+    asm_unified("\n\
+                	push {r4-r7,lr}\n\
+	adds r5, r0, 0\n\
+	adds r4, r1, 0\n\
+	ldr r0, [sp, 0x14]\n\
+	lsls r2, 24\n\
+	lsrs r7, r2, 24\n\
+	lsls r3, 24\n\
+	lsrs r6, r3, 24\n\
+	lsls r2, r0, 24\n\
+	lsrs r0, r2, 24\n\
+	movs r1, 0x1\n\
+	ands r0, r1\n\
+	cmp r0, 0\n\
+	beq _081222F0\n\
+	lsrs r2, 25\n\
+	ldrh r0, [r4]\n\
+	cmp r0, r2\n\
+	bcc _08122322\n\
+	movs r1, 0\n\
+	subs r0, r2\n\
+	cmp r1, r0\n\
+	bge _08122322\n\
+	ldrh r0, [r5]\n\
+	adds r0, r7\n\
+	cmp r0, r6\n\
+	beq _08122322\n\
+_081222CC:\n\
+	ldrh r0, [r4]\n\
+	subs r0, 0x1\n\
+	strh r0, [r4]\n\
+	ldrh r0, [r5]\n\
+	adds r0, 0x1\n\
+	strh r0, [r5]\n\
+	adds r0, r1, 0x1\n\
+	lsls r0, 24\n\
+	lsrs r1, r0, 24\n\
+	ldrh r0, [r4]\n\
+	subs r0, r2\n\
+	cmp r1, r0\n\
+	bge _08122322\n\
+	ldrh r0, [r5]\n\
+	adds r0, r7\n\
+	cmp r0, r6\n\
+	bne _081222CC\n\
+	b _08122322\n\
+_081222F0:\n\
+	ldrh r3, [r4]\n\
+	lsrs r2, 25\n\
+	adds r0, r2, 0x1\n\
+	cmp r3, r0\n\
+	blt _08122322\n\
+	movs r1, 0\n\
+	subs r0, r3, r2\n\
+	b _08122316\n\
+_08122300:\n\
+	ldrh r0, [r4]\n\
+	subs r0, 0x1\n\
+	strh r0, [r4]\n\
+	ldrh r0, [r5]\n\
+	adds r0, 0x1\n\
+	strh r0, [r5]\n\
+	adds r0, r1, 0x1\n\
+	lsls r0, 24\n\
+	lsrs r1, r0, 24\n\
+	ldrh r0, [r4]\n\
+	subs r0, r2\n\
+_08122316:\n\
+	cmp r1, r0\n\
+	bgt _08122322\n\
+	ldrh r0, [r5]\n\
+	adds r0, r7\n\
+	cmp r0, r6\n\
+	bne _08122300\n\
+_08122322:\n\
+	pop {r4-r7}\n\
+	pop {r0}\n\
+	bx r0");
+}
+#endif // NONMATCHING
+
+void LoadListMenuArrowsGfx(void)
+{
+    LoadCompressedObjectPic(&gUnknown_0859F514);
+    LoadCompressedObjectPalette(&gUnknown_0859F51C);
+}