decompile save_failed_screen.c except for two functions (#130)

* begin decompiling save_failed_screen.c

* add revision differences for sub_8146E50

* decompile sub_8147048

* help

* get sub_8147324 to almost match except for a single instruction

* finish decompiling save_failed_screen.c except for two nonmatching functions

6 files changed, 489 insertions, 792 deletions

diff --git a/asm/rom_813BA94.s b/asm/rom_813BA94.s
index 7e966cf91..d38466f97 100644
--- a/asm/rom_813BA94.s
+++ b/asm/rom_813BA94.s
@@ -14564,14 +14564,14 @@ _08143D24:
 	ldr r1, _08143DD0 @ =gReservedSpritePaletteCount
 	movs r0, 0x8
 	strb r0, [r1]
-	ldr r0, _08143DD4 @ =gUnknown_083F66F0
+	ldr r0, _08143DD4 @ =gBirchHelpGfx
 	movs r1, 0xC0
 	lsls r1, 19
 	bl LZ77UnCompVram
 	ldr r0, _08143DD8 @ =gBirchGrassTilemap
 	ldr r1, _08143DDC @ =0x06003800
 	bl LZ77UnCompVram
-	ldr r0, _08143DE0 @ =gUnknown_083F62EC + 0x2
+	ldr r0, _08143DE0 @ =gBirchBagGrassPal + 0x2
 	movs r1, 0x1
 	movs r2, 0x3E
 	bl LoadPalette
@@ -14640,10 +14640,10 @@ _08143D88:
 _08143DC8: .4byte gMain
 _08143DCC: .4byte 0x0000043c
 _08143DD0: .4byte gReservedSpritePaletteCount
-_08143DD4: .4byte gUnknown_083F66F0
+_08143DD4: .4byte gBirchHelpGfx
 _08143DD8: .4byte gBirchGrassTilemap
 _08143DDC: .4byte 0x06003800
-_08143DE0: .4byte gUnknown_083F62EC + 0x2
+_08143DE0: .4byte gBirchBagGrassPal + 0x2
 _08143DE4: .4byte 0x0201e000
 _08143DE8: .4byte 0x000007ff
 _08143DEC: .4byte 0x0201f800
diff --git a/asm/save_failed_screen.s b/asm/save_failed_screen.s
deleted file mode 100644
index a114bbea3..000000000
--- a/asm/save_failed_screen.s
+++ /dev/null
@@ -1,779 +0,0 @@
-	.include "constants/gba_constants.inc"
-	.include "constants/species_constants.inc"
-	.include "asm/macros.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start fullscreen_save_activate
-fullscreen_save_activate: @ 8146E10
-	push {r4,lr}
-	adds r4, r0, 0
-	lsls r4, 24
-	lsrs r4, 24
-	ldr r0, _08146E30 @ =sub_8146E50
-	bl SetMainCallback2
-	ldr r0, _08146E34 @ =gUnknown_0203933C
-	strh r4, [r0]
-	ldr r1, _08146E38 @ =gUnknown_0203933E
-	movs r0, 0
-	strh r0, [r1]
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08146E30: .4byte sub_8146E50
-_08146E34: .4byte gUnknown_0203933C
-_08146E38: .4byte gUnknown_0203933E
-	thumb_func_end fullscreen_save_activate
-
-	thumb_func_start sub_8146E3C
-sub_8146E3C: @ 8146E3C
-	push {lr}
-	bl LoadOam
-	bl ProcessSpriteCopyRequests
-	bl TransferPlttBuffer
-	pop {r0}
-	bx r0
-	thumb_func_end sub_8146E3C
-
-	thumb_func_start sub_8146E50
-sub_8146E50: @ 8146E50
-	push {r4-r7,lr}
-	mov r7, r9
-	mov r6, r8
-	push {r6,r7}
-	sub sp, 0xC
-	ldr r0, _08146FB0 @ =gMain
-	ldr r1, _08146FB4 @ =0x0000043c
-	adds r7, r0, r1
-	ldrb r0, [r7]
-	cmp r0, 0
-	beq _08146E6C
-	cmp r0, 0x1
-	bne _08146E6C
-	b _0814701C
-_08146E6C:
-	movs r0, 0
-	bl SetVBlankCallback
-	movs r0, 0x80
-	lsls r0, 19
-	mov r9, r0
-	movs r1, 0
-	strh r1, [r0]
-	ldr r6, _08146FB8 @ =REG_BG3CNT
-	strh r1, [r6]
-	adds r0, 0xC
-	mov r8, r0
-	strh r1, [r0]
-	subs r0, 0x2
-	strh r1, [r0]
-	ldr r5, _08146FBC @ =REG_BG0CNT
-	strh r1, [r5]
-	adds r0, 0x12
-	strh r1, [r0]
-	adds r0, 0x2
-	strh r1, [r0]
-	subs r0, 0x6
-	strh r1, [r0]
-	adds r0, 0x2
-	strh r1, [r0]
-	subs r0, 0x6
-	strh r1, [r0]
-	adds r0, 0x2
-	strh r1, [r0]
-	subs r0, 0x6
-	strh r1, [r0]
-	adds r0, 0x2
-	strh r1, [r0]
-	add r0, sp, 0x4
-	strh r1, [r0]
-	ldr r2, _08146FC0 @ =0x040000d4
-	str r0, [r2]
-	movs r1, 0xC0
-	lsls r1, 19
-	str r1, [r2, 0x4]
-	ldr r0, _08146FC4 @ =0x8100c000
-	str r0, [r2, 0x8]
-	ldr r0, [r2, 0x8]
-	movs r4, 0
-	str r4, [sp, 0x8]
-	add r0, sp, 0x8
-	str r0, [r2]
-	movs r0, 0xE0
-	lsls r0, 19
-	str r0, [r2, 0x4]
-	ldr r0, _08146FC8 @ =0x85000100
-	str r0, [r2, 0x8]
-	ldr r0, [r2, 0x8]
-	add r0, sp, 0x4
-	strh r4, [r0]
-	str r0, [r2]
-	movs r0, 0xA0
-	lsls r0, 19
-	str r0, [r2, 0x4]
-	ldr r0, _08146FCC @ =0x81000200
-	str r0, [r2, 0x8]
-	ldr r0, [r2, 0x8]
-	ldr r0, _08146FD0 @ =gUnknown_083F66F0
-	bl LZ77UnCompVram
-	ldr r0, _08146FD4 @ =gBirchBagTilemap
-	ldr r1, _08146FD8 @ =0x06003000
-	bl LZ77UnCompVram
-	ldr r0, _08146FDC @ =gBirchGrassTilemap
-	ldr r1, _08146FE0 @ =0x06003800
-	bl LZ77UnCompVram
-	ldr r0, _08146FE4 @ =gUnknown_08411980
-	ldr r1, _08146FE8 @ =0x06010020
-	bl LZ77UnCompVram
-	bl ResetSpriteData
-	bl ResetTasks
-	bl ResetPaletteFade
-	ldr r0, _08146FEC @ =gUnknown_083F62EC
-	movs r1, 0
-	movs r2, 0x40
-	bl LoadPalette
-	ldr r0, _08146FF0 @ =gUnknown_08411960
-	movs r1, 0x80
-	lsls r1, 1
-	movs r2, 0x20
-	bl LoadPalette
-	ldr r0, _08146FF4 @ =gWindowConfig_81E6C3C
-	bl SetUpWindowConfig
-	ldr r0, _08146FF8 @ =gWindowConfig_81E6CE4
-	bl InitMenuWindow
-	.if REVISION >= 1
-	movs r0, 0xD
-	movs r1, 0x6
-	movs r2, 0x10
-	movs r3, 0x9
-	.else
-	movs r0, 0xD
-	movs r1, 0x8
-	movs r2, 0x10
-	movs r3, 0xB
-	.endif
-	bl MenuDrawTextWindow
-	.if REVISION >= 1
-	movs r0, 0x1
-	movs r1, 0xA
-	movs r2, 0x1C
-	movs r3, 0x13
-	.else
-	movs r0, 0x1
-	movs r1, 0xC
-	movs r2, 0x1C
-	movs r3, 0x13
-	.endif
-	bl MenuDrawTextWindow
-	ldr r0, _08146FFC @ =gSystemText_SaveFailedBackupCheck
-	.if REVISION >= 1
-	movs r1, 0x2
-	movs r2, 0xB
-	.else
-	movs r1, 0x2
-	movs r2, 0xD
-	.endif
-	bl MenuPrint
-	movs r0, 0x1
-	negs r0, r0
-	str r4, [sp]
-	movs r1, 0
-	movs r2, 0x10
-	movs r3, 0
-	bl BeginNormalPaletteFade
-	ldr r3, _08147000 @ =0x04000208
-	ldrh r2, [r3]
-	strh r4, [r3]
-	ldr r4, _08147004 @ =0x04000200
-	ldrh r0, [r4]
-	movs r1, 0x1
-	orrs r0, r1
-	strh r0, [r4]
-	strh r2, [r3]
-	ldr r2, _08147008 @ =REG_DISPSTAT
-	ldrh r0, [r2]
-	movs r1, 0x8
-	orrs r0, r1
-	strh r0, [r2]
-	ldr r0, _0814700C @ =sub_8146E3C
-	bl SetVBlankCallback
-	ldr r1, _08147010 @ =0x00000703
-	adds r0, r1, 0
-	strh r0, [r6]
-	ldr r1, _08147014 @ =0x00000602
-	adds r0, r1, 0
-	mov r1, r8
-	strh r0, [r1]
-	ldr r1, _08147018 @ =0x00001f08
-	adds r0, r1, 0
-	strh r0, [r5]
-	movs r1, 0xEA
-	lsls r1, 5
-	adds r0, r1, 0
-	mov r1, r9
-	strh r0, [r1]
-	ldrb r0, [r7]
-	adds r0, 0x1
-	strb r0, [r7]
-	b _08147032
-	.align 2, 0
-_08146FB0: .4byte gMain
-_08146FB4: .4byte 0x0000043c
-_08146FB8: .4byte REG_BG3CNT
-_08146FBC: .4byte REG_BG0CNT
-_08146FC0: .4byte 0x040000d4
-_08146FC4: .4byte 0x8100c000
-_08146FC8: .4byte 0x85000100
-_08146FCC: .4byte 0x81000200
-_08146FD0: .4byte gUnknown_083F66F0
-_08146FD4: .4byte gBirchBagTilemap
-_08146FD8: .4byte 0x06003000
-_08146FDC: .4byte gBirchGrassTilemap
-_08146FE0: .4byte 0x06003800
-_08146FE4: .4byte gUnknown_08411980
-_08146FE8: .4byte 0x06010020
-_08146FEC: .4byte gUnknown_083F62EC
-_08146FF0: .4byte gUnknown_08411960
-_08146FF4: .4byte gWindowConfig_81E6C3C
-_08146FF8: .4byte gWindowConfig_81E6CE4
-_08146FFC: .4byte gSystemText_SaveFailedBackupCheck
-_08147000: .4byte 0x04000208
-_08147004: .4byte 0x04000200
-_08147008: .4byte REG_DISPSTAT
-_0814700C: .4byte sub_8146E3C
-_08147010: .4byte 0x00000703
-_08147014: .4byte 0x00000602
-_08147018: .4byte 0x00001f08
-_0814701C:
-	bl UpdatePaletteFade
-	lsls r0, 24
-	cmp r0, 0
-	bne _08147032
-	ldr r0, _08147040 @ =sub_8147048
-	bl SetMainCallback2
-	ldr r0, _08147044 @ =sub_8147218
-	bl SetVBlankCallback
-_08147032:
-	add sp, 0xC
-	pop {r3,r4}
-	mov r8, r3
-	mov r9, r4
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08147040: .4byte sub_8147048
-_08147044: .4byte sub_8147218
-	thumb_func_end sub_8146E50
-
-	thumb_func_start sub_8147048
-sub_8147048: @ 8147048
-	push {r4,r5,lr}
-	movs r4, 0
-	ldr r0, _081470C8 @ =gUnknown_0203933E
-	movs r1, 0x1
-	strh r1, [r0]
-	ldr r1, _081470CC @ =gUnknown_03005EA8
-	ldr r0, [r1]
-	cmp r0, 0
-	beq _081470A6
-	adds r5, r1, 0
-_0814705C:
-	ldr r0, [r5]
-	bl sub_814737C
-	lsls r0, 24
-	cmp r0, 0
-	bne _0814710C
-	.if REVISION >= 1
-	movs r0, 0x1
-	movs r1, 0xA
-	movs r2, 0x1C
-	movs r3, 0x13
-	.else
-	movs r0, 0x1
-	movs r1, 0xC
-	movs r2, 0x1C
-	movs r3, 0x13
-	.endif
-	bl MenuDrawTextWindow
-	ldr r0, _081470D0 @ =gSystemText_CheckCompleteSaveAttempt
-	.if REVISION >= 1
-	movs r1, 0x2
-	movs r2, 0xB
-	.else
-	movs r1, 0x2
-	movs r2, 0xD
-	.endif
-	bl MenuPrint
-	ldr r0, _081470D4 @ =gUnknown_0203933C
-	ldrb r0, [r0]
-	bl sub_8125C3C
-	ldr r0, [r5]
-	cmp r0, 0
-	beq _08147096
-	ldr r0, _081470D8 @ =gSystemText_SaveFailedBackupCheck
-	.if REVISION >= 1
-	movs r1, 0x2
-	movs r2, 0xB
-	.else
-	movs r1, 0x2
-	movs r2, 0xD
-	.endif
-	bl MenuPrint
-_08147096:
-	adds r0, r4, 0x1
-	lsls r0, 24
-	lsrs r4, r0, 24
-	ldr r0, [r5]
-	cmp r0, 0
-	beq _081470A6
-	cmp r4, 0x2
-	bls _0814705C
-_081470A6:
-	cmp r4, 0x3
-	bne _081470E4
-	.if REVISION >= 1
-	movs r0, 0x1
-	movs r1, 0xA
-	movs r2, 0x1C
-	movs r3, 0x13
-	.else
-	movs r0, 0x1
-	movs r1, 0xC
-	movs r2, 0x1C
-	movs r3, 0x13
-	.endif
-	bl MenuDrawTextWindow
-	ldr r0, _081470DC @ =gSystemText_BackupDamagedGameContinue
-	.if REVISION >= 1
-	movs r1, 0x2
-	movs r2, 0xB
-	.else
-	movs r1, 0x2
-	movs r2, 0xD
-	.endif
-	bl MenuPrint
-	ldr r0, _081470E0 @ =sub_81471A4
-	bl SetMainCallback2
-	b _0814713E
-	.align 2, 0
-_081470C8: .4byte gUnknown_0203933E
-_081470CC: .4byte gUnknown_03005EA8
-_081470D0: .4byte gSystemText_CheckCompleteSaveAttempt
-_081470D4: .4byte gUnknown_0203933C
-_081470D8: .4byte gSystemText_SaveFailedBackupCheck
-_081470DC: .4byte gSystemText_BackupDamagedGameContinue
-_081470E0: .4byte sub_81471A4
-_081470E4:
-	.if REVISION >= 1
-	movs r0, 0x1
-	movs r1, 0xA
-	movs r2, 0x1C
-	movs r3, 0x13
-	.else
-	movs r0, 0x1
-	movs r1, 0xC
-	movs r2, 0x1C
-	movs r3, 0x13
-	.endif
-	bl MenuDrawTextWindow
-	ldr r0, _08147104 @ =gUnknown_03005EBC
-	ldr r0, [r0]
-	cmp r0, 0
-	bne _08147134
-	ldr r0, _08147108 @ =gSystemText_SaveCompletedGameEnd
-	.if REVISION >= 1
-	movs r1, 0x2
-	movs r2, 0xB
-	.else
-	movs r1, 0x2
-	movs r2, 0xD
-	.endif
-	bl MenuPrint
-	b _0814713E
-	.align 2, 0
-_08147104: .4byte gUnknown_03005EBC
-_08147108: .4byte gSystemText_SaveCompletedGameEnd
-_0814710C:
-	.if REVISION >= 1
-	movs r0, 0x1
-	movs r1, 0xA
-	movs r2, 0x1C
-	movs r3, 0x13
-	.else
-	movs r0, 0x1
-	movs r1, 0xC
-	movs r2, 0x1C
-	movs r3, 0x13
-	.endif
-	bl MenuDrawTextWindow
-	ldr r0, _0814712C @ =gSystemText_BackupDamagedGameContinue
-	.if REVISION >= 1
-	movs r1, 0x2
-	movs r2, 0xB
-	.else
-	movs r1, 0x2
-	movs r2, 0xD
-	.endif
-	bl MenuPrint
-	ldr r0, _08147130 @ =sub_8147154
-	bl SetMainCallback2
-	b _08147144
-	.align 2, 0
-_0814712C: .4byte gSystemText_BackupDamagedGameContinue
-_08147130: .4byte sub_8147154
-_08147134:
-	ldr r0, _0814714C @ =gSystemText_SaveCompletedPressA
-	.if REVISION >= 1
-	movs r1, 0x2
-	movs r2, 0xB
-	.else
-	movs r1, 0x2
-	movs r2, 0xD
-	.endif
-	bl MenuPrint
-_0814713E:
-	ldr r0, _08147150 @ =sub_81471A4
-	bl SetMainCallback2
-_08147144:
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0814714C: .4byte gSystemText_SaveCompletedPressA
-_08147150: .4byte sub_81471A4
-	thumb_func_end sub_8147048
-
-	thumb_func_start sub_8147154
-sub_8147154: @ 8147154
-	push {lr}
-	ldr r1, _08147190 @ =gUnknown_0203933E
-	movs r0, 0
-	strh r0, [r1]
-	ldr r0, _08147194 @ =gMain
-	ldrh r1, [r0, 0x2E]
-	movs r0, 0x1
-	ands r0, r1
-	cmp r0, 0
-	beq _0814718A
-	.if REVISION >= 1
-	movs r0, 0x1
-	movs r1, 0xA
-	movs r2, 0x1C
-	movs r3, 0x13
-	.else
-	movs r0, 0x1
-	movs r1, 0xC
-	movs r2, 0x1C
-	movs r3, 0x13
-	.endif
-	bl MenuDrawTextWindow
-	ldr r0, _08147198 @ =gSystemText_GameplayEnded
-	.if REVISION >= 1
-	movs r1, 0x2
-	movs r2, 0xB
-	.else
-	movs r1, 0x2
-	movs r2, 0xD
-	.endif
-	bl MenuPrint
-	ldr r0, _0814719C @ =sub_8146E3C
-	bl SetVBlankCallback
-	ldr r0, _081471A0 @ =sub_81471A4
-	bl SetMainCallback2
-_0814718A:
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08147190: .4byte gUnknown_0203933E
-_08147194: .4byte gMain
-_08147198: .4byte gSystemText_GameplayEnded
-_0814719C: .4byte sub_8146E3C
-_081471A0: .4byte sub_81471A4
-	thumb_func_end sub_8147154
-
-	thumb_func_start sub_81471A4
-sub_81471A4: @ 81471A4
-	push {lr}
-	sub sp, 0x4
-	ldr r0, _081471DC @ =gUnknown_0203933E
-	movs r2, 0
-	strh r2, [r0]
-	ldr r0, _081471E0 @ =gMain
-	ldrh r1, [r0, 0x2E]
-	movs r0, 0x1
-	ands r0, r1
-	cmp r0, 0
-	beq _081471D4
-	movs r0, 0x1
-	negs r0, r0
-	str r2, [sp]
-	movs r1, 0
-	movs r3, 0x10
-	bl BeginNormalPaletteFade
-	ldr r0, _081471E4 @ =sub_8146E3C
-	bl SetVBlankCallback
-	ldr r0, _081471E8 @ =sub_81471EC
-	bl SetMainCallback2
-_081471D4:
-	add sp, 0x4
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081471DC: .4byte gUnknown_0203933E
-_081471E0: .4byte gMain
-_081471E4: .4byte sub_8146E3C
-_081471E8: .4byte sub_81471EC
-	thumb_func_end sub_81471A4
-
-	thumb_func_start sub_81471EC
-sub_81471EC: @ 81471EC
-	push {r4,r5,lr}
-	bl UpdatePaletteFade
-	lsls r0, 24
-	lsrs r4, r0, 24
-	cmp r4, 0
-	bne _08147212
-	ldr r5, _08147208 @ =gUnknown_03005EBC
-	ldr r0, [r5]
-	cmp r0, 0
-	bne _0814720C
-	bl DoSoftReset
-	b _08147212
-	.align 2, 0
-_08147208: .4byte gUnknown_03005EBC
-_0814720C:
-	bl SetMainCallback2
-	str r4, [r5]
-_08147212:
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_81471EC
-
-	thumb_func_start sub_8147218
-sub_8147218: @ 8147218
-	push {r4,r5,lr}
-	ldr r0, _08147290 @ =gMain
-	mov r12, r0
-	ldr r0, [r0, 0x24]
-	lsrs r4, r0, 3
-	movs r0, 0x7
-	ands r4, r0
-	ldr r0, _08147294 @ =gUnknown_08411940
-	ldr r1, [r0, 0x4]
-	ldr r0, [r0]
-	mov r2, r12
-	str r0, [r2, 0x3C]
-	str r1, [r2, 0x40]
-	ldrh r1, [r2, 0x3E]
-	ldr r0, _08147298 @ =0xfffffe00
-	ands r0, r1
-	movs r1, 0x70
-	orrs r0, r1
-	strh r0, [r2, 0x3E]
-	mov r1, r12
-	adds r1, 0x3C
-	.if REVISION >= 1
-	movs r0, 0x38
-	.else
-	movs r0, 0x48
-	.endif
-	strb r0, [r1]
-	ldr r0, _0814729C @ =gUnknown_0203933E
-	ldrh r0, [r0]
-	cmp r0, 0
-	beq _081472A8
-	ldr r3, _081472A0 @ =gUnknown_08411948
-	lsls r2, r4, 1
-	adds r2, r4
-	adds r0, r2, r3
-	mov r4, r12
-	adds r4, 0x40
-	ldrb r5, [r0]
-	ldrh r1, [r4]
-	ldr r0, _081472A4 @ =0xfffffc00
-	ands r0, r1
-	orrs r0, r5
-	strh r0, [r4]
-	adds r0, r3, 0x2
-	adds r0, r2, r0
-	ldrb r1, [r0]
-	lsls r1, 4
-	adds r3, 0x1
-	adds r2, r3
-	ldrb r0, [r2]
-	lsls r0, 3
-	orrs r1, r0
-	mov r3, r12
-	adds r3, 0x3F
-	movs r0, 0x1F
-	ands r1, r0
-	lsls r1, 1
-	ldrb r2, [r3]
-	movs r0, 0x3F
-	negs r0, r0
-	ands r0, r2
-	orrs r0, r1
-	strb r0, [r3]
-	b _081472B8
-	.align 2, 0
-_08147290: .4byte gMain
-_08147294: .4byte gUnknown_08411940
-_08147298: .4byte 0xfffffe00
-_0814729C: .4byte gUnknown_0203933E
-_081472A0: .4byte gUnknown_08411948
-_081472A4: .4byte 0xfffffc00
-_081472A8:
-	mov r2, r12
-	adds r2, 0x40
-	ldrh r1, [r2]
-	ldr r0, _081472D8 @ =0xfffffc00
-	ands r0, r1
-	movs r1, 0x1
-	orrs r0, r1
-	strh r0, [r2]
-_081472B8:
-	ldr r0, _081472DC @ =gMain + 0x3C
-	movs r1, 0xE0
-	lsls r1, 19
-	movs r2, 0x1
-	bl CpuFastSet
-	ldr r1, _081472E0 @ =gUnknown_0203933E
-	ldrh r0, [r1, 0x2]
-	cmp r0, 0
-	beq _081472D0
-	subs r0, 0x1
-	strh r0, [r1, 0x2]
-_081472D0:
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081472D8: .4byte 0xfffffc00
-_081472DC: .4byte gMain + 0x3C
-_081472E0: .4byte gUnknown_0203933E
-	thumb_func_end sub_8147218
-
-	thumb_func_start sub_81472E4
-sub_81472E4: @ 81472E4
-	push {r4,lr}
-	lsls r0, 16
-	lsrs r0, 16
-	ldr r4, _08147308 @ =0x02000000
-	movs r3, 0x80
-	lsls r3, 5
-	movs r1, 0
-	adds r2, r4, 0
-	bl ReadFlash
-	movs r1, 0
-	ldr r2, _0814730C @ =0x000003ff
-_081472FC:
-	ldr r0, [r4]
-	cmp r0, 0
-	beq _08147310
-	movs r0, 0x1
-	b _0814731E
-	.align 2, 0
-_08147308: .4byte 0x02000000
-_0814730C: .4byte 0x000003ff
-_08147310:
-	adds r0, r1, 0x1
-	lsls r0, 16
-	lsrs r1, r0, 16
-	adds r4, 0x4
-	cmp r1, r2
-	bls _081472FC
-	movs r0, 0
-_0814731E:
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81472E4
-
-	thumb_func_start sub_8147324
-sub_8147324: @ 8147324
-	push {r4-r7,lr}
-	mov r7, r8
-	push {r7}
-	lsls r0, 16
-	lsrs r6, r0, 16
-	movs r0, 0
-	ldr r1, _08147374 @ =0x00000fff
-	mov r8, r1
-	ldr r7, _08147378 @ =ProgramFlashByte
-_08147336:
-	movs r4, 0
-	adds r5, r0, 0x1
-_0814733A:
-	ldr r3, [r7]
-	adds r0, r6, 0
-	adds r1, r4, 0
-	movs r2, 0
-	bl _call_via_r3
-	adds r0, r4, 0x1
-	lsls r0, 16
-	lsrs r4, r0, 16
-	cmp r4, r8
-	bls _0814733A
-	adds r0, r6, 0
-	bl sub_81472E4
-	lsls r0, 24
-	lsrs r1, r0, 24
-	lsls r0, r5, 16
-	lsrs r0, 16
-	cmp r1, 0
-	beq _08147366
-	cmp r0, 0x81
-	bls _08147336
-_08147366:
-	adds r0, r1, 0
-	pop {r3}
-	mov r8, r3
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	.align 2, 0
-_08147374: .4byte 0x00000fff
-_08147378: .4byte ProgramFlashByte
-	thumb_func_end sub_8147324
-
-	thumb_func_start sub_814737C
-sub_814737C: @ 814737C
-	push {r4-r6,lr}
-	adds r5, r0, 0
-	movs r6, 0
-_08147382:
-	movs r4, 0x1
-	lsls r4, r6
-	adds r0, r5, 0
-	ands r0, r4
-	cmp r0, 0
-	beq _0814739C
-	adds r0, r6, 0
-	bl sub_8147324
-	lsls r0, 24
-	cmp r0, 0
-	bne _0814739C
-	bics r5, r4
-_0814739C:
-	adds r0, r6, 0x1
-	lsls r0, 16
-	lsrs r6, r0, 16
-	cmp r6, 0x1F
-	bls _08147382
-	cmp r5, 0
-	beq _081473AE
-	movs r0, 0x1
-	b _081473B0
-_081473AE:
-	movs r0, 0
-_081473B0:
-	pop {r4-r6}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_814737C
-
-	.align 2, 0 @ Don't pad with nop.
diff --git a/data/data2.s b/data/data2.s
index 129e3eee0..de7160a12 100644
--- a/data/data2.s
+++ b/data/data2.s
@@ -23970,7 +23970,8 @@ gTraderDecorations:: @ 83F62E8
 	.byte DECOR_TIRE
 	.byte DECOR_PRETTY_FLOWERS
 
-gUnknown_083F62EC:: @ 83F62EC
+	.align 2
+gBirchBagGrassPal:: @ 83F62EC
 	.incbin "graphics/misc/birch_bag.gbapal"
 	.incbin "graphics/misc/birch_grass.gbapal"
 
@@ -23990,7 +23991,8 @@ gBirchBagTilemap:: @ 83F636C
 gBirchGrassTilemap:: @ 83F64F8
 	.incbin "graphics/misc/birch_grass_map.bin.lz"
 
-gUnknown_083F66F0:: @ 83F66F0
+	.align 2
+gBirchHelpGfx:: @ 83F66F0
 	.incbin "graphics/misc/birch_help.4bpp.lz"
 
 	.align 2
@@ -30188,10 +30190,10 @@ gUnknown_08411940:: @ 8411940
 gUnknown_08411948:: @ 8411948
 	.incbin "baserom.gba", 0x00411948, 0x18
 
-gUnknown_08411960:: @ 8411960
+gSaveFailedClockPal:: @ 8411960
 	.incbin "graphics/misc/clock_small.gbapal"
 
-gUnknown_08411980:: @ 8411980
+gSaveFailedClockGfx:: @ 8411980
 	.incbin "graphics/misc/clock_small.4bpp.lz"
 
 @ 8411A10
diff --git a/ld_script.txt b/ld_script.txt
index f970dd23f..1292738a1 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -190,7 +190,7 @@ SECTIONS {
         src/diploma.o(.text);
         src/berry_tag_screen.o(.text);
         asm/mystery_event_menu.o(.text);
-        asm/save_failed_screen.o(.text);
+        src/save_failed_screen.o(.text);
         asm/rom_81473B8.o(.text);
         src/clear_save_data_menu.o(.text);
         asm/rom_8148B8C.o(.text);
diff --git a/src/save_failed_screen.c b/src/save_failed_screen.c
new file mode 100644
index 000000000..c35118858
--- /dev/null
+++ b/src/save_failed_screen.c
@@ -0,0 +1,474 @@
+#include "global.h"
+#include "main.h"
+#include "sprite.h"
+#include "palette.h"
+#include "task.h"
+#include "text.h"
+#include "menu.h"
+#include "save.h"
+#include "m4a.h"
+#include "gba/flash_internal.h"
+
+extern u8 unk_2000000[];
+
+extern u16 gUnknown_0203933C;
+extern u16 gUnknown_0203933E;
+extern u32 gUnknown_03005EA8;
+extern u32 gUnknown_03005EBC;
+
+extern u8 gBirchHelpGfx[];
+
+extern u8 gSystemText_SaveFailedBackupCheck[];
+extern u8 gSystemText_CheckCompleteSaveAttempt[];
+extern u8 gSystemText_BackupDamagedGameContinue[];
+extern u8 gSystemText_SaveCompletedPressA[];
+extern u8 gSystemText_SaveCompletedGameEnd[];
+extern u8 gSystemText_GameplayEnded[];
+
+extern u8 gBirchGrassTilemap[];
+extern u8 gBirchBagTilemap[];
+
+extern const u8 gSaveFailedClockGfx[];
+extern const u8 gSaveFailedClockPal[];
+extern u8 gBirchBagGrassPal[];
+
+void sub_8146E50(void);
+void sub_8147048(void);
+void sub_8147154(void);
+void sub_81471A4(void);
+void sub_81471EC(void);
+void sub_8147218(void);
+bool8 sub_814737C(u32);
+
+void fullscreen_save_activate(u8 var)
+{
+	SetMainCallback2(sub_8146E50);
+	gUnknown_0203933C = var;
+	gUnknown_0203933E = 0;
+}
+
+void sub_8146E3C(void)
+{
+	LoadOam();
+	ProcessSpriteCopyRequests();
+	TransferPlttBuffer();
+}
+
+void sub_8146E50(void)
+{
+	u16 ime;
+
+	switch(gMain.state)
+	{
+		case 0:
+		default:
+			SetVBlankCallback(0);
+			REG_DISPCNT = 0;
+			REG_BG3CNT = 0;
+			REG_BG2CNT = 0;
+			REG_BG1CNT = 0;
+			REG_BG0CNT = 0;
+			REG_BG3HOFS = 0;
+			REG_BG3VOFS = 0;
+			REG_BG2HOFS = 0;
+			REG_BG2VOFS = 0;
+			REG_BG1HOFS = 0;
+			REG_BG1VOFS = 0;
+			REG_BG0HOFS = 0;
+			REG_BG0VOFS = 0;
+			DmaFill16(3, 0, VRAM, VRAM_SIZE);
+			DmaFill32(3, 0, OAM, OAM_SIZE);
+			DmaFill16(3, 0, PLTT, PLTT_SIZE);
+			LZ77UnCompVram(&gBirchHelpGfx, (void *)VRAM);
+			LZ77UnCompVram(&gBirchBagTilemap, (void *)(VRAM + 0x3000));
+			LZ77UnCompVram(&gBirchGrassTilemap, (void *)(VRAM + 0x3800));
+			LZ77UnCompVram(&gSaveFailedClockGfx, (void *)(VRAM + 0x10020));
+			ResetSpriteData();
+			ResetTasks();
+			ResetPaletteFade();
+			LoadPalette(&gBirchBagGrassPal, 0, 0x40);
+			LoadPalette(&gSaveFailedClockPal, 0x100, 0x20);
+			SetUpWindowConfig(&gWindowConfig_81E6C3C);
+			InitMenuWindow(&gWindowConfig_81E6CE4);
+			// in revision 1.0, the text window is too small, causing text to overflow and create garbage. this is fixed in later revisions.
+#if (REVISION >= 1)
+			MenuDrawTextWindow(13, 6, 16, 9);
+			MenuDrawTextWindow(1, 10, 28, 19);
+			MenuPrint(gSystemText_SaveFailedBackupCheck, 2, 11);
+#else
+			MenuDrawTextWindow(13, 8, 16, 11);
+			MenuDrawTextWindow(1, 12, 28, 19);
+			MenuPrint(gSystemText_SaveFailedBackupCheck, 2, 13);
+#endif
+			BeginNormalPaletteFade(0xFFFFFFFF, 0, 16, 0, 0);
+			ime = REG_IME;
+			REG_IME = 0;
+			REG_IE |= INTR_FLAG_VBLANK;
+			REG_IME = ime;
+			REG_DISPSTAT |= DISPSTAT_VBLANK_INTR;
+			SetVBlankCallback(sub_8146E3C);
+			REG_BG3CNT = 0x703;
+			REG_BG2CNT = 0x602;
+			REG_BG0CNT = 0x1f08;
+			REG_DISPCNT = DISPCNT_OBJ_ON | DISPCNT_BG3_ON | DISPCNT_BG2_ON | DISPCNT_BG0_ON | DISPCNT_OBJ_1D_MAP | DISPCNT_MODE_0;
+			gMain.state++;
+			break;
+		case 1:
+			if(!UpdatePaletteFade())
+			{
+				SetMainCallback2(sub_8147048);
+				SetVBlankCallback(sub_8147218);
+			}
+			break;
+	}
+}
+
+void sub_8147048(void)
+{
+	u8 clockVal = 0;
+
+	gUnknown_0203933E = 1;
+	
+	if(gUnknown_03005EA8)
+	{
+		while(1) // _0814705C
+		{
+			if(!sub_814737C(gUnknown_03005EA8))
+			{
+			#if (REVISION >= 1)
+				MenuDrawTextWindow(1, 10, 28, 19);
+				MenuPrint(gSystemText_CheckCompleteSaveAttempt, 2, 11);
+			#else
+				MenuDrawTextWindow(1, 12, 28, 19);
+				MenuPrint(gSystemText_CheckCompleteSaveAttempt, 2, 13);
+			#endif
+				sub_8125C3C(gUnknown_0203933C);
+			
+				if(gUnknown_03005EA8)
+				#if (REVISION >= 1)
+					MenuPrint(gSystemText_SaveFailedBackupCheck, 2, 11);
+				#else
+					MenuPrint(gSystemText_SaveFailedBackupCheck, 2, 13);
+				#endif
+			
+				clockVal++;
+			
+				if(!gUnknown_03005EA8 || clockVal > 2)
+					break; // go to _081470A6
+
+				continue;
+			}
+			goto gotoLabel2;
+		}
+	}
+	if(clockVal == 3) // _081470A6
+	{
+	#if (REVISION >= 1)
+		MenuDrawTextWindow(1, 10, 28, 19);
+		MenuPrint(gSystemText_BackupDamagedGameContinue, 2, 11);
+	#else
+		MenuDrawTextWindow(1, 12, 28, 19);
+		MenuPrint(gSystemText_BackupDamagedGameContinue, 2, 13);
+	#endif
+		SetMainCallback2(sub_81471A4);
+		goto gotoLabel; // this calls sub_81471A4 for some reason.
+	}
+	else // _081470E4
+	{
+	#if (REVISION >= 1)
+		MenuDrawTextWindow(1, 10, 28, 19);
+	#else
+		MenuDrawTextWindow(1, 12, 28, 19);
+	#endif
+		
+		if(!gUnknown_03005EBC) // cant continue game.
+		{
+		#if (REVISION >= 1)
+			MenuPrint(gSystemText_SaveCompletedGameEnd, 2, 11);
+		#else
+			MenuPrint(gSystemText_SaveCompletedGameEnd, 2, 13);
+		#endif
+			goto gotoLabel;
+		}
+		else // can continue game.
+			goto gotoLabel3;
+	}
+	// no matter what I do, i can't get rid of these gotos. They were seemingly labeled at the end by the developer and jumped to manually depending on the result.
+gotoLabel2: // _0814710C
+#if (REVISION >= 1)
+	MenuDrawTextWindow(1, 10, 28, 19);
+	MenuPrint(gSystemText_BackupDamagedGameContinue, 2, 11);
+#else
+	MenuDrawTextWindow(1, 12, 28, 19);
+	MenuPrint(gSystemText_BackupDamagedGameContinue, 2, 13);
+#endif
+	SetMainCallback2(sub_8147154);
+	return;
+
+gotoLabel3:
+#if (REVISION >= 1)
+	MenuPrint(gSystemText_SaveCompletedPressA, 2, 11);
+#else
+	MenuPrint(gSystemText_SaveCompletedPressA, 2, 13);
+#endif
+
+gotoLabel: // _0814713E
+	SetMainCallback2(sub_81471A4); // seemingly called twice?
+}
+
+void sub_8147154(void)
+{
+	gUnknown_0203933E = 0;
+	
+	if(gMain.newKeys & A_BUTTON)
+	{
+	#if (REVISION >= 1)
+		MenuDrawTextWindow(1, 10, 28, 19);
+		MenuPrint(gSystemText_GameplayEnded, 2, 11);
+	#else
+		MenuDrawTextWindow(1, 12, 28, 19);
+		MenuPrint(gSystemText_GameplayEnded, 2, 13);
+	#endif
+		SetVBlankCallback(sub_8146E3C);
+		SetMainCallback2(sub_81471A4);
+	}
+}
+
+void sub_81471A4(void)
+{
+	u8 zero;
+
+	gUnknown_0203933E = zero = 0;
+	
+	if(gMain.newKeys & A_BUTTON)
+	{
+		BeginNormalPaletteFade(0xFFFFFFFF, 0, zero, 16, 0);
+		SetVBlankCallback(sub_8146E3C);
+		SetMainCallback2(sub_81471EC);
+	}
+}
+
+void sub_81471EC(void)
+{
+	if(!UpdatePaletteFade())
+	{
+		if(!gUnknown_03005EBC)
+			DoSoftReset();
+		else
+		{
+			SetMainCallback2((MainCallback)gUnknown_03005EBC);
+			gUnknown_03005EBC = 0;
+		}
+	}
+}
+
+// do later
+__attribute__((naked))
+void sub_8147218(void)
+{
+	asm(".syntax unified\n\
+	push {r4,r5,lr}\n\
+	ldr r0, _08147290 @ =gMain\n\
+	mov r12, r0\n\
+	ldr r0, [r0, 0x24]\n\
+	lsrs r4, r0, 3\n\
+	movs r0, 0x7\n\
+	ands r4, r0\n\
+	ldr r0, _08147294 @ =gUnknown_08411940\n\
+	ldr r1, [r0, 0x4]\n\
+	ldr r0, [r0]\n\
+	mov r2, r12\n\
+	str r0, [r2, 0x3C]\n\
+	str r1, [r2, 0x40]\n\
+	ldrh r1, [r2, 0x3E]\n\
+	ldr r0, _08147298 @ =0xfffffe00\n\
+	ands r0, r1\n\
+	movs r1, 0x70\n\
+	orrs r0, r1\n\
+	strh r0, [r2, 0x3E]\n\
+	mov r1, r12\n\
+	adds r1, 0x3C\n\
+	@.if REVISION >= 1\n\
+	@movs r0, 0x38\n\
+	@.else\n\
+	movs r0, 0x48\n\
+	@.endif\n\
+	strb r0, [r1]\n\
+	ldr r0, _0814729C @ =gUnknown_0203933E\n\
+	ldrh r0, [r0]\n\
+	cmp r0, 0\n\
+	beq _081472A8\n\
+	ldr r3, _081472A0 @ =gUnknown_08411948\n\
+	lsls r2, r4, 1\n\
+	adds r2, r4\n\
+	adds r0, r2, r3\n\
+	mov r4, r12\n\
+	adds r4, 0x40\n\
+	ldrb r5, [r0]\n\
+	ldrh r1, [r4]\n\
+	ldr r0, _081472A4 @ =0xfffffc00\n\
+	ands r0, r1\n\
+	orrs r0, r5\n\
+	strh r0, [r4]\n\
+	adds r0, r3, 0x2\n\
+	adds r0, r2, r0\n\
+	ldrb r1, [r0]\n\
+	lsls r1, 4\n\
+	adds r3, 0x1\n\
+	adds r2, r3\n\
+	ldrb r0, [r2]\n\
+	lsls r0, 3\n\
+	orrs r1, r0\n\
+	mov r3, r12\n\
+	adds r3, 0x3F\n\
+	movs r0, 0x1F\n\
+	ands r1, r0\n\
+	lsls r1, 1\n\
+	ldrb r2, [r3]\n\
+	movs r0, 0x3F\n\
+	negs r0, r0\n\
+	ands r0, r2\n\
+	orrs r0, r1\n\
+	strb r0, [r3]\n\
+	b _081472B8\n\
+	.align 2, 0\n\
+_08147290: .4byte gMain\n\
+_08147294: .4byte gUnknown_08411940\n\
+_08147298: .4byte 0xfffffe00\n\
+_0814729C: .4byte gUnknown_0203933E\n\
+_081472A0: .4byte gUnknown_08411948\n\
+_081472A4: .4byte 0xfffffc00\n\
+_081472A8:\n\
+	mov r2, r12\n\
+	adds r2, 0x40\n\
+	ldrh r1, [r2]\n\
+	ldr r0, _081472D8 @ =0xfffffc00\n\
+	ands r0, r1\n\
+	movs r1, 0x1\n\
+	orrs r0, r1\n\
+	strh r0, [r2]\n\
+_081472B8:\n\
+	ldr r0, _081472DC @ =gMain + 0x3C\n\
+	movs r1, 0xE0\n\
+	lsls r1, 19\n\
+	movs r2, 0x1\n\
+	bl CpuFastSet\n\
+	ldr r1, _081472E0 @ =gUnknown_0203933E\n\
+	ldrh r0, [r1, 0x2]\n\
+	cmp r0, 0\n\
+	beq _081472D0\n\
+	subs r0, 0x1\n\
+	strh r0, [r1, 0x2]\n\
+_081472D0:\n\
+	pop {r4,r5}\n\
+	pop {r0}\n\
+	bx r0\n\
+	.align 2, 0\n\
+_081472D8: .4byte 0xfffffc00\n\
+_081472DC: .4byte gMain + 0x3C\n\
+_081472E0: .4byte gUnknown_0203933E\n\
+	.syntax divided");
+}
+
+bool8 sub_81472E4(u16 var)
+{
+	u32 *ptr = unk_2000000;
+	u16 i;
+	
+	ReadFlash(var, 0, ptr, 4096);
+
+	for(i = 0; i < 0x400; i++, ptr++)
+		if(*ptr)
+			return TRUE;
+
+	return FALSE;
+}
+
+#ifdef NONMATCHING
+bool8 sub_8147324(u16 arg0) {
+    u16 i2;
+    u16 i;
+    bool8 success;
+
+    i = 0;
+    while (TRUE) {
+        u32 next;
+
+        i2 = 0;
+        next = i + 1;
+
+        for (; i2 < 0x1000; i2++) {
+            ProgramFlashByte(arg0, i2, 0);
+        }
+
+        if (!(success = sub_81472E4(arg0), (i = next)) || i >= 130) // matches except it checks r0 instead of r1. both are the same value, but the compiler prefers r1 for some reason.
+            break;
+    }
+
+    return success;
+}
+#else
+__attribute__((naked))
+bool8 sub_8147324(u16 arg0)
+{
+	asm(".syntax unified\n\
+	push {r4-r7,lr}\n\
+	mov r7, r8\n\
+	push {r7}\n\
+	lsls r0, 16\n\
+	lsrs r6, r0, 16\n\
+	movs r0, 0\n\
+	ldr r1, _08147374 @ =0x00000fff\n\
+	mov r8, r1\n\
+	ldr r7, _08147378 @ =ProgramFlashByte\n\
+_08147336:\n\
+	movs r4, 0\n\
+	adds r5, r0, 0x1\n\
+_0814733A:\n\
+	ldr r3, [r7]\n\
+	adds r0, r6, 0\n\
+	adds r1, r4, 0\n\
+	movs r2, 0\n\
+	bl _call_via_r3\n\
+	adds r0, r4, 0x1\n\
+	lsls r0, 16\n\
+	lsrs r4, r0, 16\n\
+	cmp r4, r8 @ compare i to var.\n\
+	bls _0814733A\n\
+	adds r0, r6, 0\n\
+	bl sub_81472E4\n\
+	lsls r0, 24\n\
+	lsrs r1, r0, 24\n\
+	lsls r0, r5, 16\n\
+	lsrs r0, 16\n\
+	cmp r1, 0\n\
+	beq _08147366\n\
+	cmp r0, 0x81\n\
+	bls _08147336\n\
+_08147366:\n\
+	adds r0, r1, 0 @ add var64 to the result from sub_81472E4(var)?\n\
+	pop {r3}\n\
+	mov r8, r3\n\
+	pop {r4-r7}\n\
+	pop {r1}\n\
+	bx r1\n\
+	.align 2, 0\n\
+_08147374: .4byte 0x00000fff\n\
+_08147378: .4byte ProgramFlashByte\n\
+	.syntax divided");
+}
+#endif
+
+bool8 sub_814737C(u32 var)
+{
+	u16 i;
+	
+	for(i = 0; i < 0x20; i++)
+		if(var & (1 << i) && !sub_8147324(i))
+			var &= ~(1 << i);
+
+	if(var == 0)
+		return FALSE;
+	else
+		return TRUE;
+}
diff --git a/src/starter_choose.c b/src/starter_choose.c
index 341f73e4c..2750705b8 100644
--- a/src/starter_choose.c
+++ b/src/starter_choose.c
@@ -20,12 +20,12 @@ struct MonCoords
 
 extern void * const gUnknown_081FAF4C[];
 extern const u8 gStarterChoose_PokeballCoords[][2];
-extern u8 gUnknown_083F66F0[];
+extern u8 gBirchHelpGfx[];
 extern u8 gBirchBagTilemap[];
 extern u8 gBirchGrassTilemap[];
 extern struct SpriteSheet gUnknown_083F7794;
 extern struct SpriteSheet gUnknown_083F77A4;
-extern u8 gUnknown_083F62EC[];
+extern u8 gBirchBagGrassPal[];
 extern const u8 gStarterChoose_LabelCoords[][2];
 extern u16 gStarterMons[];
 extern union AffineAnimCmd *gUnknown_083F778C[];
@@ -108,7 +108,7 @@ void CB2_ChooseStarter(void)
     DmaFill32(3, 0, OAM, OAM_SIZE);
     DmaFill16(3, 0, PLTT, PLTT_SIZE);
     
-    LZ77UnCompVram(&gUnknown_083F66F0, (void *)VRAM);
+    LZ77UnCompVram(&gBirchHelpGfx, (void *)VRAM);
     LZ77UnCompVram(&gBirchBagTilemap, (void *)(VRAM + 0x3000));
     LZ77UnCompVram(&gBirchGrassTilemap, (void *)(VRAM + 0x3800));
     remove_some_task();
@@ -116,7 +116,7 @@ void CB2_ChooseStarter(void)
     ResetSpriteData();
     ResetPaletteFade();
     FreeAllSpritePalettes();
-    LoadPalette(gUnknown_083F62EC, 0, 0x40);
+    LoadPalette(gBirchBagGrassPal, 0, 0x40);
     LoadCompressedObjectPic(&gUnknown_083F7794);
     LoadCompressedObjectPic(&gUnknown_083F77A4);
     LoadSpritePalettes(gUnknown_083F77B4);