decompile CTRDG_backup

11 files changed, 335 insertions, 321 deletions

diff --git a/arm9/asm/CTRDG_backup.s b/arm9/asm/CTRDG_backup.s
deleted file mode 100644
index e4c4baa4..00000000
--- a/arm9/asm/CTRDG_backup.s
+++ /dev/null
@@ -1,189 +0,0 @@
-	.include "asm/macros.inc"
-	.include "global.inc"
-
-	.extern AT29LV512_lib
-	.extern CTRDGi_EraseFlash4KBAT
-	.extern CTRDGi_EraseFlash4KBAsyncAT
-	.extern CTRDGi_EraseFlashChipAT
-	.extern CTRDGi_EraseFlashChipAsyncAT
-	.extern CTRDGi_EraseFlashChipAsyncLE
-	.extern CTRDGi_EraseFlashChipAsyncMX
-	.extern CTRDGi_EraseFlashChipLE
-	.extern CTRDGi_EraseFlashChipMX
-	.extern CTRDGi_EraseFlashSectorAT
-	.extern CTRDGi_EraseFlashSectorAsyncAT
-	.extern CTRDGi_EraseFlashSectorAsyncLE
-	.extern CTRDGi_EraseFlashSectorAsyncMX
-	.extern CTRDGi_EraseFlashSectorMX
-	.extern CTRDGi_PollingSR1MCOMMON
-	.extern CTRDGi_PollingSR512kCOMMON
-	.extern CTRDGi_WriteFlash4KBAT
-	.extern CTRDGi_WriteFlash4KBAsyncAT
-	.extern CTRDGi_WriteFlashSectorAT
-	.extern CTRDGi_WriteFlashSectorAsyncAT
-	.extern CTRDGi_WriteFlashSectorAsyncLE
-	.extern CTRDGi_WriteFlashSectorAsyncMX
-	.extern CTRDGi_WriteFlashSectorLE
-	.extern CTRDGi_WriteFlashSectorMX
-	.extern CTRDGi_WriteFlashSectorAsyncMX5
-	.extern CTRDGi_WriteFlashSectorMX5
-	.extern defaultFlash1M
-	.extern defaultFlash512
-	.extern LE26FV10N1TS_10
-	.extern LE39FW512
-	.extern MN63F805MNP
-	.extern MX29L010
-	.extern UNK_021D6B14
-	.extern UNK_021D6B30
-	.extern UNK_021D6B28
-	.extern UNK_021D6B1C
-	.extern UNK_021D6B24
-	.extern UNK_021D6B20
-	.extern UNK_021D6B0C
-	.extern UNK_021D6B34
-	.extern UNK_021D6B2C
-	.extern UNK_021D6B4C
-	.extern UNK_021D6B18
-
-	.section .rodata
-
-	.global UNK_02103FE4
-UNK_02103FE4: ; 0x02103FE4
-	.byte 0x14, 0x00, 0x00, 0x00
-
-	.global UNK_02103FE8
-UNK_02103FE8: ; 0x02103FE8
-	.word MX29L010
-	.word LE26FV10N1TS_10
-	.word defaultFlash1M
-
-	.global UNK_02103FF4
-UNK_02103FF4: ; 0x02103FF4
-	.word LE39FW512
-	.word AT29LV512_lib
-	.word MN63F805MNP
-	.word defaultFlash512
-
-	.section .bss
-
-    .text
-
-	arm_func_start CTRDG_IdentifyAgbBackup
-CTRDG_IdentifyAgbBackup: ; 0x020DBD50
-	stmdb sp!, {r4-r7,lr}
-	sub sp, sp, #0x4
-	mov r7, r0
-	cmp r7, #0x1
-	mov r0, #0x1
-	bhi _020DBEAC
-	bl OS_GetLockID
-	ldr r1, _020DBED8 ; =UNK_021D6B0C
-	strh r0, [r1, #0x0]
-	ldrh r0, [r1, #0x0]
-	bl OS_LockCartridge
-	ldr r6, _020DBEDC ; =0x04000204
-	ldr r1, _020DBEE0 ; =UNK_02103FE4
-	ldrh r3, [r6, #0x0]
-	ldrh r2, [r6, #0x0]
-	ldr r0, _020DBEE4 ; =UNK_021D6B28
-	and r4, r3, #0x3
-	bic r2, r2, #0x3
-	orr r2, r2, #0x3
-	strh r2, [r6, #0x0]
-	str r1, [r0, #0x0]
-	bl CTRDGi_ReadFlashID
-	ldr r2, _020DBEDC ; =0x04000204
-	mov r6, r0
-	ldrh r1, [r2, #0x0]
-	cmp r7, #0x0
-	ldreq r5, _020DBEE8 ; =UNK_02103FF4
-	bic r1, r1, #0x3
-	orr r1, r1, r4
-	cmp r7, #0x1
-	ldr r0, _020DBED8 ; =UNK_021D6B0C
-	strh r1, [r2, #0x0]
-	ldrh r0, [r0, #0x0]
-	ldreq r5, _020DBEEC ; =UNK_02103FE8
-	bl OS_UnlockCartridge
-	ldr r2, [r5, #0x0]
-	mov r0, #0x1
-	ldrh r1, [r2, #0x38]
-	cmp r1, #0x0
-	beq _020DBE14
-	and r3, r6, #0xff
-_020DBDF4:
-	ldrh r1, [r2, #0x38]
-	cmp r3, r1
-	moveq r0, #0x0
-	beq _020DBE14
-	ldr r2, [r5, #0x4]!
-	ldrh r1, [r2, #0x38]
-	cmp r1, #0x0
-	bne _020DBDF4
-_020DBE14:
-	ldr r2, [r2, #0x0]
-	ldr r1, _020DBEF0 ; =UNK_021D6B14
-	ldr r3, _020DBEF4 ; =UNK_021D6B34
-	str r2, [r1, #0x0]
-	ldr r1, [r5, #0x0]
-	ldr r2, _020DBEF8 ; =UNK_021D6B2C
-	ldr r4, [r1, #0x4]
-	ldr r1, _020DBEFC ; =UNK_021D6B18
-	str r4, [r3, #0x0]
-	ldr r3, [r5, #0x0]
-	ldr r6, _020DBF00 ; =UNK_021D6B1C
-	ldr r3, [r3, #0x8]
-	ldr r4, _020DBF04 ; =UNK_021D6B30
-	str r3, [r2, #0x0]
-	ldr r2, [r5, #0x0]
-	ldr r3, _020DBF08 ; =UNK_021D6B24
-	ldr r7, [r2, #0xc]
-	ldr r2, _020DBEE4 ; =UNK_021D6B28
-	str r7, [r1, #0x0]
-	ldr r7, [r5, #0x0]
-	ldr r1, _020DBF0C ; =UNK_021D6B20
-	ldr r7, [r7, #0x10]
-	add sp, sp, #0x4
-	str r7, [r6, #0x0]
-	ldr r6, [r5, #0x0]
-	ldr r6, [r6, #0x14]
-	str r6, [r4, #0x0]
-	ldr r4, [r5, #0x0]
-	ldr r4, [r4, #0x18]
-	str r4, [r3, #0x0]
-	ldr r3, [r5, #0x0]
-	ldr r3, [r3, #0x1c]
-	str r3, [r2, #0x0]
-	ldr r2, [r5, #0x0]
-	add r2, r2, #0x20
-	str r2, [r1, #0x0]
-	ldmia sp!, {r4-r7,lr}
-	bx lr
-_020DBEAC:
-	cmp r7, #0x2
-	addne sp, sp, #0x4
-	ldmneia sp!, {r4-r7,lr}
-	bxne lr
-	bl OS_GetLockID
-	ldr r1, _020DBF10 ; =UNK_021D6B4C
-	strh r0, [r1, #0x0]
-	mov r0, #0x0
-	add sp, sp, #0x4
-	ldmia sp!, {r4-r7,lr}
-	bx lr
-	.balign 4
-_020DBED8: .word UNK_021D6B0C
-_020DBEDC: .word 0x04000204
-_020DBEE0: .word UNK_02103FE4
-_020DBEE4: .word UNK_021D6B28
-_020DBEE8: .word UNK_02103FF4
-_020DBEEC: .word UNK_02103FE8
-_020DBEF0: .word UNK_021D6B14
-_020DBEF4: .word UNK_021D6B34
-_020DBEF8: .word UNK_021D6B2C
-_020DBEFC: .word UNK_021D6B18
-_020DBF00: .word UNK_021D6B1C
-_020DBF04: .word UNK_021D6B30
-_020DBF08: .word UNK_021D6B24
-_020DBF0C: .word UNK_021D6B20
-_020DBF10: .word UNK_021D6B4C
diff --git a/arm9/asm/CTRDG_flash_AT29LV512.s b/arm9/asm/CTRDG_flash_AT29LV512.s
index ff80e947..24b2e0f2 100644
--- a/arm9/asm/CTRDG_flash_AT29LV512.s
+++ b/arm9/asm/CTRDG_flash_AT29LV512.s
@@ -2,9 +2,9 @@
 	.include "global.inc"
 
 	.extern CTRDGi_PollingSR512kCOMMON
-	.extern UNK_021D6B20
-	.extern UNK_021D6B24
-	.extern UNK_021D6B0C
+	.extern AgbFlash
+	.extern CTRDGi_PollingSR
+	.extern ctrdgi_flash_lock_id
 	.extern UNK_021D6B38
 	.extern UNK_021D6B08
 
@@ -259,14 +259,14 @@ CTRDGi_WriteFlashSectorCoreAT: ; 0x020DC86C
 	stmia r4!, {r0-r3}
 	ldmia r5!, {r0-r3}
 	stmia r4!, {r0-r3}
-	ldr r0, _020DC984 ; =UNK_021D6B0C
+	ldr r0, _020DC984 ; =ctrdgi_flash_lock_id
 	ldr r1, [r5, #0x0]
 	ldrh r0, [r0, #0x0]
 	str r1, [r4, #0x0]
 	ldr r4, [sp, #0xc]
 	bl OS_LockCartridge
 	ldr r5, _020DC988 ; =0x04000204
-	ldr r1, _020DC98C ; =UNK_021D6B20
+	ldr r1, _020DC98C ; =AgbFlash
 	ldrh r0, [r5, #0x0]
 	ldr r1, [r1, #0x0]
 	ldrh r2, [r5, #0x0]
@@ -302,7 +302,7 @@ _020DC91C:
 	bne _020DC91C
 _020DC92C:
 	ldr ip, _020DC994 ; =0x04000208
-	ldr r3, _020DC9A0 ; =UNK_021D6B24
+	ldr r3, _020DC9A0 ; =CTRDGi_PollingSR
 	ldrh r0, [r12, #0x0]
 	sub r1, r1, #0x1
 	mov r0, #0x1
@@ -311,7 +311,7 @@ _020DC92C:
 	ldr r3, [r3, #0x0]
 	blx r3
 	ldr r3, _020DC988 ; =0x04000204
-	ldr r1, _020DC984 ; =UNK_021D6B0C
+	ldr r1, _020DC984 ; =ctrdgi_flash_lock_id
 	ldrh r2, [r3, #0x0]
 	mov r4, r0
 	bic r0, r2, #0x3
@@ -324,14 +324,14 @@ _020DC92C:
 	ldmia sp!, {r4-r5,lr}
 	bx lr
 	.balign 4
-_020DC984: .word UNK_021D6B0C
+_020DC984: .word ctrdgi_flash_lock_id
 _020DC988: .word 0x04000204
-_020DC98C: .word UNK_021D6B20
+_020DC98C: .word AgbFlash
 _020DC990: .word AT29LV512_org
 _020DC994: .word 0x04000208
 _020DC998: .word 0x0A005555
 _020DC99C: .word 0x0A002AAA
-_020DC9A0: .word UNK_021D6B24
+_020DC9A0: .word CTRDGi_PollingSR
 
 	arm_func_start CTRDGi_EraseFlash4KBCoreAT
 CTRDGi_EraseFlash4KBCoreAT: ; 0x020DC9A4
@@ -399,7 +399,7 @@ CTRDGi_EraseFlashSectorCoreAT: ; 0x020DCA58
 	ldr r0, [r5, #0x0]
 	ldr r1, _020DCB80 ; =AT29LV512_org
 	str r0, [r4, #0x0]
-	ldr r0, _020DCB84 ; =UNK_021D6B0C
+	ldr r0, _020DCB84 ; =ctrdgi_flash_lock_id
 	ldrh r2, [sp, #0x20]
 	ldrh r1, [r1, #0x28]
 	ldrh r0, [r0, #0x0]
@@ -407,7 +407,7 @@ CTRDGi_EraseFlashSectorCoreAT: ; 0x020DCA58
 	add r5, r1, #0xa000000
 	bl OS_LockCartridge
 	ldr r4, _020DCB88 ; =0x04000204
-	ldr r1, _020DCB8C ; =UNK_021D6B20
+	ldr r1, _020DCB8C ; =AgbFlash
 	ldrh r0, [r4, #0x0]
 	ldr r2, [r1, #0x0]
 	ldrh r1, [r4, #0x0]
@@ -439,7 +439,7 @@ _020DCB0C:
 	bne _020DCB0C
 _020DCB18:
 	ldr ip, _020DCB90 ; =0x04000208
-	ldr r3, _020DCB9C ; =UNK_021D6B24
+	ldr r3, _020DCB9C ; =CTRDGi_PollingSR
 	ldrh r0, [r12, #0x0]
 	sub r1, r5, #0x1
 	strh r2, [r12, #0x0]
@@ -456,7 +456,7 @@ _020DCB18:
 	bic r1, r1, #0x3
 	movne r5, r0, lsr #0x10
 	orr r1, r1, r4
-	ldr r0, _020DCB84 ; =UNK_021D6B0C
+	ldr r0, _020DCB84 ; =ctrdgi_flash_lock_id
 	strh r1, [r2, #0x0]
 	ldrh r0, [r0, #0x0]
 	bl OS_UnlockCartridge
@@ -466,23 +466,23 @@ _020DCB18:
 	bx lr
 	.balign 4
 _020DCB80: .word AT29LV512_org
-_020DCB84: .word UNK_021D6B0C
+_020DCB84: .word ctrdgi_flash_lock_id
 _020DCB88: .word 0x04000204
-_020DCB8C: .word UNK_021D6B20
+_020DCB8C: .word AgbFlash
 _020DCB90: .word 0x04000208
 _020DCB94: .word 0x0A005555
 _020DCB98: .word 0x0A002AAA
-_020DCB9C: .word UNK_021D6B24
+_020DCB9C: .word CTRDGi_PollingSR
 
 	arm_func_start CTRDGi_EraseFlashChipCoreAT
 CTRDGi_EraseFlashChipCoreAT: ; 0x020DCBA0
 	stmdb sp!, {r4-r5,lr}
 	sub sp, sp, #0x4
-	ldr r0, _020DCC7C ; =UNK_021D6B0C
+	ldr r0, _020DCC7C ; =ctrdgi_flash_lock_id
 	ldrh r0, [r0, #0x0]
 	bl OS_LockCartridge
 	ldr r4, _020DCC80 ; =0x04000204
-	ldr r0, _020DCC84 ; =UNK_021D6B20
+	ldr r0, _020DCC84 ; =AgbFlash
 	ldrh r3, [r4, #0x0]
 	ldr r0, [r0, #0x0]
 	ldrh r1, [r4, #0x0]
@@ -510,7 +510,7 @@ CTRDGi_EraseFlashChipCoreAT: ; 0x020DCBA0
 	strb r2, [lr, #0x0]
 	ldrh r2, [r0, #0x0]
 	ldr r2, [r1, #0x0]
-	ldr r1, _020DCC98 ; =UNK_021D6B24
+	ldr r1, _020DCC98 ; =CTRDGi_PollingSR
 	strh r2, [r0, #0x0]
 	ldr r4, [r1, #0x0]
 	mov r0, #0x3
@@ -519,7 +519,7 @@ CTRDGi_EraseFlashChipCoreAT: ; 0x020DCBA0
 	and r5, r3, #0x3
 	blx r4
 	ldr r3, _020DCC80 ; =0x04000204
-	ldr r1, _020DCC7C ; =UNK_021D6B0C
+	ldr r1, _020DCC7C ; =ctrdgi_flash_lock_id
 	ldrh r2, [r3, #0x0]
 	mov r4, r0
 	bic r0, r2, #0x3
@@ -532,11 +532,11 @@ CTRDGi_EraseFlashChipCoreAT: ; 0x020DCBA0
 	ldmia sp!, {r4-r5,lr}
 	bx lr
 	.balign 4
-_020DCC7C: .word UNK_021D6B0C
+_020DCC7C: .word ctrdgi_flash_lock_id
 _020DCC80: .word 0x04000204
-_020DCC84: .word UNK_021D6B20
+_020DCC84: .word AgbFlash
 _020DCC88: .word 0x04000208
 _020DCC8C: .word UNK_021D6B38
 _020DCC90: .word 0x0A005555
 _020DCC94: .word 0x0A002AAA
-_020DCC98: .word UNK_021D6B24
+_020DCC98: .word CTRDGi_PollingSR
diff --git a/arm9/asm/CTRDG_flash_LE39FW512.s b/arm9/asm/CTRDG_flash_LE39FW512.s
index b3f4b8a3..3228818d 100644
--- a/arm9/asm/CTRDG_flash_LE39FW512.s
+++ b/arm9/asm/CTRDG_flash_LE39FW512.s
@@ -2,9 +2,9 @@
 	.include "global.inc"
 
 	.extern CTRDGi_PollingSR512kCOMMON
-	.extern UNK_021D6B20
-	.extern UNK_021D6B24
-	.extern UNK_021D6B0C
+	.extern AgbFlash
+	.extern CTRDGi_PollingSR
+	.extern ctrdgi_flash_lock_id
 	.extern UNK_021D6B38
 	.extern UNK_021D6B08
 
@@ -128,13 +128,13 @@ CTRDGi_EraseFlashChipLE: ; 0x020DCD70
 	arm_func_start CTRDGi_VerifyFlashErase
 CTRDGi_VerifyFlashErase: ; 0x020DCD94
 	stmdb sp!, {r4-r6,lr}
-	ldr r2, _020DCE14 ; =UNK_021D6B0C
+	ldr r2, _020DCE14 ; =ctrdgi_flash_lock_id
 	mov r4, r0
 	ldrh r0, [r2, #0x0]
 	mov r5, r1
 	bl OS_LockCartridge
 	ldr ip, _020DCE18 ; =0x04000204
-	ldr r0, _020DCE1C ; =UNK_021D6B20
+	ldr r0, _020DCE1C ; =AgbFlash
 	ldrh r3, [r12, #0x0]
 	ldr r0, [r0, #0x0]
 	ldrh r1, [r12, #0x0]
@@ -148,7 +148,7 @@ CTRDGi_VerifyFlashErase: ; 0x020DCD94
 	blx r5
 	cmp r0, #0x0
 	ldr r2, _020DCE18 ; =0x04000204
-	ldr r0, _020DCE14 ; =UNK_021D6B0C
+	ldr r0, _020DCE14 ; =ctrdgi_flash_lock_id
 	ldrh r1, [r2, #0x0]
 	ldrne r4, _020DCE20 ; =0x00008004
 	bic r1, r1, #0x3
@@ -160,14 +160,14 @@ CTRDGi_VerifyFlashErase: ; 0x020DCD94
 	ldmia sp!, {r4-r6,lr}
 	bx lr
 	.balign 4
-_020DCE14: .word UNK_021D6B0C
+_020DCE14: .word ctrdgi_flash_lock_id
 _020DCE18: .word 0x04000204
-_020DCE1C: .word UNK_021D6B20
+_020DCE1C: .word AgbFlash
 _020DCE20: .word 0x00008004
 
 	arm_func_start CTRDGi_VerifyFlashCoreFF
 CTRDGi_VerifyFlashCoreFF: ; 0x020DCE24
-	ldr r1, _020DCE54 ; =UNK_021D6B20
+	ldr r1, _020DCE54 ; =AgbFlash
 	ldr r1, [r1, #0x0]
 	ldr r2, [r1, #0x4]
 	cmp r2, #0x0
@@ -182,7 +182,7 @@ _020DCE4C:
 	mov r0, r2
 	bx lr
 	.balign 4
-_020DCE54: .word UNK_021D6B20
+_020DCE54: .word AgbFlash
 
 	arm_func_start CTRDGi_WriteFlashSectorCoreLE
 CTRDGi_WriteFlashSectorCoreLE: ; 0x020DCE58
@@ -203,7 +203,7 @@ CTRDGi_WriteFlashSectorCoreLE: ; 0x020DCE58
 	ldrhs r0, _020DD018 ; =0x000080FF
 	ldmcsia sp!, {r4-r9,lr}
 	bxcs lr
-	ldr r0, _020DD01C ; =UNK_021D6B20
+	ldr r0, _020DD01C ; =AgbFlash
 	mov r9, #0x0
 	ldr r0, [r0, #0x0]
 	ldrh r0, [r0, #0x8]
@@ -247,11 +247,11 @@ _020DCF1C:
 	cmp r9, r5
 	bls _020DCF1C
 _020DCF38:
-	ldr r0, _020DD024 ; =UNK_021D6B0C
+	ldr r0, _020DD024 ; =ctrdgi_flash_lock_id
 	ldrh r0, [r0, #0x0]
 	bl OS_LockCartridge
 	ldr r5, _020DD028 ; =0x04000204
-	ldr r1, _020DD01C ; =UNK_021D6B20
+	ldr r1, _020DD01C ; =AgbFlash
 	ldrh r0, [r5, #0x0]
 	ldr r3, [r1, #0x0]
 	ldrh r2, [r5, #0x0]
@@ -295,7 +295,7 @@ _020DCFD4:
 	ldr r2, _020DD028 ; =0x04000204
 	strh r0, [r3, #0x0]
 	ldrh r1, [r2, #0x0]
-	ldr r0, _020DD024 ; =UNK_021D6B0C
+	ldr r0, _020DD024 ; =ctrdgi_flash_lock_id
 	bic r1, r1, #0x3
 	orr r1, r1, r5
 	strh r1, [r2, #0x0]
@@ -307,9 +307,9 @@ _020DCFD4:
 	bx lr
 	.balign 4
 _020DD018: .word 0x000080FF
-_020DD01C: .word UNK_021D6B20
+_020DD01C: .word AgbFlash
 _020DD020: .word CTRDGi_VerifyFlashCoreFF
-_020DD024: .word UNK_021D6B0C
+_020DD024: .word ctrdgi_flash_lock_id
 _020DD028: .word 0x04000204
 _020DD02C: .word UNK_021D6B08
 _020DD030: .word 0x04000208
@@ -329,7 +329,7 @@ CTRDGi_ProgramFlashByteLE: ; 0x020DD038
 	mov r0, #0xa0
 	strb r0, [r12, #0x0]
 	ldrb r2, [lr, #0x0]
-	ldr r3, _020DD094 ; =UNK_021D6B24
+	ldr r3, _020DD094 ; =CTRDGi_PollingSR
 	mov r0, #0x1
 	strb r2, [r1, #0x0]
 	ldrb r2, [lr, #0x0]
@@ -341,7 +341,7 @@ CTRDGi_ProgramFlashByteLE: ; 0x020DD038
 	.balign 4
 _020DD08C: .word 0x0A005555
 _020DD090: .word 0x0A002AAA
-_020DD094: .word UNK_021D6B24
+_020DD094: .word CTRDGi_PollingSR
 
 	arm_func_start CTRDGi_EraseFlashSectorCoreLE
 CTRDGi_EraseFlashSectorCoreLE: ; 0x020DD098
@@ -361,11 +361,11 @@ CTRDGi_EraseFlashSectorCoreLE: ; 0x020DD098
 	ldrhs r0, _020DD1B8 ; =0x000080FF
 	ldmcsia sp!, {r4-r6,lr}
 	bxcs lr
-	ldr r0, _020DD1BC ; =UNK_021D6B0C
+	ldr r0, _020DD1BC ; =ctrdgi_flash_lock_id
 	ldrh r0, [r0, #0x0]
 	bl OS_LockCartridge
 	ldr r6, _020DD1C0 ; =0x04000204
-	ldr r1, _020DD1C4 ; =UNK_021D6B20
+	ldr r1, _020DD1C4 ; =AgbFlash
 	ldrh r3, [r6, #0x0]
 	ldr r0, [r1, #0x0]
 	ldrh r2, [r6, #0x0]
@@ -397,7 +397,7 @@ CTRDGi_EraseFlashSectorCoreLE: ; 0x020DD098
 	strb r4, [r1, #0x0]
 	ldrh r4, [r0, #0x0]
 	ldr r4, [r2, #0x0]
-	ldr r2, _020DD1D8 ; =UNK_021D6B24
+	ldr r2, _020DD1D8 ; =CTRDGi_PollingSR
 	strh r4, [r0, #0x0]
 	ldr r4, [r2, #0x0]
 	mov r0, #0x2
@@ -405,7 +405,7 @@ CTRDGi_EraseFlashSectorCoreLE: ; 0x020DD098
 	and r5, r3, #0x3
 	blx r4
 	ldr r3, _020DD1C0 ; =0x04000204
-	ldr r1, _020DD1BC ; =UNK_021D6B0C
+	ldr r1, _020DD1BC ; =ctrdgi_flash_lock_id
 	ldrh r2, [r3, #0x0]
 	mov r4, r0
 	bic r0, r2, #0x3
@@ -419,24 +419,24 @@ CTRDGi_EraseFlashSectorCoreLE: ; 0x020DD098
 	bx lr
 	.balign 4
 _020DD1B8: .word 0x000080FF
-_020DD1BC: .word UNK_021D6B0C
+_020DD1BC: .word ctrdgi_flash_lock_id
 _020DD1C0: .word 0x04000204
-_020DD1C4: .word UNK_021D6B20
+_020DD1C4: .word AgbFlash
 _020DD1C8: .word 0x04000208
 _020DD1CC: .word UNK_021D6B38
 _020DD1D0: .word 0x0A005555
 _020DD1D4: .word 0x0A002AAA
-_020DD1D8: .word UNK_021D6B24
+_020DD1D8: .word CTRDGi_PollingSR
 
 	arm_func_start CTRDGi_EraseFlashChipCoreLE
 CTRDGi_EraseFlashChipCoreLE: ; 0x020DD1DC
 	stmdb sp!, {r4-r5,lr}
 	sub sp, sp, #0x4
-	ldr r0, _020DD2B8 ; =UNK_021D6B0C
+	ldr r0, _020DD2B8 ; =ctrdgi_flash_lock_id
 	ldrh r0, [r0, #0x0]
 	bl OS_LockCartridge
 	ldr r4, _020DD2BC ; =0x04000204
-	ldr r0, _020DD2C0 ; =UNK_021D6B20
+	ldr r0, _020DD2C0 ; =AgbFlash
 	ldrh r3, [r4, #0x0]
 	ldr r0, [r0, #0x0]
 	ldrh r1, [r4, #0x0]
@@ -464,7 +464,7 @@ CTRDGi_EraseFlashChipCoreLE: ; 0x020DD1DC
 	strb r2, [lr, #0x0]
 	ldrh r2, [r0, #0x0]
 	ldr r2, [r1, #0x0]
-	ldr r1, _020DD2D4 ; =UNK_021D6B24
+	ldr r1, _020DD2D4 ; =CTRDGi_PollingSR
 	strh r2, [r0, #0x0]
 	ldr r4, [r1, #0x0]
 	mov r0, #0x3
@@ -473,7 +473,7 @@ CTRDGi_EraseFlashChipCoreLE: ; 0x020DD1DC
 	and r5, r3, #0x3
 	blx r4
 	ldr r3, _020DD2BC ; =0x04000204
-	ldr r1, _020DD2B8 ; =UNK_021D6B0C
+	ldr r1, _020DD2B8 ; =ctrdgi_flash_lock_id
 	ldrh r2, [r3, #0x0]
 	mov r4, r0
 	bic r0, r2, #0x3
@@ -486,11 +486,11 @@ CTRDGi_EraseFlashChipCoreLE: ; 0x020DD1DC
 	ldmia sp!, {r4-r5,lr}
 	bx lr
 	.balign 4
-_020DD2B8: .word UNK_021D6B0C
+_020DD2B8: .word ctrdgi_flash_lock_id
 _020DD2BC: .word 0x04000204
-_020DD2C0: .word UNK_021D6B20
+_020DD2C0: .word AgbFlash
 _020DD2C4: .word 0x04000208
 _020DD2C8: .word UNK_021D6B38
 _020DD2CC: .word 0x0A005555
 _020DD2D0: .word 0x0A002AAA
-_020DD2D4: .word UNK_021D6B24
+_020DD2D4: .word CTRDGi_PollingSR
diff --git a/arm9/asm/CTRDG_flash_MX29L010.s b/arm9/asm/CTRDG_flash_MX29L010.s
index 5ac28935..7b4e1dc3 100644
--- a/arm9/asm/CTRDG_flash_MX29L010.s
+++ b/arm9/asm/CTRDG_flash_MX29L010.s
@@ -2,9 +2,9 @@
 	.include "global.inc"
 
 	.extern CTRDGi_PollingSR1MCOMMON
-	.extern UNK_021D6B20
-	.extern UNK_021D6B24
-	.extern UNK_021D6B0C
+	.extern AgbFlash
+	.extern CTRDGi_PollingSR
+	.extern ctrdgi_flash_lock_id
 	.extern UNK_021D6B38
 	.extern UNK_021D6B08
 
@@ -135,7 +135,7 @@ CTRDGi_WriteFlashSectorCoreMX: ; 0x020DD3D0
 	stmia r4!, {r0-r3}
 	ldmia r5!, {r0-r3}
 	stmia r4!, {r0-r3}
-	ldr r0, _020DD540 ; =UNK_021D6B20
+	ldr r0, _020DD540 ; =AgbFlash
 	ldr r1, [r5, #0x0]
 	ldr r0, [r0, #0x0]
 	str r1, [r4, #0x0]
@@ -153,11 +153,11 @@ CTRDGi_WriteFlashSectorCoreMX: ; 0x020DD3D0
 	addne sp, sp, #0x28
 	ldmneia sp!, {r4-r8,lr}
 	bxne lr
-	ldr r0, _020DD548 ; =UNK_021D6B0C
+	ldr r0, _020DD548 ; =ctrdgi_flash_lock_id
 	ldrh r0, [r0, #0x0]
 	bl OS_LockCartridge
 	ldr r7, _020DD54C ; =0x04000204
-	ldr r0, _020DD540 ; =UNK_021D6B20
+	ldr r0, _020DD540 ; =AgbFlash
 	ldrh r3, [r7, #0x0]
 	ldr r2, [r0, #0x0]
 	ldrh r1, [r7, #0x0]
@@ -169,7 +169,7 @@ CTRDGi_WriteFlashSectorCoreMX: ; 0x020DD3D0
 	strh r1, [r7, #0x0]
 	and r7, r3, #0x3
 	bl CTRDGi_SetFlashBankMx
-	ldr r0, _020DD540 ; =UNK_021D6B20
+	ldr r0, _020DD540 ; =AgbFlash
 	and r1, r5, #0xf
 	ldr r3, [r0, #0x0]
 	mov r0, r1, lsl #0x10
@@ -211,7 +211,7 @@ _020DD4FC:
 	ldr r2, _020DD54C ; =0x04000204
 	strh r0, [r3, #0x0]
 	ldrh r1, [r2, #0x0]
-	ldr r0, _020DD548 ; =UNK_021D6B0C
+	ldr r0, _020DD548 ; =ctrdgi_flash_lock_id
 	bic r1, r1, #0x3
 	orr r1, r1, r7
 	strh r1, [r2, #0x0]
@@ -222,9 +222,9 @@ _020DD4FC:
 	ldmia sp!, {r4-r8,lr}
 	bx lr
 	.balign 4
-_020DD540: .word UNK_021D6B20
+_020DD540: .word AgbFlash
 _020DD544: .word 0x000080FF
-_020DD548: .word UNK_021D6B0C
+_020DD548: .word ctrdgi_flash_lock_id
 _020DD54C: .word 0x04000204
 _020DD550: .word UNK_021D6B08
 _020DD554: .word 0x04000208
@@ -244,7 +244,7 @@ CTRDGi_ProgramFlashByteMX: ; 0x020DD55C
 	mov r0, #0xa0
 	strb r0, [r12, #0x0]
 	ldrb r2, [lr, #0x0]
-	ldr r3, _020DD5B8 ; =UNK_021D6B24
+	ldr r3, _020DD5B8 ; =CTRDGi_PollingSR
 	mov r0, #0x1
 	strb r2, [r1, #0x0]
 	ldrb r2, [lr, #0x0]
@@ -256,7 +256,7 @@ CTRDGi_ProgramFlashByteMX: ; 0x020DD55C
 	.balign 4
 _020DD5B0: .word 0x0A005555
 _020DD5B4: .word 0x0A002AAA
-_020DD5B8: .word UNK_021D6B24
+_020DD5B8: .word CTRDGi_PollingSR
 
 	arm_func_start CTRDGi_EraseFlashSectorCoreMX
 CTRDGi_EraseFlashSectorCoreMX: ; 0x020DD5BC
@@ -268,7 +268,7 @@ CTRDGi_EraseFlashSectorCoreMX: ; 0x020DD5BC
 	stmia r4!, {r0-r3}
 	ldmia r5!, {r0-r3}
 	stmia r4!, {r0-r3}
-	ldr r0, _020DD748 ; =UNK_021D6B20
+	ldr r0, _020DD748 ; =AgbFlash
 	ldr r1, [r5, #0x0]
 	ldr r0, [r0, #0x0]
 	str r1, [r4, #0x0]
@@ -279,11 +279,11 @@ CTRDGi_EraseFlashSectorCoreMX: ; 0x020DD5BC
 	ldrhs r0, _020DD74C ; =0x000080FF
 	ldmcsia sp!, {r4-r11,lr}
 	bxcs lr
-	ldr r0, _020DD750 ; =UNK_021D6B0C
+	ldr r0, _020DD750 ; =ctrdgi_flash_lock_id
 	ldrh r0, [r0, #0x0]
 	bl OS_LockCartridge
 	ldr r5, _020DD754 ; =0x04000204
-	ldr r0, _020DD748 ; =UNK_021D6B20
+	ldr r0, _020DD748 ; =AgbFlash
 	ldrh r3, [r5, #0x0]
 	ldr r2, [r0, #0x0]
 	ldrh r1, [r5, #0x0]
@@ -311,7 +311,7 @@ CTRDGi_EraseFlashSectorCoreMX: ; 0x020DD5BC
 	mov r4, #0x30
 	str r0, [sp, #0xc]
 _020DD684:
-	ldr r0, _020DD748 ; =UNK_021D6B20
+	ldr r0, _020DD748 ; =AgbFlash
 	ldrh r12, [r8, #0x0]
 	ldr r0, [r0, #0x0]
 	ldr r3, _020DD75C ; =UNK_021D6B38
@@ -336,7 +336,7 @@ _020DD684:
 	ldr r3, _020DD75C ; =UNK_021D6B38
 	ldr r3, [r3, #0x0]
 	strh r3, [r8, #0x0]
-	ldr r3, _020DD768 ; =UNK_021D6B24
+	ldr r3, _020DD768 ; =CTRDGi_PollingSR
 	ldr r3, [r3, #0x0]
 	blx r3
 	str r0, [sp, #0x4]
@@ -349,7 +349,7 @@ _020DD684:
 	beq _020DD684
 _020DD714:
 	ldr r2, _020DD754 ; =0x04000204
-	ldr r1, _020DD750 ; =UNK_021D6B0C
+	ldr r1, _020DD750 ; =ctrdgi_flash_lock_id
 	ldrh r0, [r2, #0x0]
 	bic r3, r0, #0x3
 	ldr r0, [sp, #0x0]
@@ -362,25 +362,25 @@ _020DD714:
 	ldmia sp!, {r4-r11,lr}
 	bx lr
 	.balign 4
-_020DD748: .word UNK_021D6B20
+_020DD748: .word AgbFlash
 _020DD74C: .word 0x000080FF
-_020DD750: .word UNK_021D6B0C
+_020DD750: .word ctrdgi_flash_lock_id
 _020DD754: .word 0x04000204
 _020DD758: .word 0x04000208
 _020DD75C: .word UNK_021D6B38
 _020DD760: .word 0x0A005555
 _020DD764: .word 0x0A002AAA
-_020DD768: .word UNK_021D6B24
+_020DD768: .word CTRDGi_PollingSR
 
 	arm_func_start CTRDGi_EraseFlashChipCoreMX
 CTRDGi_EraseFlashChipCoreMX: ; 0x020DD76C
 	stmdb sp!, {r4-r5,lr}
 	sub sp, sp, #0x4
-	ldr r0, _020DD848 ; =UNK_021D6B0C
+	ldr r0, _020DD848 ; =ctrdgi_flash_lock_id
 	ldrh r0, [r0, #0x0]
 	bl OS_LockCartridge
 	ldr r4, _020DD84C ; =0x04000204
-	ldr r0, _020DD850 ; =UNK_021D6B20
+	ldr r0, _020DD850 ; =AgbFlash
 	ldrh r3, [r4, #0x0]
 	ldr r0, [r0, #0x0]
 	ldrh r1, [r4, #0x0]
@@ -408,7 +408,7 @@ CTRDGi_EraseFlashChipCoreMX: ; 0x020DD76C
 	strb r2, [lr, #0x0]
 	ldrh r2, [r0, #0x0]
 	ldr r2, [r1, #0x0]
-	ldr r1, _020DD864 ; =UNK_021D6B24
+	ldr r1, _020DD864 ; =CTRDGi_PollingSR
 	strh r2, [r0, #0x0]
 	ldr r4, [r1, #0x0]
 	mov r0, #0x3
@@ -417,7 +417,7 @@ CTRDGi_EraseFlashChipCoreMX: ; 0x020DD76C
 	and r5, r3, #0x3
 	blx r4
 	ldr r3, _020DD84C ; =0x04000204
-	ldr r1, _020DD848 ; =UNK_021D6B0C
+	ldr r1, _020DD848 ; =ctrdgi_flash_lock_id
 	ldrh r2, [r3, #0x0]
 	mov r4, r0
 	bic r0, r2, #0x3
@@ -430,11 +430,11 @@ CTRDGi_EraseFlashChipCoreMX: ; 0x020DD76C
 	ldmia sp!, {r4-r5,lr}
 	bx lr
 	.balign 4
-_020DD848: .word UNK_021D6B0C
+_020DD848: .word ctrdgi_flash_lock_id
 _020DD84C: .word 0x04000204
-_020DD850: .word UNK_021D6B20
+_020DD850: .word AgbFlash
 _020DD854: .word 0x04000208
 _020DD858: .word UNK_021D6B38
 _020DD85C: .word 0x0A005555
 _020DD860: .word 0x0A002AAA
-_020DD864: .word UNK_021D6B24
+_020DD864: .word CTRDGi_PollingSR
diff --git a/arm9/asm/CTRDG_flash_MX29L512.s b/arm9/asm/CTRDG_flash_MX29L512.s
index 17b50125..eac57f63 100644
--- a/arm9/asm/CTRDG_flash_MX29L512.s
+++ b/arm9/asm/CTRDG_flash_MX29L512.s
@@ -6,8 +6,8 @@
 	.extern CTRDGi_EraseFlashSectorAsyncLE
 	.extern CTRDGi_PollingSR512kCOMMON
 	.extern UNK_021D6B08
-	.extern UNK_021D6B20
-	.extern UNK_021D6B0C
+	.extern AgbFlash
+	.extern ctrdgi_flash_lock_id
 
 	.section .rodata
 
@@ -69,7 +69,7 @@ CTRDGi_WriteFlashSectorCoreMX5: ; 0x020DD8C0
 	stmia r4!, {r0-r3}
 	ldmia r5!, {r0-r3}
 	stmia r4!, {r0-r3}
-	ldr r0, _020DD9E8 ; =UNK_021D6B20
+	ldr r0, _020DD9E8 ; =AgbFlash
 	ldr r1, [r5, #0x0]
 	ldr r0, [r0, #0x0]
 	str r1, [r4, #0x0]
@@ -87,11 +87,11 @@ CTRDGi_WriteFlashSectorCoreMX5: ; 0x020DD8C0
 	addne sp, sp, #0x28
 	ldmneia sp!, {r4-r8,lr}
 	bxne lr
-	ldr r0, _020DD9F0 ; =UNK_021D6B0C
+	ldr r0, _020DD9F0 ; =ctrdgi_flash_lock_id
 	ldrh r0, [r0, #0x0]
 	bl OS_LockCartridge
 	ldr r7, _020DD9F4 ; =0x04000204
-	ldr r0, _020DD9E8 ; =UNK_021D6B20
+	ldr r0, _020DD9E8 ; =AgbFlash
 	ldrh r3, [r7, #0x0]
 	ldr r2, [r0, #0x0]
 	ldrh r1, [r7, #0x0]
@@ -126,7 +126,7 @@ _020DD984:
 	bne _020DD984
 _020DD9B8:
 	ldr r2, _020DD9F4 ; =0x04000204
-	ldr r0, _020DD9F0 ; =UNK_021D6B0C
+	ldr r0, _020DD9F0 ; =ctrdgi_flash_lock_id
 	ldrh r1, [r2, #0x0]
 	bic r1, r1, #0x3
 	orr r1, r1, r7
@@ -138,8 +138,8 @@ _020DD9B8:
 	ldmia sp!, {r4-r8,lr}
 	bx lr
 	.balign 4
-_020DD9E8: .word UNK_021D6B20
+_020DD9E8: .word AgbFlash
 _020DD9EC: .word 0x000080FF
-_020DD9F0: .word UNK_021D6B0C
+_020DD9F0: .word ctrdgi_flash_lock_id
 _020DD9F4: .word 0x04000204
 _020DD9F8: .word UNK_021D6B08
diff --git a/arm9/asm/CTRDG_flash_common.s b/arm9/asm/CTRDG_flash_common.s
index aaef15fb..4c51608a 100644
--- a/arm9/asm/CTRDG_flash_common.s
+++ b/arm9/asm/CTRDG_flash_common.s
@@ -7,48 +7,48 @@
 UNK_021D6B08: ; 0x021D6B08
 	.space 0x4
 
-	.global UNK_021D6B0C
-UNK_021D6B0C: ; 0x021D6B0C
+	.global ctrdgi_flash_lock_id
+ctrdgi_flash_lock_id: ; 0x021D6B0C
 	.space 0x4
 
 	.global UNK_021D6B10
 UNK_021D6B10: ; 0x021D6B10
 	.space 0x4
 
-	.global UNK_021D6B14
-UNK_021D6B14: ; 0x021D6B14
+	.global CTRDGi_WriteAgbFlashSector
+CTRDGi_WriteAgbFlashSector: ; 0x021D6B14
 	.space 0x4
 
-	.global UNK_021D6B18
-UNK_021D6B18: ; 0x021D6B18
+	.global CTRDGi_WriteAgbFlashSectorAsync
+CTRDGi_WriteAgbFlashSectorAsync: ; 0x021D6B18
 	.space 0x4
 
-	.global UNK_021D6B1C
-UNK_021D6B1C: ; 0x021D6B1C
+	.global CTRDGi_EraseAgbFlashChipAsync
+CTRDGi_EraseAgbFlashChipAsync: ; 0x021D6B1C
 	.space 0x4
 
-	.global UNK_021D6B20
-UNK_021D6B20: ; 0x021D6B20
+	.global AgbFlash
+AgbFlash: ; 0x021D6B20
 	.space 0x4
 
-	.global UNK_021D6B24
-UNK_021D6B24: ; 0x021D6B24
+	.global CTRDGi_PollingSR
+CTRDGi_PollingSR: ; 0x021D6B24
 	.space 0x4
 
-	.global UNK_021D6B28
-UNK_021D6B28: ; 0x021D6B28
+	.global ctrdgi_fl_maxtime
+ctrdgi_fl_maxtime: ; 0x021D6B28
 	.space 0x4
 
-	.global UNK_021D6B2C
-UNK_021D6B2C: ; 0x021D6B2C
+	.global CTRDGi_EraseAgbFlashSector
+CTRDGi_EraseAgbFlashSector: ; 0x021D6B2C
 	.space 0x4
 
-	.global UNK_021D6B30
-UNK_021D6B30: ; 0x021D6B30
+	.global CTRDGi_EraseAgbFlashSectorAsync
+CTRDGi_EraseAgbFlashSectorAsync: ; 0x021D6B30
 	.space 0x4
 
-	.global UNK_021D6B34
-UNK_021D6B34: ; 0x021D6B34
+	.global CTRDGi_EraseAgbFlashChip
+CTRDGi_EraseAgbFlashChip: ; 0x021D6B34
 	.space 0x4
 
 	.global UNK_021D6B38
@@ -63,8 +63,8 @@ UNK_021D6B3C: ; 0x021D6B3C
 UNK_021D6B44: ; 0x021D6B44
 	.space 0x8
 
-	.global UNK_021D6B4C
-UNK_021D6B4C: ; 0x021D6B4C
+	.global ctrdgi_sram_lock_id
+ctrdgi_sram_lock_id: ; 0x021D6B4C
 	.space 0x4
 
     .text
@@ -103,14 +103,14 @@ CTRDG_VerifyAgbFlash:
 CTRDG_WriteAgbFlashSector:
 	stmdb sp!, {lr}
 	sub sp, sp, #0x4
-	ldr r2, _020DBF90 ; =UNK_021D6B14
+	ldr r2, _020DBF90 ; =CTRDGi_WriteAgbFlashSector
 	ldr r2, [r2, #0x0]
 	blx r2
 	add sp, sp, #0x4
 	ldmia sp!, {lr}
 	bx lr
 	.balign 4
-_020DBF90: .word UNK_021D6B14
+_020DBF90: .word CTRDGi_WriteAgbFlashSector
 
 	arm_func_start CTRDG_ReadAgbFlash
 CTRDG_ReadAgbFlash: ; 0x020DBF94
@@ -178,7 +178,7 @@ CTRDGi_VerifyAgbFlashCore: ; 0x020DC04C
 	stmia r4!, {r0-r3}
 	ldmia r5!, {r0-r3}
 	stmia r4!, {r0-r3}
-	ldr r0, _020DC128 ; =UNK_021D6B0C
+	ldr r0, _020DC128 ; =ctrdgi_flash_lock_id
 	ldr r1, [r5, #0x0]
 	ldrh r0, [r0, #0x0]
 	str r1, [r4, #0x0]
@@ -187,7 +187,7 @@ CTRDGi_VerifyAgbFlashCore: ; 0x020DC04C
 	ldr r4, [sp, #0x18]
 	bl OS_LockCartridge
 	ldr r3, _020DC12C ; =0x04000204
-	ldr r0, _020DC130 ; =UNK_021D6B20
+	ldr r0, _020DC130 ; =AgbFlash
 	ldrh r2, [r3, #0x0]
 	ldrh r1, [r3, #0x0]
 	and r7, r2, #0x3
@@ -205,7 +205,7 @@ CTRDGi_VerifyAgbFlashCore: ; 0x020DC04C
 	mov r0, r0, lsl #0x10
 	mov r6, r0, lsr #0x10
 _020DC0D4:
-	ldr r1, _020DC130 ; =UNK_021D6B20
+	ldr r1, _020DC130 ; =AgbFlash
 	mov r0, r5
 	ldr r1, [r1, #0x0]
 	mov r2, r4
@@ -214,7 +214,7 @@ _020DC0D4:
 	add r1, r1, #0xa000000
 	bl CTRDGi_VerifyFlashSectorCore
 	ldr r3, _020DC12C ; =0x04000204
-	ldr r1, _020DC128 ; =UNK_021D6B0C
+	ldr r1, _020DC128 ; =ctrdgi_flash_lock_id
 	ldrh r2, [r3, #0x0]
 	mov r4, r0
 	bic r0, r2, #0x3
@@ -227,9 +227,9 @@ _020DC0D4:
 	ldmia sp!, {r4-r7,lr}
 	bx lr
 	.balign 4
-_020DC128: .word UNK_021D6B0C
+_020DC128: .word ctrdgi_flash_lock_id
 _020DC12C: .word 0x04000204
-_020DC130: .word UNK_021D6B20
+_020DC130: .word AgbFlash
 
 	arm_func_start CTRDGi_VerifyFlashSectorCore
 CTRDGi_VerifyFlashSectorCore: ; 0x020DC134
@@ -259,7 +259,7 @@ CTRDGi_ReadAgbFlashCore: ; 0x020DC168
 	stmia r4!, {r0-r3}
 	ldmia r5!, {r0-r3}
 	stmia r4!, {r0-r3}
-	ldr r0, _020DC25C ; =UNK_021D6B0C
+	ldr r0, _020DC25C ; =ctrdgi_flash_lock_id
 	ldr r1, [r5, #0x0]
 	ldrh r0, [r0, #0x0]
 	str r1, [r4, #0x0]
@@ -269,7 +269,7 @@ CTRDGi_ReadAgbFlashCore: ; 0x020DC168
 	ldr r4, [sp, #0x18]
 	bl OS_LockCartridge
 	ldr r3, _020DC260 ; =0x04000204
-	ldr r0, _020DC264 ; =UNK_021D6B20
+	ldr r0, _020DC264 ; =AgbFlash
 	ldrh r2, [r3, #0x0]
 	ldrh r1, [r3, #0x0]
 	and r8, r2, #0x3
@@ -287,7 +287,7 @@ CTRDGi_ReadAgbFlashCore: ; 0x020DC168
 	mov r0, r0, lsl #0x10
 	mov r7, r0, lsr #0x10
 _020DC1F4:
-	ldr r0, _020DC264 ; =UNK_021D6B20
+	ldr r0, _020DC264 ; =AgbFlash
 	cmp r4, #0x0
 	ldr r0, [r0, #0x0]
 	sub r4, r4, #0x1
@@ -304,7 +304,7 @@ _020DC218:
 	bne _020DC218
 _020DC22C:
 	ldr r2, _020DC260 ; =0x04000204
-	ldr r0, _020DC25C ; =UNK_021D6B0C
+	ldr r0, _020DC25C ; =ctrdgi_flash_lock_id
 	ldrh r1, [r2, #0x0]
 	bic r1, r1, #0x3
 	orr r1, r1, r8
@@ -316,9 +316,9 @@ _020DC22C:
 	ldmia sp!, {r4-r8,lr}
 	bx lr
 	.balign 4
-_020DC25C: .word UNK_021D6B0C
+_020DC25C: .word ctrdgi_flash_lock_id
 _020DC260: .word 0x04000204
-_020DC264: .word UNK_021D6B20
+_020DC264: .word AgbFlash
 
 	arm_func_start CTRDGi_PollingSR1MCOMMON
 CTRDGi_PollingSR1MCOMMON: ; 0x020DC268
@@ -398,7 +398,7 @@ _020DC33C:
 _020DC360: ; 0x020DC360
 	cmp r7, r0
 	beq _020DC390
-	ldr r0, _020DC3AC ; =UNK_021D6B20
+	ldr r0, _020DC3AC ; =AgbFlash
 	ldr r0, [r0, #0x0]
 	ldrh r0, [r0, #0x18]
 	cmp r0, #0xc2
@@ -418,7 +418,7 @@ _020DC394: ; 0x020DC394
 	bx lr
 	.balign 4
 _020DC3A8: .word UNK_021D6B10
-_020DC3AC: .word UNK_021D6B20
+_020DC3AC: .word AgbFlash
 _020DC3B0: .word 0x0A005555
 
 	arm_func_start CTRDGi_ReadSrFunc
@@ -463,7 +463,7 @@ _020DC42C: .word UNK_021D6B10
 StartFlashTimer: ; 0x020DC430
 	stmdb sp!, {lr}
 	sub sp, sp, #0x4
-	ldr r1, _020DC47C ; =UNK_021D6B28
+	ldr r1, _020DC47C ; =ctrdgi_fl_maxtime
 	ldr r2, _020DC480 ; =UNK_021D6B10
 	mov r3, #0x0
 	ldr r1, [r1, #0x0]
@@ -481,7 +481,7 @@ StartFlashTimer: ; 0x020DC430
 	ldmia sp!, {lr}
 	bx lr
 	.balign 4
-_020DC47C: .word UNK_021D6B28
+_020DC47C: .word ctrdgi_fl_maxtime
 _020DC480: .word UNK_021D6B10
 _020DC484: .word UNK_021D6B3C
 _020DC488: .word UNK_021D6B44
diff --git a/arm9/lib/include/CTRDG_backup.h b/arm9/lib/include/CTRDG_backup.h
new file mode 100644
index 00000000..d248b7a1
--- /dev/null
+++ b/arm9/lib/include/CTRDG_backup.h
@@ -0,0 +1,41 @@
+#ifndef POKEDIAMOND_CTRDG_BACKUP_H
+#define POKEDIAMOND_CTRDG_BACKUP_H
+
+#include "nitro/types.h"
+#include "CTRDG_flash.h"
+#include "CTRDG_task.h"
+
+typedef struct CTRDGiFlashTypePlusTag
+{
+    u16 (*CTRDGi_WriteAgbFlashSector)(u16 secNo, u8 *src);
+    u16 (*CTRDGi_EraseAgbFlashChip)(void);
+    u16 (*CTRDGi_EraseAgbFlashSector)(u16 secNo);
+    void (*CTRDGi_WriteAgbFlashSectorAsync)(u16 secNo, u8 *src, CTRDG_TASK_FUNC callback);
+    void (*CTRDGi_EraseAgbFlashChipAsync)(CTRDG_TASK_FUNC callback);
+    void (*CTRDGi_EraseAgbFlashSectorAsync)(u16 secNo, CTRDG_TASK_FUNC callback);
+    u16  (*CTRDGi_PollingSR)(u16 phase, u8 *adr, u16 lastData);
+    const u16 (*maxtime);
+    CTRDGFlashType type;
+} CTRDGiFlashTypePlus;
+
+typedef enum
+{
+    CTRDG_BACKUP_TYPE_FLASH_512K,
+    CTRDG_BACKUP_TYPE_FLASH_1M,
+    CTRDG_BACKUP_TYPE_SRAM
+} CTRDGBackupType;
+
+extern const u16 (*ctrdgi_fl_maxtime);
+
+extern u16 (*CTRDGi_PollingSR)(u16 phase, u8 *adr, u16 lastData);
+extern const CTRDGFlashType *AgbFlash;
+extern u16 (*CTRDGi_WriteAgbFlashSector)(u16 secNo, u8 *src);
+extern u16 (*CTRDGi_EraseAgbFlashChip)(void);
+extern u16 (*CTRDGi_EraseAgbFlashSector)(u16 secNo);
+extern void (*CTRDGi_WriteAgbFlashSectorAsync)(u16 secNo, u8 *src, CTRDG_TASK_FUNC callback);
+extern void (*CTRDGi_EraseAgbFlashChipAsync)(CTRDG_TASK_FUNC callback);
+extern void (*CTRDGi_EraseAgbFlashSectorAsync)(u16 secNo, CTRDG_TASK_FUNC callback);
+
+u16 CTRDG_IdentifyAgbBackup(CTRDGBackupType type);
+
+#endif //POKEDIAMOND_CTRDG_BACKUP_H
diff --git a/arm9/lib/include/CTRDG_flash.h b/arm9/lib/include/CTRDG_flash.h
new file mode 100644
index 00000000..9a4aff41
--- /dev/null
+++ b/arm9/lib/include/CTRDG_flash.h
@@ -0,0 +1,25 @@
+#ifndef POKEDIAMOND_CTRDG_FLASH_H
+#define POKEDIAMOND_CTRDG_FLASH_H
+
+#include "nitro/types.h"
+#include "MI_exMemory.h"
+
+typedef struct CTRDGiFlashSectorTag
+{
+    u32 size;
+    u16 shift;
+    u16 count;
+    u16 top;
+    u8 reserved[2];
+} CTRDGiFlashSector;
+
+typedef struct CTRDGFlashTypeTag
+{
+    u32 romSize;
+    CTRDGiFlashSector sector;
+    MICartridgeRamCycle agbWait[2];
+    u16 makerID;
+    u16 deviceID;
+} CTRDGFlashType;
+
+#endif //POKEDIAMOND_CTRDG_FLASH_H
diff --git a/arm9/lib/include/CTRDG_task.h b/arm9/lib/include/CTRDG_task.h
new file mode 100644
index 00000000..2cf7a233
--- /dev/null
+++ b/arm9/lib/include/CTRDG_task.h
@@ -0,0 +1,25 @@
+#ifndef POKEDIAMOND_CTRDG_TASK_H
+#define POKEDIAMOND_CTRDG_TASK_H
+
+#include "nitro/types.h"
+
+struct CTRDGTaskInfo_tag;
+
+typedef u32 (*CTRDG_TASK_FUNC) (struct CTRDGTaskInfo_tag *);
+
+typedef struct CTRDGTaskInfo_tag
+{
+    CTRDG_TASK_FUNC task;
+    CTRDG_TASK_FUNC callback;
+    u32 result;
+    u8 *data;
+    u8 *adr;
+    u32 offset;
+    u32 size;
+    u8 *dst;
+    u16 sec_num;
+    u8 busy;
+    u8 param[1];
+} CTRDGTaskInfo;
+
+#endif //POKEDIAMOND_CTRDG_TASK_H
diff --git a/arm9/lib/include/MI_exMemory.h b/arm9/lib/include/MI_exMemory.h
index df46b008..aa90a73c 100644
--- a/arm9/lib/include/MI_exMemory.h
+++ b/arm9/lib/include/MI_exMemory.h
@@ -22,6 +22,14 @@ typedef enum
     MI_CTRDG_ROMCYCLE2_4 = 1
 } MICartridgeRomCycle2nd;
 
+typedef enum
+{
+    MI_CTRDG_RAMCYCLE_10 = 0,
+    MI_CTRDG_RAMCYCLE_8 = 1,
+    MI_CTRDG_RAMCYCLE_6 = 2,
+    MI_CTRDG_RAMCYCLE_18 = 3
+} MICartridgeRamCycle;
+
 static inline void MIi_SetCardProcessor(MIProcessor proc)
 {
     reg_MI_EXMEMCNT =
@@ -54,4 +62,14 @@ static inline void MI_SetCartridgeRomCycle2nd(MICartridgeRomCycle2nd c2)
     reg_MI_EXMEMCNT = (u16)((reg_MI_EXMEMCNT & ~0x10) | (c2 << 4));
 }
 
+static inline void MI_SetCartridgeRamCycle(MICartridgeRamCycle c)
+{
+    reg_MI_EXMEMCNT = (u16)((reg_MI_EXMEMCNT & ~3) | (c << 0));
+}
+
+static inline MICartridgeRamCycle MI_GetCartridgeRamCycle(void)
+{
+    return (MICartridgeRamCycle)((reg_MI_EXMEMCNT & 3) >> 0);
+}
+
 #endif //POKEDIAMOND_MI_EXMEMORY_H
diff --git a/arm9/lib/src/CTRDG_backup.c b/arm9/lib/src/CTRDG_backup.c
new file mode 100644
index 00000000..dc1a3f4b
--- /dev/null
+++ b/arm9/lib/src/CTRDG_backup.c
@@ -0,0 +1,94 @@
+#include "CTRDG_backup.h"
+#include "function_target.h"
+#include "OS_spinLock.h"
+
+extern u16 ctrdgi_flash_lock_id;
+extern u16 ctrdgi_sram_lock_id;
+
+extern u16 CTRDGi_ReadFlashID(void);
+
+extern const CTRDGiFlashTypePlus defaultFlash1M;
+extern const CTRDGiFlashTypePlus MX29L010;
+extern const CTRDGiFlashTypePlus LE26FV10N1TS_10;
+
+extern const CTRDGiFlashTypePlus defaultFlash512;
+extern const CTRDGiFlashTypePlus LE39FW512;
+extern const CTRDGiFlashTypePlus AT29LV512_lib;
+extern const CTRDGiFlashTypePlus MN63F805MNP;
+
+static const CTRDGiFlashTypePlus *const flash1M_list[] = {
+        &MX29L010,
+        &LE26FV10N1TS_10,
+        &defaultFlash1M
+};
+
+static const CTRDGiFlashTypePlus *const flash512_list[] = {
+        &LE39FW512,
+        &AT29LV512_lib,
+        &MN63F805MNP,
+        &defaultFlash512
+};
+
+static const u16 readidtime[] = {
+        20
+};
+
+ARM_FUNC u16 CTRDG_IdentifyAgbBackup(CTRDGBackupType type)
+{
+    u16 result = 1;
+    u16 flashID;
+    const CTRDGiFlashTypePlus *const *flp;
+    MICartridgeRamCycle ram_cycle;
+
+    if (type == CTRDG_BACKUP_TYPE_FLASH_512K || type == CTRDG_BACKUP_TYPE_FLASH_1M)
+    {
+        ctrdgi_flash_lock_id = (u16)OS_GetLockID();
+
+        (void)OS_LockCartridge(ctrdgi_flash_lock_id);
+
+        ram_cycle = MI_GetCartridgeRamCycle();
+        MI_SetCartridgeRamCycle(MI_CTRDG_RAMCYCLE_18);
+
+        ctrdgi_fl_maxtime = readidtime;
+        flashID = CTRDGi_ReadFlashID();
+
+        if (type == CTRDG_BACKUP_TYPE_FLASH_512K)
+        {
+            flp = flash512_list;
+        }
+
+        if (type == CTRDG_BACKUP_TYPE_FLASH_1M)
+        {
+            flp = flash1M_list;
+        }
+
+        MI_SetCartridgeRamCycle(ram_cycle);
+        (void)OS_UnlockCartridge(ctrdgi_flash_lock_id);
+
+        result = 1;
+        while ((*flp)->type.makerID != 0)
+        {
+            if ((flashID & 0xff) == *(u16 *)&((*flp)->type.makerID))
+            {
+                result = 0;
+                break;
+            }
+            flp++;
+        }
+        CTRDGi_WriteAgbFlashSector = (*flp)->CTRDGi_WriteAgbFlashSector;
+        CTRDGi_EraseAgbFlashChip = (*flp)->CTRDGi_EraseAgbFlashChip;
+        CTRDGi_EraseAgbFlashSector = (*flp)->CTRDGi_EraseAgbFlashSector;
+        CTRDGi_WriteAgbFlashSectorAsync = (*flp)->CTRDGi_WriteAgbFlashSectorAsync;
+        CTRDGi_EraseAgbFlashChipAsync = (*flp)->CTRDGi_EraseAgbFlashChipAsync;
+        CTRDGi_EraseAgbFlashSectorAsync = (*flp)->CTRDGi_EraseAgbFlashSectorAsync;
+        CTRDGi_PollingSR = (*flp)->CTRDGi_PollingSR;
+        ctrdgi_fl_maxtime = (*flp)->maxtime;
+        AgbFlash = &(*flp)->type;
+    }
+    else if (type == CTRDG_BACKUP_TYPE_SRAM)
+    {
+        ctrdgi_sram_lock_id = (u16)OS_GetLockID();
+        result = 0;
+    }
+    return result;
+}