diff --git a/asm/chooseFile.s b/asm/chooseFile.s
index 1108ccd0..9705194d 100755
--- a/asm/chooseFile.s
+++ b/asm/chooseFile.s
@@ -1204,7 +1204,7 @@ sub_08051458: @ 0x08051458
 	ldr r1, _0805147C @ =gUnk_02022030
 	movs r2, #0x80
 	lsls r2, r2, #3
-	bl sub_0801D66C
+	bl _DmaCopy
 	pop {pc}
 	.align 2, 0
 _08051474: .4byte gMenu
@@ -1364,7 +1364,7 @@ sub_08051574: @ 0x08051574
 	muls r1, r2, r1
 	adds r3, #0xc
 	adds r1, r1, r3
-	bl sub_0801D66C
+	bl _DmaCopy
 	bl sub_0805070C
 	pop {pc}
 	.align 2, 0
@@ -1742,7 +1742,7 @@ sub_08051874: @ 0x08051874
 	adds r3, r4, #0
 	adds r3, #0xc
 	adds r1, r1, r3
-	bl sub_0801D66C
+	bl _DmaCopy
 	movs r0, #0
 	bl sub_080503BC
 	b _080518DE
@@ -1895,7 +1895,7 @@ sub_080519B0: @ 0x080519B0
 	adds r1, r4, #0
 	adds r1, #0xc
 	movs r2, #0x20
-	bl sub_0801D66C
+	bl _DmaCopy
 	movs r0, #4
 	strb r0, [r4, #9]
 	bl sub_08053518
diff --git a/asm/code_08018500.s b/asm/code_08018500.s
index bd53d8fc..e4aa9e2d 100644
--- a/asm/code_08018500.s
+++ b/asm/code_08018500.s
@@ -884,7 +884,7 @@ sub_08018BB4: @ 0x08018BB4
 	mov r5, sp
 	mov r1, sp
 	movs r2, #8
-	bl sub_0801D66C
+	bl _DmaCopy
 	lsls r0, r4, #2
 	adds r0, r0, r4
 	lsls r0, r0, #2
diff --git a/asm/code_08019444.s b/asm/code_08019444.s
index 4a7713fe..d8877c00 100644
--- a/asm/code_08019444.s
+++ b/asm/code_08019444.s
@@ -495,7 +495,7 @@ _08019810:
 _0801981A:
 	adds r0, r1, #0
 	adds r1, r3, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	b _0801982E
 _08019824:
 	ldrh r0, [r4]
@@ -3815,7 +3815,7 @@ _0801B114:
 	adds r1, r3, r0
 	lsls r2, r2, #5
 	adds r0, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 _0801B122:
 	ldr r0, [r4]
 	cmp r0, #0
diff --git a/asm/code_0801CEC0.s b/asm/code_0801CEC0.s
index c2eda998..c9434b01 100644
--- a/asm/code_0801CEC0.s
+++ b/asm/code_0801CEC0.s
@@ -730,7 +730,7 @@ _0801D4C8:
 	adds r1, r7, #0
 	movs r2, #0x20
 	str r3, [sp]
-	bl sub_0801D66C
+	bl _DmaCopy
 	adds r6, #0x20
 	adds r4, #4
 	adds r7, #0x20
diff --git a/asm/code_0801D79C.s b/asm/code_0801D79C.s
index 05616bc7..346a65e9 100644
--- a/asm/code_0801D79C.s
+++ b/asm/code_0801D79C.s
@@ -2142,11 +2142,11 @@ _0801E86C:
 	adds r0, r6, #0
 	adds r1, r7, #0
 	adds r2, r4, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	mov r0, r8
 	mov r1, sb
 	adds r2, r4, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 _0801E890:
 	movs r3, #1
 	add sb, r3
diff --git a/asm/code_0804AA84.s b/asm/code_0804AA84.s
index 00e8af4f..5ea286c8 100644
--- a/asm/code_0804AA84.s
+++ b/asm/code_0804AA84.s
@@ -45,7 +45,7 @@ _0804ABA4:
 	lsls r2, r2, #2
 	adds r1, r0, r2
 	movs r2, #0x20
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r2, _0804AC14 @ =gUsedPalettes
 	ldr r0, [r2]
 	movs r1, #0x80
diff --git a/asm/code_0804AEB0.s b/asm/code_0804AEB0.s
index b1a43ecc..a83e3f1b 100644
--- a/asm/code_0804AEB0.s
+++ b/asm/code_0804AEB0.s
@@ -50,7 +50,7 @@ _0804AEF6:
 _0804AF00:
 	adds r0, r6, #0
 	movs r2, #0x10
-	bl sub_0801D66C
+	bl _DmaCopy
 	pop {r4, r5, r6, pc}
 	.align 2, 0
 
diff --git a/asm/code_0804B058.s b/asm/code_0804B058.s
index 3557f857..93fc9bca 100644
--- a/asm/code_0804B058.s
+++ b/asm/code_0804B058.s
@@ -173,7 +173,7 @@ sub_0804B260: @ 0x0804B260
 	adds r0, r0, r1
 	ldr r1, _0804B278 @ =gUnk_02034398
 	movs r2, #0x20
-	bl sub_0801D66C
+	bl _DmaCopy
 	pop {pc}
 	.align 2, 0
 _0804B274: .4byte gUnk_080015BC
@@ -211,7 +211,7 @@ _0804B2A4:
 	adds r0, r2, #0
 	adds r1, r4, #0
 	movs r2, #8
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldrb r1, [r4, #6]
 	movs r0, #1
 	ands r0, r1
diff --git a/asm/code_080526F8.s b/asm/code_080526F8.s
index bb4bcbcc..4b1152ae 100644
--- a/asm/code_080526F8.s
+++ b/asm/code_080526F8.s
@@ -161,7 +161,7 @@ sub_080527FC: @ 0x080527FC
 	ldr r1, _08052834 @ =gPaletteBuffer
 	movs r2, #0x80
 	lsls r2, r2, #3
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r1, _08052838 @ =gUsedPalettes
 	movs r0, #1
 	rsbs r0, r0, #0
@@ -1258,7 +1258,7 @@ sub_080530B0: @ 0x080530B0
 	ldr r0, _080530C0 @ =gUnk_080FCAF8
 	ldr r1, _080530C4 @ =gUnk_030010EC
 	movs r2, #0x20
-	bl sub_0801D66C
+	bl _DmaCopy
 	pop {pc}
 	.align 2, 0
 _080530C0: .4byte gUnk_080FCAF8
@@ -1431,7 +1431,7 @@ sub_080531F8: @ 0x080531F8
 	ldr r1, _08053248 @ =gUnk_02002AC8
 	adds r0, r5, #0
 	movs r2, #0x20
-	bl sub_0801D66C
+	bl _DmaCopy
 	bl CheckIsDungeon
 	cmp r0, #0
 	beq _08053238
@@ -1483,7 +1483,7 @@ sub_08053250: @ 0x08053250
 	adds r0, #0xc
 	ldr r1, _08053298 @ =gUnk_02002AC8
 	movs r2, #0x20
-	bl sub_0801D66C
+	bl _DmaCopy
 	pop {r4, pc}
 	.align 2, 0
 _0805328C: .4byte gScreenTransition
diff --git a/asm/code_08055FF4.s b/asm/code_08055FF4.s
index 0ce62bc1..0effa9a0 100644
--- a/asm/code_08055FF4.s
+++ b/asm/code_08055FF4.s
@@ -32,7 +32,7 @@ _080560E4:
 	lsls r4, r4, #0x12
 	adds r1, r4, #0
 	movs r2, #0x10
-	bl sub_0801D66C
+	bl _DmaCopy
 	adds r0, r4, #0
 	bl sub_0807CF10
 _080560F8:
diff --git a/asm/code_08056418.s b/asm/code_08056418.s
index 6120eabb..e2519ccd 100644
--- a/asm/code_08056418.s
+++ b/asm/code_08056418.s
@@ -102,7 +102,7 @@ sub_080564EC: @ 0x080564EC
 	ldr r0, _080565A4 @ =gTextBox
 	adds r1, r4, #0
 	movs r2, #0x20
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldrb r0, [r4, #2]
 	cmp r0, #0x63
 	bne _08056520
diff --git a/asm/code_0805EC04.s b/asm/code_0805EC04.s
index d3380a65..ea3eba03 100644
--- a/asm/code_0805EC04.s
+++ b/asm/code_0805EC04.s
@@ -966,7 +966,7 @@ sub_0805F324: @ 0x0805F324
 	adds r7, r1, #0
 	mov r1, sp
 	movs r2, #0x30
-	bl sub_0801D66C
+	bl _DmaCopy
 	movs r0, #0
 	str r0, [sp, #0x34]
 	movs r1, #0
@@ -1142,7 +1142,7 @@ _0805F486:
 	adds r0, r5, #0
 	adds r1, r4, #0
 	movs r2, #0x18
-	bl sub_0801D66C
+	bl _DmaCopy
 	mov r0, sp
 	adds r1, r6, #0
 	bl sub_0805F440
@@ -1372,7 +1372,7 @@ _0805F63A:
 	ldr r0, [r4, #8]
 	ldr r1, [r4, #4]
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r0, [r4, #4]
 	adds r0, r0, r5
 	str r0, [r4, #4]
diff --git a/asm/code_0807B9B8.s b/asm/code_0807B9B8.s
index 97ec7f4d..f9881427 100644
--- a/asm/code_0807B9B8.s
+++ b/asm/code_0807B9B8.s
@@ -853,7 +853,7 @@ _0807C01C:
 	lsls r2, r2, #2
 	adds r1, r1, r2
 	movs r2, #0x20
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r2, _0807C0D4 @ =gUsedPalettes
 	ldr r0, [r2]
 	movs r1, #0x80
@@ -1015,13 +1015,13 @@ _0807C184:
 	movs r4, #0x80
 	lsls r4, r4, #6
 	adds r2, r4, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r0, _0807C1B8 @ =gUnk_0200B654
 	movs r3, #0xc0
 	lsls r3, r3, #6
 	adds r1, r0, r3
 	adds r2, r4, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	b _0807C26C
 	.align 2, 0
 _0807C1B0: .4byte gScreenTransition
@@ -1040,34 +1040,34 @@ _0807C1BC:
 	adds r0, r4, #0
 	mov r1, r8
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	movs r1, #0xc0
 	lsls r1, r1, #6
 	adds r6, r4, r1
 	adds r0, r6, #0
 	adds r1, r4, #0
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	mov r0, r8
 	adds r1, r6, #0
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	adds r6, r4, r5
 	adds r0, r6, #0
 	mov r1, r8
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	movs r2, #0x80
 	lsls r2, r2, #7
 	adds r4, r4, r2
 	adds r0, r4, #0
 	adds r1, r6, #0
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	mov r0, r8
 	adds r1, r4, #0
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r4, _0807C27C @ =gUnk_0200B654
 	movs r3, #0xb0
 	lsls r3, r3, #8
@@ -1076,34 +1076,34 @@ _0807C1BC:
 	adds r0, r4, #0
 	mov r1, r8
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	movs r0, #0xc0
 	lsls r0, r0, #6
 	adds r6, r4, r0
 	adds r0, r6, #0
 	adds r1, r4, #0
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	mov r0, r8
 	adds r1, r6, #0
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	adds r6, r4, r5
 	adds r0, r6, #0
 	mov r1, r8
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	movs r1, #0x80
 	lsls r1, r1, #7
 	adds r4, r4, r1
 	adds r0, r4, #0
 	adds r1, r6, #0
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	mov r0, r8
 	adds r1, r4, #0
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 _0807C26C:
 	mov r2, sb
 	cmp r2, #0
@@ -1161,7 +1161,7 @@ _0807C2E4:
 	adds r0, r4, #0
 	adds r1, r5, #0
 	adds r2, r6, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	adds r0, r4, #0
 	adds r1, r5, #0
 	bl sub_0807C5F4
@@ -1173,7 +1173,7 @@ _0807C2E4:
 	adds r0, r4, #0
 	adds r1, r5, #0
 	adds r2, r6, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	adds r0, r4, #0
 	adds r1, r5, #0
 	bl sub_0807C5F4
@@ -1449,7 +1449,7 @@ _0807C54A:
 	adds r0, r4, #0
 	adds r1, r5, #0
 	adds r2, r6, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	adds r0, r4, #0
 	adds r1, r5, #0
 	bl sub_0807C5F4
@@ -1461,7 +1461,7 @@ _0807C54A:
 	adds r0, r4, #0
 	adds r1, r5, #0
 	adds r2, r6, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	adds r0, r4, #0
 	adds r1, r5, #0
 	bl sub_0807C5F4
@@ -1870,13 +1870,13 @@ sub_0807C860: @ 0x0807C860
 	movs r4, #0x80
 	lsls r4, r4, #6
 	adds r2, r4, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r0, _0807C894 @ =gUnk_0200B654
 	movs r2, #0xc0
 	lsls r2, r2, #6
 	adds r1, r0, r2
 	adds r2, r4, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	pop {r4, pc}
 	.align 2, 0
 _0807C88C: .4byte gScreenTransition
diff --git a/asm/code_0807CC3C.s b/asm/code_0807CC3C.s
index bb51d941..e953f3ee 100644
--- a/asm/code_0807CC3C.s
+++ b/asm/code_0807CC3C.s
@@ -6978,14 +6978,14 @@ sub_08080108: @ 0x08080108
 	lsls r6, r6, #6
 	adds r0, r5, #0
 	adds r2, r6, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r4, _0808017C @ =gUnk_0200B654
 	movs r0, #0xc0
 	lsls r0, r0, #6
 	adds r1, r4, r0
 	adds r0, r4, #0
 	adds r2, r6, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	bl sub_08080368
 	ldr r1, _08080180 @ =gUnk_02034480
 	ldr r0, _08080184 @ =gUnk_0200B640
@@ -6995,7 +6995,7 @@ sub_08080108: @ 0x08080108
 	ldr r1, _0808018C @ =gUnk_020246B0
 	movs r2, #0xc0
 	lsls r2, r2, #5
-	bl sub_0801D66C
+	bl _DmaCopy
 	subs r5, #4
 	adds r0, r5, #0
 	bl sub_08080B60
diff --git a/asm/code_080A3BD0.s b/asm/code_080A3BD0.s
index 659d61f3..0c8593af 100644
--- a/asm/code_080A3BD0.s
+++ b/asm/code_080A3BD0.s
@@ -1130,7 +1130,7 @@ sub_080A44E0: @ 0x080A44E0
 	adds r5, r5, r1
 	adds r1, r5, #0
 	mov r2, r8
-	bl sub_0801D66C
+	bl _DmaCopy
 	adds r0, r6, #0
 	pop {r3}
 	mov r8, r3
@@ -1980,12 +1980,12 @@ sub_080A4BA0: @ 0x080A4BA0
 	ldr r0, _080A4C08 @ =gUnk_0812816C
 	mov r1, sp
 	movs r2, #0x18
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r0, _080A4C0C @ =gUnk_08128184
 	add r4, sp, #0x48
 	adds r1, r4, #0
 	movs r2, #0xc
-	bl sub_0801D66C
+	bl _DmaCopy
 	lsls r1, r6, #1
 	adds r1, r1, r6
 	lsls r2, r1, #9
@@ -2127,7 +2127,7 @@ sub_080A4CBC: @ 0x080A4CBC
 	ldr r1, _080A4D14 @ =0x0600E000
 	adds r0, r4, #0
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	adds r0, r6, #0
 	bl sub_080A4948
 	cmp r0, #0
diff --git a/asm/code_080A5574.s b/asm/code_080A5574.s
index 4a9bcdc1..9619ff0d 100644
--- a/asm/code_080A5574.s
+++ b/asm/code_080A5574.s
@@ -867,7 +867,7 @@ sub_080A5BF0: @ 0x080A5BF0
 	adds r0, r4, #2
 	adds r1, r4, #0
 	movs r2, #0xe
-	bl sub_0801D66C
+	bl _DmaCopy
 	strh r5, [r4, #0xe]
 	ldr r2, _080A5C40 @ =gUsedPalettes
 	ldr r0, [r2]
@@ -3420,7 +3420,7 @@ sub_080A7040: @ 0x080A7040
 	movs r2, #0x80
 	lsls r2, r2, #4
 	adds r0, r4, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r1, _080A70A0 @ =gUnk_08128D70
 	lsls r0, r5, #3
 	adds r4, r0, r1
@@ -3679,42 +3679,42 @@ sub_080A7250: @ 0x080A7250
 	ldr r0, _080A72EC @ =gScreen
 	ldr r1, _080A72F0 @ =gUnk_03001020
 	movs r2, #0x7c
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r0, _080A72F4 @ =gPaletteBuffer
 	ldr r1, _080A72F8 @ =gUnk_02024090
 	movs r2, #0x80
 	lsls r2, r2, #3
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r0, _080A72FC @ =gUnk_02024490
 	ldr r4, _080A7300 @ =gUnk_02032F14
 	movs r2, #0x85
 	lsls r2, r2, #2
 	adds r1, r4, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r0, _080A7304 @ =gUnk_02001A00
 	movs r2, #0x85
 	lsls r2, r2, #2
 	adds r1, r4, r2
 	movs r2, #0x40
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r0, _080A7308 @ =gRoomControls
 	adds r1, r4, #0
 	subs r1, #0x38
 	movs r2, #0x38
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r0, _080A730C @ =gUnk_03000420
 	movs r2, #0x95
 	lsls r2, r2, #2
 	adds r1, r4, r2
 	movs r2, #0x80
 	lsls r2, r2, #1
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r0, _080A7310 @ =gUnk_02033280
 	movs r2, #0xd5
 	lsls r2, r2, #2
 	adds r1, r4, r2
 	movs r2, #0xc
-	bl sub_0801D66C
+	bl _DmaCopy
 	bl sub_0805E958
 	adds r1, r4, #0
 	subs r1, #0x54
@@ -3838,36 +3838,36 @@ _080A73B4:
 	adds r0, r5, r1
 	ldr r1, _080A7480 @ =gUnk_02033280
 	movs r2, #0xc
-	bl sub_0801D66C
+	bl _DmaCopy
 	movs r1, #0xaa
 	lsls r1, r1, #2
 	adds r0, r5, r1
 	ldr r1, _080A7484 @ =gUnk_03000420
 	movs r2, #0x80
 	lsls r2, r2, #1
-	bl sub_0801D66C
+	bl _DmaCopy
 	movs r1, #0x9a
 	lsls r1, r1, #2
 	adds r0, r5, r1
 	ldr r1, _080A7488 @ =gUnk_02001A00
 	movs r2, #0x40
-	bl sub_0801D66C
+	bl _DmaCopy
 	adds r0, r5, #0
 	adds r0, #0x54
 	ldr r1, _080A748C @ =gUnk_02024490
 	movs r2, #0x85
 	lsls r2, r2, #2
-	bl sub_0801D66C
+	bl _DmaCopy
 	adds r0, r5, #0
 	adds r0, #0x1c
 	ldr r4, _080A7490 @ =gRoomControls
 	adds r1, r4, #0
 	movs r2, #0x38
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r0, _080A7494 @ =gUnk_03001020
 	ldr r1, _080A7498 @ =gScreen
 	movs r2, #0x7c
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldrb r0, [r4, #4]
 	bl sub_08052D58
 	ldr r4, _080A749C @ =gArea
@@ -10572,7 +10572,7 @@ sub_080AA654: @ 0x080AA654
 	ldr r0, _080AA688 @ =gUnk_0812A004
 	adds r1, r4, #0
 	movs r2, #0x10
-	bl sub_0801D66C
+	bl _DmaCopy
 	movs r1, #0x3f
 	adds r0, r5, #0
 	ands r0, r1
@@ -13189,7 +13189,7 @@ sub_080AB9DC: @ 0x080AB9DC
 	adds r1, r4, #0
 	adds r1, #0x68
 	movs r2, #0x1c
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldrh r1, [r4, #0x2e]
 	adds r0, r4, #0
 	adds r0, #0x84
diff --git a/asm/dust.s b/asm/dust.s
index c56c75fb..2f2faa92 100644
--- a/asm/dust.s
+++ b/asm/dust.s
@@ -146,7 +146,7 @@ _080441F2:
 	beq _0804429A
 	adds r0, r6, #0
 	adds r2, r5, #0
-	bl sub_0801D66C
+	bl _DmaCopy
 	adds r1, r4, #0
 	adds r1, #0x28
 	movs r0, #0xff
diff --git a/asm/gyorgFemale.s b/asm/gyorgFemale.s
index c7a2f7e0..f0fd69cb 100644
--- a/asm/gyorgFemale.s
+++ b/asm/gyorgFemale.s
@@ -475,7 +475,7 @@ _080464DE:
 	adds r0, r4, #0
 	adds r1, r5, #0
 	movs r2, #0x40
-	bl sub_0801D66C
+	bl _DmaCopy
 	movs r0, #0x80
 	lsls r0, r0, #1
 	adds r5, r5, r0
diff --git a/asm/manager10.s b/asm/manager10.s
index e07b7189..addec2c9 100644
--- a/asm/manager10.s
+++ b/asm/manager10.s
@@ -440,7 +440,7 @@ _080598AA:
 	lsls r2, r2, #2
 	adds r1, r0, r2
 	movs r2, #0x20
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r2, _080598F0 @ =gUsedPalettes
 	ldr r0, [r2]
 	ldr r1, _080598F4 @ =0x00207FFC
diff --git a/asm/manager39.s b/asm/manager39.s
index f5c9a542..1e92532d 100644
--- a/asm/manager39.s
+++ b/asm/manager39.s
@@ -142,7 +142,7 @@ sub_0805E1F8: @ 0x0805E1F8
 	ldr r0, _0805E238 @ =gUnk_08108E60
 	mov r1, sp
 	movs r2, #9
-	bl sub_0801D66C
+	bl _DmaCopy
 	mov r1, sp
 	lsrs r0, r4, #8
 	strb r0, [r1, #4]
diff --git a/asm/managerC.s b/asm/managerC.s
index d634ea71..ef613cdd 100644
--- a/asm/managerC.s
+++ b/asm/managerC.s
@@ -653,7 +653,7 @@ sub_08058D34: @ 0x08058D34
 	lsls r2, r2, #2
 	adds r1, r0, r2
 	movs r2, #0x20
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldr r2, _08058DB0 @ =gUsedPalettes
 	ldr r0, [r2]
 	movs r1, #0x80
diff --git a/asm/non_matching/sub_08054524.inc b/asm/non_matching/sub_08054524.inc
index fd079ac9..018cb569 100644
--- a/asm/non_matching/sub_08054524.inc
+++ b/asm/non_matching/sub_08054524.inc
@@ -20,7 +20,7 @@ _0805453A:
 	adds r0, r0, r1
 	ldr r1, _08054560 @ =gUnk_02034398
 	movs r2, #0x20
-	bl sub_0801D66C
+	bl _DmaCopy
 	pop {pc}
 	.align 2, 0
 _08054550: .4byte gArea
diff --git a/asm/object6A.s b/asm/object6A.s
index 71508057..d8eb941e 100644
--- a/asm/object6A.s
+++ b/asm/object6A.s
@@ -1692,7 +1692,7 @@ _0809572C:
 	adds r0, #0x6c
 	adds r1, r4, #0
 	movs r2, #0x1c
-	bl sub_0801D66C
+	bl _DmaCopy
 	ldrh r0, [r4, #0x14]
 	strh r0, [r5, #0x2e]
 	ldrh r0, [r4, #0x16]
diff --git a/asm/sub_0801D66C.s b/asm/sub_0801D66C.s
deleted file mode 100644
index 5976f92b..00000000
--- a/asm/sub_0801D66C.s
+++ /dev/null
@@ -1,56 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.syntax unified
-
-	.text
-	
-	thumb_func_start sub_0801D66C
-sub_0801D66C: @ 0x0801D66C
-	push {r4, lr}
-	adds r3, r0, #0
-	adds r4, r2, #0
-	adds r2, r3, #0
-	orrs r2, r1
-	orrs r2, r4
-	movs r0, #3
-	ands r2, r0
-	cmp r2, #0
-	beq _0801D686
-	cmp r2, #2
-	beq _0801D698
-	b _0801D6B0
-_0801D686:
-	ldr r2, _0801D694 @ =0x040000D4
-	str r3, [r2]
-	str r1, [r2, #4]
-	lsrs r0, r4, #2
-	movs r1, #0x84
-	lsls r1, r1, #0x18
-	b _0801D6A4
-	.align 2, 0
-_0801D694: .4byte 0x040000D4
-_0801D698:
-	ldr r2, _0801D6AC @ =0x040000D4
-	str r3, [r2]
-	str r1, [r2, #4]
-	lsrs r0, r4, #1
-	movs r1, #0x80
-	lsls r1, r1, #0x18
-_0801D6A4:
-	orrs r0, r1
-	str r0, [r2, #8]
-	ldr r0, [r2, #8]
-	b _0801D6BE
-	.align 2, 0
-_0801D6AC: .4byte 0x040000D4
-_0801D6B0:
-	ldrb r0, [r3]
-	strb r0, [r1]
-	adds r3, #1
-	adds r1, #1
-	subs r4, #1
-	cmp r4, #0
-	bne _0801D6B0
-_0801D6BE:
-	pop {r4, pc}	
\ No newline at end of file
diff --git a/asm/sub_08052418.s b/asm/sub_08052418.s
index f7bd8bd3..5e51b509 100644
--- a/asm/sub_08052418.s
+++ b/asm/sub_08052418.s
@@ -30,7 +30,7 @@ sub_08052418: @ 0x08052418
 	adds r0, r4, #0
 	mov r1, sp
 	movs r2, #0x18
-	bl sub_0801D66C
+	bl _DmaCopy
 	lsls r2, r6, #1
 	adds r2, r2, r6
 	lsls r2, r2, #2
diff --git a/asm/sub_0807CA18.s b/asm/sub_0807CA18.s
index b2c27a4b..c769da3b 100644
--- a/asm/sub_0807CA18.s
+++ b/asm/sub_0807CA18.s
@@ -54,7 +54,7 @@ _0807CA66:
 	bne _0807CA78
 	ldr r0, _0807CA80 @ =gUnk_0811E470
 	movs r2, #5
-	bl sub_0801D66C
+	bl _DmaCopy
 _0807CA78:
 	movs r0, #1
 	pop {pc}
diff --git a/linker.ld b/linker.ld
index 93819bfd..b95a6776 100644
--- a/linker.ld
+++ b/linker.ld
@@ -320,7 +320,6 @@ SECTIONS {
 		src/ezloNag.o(.text);
 		asm/code_0801CEC0.o(.text);
 		src/dma.o(.text);
-		asm/sub_0801D66C.o(.text);
 		src/input.o(.text);
 		src/code_0801D714.o(.text);
 		src/code_0801D79C.o(.text);
diff --git a/src/chooseFile.c b/src/chooseFile.c
index 0c5a9474..143819f2 100755
--- a/src/chooseFile.c
+++ b/src/chooseFile.c
@@ -55,7 +55,7 @@ static void sub_08050624(u32);
 static void sub_0805066C(void);
 static void sub_080507FC(void);
 
-extern void sub_0801D66C(const void* src, void* dest, u32 size);
+extern void _DmaCopy(const void* src, void* dest, u32 size);
 extern void sub_08056FEC(u32, struct_020227E8*);
 extern void sub_0805F46C(u32, struct_080FC844*);
 extern void sub_0801C4A0(u32, u32);
@@ -83,7 +83,7 @@ void sub_08050318(u32 arg0, u32 arg1) {
     struct_080FC844 var0;
 
     sub_08050384();
-    sub_0801D66C(&gUnk_080FC844, &var0, sizeof(gUnk_080FC844));
+    _DmaCopy(&gUnk_080FC844, &var0, sizeof(gUnk_080FC844));
     sub_08056FEC(arg1, &gUnk_020227E8);
     var0.unk10 |= gUnk_080FC85C[arg0][0] << 0xC;
     sub_0805F46C(gUnk_080FC85C[arg0][1], &var0);
@@ -136,7 +136,7 @@ void sub_0805041C(u32 saveFileId) {
     if (saveFileId < 3) {
         ((struct_02000000 *)0x2000000)->saveFileId = saveFileId;
         saveFile = &gSaveFiles[saveFileId];
-        sub_0801D66C(saveFile, &gUnk_02002A40, sizeof(*saveFile));
+        _DmaCopy(saveFile, &gUnk_02002A40, sizeof(*saveFile));
     }
     sub_080503E4(saveFileId);
 }
@@ -281,7 +281,7 @@ void sub_0805070C(void) {
             for (j = 0; j < 6; j++) {
                 sub_0805F7DC(playerName[j], var0);
             }
-            sub_0801D66C(var0->unk8, (void*)(OBJ_VRAM0 + 0x4000 + i * 0x200), 0x200);
+            _DmaCopy(var0->unk8, (void*)(OBJ_VRAM0 + 0x4000 + i * 0x200), 0x200);
         }
         sub_0805F300(var0);
     }
@@ -307,7 +307,7 @@ void sub_08050790(void) {
                 sub_0805F7DC(var1, var0);
                 var1++;
             }
-            sub_0801D66C(gUnk_02000D00, (void*)(BG_VRAM + i * 0x400), 0x400);
+            _DmaCopy(gUnk_02000D00, (void*)(BG_VRAM + i * 0x400), 0x400);
         }
         sub_0805F300(var0);
     }
diff --git a/src/code_0805436C.c b/src/code_0805436C.c
index 4999aef0..73e75668 100644
--- a/src/code_0805436C.c
+++ b/src/code_0805436C.c
@@ -160,7 +160,7 @@ void sub_08054524(void) {
         bVar1 = 0;
     }
 
-    sub_0801D66C(&gUnk_080015BC + gUnk_080FE1C6[bVar1] * 0x8, &gUnk_02034398, 0x20);
+    _DmaCopy(&gUnk_080015BC + gUnk_080FE1C6[bVar1] * 0x8, &gUnk_02034398, 0x20);
 }
 #else
 NAKED
diff --git a/src/dma.c b/src/dma.c
index 4f4f1dcb..37e33254 100644
--- a/src/dma.c
+++ b/src/dma.c
@@ -12,13 +12,12 @@ void _DmaFill32(u32 value, u8* dest, u32 size) {
     DmaFill32(3, value, dest, size);
 }
 
-void _DmaZero(u8 *src, u32 size)
-{
+void _DmaZero(u8* src, u32 size) {
     u32 zero = 0;
 
     switch (((u32)src | size) & 3) {
         case 0:
-            _DmaFill32(0,src, size);
+            _DmaFill32(0, src, size);
             break;
         case 2:
             _DmaFill16(0, src, size);
@@ -28,6 +27,23 @@ void _DmaZero(u8 *src, u32 size)
                 *src = zero;
                 src++;
                 size--;
-        } while (size != 0);
+            } while (size != 0);
     }
-}
\ No newline at end of file
+}
+
+void _DmaCopy(const u8* src, u8* dst, u32 size) {
+    switch (((u32)src | (u32)dst | size) & 3) {
+        case 0:
+            DmaCopy32(3, src, dst, size);
+            break;
+        case 2:
+            DmaCopy16(3, src, dst, size);
+            break;
+        default:
+            do {
+                *dst = *src;
+                src++;
+                dst++;
+            } while (--size);
+    }
+}
diff --git a/src/entity.c b/src/entity.c
index 056644bf..1b8d1cb1 100644
--- a/src/entity.c
+++ b/src/entity.c
@@ -193,16 +193,16 @@ void sub_0805E92C(u32 param_1) {
 }
 
 extern Entity gUnk_020369F0;
-extern void sub_0801D66C(const void* src, void* dest, size_t size); // dma copy
+extern void _DmaCopy(const void* src, void* dest, size_t size); // dma copy
 extern void sub_0805E98C(void);
 
 void sub_0805E958(void) {
-    sub_0801D66C(&gEntityLists, &gUnk_020369F0, 0x48);
+    _DmaCopy(&gEntityLists, &gUnk_020369F0, 0x48);
     sub_0805E98C();
 }
 
 void sub_0805E974(void) {
-    sub_0801D66C(&gUnk_020369F0, &gEntityLists, 0x48);
+    _DmaCopy(&gUnk_020369F0, &gEntityLists, 0x48);
 }
 
 void sub_0805E98C(void) {
diff --git a/src/mainLoop.c b/src/mainLoop.c
index c46fd8bf..3ad0eaae 100644
--- a/src/mainLoop.c
+++ b/src/mainLoop.c
@@ -8,7 +8,7 @@ extern void sub_0804FF84(u32);
 extern u16 gPaletteBuffer[];
 extern void VBlankInterruptWait(void);
 extern void DisableInterruptsAndDMA(void);
-extern void sub_0801D66C(void*, u8*, int);
+extern void _DmaCopy(void*, u8*, int);
 extern void sub_08016B34(void);
 
 static void sub_08055F70(void);
@@ -99,12 +99,12 @@ static void sub_08055F70(void) {
     _DmaZero(gUnk_02000030, size);
     size = (u32)gUnk_080B2CD8 - (u32)sub_080B197C;
     if (size != 0) {
-        sub_0801D66C(sub_080B197C, gUnk_030056F0, size);
+        _DmaCopy(sub_080B197C, gUnk_030056F0, size);
     }
 
     size = (u32)gUnk_080B2CD8_2 - (u32)gUnk_080B2CD8_3;
     if (size != 0) {
-        sub_0801D66C(gUnk_080B2CD8_3, gUnk_02038560, size);
+        _DmaCopy(gUnk_080B2CD8_3, gUnk_02038560, size);
     }
 
     sub_0801DA90(0);