diff --git a/asm/bigGoron.s b/asm/bigGoron.s
index 208b1c9f..0d3de49b 100644
--- a/asm/bigGoron.s
+++ b/asm/bigGoron.s
@@ -95,7 +95,7 @@ sub_0806D0B0: @ 0x0806D0B0
 	movs r1, #0x80
 	lsls r1, r1, #6
 	adds r0, r5, #0
-	bl sub_0801D630
+	bl _DmaZero
 	cmp r4, #0
 	beq _0806D0DA
 	adds r0, r4, #0
diff --git a/asm/code_08016DF8.s b/asm/code_08016DF8.s
index 312d0bdd..7b4a1a12 100644
--- a/asm/code_08016DF8.s
+++ b/asm/code_08016DF8.s
@@ -601,7 +601,7 @@ _08017268:
 	strb r5, [r0]
 	ldr r0, _080172EC @ =gUnk_03003BE0
 	movs r1, #0x8c
-	bl sub_0801D630
+	bl _DmaZero
 	adds r2, r4, #0
 	adds r2, #0x3f
 	ldrb r0, [r2]
@@ -1080,7 +1080,7 @@ sub_08017640: @ 0x08017640
 	movs r1, #0x80
 	lsls r1, r1, #1
 	adds r0, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08017664 @ =gUnk_02018EA0
 	str r4, [r0]
 	str r4, [r4]
diff --git a/asm/code_08018500.s b/asm/code_08018500.s
index 4d58f260..79dad55e 100644
--- a/asm/code_08018500.s
+++ b/asm/code_08018500.s
@@ -58,7 +58,7 @@ sub_0801855C: @ 0x0801855C
 	ldr r4, _08018570 @ =gUnk_02033AB8
 	adds r0, r4, #0
 	movs r1, #0x14
-	bl sub_0801D630
+	bl _DmaZero
 	adds r5, r4, #0
 	ldr r4, _08018574 @ =gUnk_080B3D20
 	movs r6, #0
diff --git a/asm/code_08019444.s b/asm/code_08019444.s
index f544c3a3..b2456684 100644
--- a/asm/code_08019444.s
+++ b/asm/code_08019444.s
@@ -3466,7 +3466,7 @@ _0801AE70:
 	movs r2, #0x80
 	lsls r2, r2, #4
 	movs r0, #0xf
-	bl sub_0801D5EC
+	bl _DmaFill16
 	movs r0, #1
 	rsbs r0, r0, #0
 	bl sub_0805BB74
diff --git a/asm/code_0801C370.s b/asm/code_0801C370.s
index c7600459..49e57eb3 100644
--- a/asm/code_0801C370.s
+++ b/asm/code_0801C370.s
@@ -32,7 +32,7 @@ _0801C398:
 	movs r1, #0xcd
 	lsls r1, r1, #2
 	adds r0, r5, #0
-	bl sub_0801D630
+	bl _DmaZero
 	strb r6, [r5, #3]
 	strh r4, [r5, #0xe]
 	ldr r0, _0801C474 @ =gUnk_02002A40
@@ -48,7 +48,7 @@ _0801C398:
 	movs r1, #0x80
 	lsls r1, r1, #4
 	adds r0, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r1, _0801C47C @ =gScreen
 	str r4, [r1, #0x10]
 	ldr r0, _0801C480 @ =0x00001F0C
@@ -93,7 +93,7 @@ _0801C398:
 	adds r0, #0x34
 	movs r1, #0xc0
 	lsls r1, r1, #2
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #5
 	movs r1, #9
 	bl sub_0801CA6C
diff --git a/asm/code_0801C85C.s b/asm/code_0801C85C.s
index d7dcbc9e..598c3b14 100644
--- a/asm/code_0801C85C.s
+++ b/asm/code_0801C85C.s
@@ -996,7 +996,7 @@ sub_0801CFA8: @ 0x0801CFA8
 	adds r5, r0, #0
 	ldr r0, _0801CFCC @ =gUnk_02001A00
 	movs r1, #0x40
-	bl sub_0801D630
+	bl _DmaZero
 	movs r4, #0
 _0801CFB6:
 	adds r0, r4, #0
@@ -1451,7 +1451,7 @@ sub_0801D2C8: @ 0x0801D2C8
 	lsls r1, r4, #5
 	adds r1, r1, r2
 	movs r2, #0x20
-	bl sub_0801D5EC
+	bl _DmaFill16
 	b _0801D33C
 	.align 2, 0
 _0801D2F8: .4byte gUnk_0200B644
diff --git a/asm/code_0801D79C.s b/asm/code_0801D79C.s
index 2c808e0e..776ee624 100644
--- a/asm/code_0801D79C.s
+++ b/asm/code_0801D79C.s
@@ -339,7 +339,7 @@ _0801D9D8:
 	strh r0, [r3]
 	adds r0, r4, #0
 	mov r1, ip
-	bl sub_0801D630
+	bl _DmaZero
 	adds r0, r4, #0
 	b _0801DA02
 	.align 2, 0
@@ -418,7 +418,7 @@ sub_0801DA7C: @ 0x0801DA7C
 	ldr r0, _0801DA8C @ =gUnk_02035540
 	movs r1, #0x80
 	lsls r1, r1, #5
-	bl sub_0801D630
+	bl _DmaZero
 	pop {pc}
 	.align 2, 0
 _0801DA8C: .4byte gUnk_02035540
@@ -459,11 +459,11 @@ sub_0801DA90: @ 0x0801DA90
 	bl sub_0801DB34
 	ldr r0, _0801DB08 @ =0x0600C000
 	movs r1, #0x20
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0801DB0C @ =gUnk_02034CB0
 	movs r1, #0x80
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	strh r4, [r5, #0xe]
 	pop {r4, r5, pc}
 	.align 2, 0
@@ -505,7 +505,7 @@ sub_0801DB34: @ 0x0801DB34
 	ldr r4, _0801DB6C @ =gScreen
 	adds r0, r4, #0
 	movs r1, #0x7c
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0801DB70 @ =gUnk_02034CB0
 	str r0, [r4, #0x10]
 	ldr r0, _0801DB74 @ =0x00001F0C
@@ -560,7 +560,7 @@ sub_0801DBA0: @ 0x0801DBA0
 	adds r5, r1, #0
 	adds r1, r2, #0
 	adds r0, r5, #0
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #1
 	strb r0, [r5]
 	ldr r2, _0801DBE4 @ =gUnk_030010A0
@@ -835,7 +835,7 @@ _0801DDB8:
 	ldr r0, _0801DDE0 @ =gUnk_02019EE0
 	movs r1, #0x80
 	lsls r1, r1, #8
-	bl sub_0801D630
+	bl _DmaZero
 	b _0801DEE2
 	.align 2, 0
 _0801DDD8: .4byte gUnk_080C9C50
@@ -1104,7 +1104,7 @@ sub_0801DFB4: @ 0x0801DFB4
 	ldr r7, _0801E004 @ =gUnk_02022740
 	adds r0, r7, #0
 	movs r1, #0x10
-	bl sub_0801D630
+	bl _DmaZero
 	strh r4, [r7, #6]
 	strh r5, [r7, #8]
 	strh r6, [r7, #0xa]
@@ -1345,7 +1345,7 @@ sub_0801E160: @ 0x0801E160
 	adds r0, r0, r4
 	movs r1, #0xa0
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	adds r0, r6, #0
 	mov r1, r8
 	mov r2, sb
@@ -1415,7 +1415,7 @@ sub_0801E1EC: @ 0x0801E1EC
 	adds r0, r0, r5
 	movs r1, #0xa0
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	adds r0, r4, #0
 	movs r1, #0
 	bl sub_0801E24C
@@ -1579,7 +1579,7 @@ sub_0801E31C: @ 0x0801E31C
 	adds r0, r0, r1
 	movs r1, #0xa0
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	cmp sl, sb
 	bge _0801E3DC
 	movs r6, #0
@@ -1764,7 +1764,7 @@ sub_0801E49C: @ 0x0801E49C
 	movs r2, #0xf0
 	lsls r2, r2, #3
 	ldr r1, _0801E5E8 @ =gUnk_02018EE0
-	bl sub_0801D5EC
+	bl _DmaFill16
 	adds r3, r5, #0
 	subs r3, #0x40
 	movs r2, #0xff
@@ -1874,7 +1874,7 @@ sub_0801E49C: @ 0x0801E49C
 	adds r0, r0, r6
 	movs r1, #0xa0
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r2, _0801E5E8 @ =gUnk_02018EE0
 	ldrb r1, [r5]
 	lsls r0, r1, #2
diff --git a/asm/code_0804AA84.s b/asm/code_0804AA84.s
index e0e7dea7..73e93d4e 100644
--- a/asm/code_0804AA84.s
+++ b/asm/code_0804AA84.s
@@ -54,7 +54,7 @@ sub_0804AAD4: @ 0x0804AAD4
 	ldr r4, _0804AAFC @ =gUnk_02018EB0
 	adds r0, r4, #0
 	movs r1, #0x28
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #0
 	str r0, [r4, #0x14]
 	bl sub_0805E60C
diff --git a/asm/code_0804B9F8.s b/asm/code_0804B9F8.s
index acde102d..d5601372 100644
--- a/asm/code_0804B9F8.s
+++ b/asm/code_0804B9F8.s
@@ -11466,10 +11466,10 @@ sub_0804FFE4: @ 0x0804FFE4
 	ldr r4, _08050000 @ =gUnk_03000FD0
 	adds r0, r4, #0
 	movs r1, #0x1c
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08050004 @ =gUnk_020354C0
 	movs r1, #0x80
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #1
 	rsbs r0, r0, #0
 	str r0, [r4, #4]
diff --git a/asm/code_08050038.s b/asm/code_08050038.s
index 924795b8..e9e1723f 100644
--- a/asm/code_08050038.s
+++ b/asm/code_08050038.s
@@ -460,7 +460,7 @@ sub_08050384: @ 0x08050384
 	ldr r0, _080503A0 @ =gUnk_02034CB0
 	movs r1, #0x80
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r1, _080503A4 @ =gScreen
 	movs r0, #1
 	strh r0, [r1, #0xe]
@@ -490,10 +490,10 @@ sub_080503BC: @ 0x080503BC
 	movs r4, #0x80
 	lsls r4, r4, #4
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080503E0 @ =gUnk_02021F30
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	pop {r4, pc}
 	.align 2, 0
 _080503D8: .4byte gUnk_02032EC0
@@ -583,7 +583,7 @@ sub_08050450: @ 0x08050450
 	strh r0, [r1, #0x24]
 	ldr r0, _080504E8 @ =gUnk_02000080
 	movs r1, #0x30
-	bl sub_0801D630
+	bl _DmaZero
 _0805048A:
 	bl sub_080507FC
 	ldr r1, _080504EC @ =gUnk_080FC8B0
@@ -632,7 +632,7 @@ sub_080504F4: @ 0x080504F4
 	movs r0, #0xc0
 	lsls r0, r0, #0x13
 	movs r1, #0x80
-	bl sub_0801D630
+	bl _DmaZero
 	bl sub_08056418
 	bl sub_0805E60C
 	bl sub_08080668
@@ -642,11 +642,11 @@ sub_080504F4: @ 0x080504F4
 	ldr r0, _080505DC @ =gUnk_0200AF00
 	movs r1, #0xcd
 	lsls r1, r1, #2
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r4, _080505E0 @ =gUnk_02019EE0
 	ldr r1, _080505E4 @ =0x00000E28
 	adds r0, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #7
 	strb r0, [r4, #3]
 	movs r0, #0x80
@@ -662,7 +662,7 @@ _08050546:
 	movs r1, #0xed
 	lsls r1, r1, #2
 	adds r0, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #8
 	strb r0, [r4, #2]
 	movs r0, #0
@@ -887,7 +887,7 @@ _08050732:
 	ldr r0, [r5, #8]
 	movs r1, #0x80
 	lsls r1, r1, #2
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08050784 @ =0x000004B4
 	adds r1, r6, #0
 	muls r1, r0, r1
@@ -1387,7 +1387,7 @@ sub_08050AFC: @ 0x08050AFC
 	movs r1, #0x80
 	lsls r1, r1, #4
 	adds r0, r5, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08050B34 @ =gUnk_02019EE0
 	adds r0, #8
 	adds r4, r4, r0
@@ -1717,7 +1717,7 @@ sub_08050DB8: @ 0x08050DB8
 	ldr r0, _08050DDC @ =gUnk_020344B0
 	movs r1, #0x80
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #0xc
 	bl sub_080503A8
 	ldr r1, _08050DE0 @ =gUnk_02000080
@@ -3240,7 +3240,7 @@ sub_0805194C: @ 0x0805194C
 	adds r3, #0xc
 	adds r4, r4, r3
 	adds r0, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #1
 	strb r0, [r4, #2]
 	strb r0, [r4, #3]
@@ -3291,7 +3291,7 @@ sub_080519B0: @ 0x080519B0
 	ldr r4, _08051A08 @ =gUnk_030010A0
 	adds r0, r4, #0
 	movs r1, #0xb0
-	bl sub_0801D630
+	bl _DmaZero
 	bl sub_08049CD4
 	bl sub_080300AC
 	bl sub_0807CA18
@@ -3326,11 +3326,11 @@ sub_08051A14: @ 0x08051A14
 	str r0, [r1, #4]
 	ldr r0, _08051A74 @ =gUnk_03000000
 	ldr r1, _08051A78 @ =0x00000B74
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08051A7C @ =gUnk_02032EC0
 	movs r1, #0xed
 	lsls r1, r1, #2
-	bl sub_0801D630
+	bl _DmaZero
 	bl sub_0805E60C
 	bl sub_080197AC
 	bl sub_08080668
@@ -3984,10 +3984,10 @@ sub_08052010: @ 0x08052010
 	movs r4, #0x80
 	lsls r4, r4, #4
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08052080 @ =gUnk_020344B0
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	bl sub_080A4D34
 	movs r0, #0xa
 	bl LoadPalettesByPaletteGroupIndex
@@ -3999,10 +3999,10 @@ sub_08052010: @ 0x08052010
 	movs r0, #0xc0
 	lsls r0, r0, #0x13
 	movs r1, #0x20
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08052084 @ =gUnk_02000080
 	movs r1, #0x30
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r1, _08052088 @ =gScreen
 	ldrh r2, [r1]
 	movs r3, #0x80
diff --git a/asm/code_080526F8.s b/asm/code_080526F8.s
index 958ca623..02c10ab6 100644
--- a/asm/code_080526F8.s
+++ b/asm/code_080526F8.s
@@ -791,7 +791,7 @@ sub_08052CFC: @ 0x08052CFC
 	ldr r4, _08052D44 @ =gArea
 	ldr r1, _08052D48 @ =0x00000894
 	adds r0, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08052D4C @ =gRoomControls
 	ldrb r1, [r0, #4]
 	lsls r1, r1, #2
@@ -996,7 +996,7 @@ sub_08052EA0: @ 0x08052EA0
 	ldr r4, _08052EE4 @ =gRoomVars
 	adds r0, r4, #0
 	movs r1, #0xcc
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #0xff
 	strb r0, [r4, #0x10]
 	strb r0, [r4, #0x11]
@@ -1178,7 +1178,7 @@ sub_08052FF4: @ 0x08052FF4
 	ldr r5, _08053074 @ =gUnk_020342CC
 	adds r0, r5, #0
 	movs r1, #0x20
-	bl sub_0801D630
+	bl _DmaZero
 	str r5, [r5, #0x20]
 	ldr r0, _08053078 @ =gUnk_0811E214
 	lsls r6, r6, #2
@@ -1570,17 +1570,17 @@ sub_08053320: @ 0x08053320
 	movs r4, #0x80
 	lsls r4, r4, #4
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08053380 @ =gUnk_02021F30
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08053384 @ =gUnk_020344B0
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08053388 @ =gUnk_02001A40
 	movs r1, #0x80
 	lsls r1, r1, #5
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #0x10
 	bl sub_0801D7EC
 	movs r0, #0x17
@@ -2222,7 +2222,7 @@ sub_08053800: @ 0x08053800
 	ldr r0, _08053888 @ =gUnk_02021F30
 	movs r1, #0x80
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0805388C @ =0x00000F01
 	adds r5, r5, r0
 	ldr r1, [r4]
diff --git a/asm/code_08055FF4.s b/asm/code_08055FF4.s
index 40a852d4..2be77ac1 100644
--- a/asm/code_08055FF4.s
+++ b/asm/code_08055FF4.s
@@ -156,7 +156,7 @@ _08056112:
 	ldr r4, _0805612C @ =gUnk_02000010
 	adds r0, r4, #0
 	movs r1, #0x20
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08056130 @ =0x4D435A33
 	str r0, [r4]
 _08056124:
diff --git a/asm/code_08056418.s b/asm/code_08056418.s
index 1bb89be1..78e1d68d 100644
--- a/asm/code_08056418.s
+++ b/asm/code_08056418.s
@@ -16,7 +16,7 @@ sub_08056458: @ 0x08056458
 	bne _08056470
 	ldr r0, _08056488 @ =gUnk_02022780
 	movs r1, #0xa8
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #1
 	bl sub_080564C8
 _08056470:
@@ -91,14 +91,14 @@ sub_080564EC: @ 0x080564EC
 	push {r4, lr}
 	ldr r0, _08056598 @ =gUnk_02036A40
 	movs r1, #8
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0805659C @ =gUnk_02024030
 	movs r1, #0x18
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r4, _080565A0 @ =gUnk_02022780
 	adds r0, r4, #0
 	movs r1, #0xa8
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080565A4 @ =gTextBox
 	adds r1, r4, #0
 	movs r2, #0x20
@@ -572,11 +572,11 @@ _080568B2:
 	beq _080568D2
 	adds r0, r6, #0
 	movs r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r4, _08056910 @ =gUnk_02024030
 	adds r0, r4, #0
 	movs r1, #0x18
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #1
 	strb r0, [r4]
 	strb r0, [r6]
@@ -777,7 +777,7 @@ _08056A30:
 	movs r1, #3
 	strb r1, [r2]
 	movs r1, #0x18
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #0x6a
 	bl PlaySFX
 	adds r1, r6, #0
diff --git a/asm/code_0805E3B0.s b/asm/code_0805E3B0.s
index a269d7ca..a39b6514 100644
--- a/asm/code_0805E3B0.s
+++ b/asm/code_0805E3B0.s
@@ -360,15 +360,15 @@ sub_0805E60C: @ 0x0805E60C
 	bl sub_0805E89C
 	ldr r0, _0805E654 @ =gUnk_03003DC0
 	movs r1, #0xc
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0805E658 @ =gLinkEntity
 	movs r1, #0xaa
 	lsls r1, r1, #6
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0805E65C @ =gUnk_02033290
 	movs r1, #0x80
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	bl sub_0805E98C
 	ldr r0, _0805E660 @ =gUnk_03003DBC
 	movs r1, #0
diff --git a/asm/code_0805E744.s b/asm/code_0805E744.s
index ffa1ec47..c6194d3e 100644
--- a/asm/code_0805E744.s
+++ b/asm/code_0805E744.s
@@ -252,7 +252,7 @@ sub_0805E900: @ 0x0805E900
 	bl sub_0805EA98
 	adds r0, r4, #0
 	movs r1, #0x40
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r1, _0805E928 @ =gUnk_020354B4
 	ldrb r0, [r1]
 	subs r0, #1
@@ -1594,7 +1594,7 @@ _0805F2D0:
 	bne _0805F2F0
 	adds r0, r5, #0
 	movs r1, #0xc
-	bl sub_0801D630
+	bl _DmaZero
 	ldrb r0, [r4]
 	movs r1, #1
 	orrs r0, r1
@@ -1624,7 +1624,7 @@ _0805F308:
 	cmp r0, r2
 	bne _0805F318
 	movs r1, #0xc
-	bl sub_0801D630
+	bl _DmaZero
 	b _0805F320
 	.align 2, 0
 _0805F314: .4byte gUnk_02036540
@@ -1787,7 +1787,7 @@ sub_0805F440: @ 0x0805F440
 	adds r4, r0, #0
 	adds r5, r1, #0
 	movs r1, #0x30
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0805F45C @ =0x0000FFFF
 	cmp r5, r0
 	bls _0805F460
@@ -1965,7 +1965,7 @@ _0805F596:
 _0805F59E:
 	ldr r0, _0805F5C8 @ =gUnk_02034330
 	movs r1, #0x18
-	bl sub_0801D630
+	bl _DmaZero
 _0805F5A6:
 	mov r0, sb
 	mov r1, sp
@@ -2562,11 +2562,11 @@ sub_0805FA04: @ 0x0805FA04
 	ldr r0, _0805FA78 @ =gUnk_02034CB0
 	movs r1, #0x80
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0805FA7C @ =gUnk_02001A40
 	movs r1, #0x80
 	lsls r1, r1, #5
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0805FA80 @ =gScreen
 	movs r2, #0
 	movs r1, #0x94
@@ -2585,11 +2585,11 @@ sub_0805FA04: @ 0x0805FA04
 	ldr r0, _0805FA88 @ =gUnk_02032EC0
 	movs r1, #0xed
 	lsls r1, r1, #2
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r4, _0805FA8C @ =gUnk_02000080
 	adds r0, r4, #0
 	movs r1, #0x30
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #0x80
 	lsls r0, r0, #0x12
 	ldrb r0, [r0, #7]
diff --git a/asm/code_0806ED78.s b/asm/code_0806ED78.s
index b3d78b6c..6efd6e68 100644
--- a/asm/code_0806ED78.s
+++ b/asm/code_0806ED78.s
@@ -842,7 +842,7 @@ sub_0806F364: @ 0x0806F364
 	adds r1, r2, r3
 	adds r0, r0, r1
 	movs r1, #0x10
-	bl sub_0801D630
+	bl _DmaZero
 	pop {pc}
 	.align 2, 0
 _0806F384: .4byte gArea
diff --git a/asm/code_0806FA6C.s b/asm/code_0806FA6C.s
index 09bac7ac..893ae0f3 100644
--- a/asm/code_0806FA6C.s
+++ b/asm/code_0806FA6C.s
@@ -385,7 +385,7 @@ sub_0806FD8C: @ 0x0806FD8C
 	ldr r0, _0806FD9C @ =gUnk_020000C0
 	movs r1, #0xc0
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	pop {pc}
 	.align 2, 0
 _0806FD9C: .4byte gUnk_020000C0
@@ -534,7 +534,7 @@ _0806FE9E:
 	bls _0806FE9E
 	adds r0, r6, #0
 	movs r1, #0x40
-	bl sub_0801D630
+	bl _DmaZero
 _0806FEB4:
 	pop {r4, r5, r6, pc}
 	.align 2, 0
@@ -1454,7 +1454,7 @@ sub_0807059C: @ 0x0807059C
 	push {lr}
 	ldr r0, _080705A8 @ =gUnk_02034490
 	movs r1, #0x18
-	bl sub_0801D630
+	bl _DmaZero
 	pop {pc}
 	.align 2, 0
 _080705A8: .4byte gUnk_02034490
diff --git a/asm/code_080732D0.s b/asm/code_080732D0.s
index 2974abfd..9a98dc36 100644
--- a/asm/code_080732D0.s
+++ b/asm/code_080732D0.s
@@ -4198,7 +4198,7 @@ sub_080751E8: @ 0x080751E8
 	ldr r4, _08075230 @ =gUnk_02022750
 	adds r0, r4, #0
 	movs r1, #0x24
-	bl sub_0801D630
+	bl _DmaZero
 	str r6, [r4]
 	ldr r0, _08075234 @ =gLinkEntity
 	adds r0, #0x84
diff --git a/asm/code_08077B98.s b/asm/code_08077B98.s
index da1b72eb..2b863d36 100644
--- a/asm/code_08077B98.s
+++ b/asm/code_08077B98.s
@@ -642,7 +642,7 @@ sub_080784C8: @ 0x080784C8
 	movs r1, #0xc4
 	lsls r1, r1, #1
 	adds r0, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080784E0 @ =gUnk_0811C000
 	str r0, [r4, #4]
 	pop {r4, pc}
diff --git a/asm/code_08078778.s b/asm/code_08078778.s
index eab905d0..56747830 100644
--- a/asm/code_08078778.s
+++ b/asm/code_08078778.s
@@ -70,7 +70,7 @@ sub_080788E0: @ 0x080788E0
 	ldr r1, _08078900 @ =gUnk_03003DF8
 	adds r0, r0, r1
 	movs r1, #0xc
-	bl sub_0801D630
+	bl _DmaZero
 _080788FC:
 	pop {pc}
 	.align 2, 0
@@ -542,7 +542,7 @@ sub_08078C24: @ 0x08078C24
 	ldr r0, _08078CB0 @ =gUnk_03003DF0
 	movs r1, #0xc4
 	lsls r1, r1, #1
-	bl sub_0801D630
+	bl _DmaZero
 	pop {pc}
 	.align 2, 0
 _08078CAC: .4byte gLinkState
diff --git a/asm/code_0807B9B8.s b/asm/code_0807B9B8.s
index 9a17aa0a..24a845bd 100644
--- a/asm/code_0807B9B8.s
+++ b/asm/code_0807B9B8.s
@@ -822,14 +822,14 @@ sub_0807BFD0: @ 0x0807BFD0
 	adds r0, r7, #0
 	adds r1, r6, #0
 	mov r2, r8
-	bl sub_0801D5EC
+	bl _DmaFill16
 	movs r5, #0
 	strh r5, [r6]
 	ldr r4, _0807C0C0 @ =gUnk_02010654
 	adds r0, r7, #0
 	adds r1, r4, #0
 	mov r2, r8
-	bl sub_0801D5EC
+	bl _DmaFill16
 	strh r5, [r4]
 	ldr r2, _0807C0C4 @ =gRoomControls
 	ldr r0, _0807C0C8 @ =gArea
@@ -873,7 +873,7 @@ _0807C04E:
 	adds r0, r7, #0
 	adds r1, r6, #0
 	mov r2, r8
-	bl sub_0801D5EC
+	bl _DmaFill16
 	movs r2, #0
 	ldr r3, _0807C0D8 @ =0x000007FF
 	adds r4, r7, #0
@@ -899,7 +899,7 @@ _0807C078:
 	ldr r4, _0807C0B8 @ =0x0000FFFF
 	adds r0, r4, #0
 	adds r1, r6, #0
-	bl sub_0801D5EC
+	bl _DmaFill16
 	movs r2, #0
 	ldr r3, _0807C0D8 @ =0x000007FF
 _0807C096:
@@ -948,19 +948,19 @@ sub_0807C0DC: @ 0x0807C0DC
 	lsls r6, r6, #6
 	adds r0, r5, #0
 	adds r1, r6, #0
-	bl sub_0801D630
+	bl _DmaZero
 	adds r0, r5, r6
 	movs r1, #0x80
 	lsls r1, r1, #5
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0807C160 @ =gUnk_02019EE0
 	movs r4, #0x80
 	lsls r4, r4, #8
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0807C164 @ =gUnk_02002F00
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0807C168 @ =gArea
 	ldr r1, _0807C16C @ =0x0000085C
 	adds r0, r0, r1
@@ -999,7 +999,7 @@ _0807C174: .4byte 0x0000FFFF
 _0807C178:
 	adds r0, r2, #4
 	adds r1, r6, #0
-	bl sub_0801D630
+	bl _DmaZero
 	movs r3, #1
 	mov sb, r3
 _0807C184:
@@ -1167,7 +1167,7 @@ _0807C2E4:
 	bl sub_0807C5F4
 	adds r0, r5, #0
 	adds r1, r6, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r4, _0807C350 @ =gUnk_02002F00
 	adds r5, r4, r6
 	adds r0, r4, #0
@@ -1179,7 +1179,7 @@ _0807C2E4:
 	bl sub_0807C5F4
 	adds r0, r5, #0
 	adds r1, r6, #0
-	bl sub_0801D630
+	bl _DmaZero
 _0807C326:
 	mov r1, sb
 	cmp r1, #0
@@ -1406,10 +1406,10 @@ sub_0807C4F8: @ 0x0807C4F8
 	movs r4, #0x80
 	lsls r4, r4, #8
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0807C59C @ =gUnk_02002F00
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r5, _0807C5A0 @ =gUnk_02022830
 	ldr r0, _0807C5A4 @ =gArea
 	ldr r1, _0807C5A8 @ =0x0000085C
@@ -1455,7 +1455,7 @@ _0807C54A:
 	bl sub_0807C5F4
 	adds r0, r5, #0
 	adds r1, r6, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r4, _0807C59C @ =gUnk_02002F00
 	adds r5, r4, r6
 	adds r0, r4, #0
@@ -1467,7 +1467,7 @@ _0807C54A:
 	bl sub_0807C5F4
 	adds r0, r5, #0
 	adds r1, r6, #0
-	bl sub_0801D630
+	bl _DmaZero
 _0807C592:
 	pop {r4, r5, r6, pc}
 	.align 2, 0
@@ -1694,7 +1694,7 @@ _0807C710:
 _0807C726:
 	adds r0, r4, #0
 	movs r1, #0x40
-	bl sub_0801D630
+	bl _DmaZero
 	adds r4, #0x40
 	adds r5, #1
 	cmp r5, r7
@@ -1984,7 +1984,7 @@ _0807C92E:
 _0807C946:
 	adds r0, r4, #0
 	movs r1, #0x80
-	bl sub_0801D630
+	bl _DmaZero
 	adds r4, #0x80
 	adds r5, #1
 	cmp r5, r6
diff --git a/asm/code_0807CC3C.s b/asm/code_0807CC3C.s
index fa29b577..fc5fa1d1 100644
--- a/asm/code_0807CC3C.s
+++ b/asm/code_0807CC3C.s
@@ -1773,14 +1773,14 @@ sub_0807DA70: @ 0x0807DA70
 	ldr r4, _0807DA94 @ =gUnk_02033280
 	adds r0, r4, #0
 	movs r1, #0xc
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0807DA98 @ =gUnk_02036570
 	movs r1, #0x90
 	lsls r1, r1, #3
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0807DA9C @ =gUnk_02022750
 	movs r1, #0x24
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #8
 	strb r0, [r4, #8]
 	pop {r4, pc}
@@ -1816,7 +1816,7 @@ _0807DAC2:
 sub_0807DAC4: @ 0x0807DAC4
 	push {lr}
 	movs r1, #0x24
-	bl sub_0801D630
+	bl _DmaZero
 	pop {pc}
 	.align 2, 0
 
@@ -1880,7 +1880,7 @@ StartPlayerScript: @ 0x0807DB2C
 	ldr r4, _0807DB5C @ =gUnk_02022750
 	adds r0, r4, #0
 	movs r1, #0x24
-	bl sub_0801D630
+	bl _DmaZero
 	str r5, [r4]
 	ldr r0, _0807DB60 @ =gLinkEntity
 	adds r0, #0x84
@@ -1927,7 +1927,7 @@ sub_0807DB88: @ 0x0807DB88
 	adds r4, r0, #0
 	adds r5, r1, #0
 	movs r1, #0x24
-	bl sub_0801D630
+	bl _DmaZero
 	str r5, [r4]
 	pop {r4, r5, pc}
 
@@ -7919,11 +7919,11 @@ sub_08080668: @ 0x08080668
 	ldr r5, _080806A4 @ =gRoomControls
 	adds r0, r5, #0
 	movs r1, #0x38
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r4, _080806A8 @ =gUnk_03004030
 	adds r0, r4, #0
 	movs r1, #0xc
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080806AC @ =0x0000FFFF
 	strh r0, [r5, #0x22]
 	movs r0, #0xff
@@ -7935,10 +7935,10 @@ sub_08080668: @ 0x08080668
 	movs r4, #0x80
 	lsls r4, r4, #8
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080806B8 @ =gUnk_02002F00
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	pop {r4, r5, pc}
 	.align 2, 0
 _080806A4: .4byte gRoomControls
diff --git a/asm/code_080A29BC.s b/asm/code_080A29BC.s
index 88c1490b..a7eab04d 100644
--- a/asm/code_080A29BC.s
+++ b/asm/code_080A29BC.s
@@ -995,7 +995,7 @@ sub_080A3210: @ 0x080A3210
 	ldr r4, _080A3230 @ =gUnk_02021EE0
 	adds r0, r4, #0
 	movs r1, #0x18
-	bl sub_0801D630
+	bl _DmaZero
 	bl sub_080A35C8
 	movs r0, #0x80
 	lsls r0, r0, #1
diff --git a/asm/code_080A3480.s b/asm/code_080A3480.s
index b95cc3b4..0e29f5f1 100644
--- a/asm/code_080A3480.s
+++ b/asm/code_080A3480.s
@@ -354,7 +354,7 @@ sub_080A36F8: @ 0x080A36F8
 	ldr r0, _080A3760 @ =gUnk_02021F30
 	movs r1, #0x80
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r1, _080A3764 @ =gScreen
 	movs r2, #0
 	movs r0, #1
@@ -410,7 +410,7 @@ _080A378A:
 	ldr r0, _080A37B8 @ =gUnk_02021F30
 	movs r1, #0x80
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	movs r1, #0x10
 	ldrsh r0, [r4, r1]
 	ldr r2, _080A37BC @ =gUnk_081272E0
@@ -580,7 +580,7 @@ sub_080A38D0: @ 0x080A38D0
 	movs r6, #0x80
 	lsls r6, r6, #4
 	adds r1, r6, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r4, _080A3924 @ =gScreen
 	movs r0, #0
 	mov r8, r0
@@ -588,7 +588,7 @@ sub_080A38D0: @ 0x080A38D0
 	strh r5, [r4, #0x1a]
 	ldr r0, _080A3928 @ =gUnk_020344B0
 	adds r1, r6, #0
-	bl sub_0801D630
+	bl _DmaZero
 	strh r5, [r4, #0x26]
 	adds r4, #0x68
 	movs r0, #0x80
@@ -712,7 +712,7 @@ _080A39C8:
 	movs r0, #0xc0
 	lsls r0, r0, #0x13
 	movs r1, #0x20
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #0
 	movs r1, #0
 	bl sub_08052418
diff --git a/asm/code_080A3BD0.s b/asm/code_080A3BD0.s
index 622d80ca..59aecd61 100644
--- a/asm/code_080A3BD0.s
+++ b/asm/code_080A3BD0.s
@@ -1003,7 +1003,7 @@ sub_080A4398: @ 0x080A4398
 	push {lr}
 	ldr r0, _080A43A4 @ =gUnk_02019EE0
 	movs r1, #0x40
-	bl sub_0801D630
+	bl _DmaZero
 	pop {pc}
 	.align 2, 0
 _080A43A4: .4byte gUnk_02019EE0
@@ -1187,7 +1187,7 @@ sub_080A44E0: @ 0x080A44E0
 	mov r8, r0
 	ldr r0, [r4, #8]
 	mov r1, r8
-	bl sub_0801D630
+	bl _DmaZero
 	adds r0, r6, #0
 	adds r1, r4, #0
 	bl sub_0805F76C
@@ -1337,11 +1337,11 @@ sub_080A4608: @ 0x080A4608
 	ldr r0, _080A46A4 @ =gUnk_02034CB0
 	movs r1, #0x80
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080A46A8 @ =gUnk_02001A40
 	movs r1, #0x80
 	lsls r1, r1, #5
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r2, _080A46AC @ =gScreen
 	adds r1, r2, #0
 	adds r1, #0x58
@@ -2044,7 +2044,7 @@ sub_080A4BA0: @ 0x080A4BA0
 	adds r6, r1, #0
 	add r0, sp, #0x18
 	movs r1, #0x30
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080A4C08 @ =gUnk_0812816C
 	mov r1, sp
 	movs r2, #0x18
@@ -2130,7 +2130,7 @@ _080A4C3E:
 _080A4C56:
 	ldr r1, [sp]
 	movs r2, #0x80
-	bl sub_0801D5EC
+	bl _DmaFill16
 	cmp r5, #0
 	ble _080A4CAC
 	ldr r0, _080A4C9C @ =0x00007FFF
@@ -2191,7 +2191,7 @@ sub_080A4CBC: @ 0x080A4CBC
 	lsls r5, r5, #4
 	adds r0, r4, #0
 	adds r1, r5, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r1, _080A4D14 @ =0x0600E000
 	adds r0, r4, #0
 	adds r2, r5, #0
@@ -2285,7 +2285,7 @@ sub_080A4D88: @ 0x080A4D88
 	push {lr}
 	ldr r0, _080A4DA4 @ =gUnk_020344A0
 	movs r1, #8
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #1
 	movs r1, #0
 	bl sub_080A7138
@@ -2313,21 +2313,21 @@ sub_080A4DB8: @ 0x080A4DB8
 	movs r4, #0x80
 	lsls r4, r4, #4
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080A4E5C @ =gUnk_02021F30
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080A4E60 @ =gUnk_020344B0
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080A4E64 @ =gUnk_0200AF34
 	movs r1, #0xc0
 	lsls r1, r1, #2
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r4, _080A4E68 @ =gUnk_02000080
 	adds r0, r4, #0
 	movs r1, #0x30
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080A4E6C @ =0x0000FFFF
 	strh r0, [r4, #0x2e]
 	ldr r0, _080A4E70 @ =gUnk_02034490
@@ -2648,7 +2648,7 @@ _080A5080:
 	ldr r0, _080A5098 @ =gUnk_02034CB0
 	movs r1, #0x80
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r1, _080A509C @ =gScreen
 	movs r0, #1
 	strh r0, [r1, #0xe]
diff --git a/asm/code_080A5574.s b/asm/code_080A5574.s
index 239efe6b..93865266 100644
--- a/asm/code_080A5574.s
+++ b/asm/code_080A5574.s
@@ -2458,7 +2458,7 @@ _080A6886:
 	ldr r0, _080A68D0 @ =gUnk_02019EE0
 	movs r1, #0x80
 	lsls r1, r1, #3
-	bl sub_0801D630
+	bl _DmaZero
 	pop {r4, r5, r6, r7, pc}
 	.align 2, 0
 _080A68AC: .4byte gUnk_02032EC0
@@ -2806,7 +2806,7 @@ sub_080A6B04: @ 0x080A6B04
 	ldr r1, _080A6C08 @ =gUnk_02001A40
 	movs r2, #0x80
 	lsls r2, r2, #5
-	bl sub_0801D5EC
+	bl _DmaFill16
 	ldr r0, _080A6C0C @ =gLinkState
 	ldr r0, [r0, #0x30]
 	movs r1, #8
@@ -3323,7 +3323,7 @@ sub_080A6F6C: @ 0x080A6F6C
 	ldr r0, _080A6FA8 @ =gUnk_020350F0
 	movs r1, #0x80
 	lsls r1, r1, #1
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #0xff
 	ands r0, r4
 	cmp r0, #0
@@ -3392,7 +3392,7 @@ _080A6FFA:
 	ldr r0, _080A7038 @ =gUnk_020350F0
 	movs r1, #0x80
 	lsls r1, r1, #1
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #0xff
 	ands r0, r4
 	cmp r0, #0
@@ -3429,7 +3429,7 @@ sub_080A7040: @ 0x080A7040
 	movs r1, #0xc0
 	lsls r1, r1, #2
 	adds r0, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080A7098 @ =0xFFFFFE00
 	adds r4, r4, r0
 	ldr r1, _080A709C @ =0x0600E000
@@ -3472,7 +3472,7 @@ sub_080A70AC: @ 0x080A70AC
 	movs r1, #0xc0
 	lsls r1, r1, #2
 	adds r0, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	adds r2, r4, #0
 	subs r2, #0x34
 	movs r0, #0x7f
@@ -3535,7 +3535,7 @@ sub_080A7124: @ 0x080A7124
 	ldr r0, _080A7134 @ =gUnk_02032EC0
 	movs r1, #0xed
 	lsls r1, r1, #2
-	bl sub_0801D630
+	bl _DmaZero
 	pop {pc}
 	.align 2, 0
 _080A7134: .4byte gUnk_02032EC0
@@ -3552,7 +3552,7 @@ sub_080A7138: @ 0x080A7138
 	movs r1, #0xed
 	lsls r1, r1, #2
 	adds r0, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	strb r5, [r4, #2]
 	strb r6, [r4, #3]
 	ldr r0, _080A7160 @ =gUnk_03001000
@@ -3783,18 +3783,18 @@ sub_080A7328: @ 0x080A7328
 	bl sub_0805E89C
 	ldr r0, _080A738C @ =gUnk_02000080
 	movs r1, #0x30
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080A7390 @ =gRoomControls
 	movs r1, #0x38
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080A7394 @ =gUnk_03000420
 	movs r1, #0x80
 	lsls r1, r1, #1
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r4, _080A7398 @ =gUnk_02033280
 	adds r0, r4, #0
 	movs r1, #0xc
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #8
 	strb r0, [r4, #8]
 	movs r0, #1
@@ -4959,7 +4959,7 @@ sub_080A7C7C: @ 0x080A7C7C
 	push {lr}
 	ldr r0, _080A7C88 @ =gUnk_02017660
 	movs r1, #0x40
-	bl sub_0801D630
+	bl _DmaZero
 	pop {pc}
 	.align 2, 0
 _080A7C88: .4byte gUnk_02017660
diff --git a/asm/code_080AD90C.s b/asm/code_080AD90C.s
index 194d7acc..a2259a48 100644
--- a/asm/code_080AD90C.s
+++ b/asm/code_080AD90C.s
@@ -567,7 +567,7 @@ sub_080ADD30: @ 0x080ADD30
 	movs r1, #0x85
 	lsls r1, r1, #2
 	adds r0, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	movs r5, #0
 	adds r4, #4
 	movs r0, #0x10
@@ -718,7 +718,7 @@ _080ADE54: .4byte gUnk_02024494
 _080ADE58:
 	adds r0, r1, #0
 	movs r1, #0xc
-	bl sub_0801D630
+	bl _DmaZero
 _080ADE60:
 	adds r5, #0xc
 	adds r4, #1
@@ -1084,7 +1084,7 @@ sub_080AE104: @ 0x080AE104
 	adds r1, r1, r5
 	lsls r1, r1, #2
 	adds r0, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	strb r5, [r4, #1]
 	strh r6, [r4, #4]
 	adds r0, r4, #0
@@ -1396,7 +1396,7 @@ _080AE350:
 	stm r0!, {r2, r3, r7}
 	adds r0, r6, #0
 	movs r1, #0xc
-	bl sub_0801D630
+	bl _DmaZero
 	adds r6, #0xc
 	adds r5, #0xc
 	movs r0, #0xc
diff --git a/asm/gyorgFemale.s b/asm/gyorgFemale.s
index 20c48072..cae9b128 100644
--- a/asm/gyorgFemale.s
+++ b/asm/gyorgFemale.s
@@ -112,10 +112,10 @@ sub_0804614C: @ 0x0804614C
 	movs r4, #0x80
 	lsls r4, r4, #8
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08046250 @ =gUnk_02002F00
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	adds r0, r6, #0
 	movs r1, #0
 	bl sub_0804660C
@@ -445,10 +445,10 @@ sub_08046498: @ 0x08046498
 	movs r4, #0x80
 	lsls r4, r4, #8
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _080464BC @ =gUnk_02002F00
 	adds r1, r4, #0
-	bl sub_0801D630
+	bl _DmaZero
 	adds r0, r5, #0
 	bl sub_080464C0
 	pop {r4, r5, pc}
@@ -486,7 +486,7 @@ _080464DE:
 	ldr r0, _0804650C @ =gUnk_02019EE0
 	movs r1, #0x80
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r1, _08046514 @ =gUnk_02000070
 	movs r0, #1
 	strb r0, [r1]
diff --git a/asm/initializeLink.s b/asm/initializeLink.s
index ef69d458..b219c8dd 100644
--- a/asm/initializeLink.s
+++ b/asm/initializeLink.s
@@ -8,11 +8,11 @@ InitializeLink: @ 0x080524A8
 	bl sub_080784C8
 	ldr r0, _08052510 @ =gUnk_03000B80
 	movs r1, #0x70
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r6, _08052514 @ =gLinkState
 	adds r0, r6, #0
 	movs r1, #0xb0
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #1
 	rsbs r0, r0, #0
 	adds r1, r6, #0
@@ -22,7 +22,7 @@ InitializeLink: @ 0x080524A8
 	ldr r4, _08052518 @ =gLinkEntity
 	adds r0, r4, #0
 	movs r1, #0x88
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0805251C @ =gRoomControls
 	str r4, [r0, #0x30]
 	ldr r1, _08052520 @ =gUnk_080FCAC8
diff --git a/asm/manager10.s b/asm/manager10.s
index 88b7358d..c618ca61 100644
--- a/asm/manager10.s
+++ b/asm/manager10.s
@@ -338,7 +338,7 @@ _08059800:
 	lsls r5, r5, #4
 	adds r0, r4, #0
 	adds r1, r5, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r1, _08059820 @ =0x0600E800
 	adds r0, r4, #0
 	adds r2, r5, #0
diff --git a/asm/manager1A.s b/asm/manager1A.s
index dedc4bb6..446763f8 100644
--- a/asm/manager1A.s
+++ b/asm/manager1A.s
@@ -28,7 +28,7 @@ sub_0805B048: @ 0x0805B048
 	adds r0, r4, #0
 	adds r0, #0x20
 	movs r1, #0x20
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #1
 	strb r0, [r4, #0xc]
 	ldr r2, _0805B08C @ =gRoomControls
diff --git a/asm/manager22.s b/asm/manager22.s
index 9d18ceba..8cd27864 100644
--- a/asm/manager22.s
+++ b/asm/manager22.s
@@ -297,7 +297,7 @@ _0805BB28:
 	movs r2, #0x80
 	lsls r2, r2, #4
 	movs r0, #0xf
-	bl sub_0801D5EC
+	bl _DmaFill16
 	ldr r0, _0805BB58 @ =gScreen
 	ldr r1, _0805BB5C @ =0x00001E0C
 	strh r1, [r0, #0x2c]
diff --git a/asm/manager2C.s b/asm/manager2C.s
index b588419f..6b3b92a3 100644
--- a/asm/manager2C.s
+++ b/asm/manager2C.s
@@ -44,7 +44,7 @@ _0805D184:
 	ldr r4, _0805D1F8 @ =gUnk_030010AC
 	adds r0, r4, #0
 	movs r1, #0x20
-	bl sub_0801D630
+	bl _DmaZero
 	subs r4, #0xc
 	movs r1, #0
 	movs r0, #1
diff --git a/asm/manager39.s b/asm/manager39.s
index aae17671..26dd0847 100644
--- a/asm/manager39.s
+++ b/asm/manager39.s
@@ -120,7 +120,7 @@ sub_0805E1D8: @ 0x0805E1D8
 	push {lr}
 	ldr r0, _0805E1F0 @ =gUnk_02034DF0
 	movs r1, #0x80
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r1, _0805E1F4 @ =gScreen
 	movs r0, #1
 	strh r0, [r1, #0xe]
@@ -138,7 +138,7 @@ sub_0805E1F8: @ 0x0805E1F8
 	adds r5, r1, #0
 	ldr r0, _0805E234 @ =gUnk_02034DF0
 	movs r1, #0x80
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _0805E238 @ =gUnk_08108E60
 	mov r1, sp
 	movs r2, #9
diff --git a/asm/managerB.s b/asm/managerB.s
index 13d574b2..6e6d4cd0 100644
--- a/asm/managerB.s
+++ b/asm/managerB.s
@@ -216,7 +216,7 @@ sub_08058760: @ 0x08058760
 	adds r0, r4, #0
 	adds r0, #0x20
 	movs r1, #0x20
-	bl sub_0801D630
+	bl _DmaZero
 	adds r0, r4, #0
 	movs r1, #8
 	bl sub_0805EA2C
diff --git a/asm/non_matching/mainLoop.inc b/asm/non_matching/mainLoop.inc
index 651625a1..24e3f299 100644
--- a/asm/non_matching/mainLoop.inc
+++ b/asm/non_matching/mainLoop.inc
@@ -35,7 +35,7 @@
 	ldr r4, _08055F04 @ =gUnk_03001000
 	adds r0, r4, #0
 	movs r1, #0x10
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #0
 	bl sub_08056010
 	adds r6, r4, #0
diff --git a/asm/object3D.s b/asm/object3D.s
index d7a2278d..fd19ab4f 100644
--- a/asm/object3D.s
+++ b/asm/object3D.s
@@ -170,7 +170,7 @@ sub_0808D030: @ 0x0808D030
 	adds r0, r4, #0
 	subs r0, #0x20
 	ldr r1, _0808D05C @ =0x00000B74
-	bl sub_0801D630
+	bl _DmaZero
 	movs r1, #0xa8
 	lsls r1, r1, #2
 	adds r0, r1, #0
diff --git a/asm/sub_0801D630.s b/asm/sub_0801D630.s
index a17d5907..20bb693c 100644
--- a/asm/sub_0801D630.s
+++ b/asm/sub_0801D630.s
@@ -5,8 +5,8 @@
 
 	.text
 	
-	thumb_func_start sub_0801D630
-sub_0801D630: @ 0x0801D630
+	thumb_func_start _DmaZero
+_DmaZero: @ 0x0801D630
 	push {r4, lr}
 	adds r3, r0, #0
 	adds r2, r1, #0
@@ -28,7 +28,7 @@ _0801D64A:
 _0801D654:
 	movs r0, #0
 	adds r1, r3, #0
-	bl sub_0801D5EC
+	bl _DmaFill16
 	b _0801D668
 _0801D65E:
 	strb r4, [r3]
diff --git a/asm/sub_08052418.s b/asm/sub_08052418.s
index 96c92a71..f7bd8bd3 100644
--- a/asm/sub_08052418.s
+++ b/asm/sub_08052418.s
@@ -14,7 +14,7 @@ sub_08052418: @ 0x08052418
 	ldr r0, _08052494 @ =gUnk_02021F30
 	movs r1, #0x80
 	lsls r1, r1, #4
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08052498 @ =gUnk_020227E8
 	movs r1, #0xf
 	str r1, [r0]
diff --git a/asm/sub_08055F70.s b/asm/sub_08055F70.s
index 0bda6107..5cb4e821 100644
--- a/asm/sub_08055F70.s
+++ b/asm/sub_08055F70.s
@@ -23,7 +23,7 @@ sub_08055F70: @ 0x08055F70
 	ldr r2, _08055FD4 @ =0x0003FFD0
 	ldr r0, _08055FD8 @ =gUnk_02000030
 	adds r1, r2, #0
-	bl sub_0801D630
+	bl _DmaZero
 	ldr r0, _08055FDC @ =gUnk_080B2CD8
 	ldr r3, _08055FE0 @ =sub_080B197C
 	subs r2, r0, r3
diff --git a/asm/sub_080AD380.s b/asm/sub_080AD380.s
index db8f0890..56400499 100644
--- a/asm/sub_080AD380.s
+++ b/asm/sub_080AD380.s
@@ -30,7 +30,7 @@ _080AD3A2:
 	ldr r0, _080AD3B8 @ =gUnk_02032EC0
 	movs r1, #0xed
 	lsls r1, r1, #2
-	bl sub_0801D630
+	bl _DmaZero
 	movs r0, #0
 	bl IntroSetTransition
 	b _080AD3EA
diff --git a/asm/wizzrobeIce.s b/asm/wizzrobeIce.s
index 82fc0f89..46e0ab6a 100644
--- a/asm/wizzrobeIce.s
+++ b/asm/wizzrobeIce.s
@@ -383,7 +383,7 @@ sub_080300AC: @ 0x080300AC
 	ldr r4, _080300C0 @ =gUnk_0300110C
 	adds r0, r4, #0
 	movs r1, #0x44
-	bl sub_0801D630
+	bl _DmaZero
 	adds r4, #0x42
 	movs r0, #0xff
 	strh r0, [r4]
@@ -406,7 +406,7 @@ sub_080300C4: @ 0x080300C4
 	strh r1, [r0]
 	subs r0, #0x40
 	movs r1, #0x40
-	bl sub_0801D630
+	bl _DmaZero
 _080300E2:
 	pop {pc}
 	.align 2, 0
diff --git a/include/functions.h b/include/functions.h
index c2cf2e88..e9460e9e 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -89,7 +89,7 @@ extern Entity *sub_0804A98C(Entity *, u32, u32);
 extern u32 sub_080544DC(u8);
 extern void sub_08077E54(Entity*);
 extern void sub_080042BA(Entity*);
-extern void sub_0801D630(void*, u32);
+extern void _DmaZero(void*, u32);
 extern void sub_08077F24(ItemBehavior*, u32);
 extern void sub_08079184();
 extern void sub_08077F50(ItemBehavior *beh, u32 arg1);
diff --git a/include/main.h b/include/main.h
index d9c8719c..c1ef4b5b 100644
--- a/include/main.h
+++ b/include/main.h
@@ -24,7 +24,7 @@ extern void sub_0804FFE4();
 extern s32 sub_0804FF84(s32);
 extern s32 sub_08056418(s32);
 extern void sub_080ADD30(s32);
-extern s32 sub_0801D630(s32, u32, u32);
+extern s32 _DmaZero(s32, u32, u32);
 extern s32 sub_08056010(s32);
 extern s32 sub_08016E78(s32);
 extern s32 ReadKeyInput();
diff --git a/linker.ld b/linker.ld
index 58006a85..d68ed689 100644
--- a/linker.ld
+++ b/linker.ld
@@ -315,9 +315,9 @@ SECTIONS {
 		asm/drawHealth.o(.text);
 		asm/sub_0801C824.o(.text);
 		asm/code_0801C85C.o(.text);
-		src/sub_0801D5EC.o(.text);
+		src/_dmaFill16.o(.text);
 		src/_dmaFill32.o(.text);
-		asm/sub_0801D630.o(.text);
+		src/_dmaZero.o(.text);
 		asm/sub_0801D66C.o(.text);
 		src/input.o(.text);
 		asm/code_0801D714.o(.text);
diff --git a/src/sub_0801D5EC.c b/src/_dmaFill16.c
similarity index 54%
rename from src/sub_0801D5EC.c
rename to src/_dmaFill16.c
index a660e4f0..1befefc7 100644
--- a/src/sub_0801D5EC.c
+++ b/src/_dmaFill16.c
@@ -1,4 +1,4 @@
 #include "global.h"
-void sub_0801D5EC(u32 a1, u32 a2, u32 a3) {
+void _DmaFill16(u32 a1, u32 a2, u32 a3) {
     DmaFill16(3, a1, a2, a3);
 }
diff --git a/src/_dmaZero.c b/src/_dmaZero.c
new file mode 100644
index 00000000..97bbba4c
--- /dev/null
+++ b/src/_dmaZero.c
@@ -0,0 +1,24 @@
+#include "global.h"
+
+void _DmaFill32(u32, void*, u32);
+void _DmaFill16(u32, void*, u32);
+
+void _DmaZero(u8 *src, u32 count)
+{
+    u32 zero = 0;
+
+    switch (((u32)src | count) & 3) {
+        case 0:
+            _DmaFill32(0,src, count);
+            break;
+        case 2:
+            _DmaFill16(0, src, count);
+            break;
+        default:
+            do {
+                *src = zero;
+                src++;
+                count--;
+        } while (count != 0);
+    }
+}
\ No newline at end of file
diff --git a/src/code_08077DF4.c b/src/code_08077DF4.c
index 3897a273..0b849819 100644
--- a/src/code_08077DF4.c
+++ b/src/code_08077DF4.c
@@ -63,7 +63,7 @@ void sub_08077E78(void* arg0, u32 bits)
   not = ~not;
   gLinkState.field_0xa &= not;
   gLinkState.keepFacing &= not;
-  sub_0801D630(arg0, 0x1c);
+  _DmaZero(arg0, 0x1c);
 }
 
 u32 sub_08077EC8(Unk_struct* arg0)
diff --git a/src/introSetTransition.c b/src/introSetTransition.c
index 81ce484c..ff9e54c3 100644
--- a/src/introSetTransition.c
+++ b/src/introSetTransition.c
@@ -13,7 +13,7 @@ typedef struct {
 } TransitionStruct;
 
 extern u32 DoFade(u32, u32);
-extern void sub_0801D630(u32*, u32, u32);
+extern void _DmaZero(u32*, u32, u32);
 extern u32 gUnk_02000080;
 extern TransitionStruct gUnk_03001000;
 extern Menu gUnk_02032EC0;
@@ -23,6 +23,6 @@ u32 IntroSetTransition(u8 transition, u32 param_2, u32 param_3)
 {
     gUnk_02032EC0.transitionType = transition;
     gUnk_03001000.functionIndex = 2;
-    sub_0801D630(&gUnk_02000080, 48, param_3);
+    _DmaZero(&gUnk_02000080, 48, param_3);
     return DoFade(7, 8);
 }
diff --git a/src/mainLoop.c b/src/mainLoop.c
index dcc0ebbf..4e07b882 100644
--- a/src/mainLoop.c
+++ b/src/mainLoop.c
@@ -30,7 +30,7 @@ extern void sub_0804FFE4(void);
 extern void sub_0804FF84(u32);
 extern void sub_08056418(void);
 extern void sub_080ADD30(void);
-extern void sub_0801D630(void*, u32);
+extern void _DmaZero(void*, u32);
 extern void sub_08056010(u32);
 extern void ReadKeyInput();
 extern u32 sub_08055FF4();
@@ -68,7 +68,7 @@ void MainLoop(void) {
     sub_080ADD30();
     gRand = 0x1234567;
     s = &gUnk_03001000;
-    sub_0801D630(s, 16);
+    _DmaZero(s, 16);
     sub_08056010(0);
     while (1) {
         ReadKeyInput();
diff --git a/src/sub_08050008.c b/src/sub_08050008.c
index 7ed85c26..8e370727 100644
--- a/src/sub_08050008.c
+++ b/src/sub_08050008.c
@@ -2,12 +2,12 @@
 
 extern u32 gUnk_020354C0;
 extern s32 gUnk_03000FD0;
-extern void sub_0801D630(u32, u32, u32);
+extern void _DmaZero(u32, u32, u32);
 
 void sub_08050008(u32 param_1, u32 param_2, u32 param_3) {
     s32* unk;
 
-    sub_0801D630((u32)&gUnk_020354C0, 128, param_3);
+    _DmaZero((u32)&gUnk_020354C0, 128, param_3);
 
     unk = &gUnk_03000FD0;
     *(unk + 1) = -1;
diff --git a/src/textbox.c b/src/textbox.c
index b8b82940..f426e392 100644
--- a/src/textbox.c
+++ b/src/textbox.c
@@ -3,7 +3,7 @@
 #include "entity.h"
 #include "textbox.h"
 
-void sub_0801D630();
+void _DmaZero();
 void ShowTextbox();
 void TextboxAtPosition();
 
@@ -62,7 +62,7 @@ void TextboxAtPosition(u32 index, u32 x, u32 y) {
 }
 
 void ShowTextbox(u32 index, u32 param_2, u32* dest) {
-    sub_0801D630(&gTextBox, 32, dest);
+    _DmaZero(&gTextBox, 32, dest);
     gTextBox.textIndex = index;
     gTextBox.textSpeed = 99;
     gTextBox.textWindowWidth = 26;
@@ -75,10 +75,10 @@ void ShowTextbox(u32 index, u32 param_2, u32* dest) {
 
 void sub_08056418(void) {
 
-    sub_0801D630(&gTextBox, 32);
-    sub_0801D630(&gUnk_02022780, 168);
-    sub_0801D630(&gUnk_02036A40, 8);
-    sub_0801D630(&gUnk_02036A38, 8);
-    sub_0801D630(&gUnk_02000040, 4);
+    _DmaZero(&gTextBox, 32);
+    _DmaZero(&gUnk_02022780, 168);
+    _DmaZero(&gUnk_02036A40, 8);
+    _DmaZero(&gUnk_02036A38, 8);
+    _DmaZero(&gUnk_02000040, 4);
     return;
 }