through sub_8101A5C

2 files changed, 225 insertions, 642 deletions

diff --git a/asm/easy_chat_2.s b/asm/easy_chat_2.s
index e21664561..979abfa5e 100644
--- a/asm/easy_chat_2.s
+++ b/asm/easy_chat_2.s
@@ -5,646 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_81015BC
-sub_81015BC: @ 81015BC
-	push {lr}
-	movs r0, 0x2
-	movs r1, 0x11
-	bl FillWindowPixelBuffer
-	movs r0, 0x2
-	movs r1, 0x2
-	bl CopyWindowToVram
-	pop {r0}
-	bx r0
-	thumb_func_end sub_81015BC
-
-	thumb_func_start sub_81015D4
-sub_81015D4: @ 81015D4
-	push {lr}
-	ldr r1, _081015E8 @ =gUnknown_203ACEC
-	cmp r0, 0x6
-	bhi _0810168E
-	lsls r0, 2
-	ldr r1, _081015EC @ =_081015F0
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_081015E8: .4byte gUnknown_203ACEC
-_081015EC: .4byte _081015F0
-	.align 2, 0
-_081015F0:
-	.4byte _0810160C
-	.4byte _08101620
-	.4byte _08101630
-	.4byte _08101644
-	.4byte _08101658
-	.4byte _0810166C
-	.4byte _08101680
-_0810160C:
-	ldr r1, _0810161C @ =gUnknown_203ACEC
-	ldr r2, [r1]
-	movs r0, 0
-	strb r0, [r2, 0x6]
-	ldr r2, [r1]
-	movs r0, 0xA
-	b _0810168C
-	.align 2, 0
-_0810161C: .4byte gUnknown_203ACEC
-_08101620:
-	ldr r1, _0810162C @ =gUnknown_203ACEC
-	ldr r2, [r1]
-	movs r3, 0
-	movs r0, 0x9
-	b _0810164C
-	.align 2, 0
-_0810162C: .4byte gUnknown_203ACEC
-_08101630:
-	ldr r1, _08101640 @ =gUnknown_203ACEC
-	ldr r2, [r1]
-	movs r0, 0xB
-	strb r0, [r2, 0x6]
-	ldr r2, [r1]
-	movs r0, 0x11
-	b _0810168C
-	.align 2, 0
-_08101640: .4byte gUnknown_203ACEC
-_08101644:
-	ldr r1, _08101654 @ =gUnknown_203ACEC
-	ldr r2, [r1]
-	movs r3, 0
-	movs r0, 0x11
-_0810164C:
-	strb r0, [r2, 0x6]
-	ldr r0, [r1]
-	strb r3, [r0, 0x7]
-	b _0810168E
-	.align 2, 0
-_08101654: .4byte gUnknown_203ACEC
-_08101658:
-	ldr r1, _08101668 @ =gUnknown_203ACEC
-	ldr r2, [r1]
-	movs r0, 0x11
-	strb r0, [r2, 0x6]
-	ldr r2, [r1]
-	movs r0, 0xA
-	b _0810168C
-	.align 2, 0
-_08101668: .4byte gUnknown_203ACEC
-_0810166C:
-	ldr r1, _0810167C @ =gUnknown_203ACEC
-	ldr r2, [r1]
-	movs r0, 0x12
-	strb r0, [r2, 0x6]
-	ldr r2, [r1]
-	movs r0, 0x16
-	b _0810168C
-	.align 2, 0
-_0810167C: .4byte gUnknown_203ACEC
-_08101680:
-	ldr r1, _081016A8 @ =gUnknown_203ACEC
-	ldr r2, [r1]
-	movs r0, 0x16
-	strb r0, [r2, 0x6]
-	ldr r2, [r1]
-	movs r0, 0x12
-_0810168C:
-	strb r0, [r2, 0x7]
-_0810168E:
-	ldr r1, [r1]
-	ldrb r0, [r1, 0x6]
-	movs r3, 0x1
-	negs r3, r3
-	adds r2, r3, 0
-	ldrb r3, [r1, 0x7]
-	cmp r0, r3
-	bcs _081016A0
-	movs r2, 0x1
-_081016A0:
-	strb r2, [r1, 0x8]
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081016A8: .4byte gUnknown_203ACEC
-	thumb_func_end sub_81015D4
-
-	thumb_func_start sub_81016AC
-sub_81016AC: @ 81016AC
-	push {r4,lr}
-	ldr r4, _081016D8 @ =gUnknown_203ACEC
-	ldr r1, [r4]
-	ldrb r2, [r1, 0x6]
-	ldrb r0, [r1, 0x7]
-	cmp r2, r0
-	beq _081016DC
-	ldrb r0, [r1, 0x8]
-	adds r0, r2, r0
-	strb r0, [r1, 0x6]
-	ldr r0, [r4]
-	ldrb r0, [r0, 0x6]
-	bl sub_81016E4
-	ldr r0, [r4]
-	ldrb r1, [r0, 0x6]
-	ldrb r0, [r0, 0x7]
-	eors r1, r0
-	negs r0, r1
-	orrs r0, r1
-	lsrs r0, 31
-	b _081016DE
-	.align 2, 0
-_081016D8: .4byte gUnknown_203ACEC
-_081016DC:
-	movs r0, 0
-_081016DE:
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81016AC
-
-	thumb_func_start sub_81016E4
-sub_81016E4: @ 81016E4
-	push {r4,lr}
-	sub sp, 0x8
-	lsls r0, 24
-	lsrs r4, r0, 24
-	movs r0, 0x1E
-	str r0, [sp]
-	movs r0, 0xA
-	str r0, [sp, 0x4]
-	movs r0, 0x1
-	movs r1, 0
-	movs r2, 0
-	movs r3, 0xA
-	bl FillBgTilemapBufferRect_Palette0
-	cmp r4, 0x16
-	bls _08101706
-	b _08101822
-_08101706:
-	lsls r0, r4, 2
-	ldr r1, _08101710 @ =_08101714
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_08101710: .4byte _08101714
-	.align 2, 0
-_08101714:
-	.4byte _08101822
-	.4byte _08101770
-	.4byte _08101778
-	.4byte _08101780
-	.4byte _08101788
-	.4byte _08101790
-	.4byte _08101798
-	.4byte _08101808
-	.4byte _081017FA
-	.4byte _081017EC
-	.4byte _081017DE
-	.4byte _081017A6
-	.4byte _081017AE
-	.4byte _081017B6
-	.4byte _081017BE
-	.4byte _081017C6
-	.4byte _081017CE
-	.4byte _081017D6
-	.4byte _081017DE
-	.4byte _081017EC
-	.4byte _081017FA
-	.4byte _08101808
-	.4byte _08101816
-_08101770:
-	movs r0, 0xB
-	movs r1, 0xE
-	movs r2, 0x3
-	b _0810179E
-_08101778:
-	movs r0, 0x9
-	movs r1, 0xE
-	movs r2, 0x7
-	b _0810179E
-_08101780:
-	movs r0, 0x7
-	movs r1, 0xE
-	movs r2, 0xB
-	b _0810179E
-_08101788:
-	movs r0, 0x5
-	movs r1, 0xE
-	movs r2, 0xF
-	b _0810179E
-_08101790:
-	movs r0, 0x3
-	movs r1, 0xE
-	movs r2, 0x13
-	b _0810179E
-_08101798:
-	movs r0, 0x1
-	movs r1, 0xE
-	movs r2, 0x17
-_0810179E:
-	movs r3, 0x2
-	bl sub_8101830
-	b _08101822
-_081017A6:
-	movs r0, 0x1
-	movs r1, 0xA
-	movs r2, 0x18
-	b _081017E4
-_081017AE:
-	movs r0, 0x1
-	movs r1, 0xA
-	movs r2, 0x19
-	b _081017E4
-_081017B6:
-	movs r0, 0x1
-	movs r1, 0xA
-	movs r2, 0x1A
-	b _081017E4
-_081017BE:
-	movs r0, 0x1
-	movs r1, 0xA
-	movs r2, 0x1B
-	b _081017E4
-_081017C6:
-	movs r0, 0x1
-	movs r1, 0xA
-	movs r2, 0x1C
-	b _081017E4
-_081017CE:
-	movs r0, 0x1
-	movs r1, 0xA
-	movs r2, 0x1D
-	b _081017E4
-_081017D6:
-	movs r0, 0
-	movs r1, 0xA
-	movs r2, 0x1E
-	b _081017E4
-_081017DE:
-	movs r0, 0x1
-	movs r1, 0xA
-	movs r2, 0x17
-_081017E4:
-	movs r3, 0xA
-	bl sub_8101830
-	b _08101822
-_081017EC:
-	movs r0, 0x1
-	movs r1, 0xB
-	movs r2, 0x17
-	movs r3, 0x8
-	bl sub_8101830
-	b _08101822
-_081017FA:
-	movs r0, 0x1
-	movs r1, 0xC
-	movs r2, 0x17
-	movs r3, 0x6
-	bl sub_8101830
-	b _08101822
-_08101808:
-	movs r0, 0x1
-	movs r1, 0xD
-	movs r2, 0x17
-	movs r3, 0x4
-	bl sub_8101830
-	b _08101822
-_08101816:
-	movs r0, 0x1
-	movs r1, 0xE
-	movs r2, 0x17
-	movs r3, 0x2
-	bl sub_8101830
-_08101822:
-	movs r0, 0x1
-	bl CopyBgTilemapBufferToVram
-	add sp, 0x8
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_81016E4
-
-	thumb_func_start sub_8101830
-sub_8101830: @ 8101830
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0x8
-	mov r12, r0
-	adds r7, r1, 0
-	mov r9, r2
-	mov r10, r3
-	ldr r0, _08101968 @ =gUnknown_203ACEC
-	ldr r0, [r0]
-	movs r1, 0xC0
-	lsls r1, 2
-	adds r6, r0, r1
-	mov r0, r12
-	add r0, r9
-	subs r5, r0, 0x1
-	adds r0, r7, r3
-	subs r0, 0x1
-	mov r8, r0
-	mov r2, r12
-	adds r3, r7, 0
-	lsls r0, r3, 5
-	adds r0, r2
-	lsls r0, 1
-	adds r0, r6
-	ldr r4, _0810196C @ =0x00004001
-	adds r1, r4, 0
-	strh r1, [r0]
-	adds r2, 0x1
-	cmp r2, r5
-	bge _0810188C
-	ldr r0, _08101970 @ =0x00004002
-	adds r4, r0, 0
-	lsls r1, r2, 1
-	lsls r0, r3, 6
-	adds r0, r6
-	adds r1, r0
-	subs r2, r5, r2
-_08101880:
-	strh r4, [r1]
-	adds r1, 0x2
-	subs r2, 0x1
-	cmp r2, 0
-	bne _08101880
-	adds r2, r5, 0
-_0810188C:
-	lsls r0, r3, 5
-	adds r0, r2
-	lsls r0, 1
-	adds r0, r6
-	ldr r2, _08101974 @ =0x00004003
-	adds r1, r2, 0
-	strh r1, [r0]
-	adds r3, 0x1
-	mov r4, r12
-	adds r4, 0x1
-	adds r0, r7, 0x1
-	str r0, [sp, 0x4]
-	mov r1, r9
-	subs r1, 0x2
-	str r1, [sp]
-	movs r2, 0x2
-	negs r2, r2
-	add r10, r2
-	cmp r3, r8
-	bge _081018FC
-	lsls r7, r4, 1
-	mov r9, r7
-_081018B8:
-	lsls r0, r3, 5
-	add r0, r12
-	lsls r0, 1
-	adds r0, r6
-	ldr r2, _08101978 @ =0x00004005
-	adds r1, r2, 0
-	strh r1, [r0]
-	adds r2, r4, 0
-	adds r7, r3, 0x1
-	cmp r4, r5
-	bge _081018E8
-	movs r0, 0x80
-	lsls r0, 7
-	adds r1, r0, 0
-	lsls r0, r3, 6
-	adds r0, r6
-	add r0, r9
-	subs r2, r5, r4
-_081018DC:
-	strh r1, [r0]
-	adds r0, 0x2
-	subs r2, 0x1
-	cmp r2, 0
-	bne _081018DC
-	adds r2, r5, 0
-_081018E8:
-	lsls r0, r3, 5
-	adds r0, r2
-	lsls r0, 1
-	adds r0, r6
-	ldr r2, _0810197C @ =0x00004007
-	adds r1, r2, 0
-	strh r1, [r0]
-	adds r3, r7, 0
-	cmp r3, r8
-	blt _081018B8
-_081018FC:
-	lsls r0, r3, 5
-	mov r7, r12
-	adds r1, r0, r7
-	lsls r1, 1
-	adds r1, r6
-	ldr r7, _08101980 @ =0x00004009
-	adds r2, r7, 0
-	strh r2, [r1]
-	adds r2, r4, 0
-	mov r12, r0
-	cmp r4, r5
-	bge _0810192E
-	ldr r0, _08101984 @ =0x0000400a
-	adds r7, r0, 0
-	lsls r1, r4, 1
-	lsls r0, r3, 6
-	adds r0, r6
-	adds r0, r1, r0
-	subs r2, r5, r4
-_08101922:
-	strh r7, [r0]
-	adds r0, 0x2
-	subs r2, 0x1
-	cmp r2, 0
-	bne _08101922
-	adds r2, r5, 0
-_0810192E:
-	mov r1, r12
-	adds r0, r1, r2
-	lsls r0, 1
-	adds r0, r6
-	ldr r2, _08101988 @ =0x0000400b
-	adds r1, r2, 0
-	strh r1, [r0]
-	lsls r0, r4, 27
-	lsrs r0, 24
-	ldr r3, [sp, 0x4]
-	lsls r1, r3, 27
-	lsrs r1, 24
-	ldr r4, [sp]
-	lsls r2, r4, 27
-	lsrs r2, 24
-	mov r7, r10
-	lsls r3, r7, 27
-	lsrs r3, 24
-	bl sub_8101A5C
-	add sp, 0x8
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08101968: .4byte gUnknown_203ACEC
-_0810196C: .4byte 0x00004001
-_08101970: .4byte 0x00004002
-_08101974: .4byte 0x00004003
-_08101978: .4byte 0x00004005
-_0810197C: .4byte 0x00004007
-_08101980: .4byte 0x00004009
-_08101984: .4byte 0x0000400a
-_08101988: .4byte 0x0000400b
-	thumb_func_end sub_8101830
-
-	thumb_func_start sub_810198C
-sub_810198C: @ 810198C
-	push {lr}
-	movs r1, 0x80
-	lsls r1, 4
-	movs r0, 0x2
-	movs r2, 0
-	bl ChangeBgY
-	ldr r0, _081019AC @ =gUnknown_203ACEC
-	ldr r0, [r0]
-	movs r1, 0xB3
-	lsls r1, 2
-	adds r0, r1
-	movs r1, 0
-	strh r1, [r0]
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081019AC: .4byte gUnknown_203ACEC
-	thumb_func_end sub_810198C
-
-	thumb_func_start sub_81019B0
-sub_81019B0: @ 81019B0
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	lsls r4, 16
-	lsrs r4, 16
-	lsls r1, 24
-	lsrs r5, r1, 24
-	movs r0, 0x2
-	bl GetBgY
-	adds r2, r0, 0
-	ldr r0, _081019FC @ =gUnknown_203ACEC
-	ldr r3, [r0]
-	movs r0, 0xB3
-	lsls r0, 2
-	adds r1, r3, r0
-	ldrh r0, [r1]
-	adds r0, r4
-	strh r0, [r1]
-	lsls r4, 20
-	asrs r4, 16
-	lsls r0, r4, 8
-	adds r2, r0
-	cmp r5, 0
-	beq _08101A00
-	movs r1, 0xB4
-	lsls r1, 2
-	adds r0, r3, r1
-	str r2, [r0]
-	movs r0, 0xB5
-	lsls r0, 2
-	adds r1, r3, r0
-	lsls r0, r5, 8
-	str r0, [r1]
-	cmp r4, 0
-	bge _08101A0A
-	negs r0, r0
-	str r0, [r1]
-	b _08101A0A
-	.align 2, 0
-_081019FC: .4byte gUnknown_203ACEC
-_08101A00:
-	movs r0, 0x2
-	adds r1, r2, 0
-	movs r2, 0
-	bl ChangeBgY
-_08101A0A:
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_81019B0
-
-	thumb_func_start sub_8101A10
-sub_8101A10: @ 8101A10
-	push {lr}
-	movs r0, 0x2
-	bl GetBgY
-	ldr r1, _08101A3C @ =gUnknown_203ACEC
-	ldr r2, [r1]
-	movs r3, 0xB4
-	lsls r3, 2
-	adds r1, r2, r3
-	ldr r1, [r1]
-	cmp r0, r1
-	beq _08101A40
-	movs r1, 0xB5
-	lsls r1, 2
-	adds r0, r2, r1
-	ldr r1, [r0]
-	movs r0, 0x2
-	movs r2, 0x1
-	bl ChangeBgY
-	movs r0, 0x1
-	b _08101A42
-	.align 2, 0
-_08101A3C: .4byte gUnknown_203ACEC
-_08101A40:
-	movs r0, 0
-_08101A42:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_8101A10
-
-	thumb_func_start sub_8101A48
-sub_8101A48: @ 8101A48
-	ldr r0, _08101A58 @ =gUnknown_203ACEC
-	ldr r0, [r0]
-	movs r1, 0xB3
-	lsls r1, 2
-	adds r0, r1
-	ldrh r0, [r0]
-	bx lr
-	.align 2, 0
-_08101A58: .4byte gUnknown_203ACEC
-	thumb_func_end sub_8101A48
-
-	thumb_func_start sub_8101A5C
-sub_8101A5C: @ 8101A5C
-	push {r4,r5,lr}
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, 24
-	lsrs r1, 24
-	lsls r2, 24
-	lsrs r2, 24
-	lsls r3, 24
-	lsrs r3, 24
-	lsls r4, r0, 8
-	adds r0, r2
-	orrs r4, r0
-	lsls r5, r1, 8
-	adds r1, r3
-	orrs r5, r1
-	movs r0, 0x40
-	adds r1, r4, 0
-	bl SetGpuReg
-	movs r0, 0x44
-	adds r1, r5, 0
-	bl SetGpuReg
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_8101A5C
-
 	thumb_func_start sub_8101A90
 sub_8101A90: @ 8101A90
 	push {r4,r5,lr}
diff --git a/src/easy_chat_3.c b/src/easy_chat_3.c
index 84a53aa1a..75fdb20a3 100644
--- a/src/easy_chat_3.c
+++ b/src/easy_chat_3.c
@@ -17,7 +17,7 @@ struct Unk203A11C
     s8 unk8;
     u8 unk9;
     u8 unkA[0xC1];
-    u8 unkCC[0x202];
+    u8 unkCC[0x200];
     u16 unk2CE;
     int unk2D0;
     int unk2D4;
@@ -91,8 +91,10 @@ void sub_8101478(void);
 void sub_81014AC(u8 a0, u8 a1);
 void sub_8101558(u8 a0, u8 a1);
 void sub_81015BC(void);
-void sub_81015D4(u8 a0);
+void sub_81015D4(int a0);
 bool8 sub_81016AC(void);
+void sub_81016E4(u8 a0);
+void sub_8101830(int left, int top, int width, int height);
 void sub_810198C(void);
 void sub_81019B0(s16 a0, u8 a1);
 bool8 sub_8101A10(void);
@@ -1417,3 +1419,224 @@ void sub_8101558(u8 arg0, u8 arg1)
     if (var1)
         FillWindowPixelRect(2, PIXEL_FILL(1), 0, 0, 224, var1);
 }
+
+void sub_81015BC(void)
+{
+    FillWindowPixelBuffer(2, PIXEL_FILL(1));
+    CopyWindowToVram(2, 2);
+}
+
+void sub_81015D4(int arg0)
+{
+    switch (arg0)
+    {
+    case 0:
+        gUnknown_203ACEC->unk6 = 0;
+        gUnknown_203ACEC->unk7 = 10;
+        break;
+    case 1:
+        gUnknown_203ACEC->unk6 = 9;
+        gUnknown_203ACEC->unk7 = 0;
+        break;
+    case 2:
+        gUnknown_203ACEC->unk6 = 11;
+        gUnknown_203ACEC->unk7 = 17;
+        break;
+    case 3:
+        gUnknown_203ACEC->unk6 = 17;
+        gUnknown_203ACEC->unk7 = 0;
+        break;
+    case 4:
+        gUnknown_203ACEC->unk6 = 17;
+        gUnknown_203ACEC->unk7 = 10;
+        break;
+    case 5:
+        gUnknown_203ACEC->unk6 = 18;
+        gUnknown_203ACEC->unk7 = 22;
+        break;
+    case 6:
+        gUnknown_203ACEC->unk6 = 22;
+        gUnknown_203ACEC->unk7 = 18;
+        break;
+    }
+
+    gUnknown_203ACEC->unk8 = gUnknown_203ACEC->unk6 < gUnknown_203ACEC->unk7 ? 1 : -1;
+}
+
+bool8 sub_81016AC(void)
+{
+    u8 var0, var1;
+    if (gUnknown_203ACEC->unk6 == gUnknown_203ACEC->unk7)
+        return FALSE;
+
+    gUnknown_203ACEC->unk6 += gUnknown_203ACEC->unk8;
+    sub_81016E4(gUnknown_203ACEC->unk6);
+    var0 = gUnknown_203ACEC->unk6;
+    var1 = gUnknown_203ACEC->unk7;
+    return (var0 ^ var1) > 0;
+}
+
+void sub_81016E4(u8 arg0)
+{
+    FillBgTilemapBufferRect_Palette0(1, 0, 0, 10, 30, 10);
+    switch (arg0)
+    {
+    case 0:
+        break;
+    case 1:
+        sub_8101830(11, 14, 3, 2);
+        break;
+    case 2:
+        sub_8101830(9, 14, 7, 2);
+        break;
+    case 3:
+        sub_8101830(7, 14, 11, 2);
+        break;
+    case 4:
+        sub_8101830(5, 14, 15, 2);
+        break;
+    case 5:
+        sub_8101830(3, 14, 19, 2);
+        break;
+    case 6:
+        sub_8101830(1, 14, 23, 2);
+        break;
+    case 11:
+        sub_8101830(1, 10, 24, 10);
+        break;
+    case 12:
+        sub_8101830(1, 10, 25, 10);
+        break;
+    case 13:
+        sub_8101830(1, 10, 26, 10);
+        break;
+    case 14:
+        sub_8101830(1, 10, 27, 10);
+        break;
+    case 15:
+        sub_8101830(1, 10, 28, 10);
+        break;
+    case 16:
+        sub_8101830(1, 10, 29, 10);
+        break;
+    case 17:
+        sub_8101830(0, 10, 30, 10);
+        break;
+    case 10:
+    case 18:
+        sub_8101830(1, 10, 23, 10);
+        break;
+    case 9:
+    case 19:
+        sub_8101830(1, 11, 23, 8);
+        break;
+    case 8:
+    case 20:
+        sub_8101830(1, 12, 23, 6);
+        break;
+    case 7:
+    case 21:
+        sub_8101830(1, 13, 23, 4);
+        break;
+    case 22:
+        sub_8101830(1, 14, 23, 2);
+        break;
+    }
+
+    CopyBgTilemapBufferToVram(1);
+}
+
+void sub_8101830(int left, int top, int width, int height)
+{
+    u16 *tilemap;
+    int right;
+    int bottom;
+    int x, y;
+
+    tilemap = gUnknown_203ACEC->unk300;
+    right = left + width - 1;
+    bottom = top + height - 1;
+    x = left;
+    y = top;
+    tilemap[y * 32 + x] = 0x4001;
+    x++;
+    for (; x < right; x++)
+        tilemap[y * 32 + x] = 0x4002;
+
+    tilemap[y * 32 + x] = 0x4003;
+    y++;
+    for (; y < bottom; y++)
+    {
+        tilemap[y * 32 + left] = 0x4005;
+        x = left + 1;
+        for (; x < right; x++)
+            tilemap[y * 32 + x] = 0x4000;
+
+        tilemap[y * 32 + x] = 0x4007;
+    }
+
+    tilemap[y * 32 + left] = 0x4009;
+    x = left + 1;
+    for (; x < right; x++)
+        tilemap[y * 32 + x] = 0x400A;
+
+    tilemap[y * 32 + x] = 0x400B;
+    sub_8101A5C((left + 1) * 8, (top + 1) * 8, (width - 2) * 8, (height - 2) * 8);
+}
+
+void sub_810198C(void)
+{
+    ChangeBgY(2, 0x800, 0);
+    gUnknown_203ACEC->unk2CE = 0;
+}
+
+void sub_81019B0(s16 arg0, u8 arg1)
+{
+    int bgY;
+    s16 var0;
+
+    bgY = GetBgY(2);
+    gUnknown_203ACEC->unk2CE += arg0;
+    var0 = arg0 * 16;
+    bgY += var0 << 8;
+    if (arg1)
+    {
+        gUnknown_203ACEC->unk2D0 = bgY;
+        gUnknown_203ACEC->unk2D4 = arg1 * 256;
+        if (var0 < 0)
+            gUnknown_203ACEC->unk2D4 = -gUnknown_203ACEC->unk2D4;
+    }
+    else
+    {
+        ChangeBgY(2, bgY, 0);
+    }
+}
+
+bool8 sub_8101A10(void)
+{
+    int bgY;
+
+    bgY = GetBgY(2);
+    if (bgY == gUnknown_203ACEC->unk2D0)
+    {
+        return FALSE;
+    }
+    else
+    {
+        ChangeBgY(2, gUnknown_203ACEC->unk2D4, 1);
+        return TRUE;
+    }
+}
+
+int sub_8101A48(void)
+{
+    return gUnknown_203ACEC->unk2CE;
+}
+
+void sub_8101A5C(u8 left, u8 top, u8 width, u8 height)
+{
+    u16 horizontalDimensions = WIN_RANGE(left, left + width);
+    u16 verticalDimensions = WIN_RANGE(top, top + height);
+    SetGpuReg(REG_OFFSET_WIN0H, horizontalDimensions);
+    SetGpuReg(REG_OFFSET_WIN0V, verticalDimensions);
+}