diff --git a/asm/text_window.s b/asm/text_window.s
deleted file mode 100644
index 737c0018d..000000000
--- a/asm/text_window.s
+++ /dev/null
@@ -1,686 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start sub_8098758
-sub_8098758: @ 8098758
-	push {lr}
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x13
-	bhi _08098770
-	lsls r0, 3
-	ldr r1, =gUnknown_0851021C
-	adds r0, r1
-	b _08098772
-	.pool
-_08098770:
-	ldr r0, =gUnknown_0851021C
-_08098772:
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end sub_8098758
-
-	thumb_func_start copy_textbox_border_tile_patterns_to_vram
-@ void copy_textbox_border_tile_patterns_to_vram(u8 rbox_id, u16 tile_pattern_dest_offset, u8 pal_dest_offset)
-copy_textbox_border_tile_patterns_to_vram: @ 809877C
-	push {r4,r5,lr}
-	adds r4, r1, 0
-	adds r5, r2, 0
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r4, 16
-	lsrs r4, 16
-	lsls r5, 24
-	lsrs r5, 24
-	movs r1, 0
-	bl GetWindowAttribute
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r1, =gUnknown_08DDD748
-	movs r2, 0xE0
-	lsls r2, 1
-	adds r3, r4, 0
-	bl LoadBgTiles
-	bl sub_8098C64
-	adds r1, r5, 0
-	movs r2, 0x20
-	bl LoadPalette
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end copy_textbox_border_tile_patterns_to_vram
-
-	thumb_func_start box_border_load_tiles_and_pal
-box_border_load_tiles_and_pal: @ 80987BC
-	push {lr}
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, 16
-	lsrs r1, 16
-	lsls r2, 24
-	lsrs r2, 24
-	bl sub_809882C
-	pop {r0}
-	bx r0
-	thumb_func_end box_border_load_tiles_and_pal
-
-	thumb_func_start sub_80987D4
-sub_80987D4: @ 80987D4
-	push {r4-r6,lr}
-	mov r6, r8
-	push {r6}
-	adds r4, r1, 0
-	adds r6, r2, 0
-	mov r8, r3
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r4, 24
-	lsrs r4, 24
-	lsls r6, 16
-	lsrs r6, 16
-	mov r1, r8
-	lsls r1, 24
-	lsrs r1, 24
-	mov r8, r1
-	movs r1, 0
-	bl GetWindowAttribute
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r5, =gUnknown_0851021C
-	lsls r4, 3
-	adds r1, r4, r5
-	ldr r1, [r1]
-	movs r2, 0x90
-	lsls r2, 1
-	adds r3, r6, 0
-	bl LoadBgTiles
-	adds r5, 0x4
-	adds r4, r5
-	ldr r0, [r4]
-	mov r1, r8
-	movs r2, 0x20
-	bl LoadPalette
-	pop {r3}
-	mov r8, r3
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_80987D4
-
-	thumb_func_start sub_809882C
-sub_809882C: @ 809882C
-	push {r4,lr}
-	adds r4, r1, 0
-	adds r3, r2, 0
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r4, 16
-	lsrs r4, 16
-	lsls r3, 24
-	lsrs r3, 24
-	ldr r1, =gSaveBlock2Ptr
-	ldr r1, [r1]
-	ldrb r1, [r1, 0x14]
-	lsrs r1, 3
-	adds r2, r4, 0
-	bl sub_80987D4
-	pop {r4}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_809882C
-
-	thumb_func_start sub_8098858
-sub_8098858: @ 8098858
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0x20
-	adds r4, r0, 0
-	adds r5, r1, 0
-	lsls r4, 24
-	lsrs r4, 24
-	lsls r5, 16
-	lsrs r5, 16
-	lsls r2, 24
-	lsrs r2, 24
-	str r2, [sp, 0xC]
-	adds r0, r4, 0
-	movs r1, 0
-	bl GetWindowAttribute
-	lsls r0, 24
-	lsrs r7, r0, 24
-	adds r0, r4, 0
-	movs r1, 0x1
-	bl GetWindowAttribute
-	mov r8, r0
-	lsls r0, 16
-	lsrs r0, 16
-	mov r8, r0
-	adds r0, r4, 0
-	movs r1, 0x2
-	bl GetWindowAttribute
-	adds r6, r0, 0
-	lsls r6, 16
-	lsrs r6, 16
-	adds r0, r4, 0
-	movs r1, 0x3
-	bl GetWindowAttribute
-	mov r9, r0
-	mov r2, r9
-	lsls r2, 16
-	lsrs r2, 16
-	mov r9, r2
-	adds r0, r4, 0
-	movs r1, 0x4
-	bl GetWindowAttribute
-	lsls r0, 16
-	lsrs r0, 16
-	str r0, [sp, 0x10]
-	mov r0, r8
-	subs r0, 0x1
-	lsls r2, r0, 24
-	lsrs r2, 24
-	str r2, [sp, 0x14]
-	subs r4, r6, 0x1
-	lsls r4, 24
-	lsrs r4, 24
-	movs r0, 0x1
-	mov r10, r0
-	str r0, [sp]
-	str r0, [sp, 0x4]
-	ldr r2, [sp, 0xC]
-	str r2, [sp, 0x8]
-	adds r0, r7, 0
-	adds r1, r5, 0
-	ldr r2, [sp, 0x14]
-	adds r3, r4, 0
-	bl FillBgTilemapBufferRect
-	adds r1, r5, 0x1
-	lsls r1, 16
-	lsrs r1, 16
-	mov r0, r8
-	lsls r2, r0, 24
-	lsrs r2, 24
-	str r2, [sp, 0x18]
-	mov r2, r9
-	lsls r0, r2, 24
-	lsrs r0, 24
-	str r0, [sp, 0x1C]
-	str r0, [sp]
-	mov r0, r10
-	str r0, [sp, 0x4]
-	ldr r2, [sp, 0xC]
-	str r2, [sp, 0x8]
-	adds r0, r7, 0
-	ldr r2, [sp, 0x18]
-	adds r3, r4, 0
-	bl FillBgTilemapBufferRect
-	adds r1, r5, 0x2
-	lsls r1, 16
-	lsrs r1, 16
-	add r8, r9
-	mov r0, r8
-	lsls r0, 24
-	lsrs r0, 24
-	mov r8, r0
-	mov r2, r10
-	str r2, [sp]
-	str r2, [sp, 0x4]
-	ldr r0, [sp, 0xC]
-	str r0, [sp, 0x8]
-	adds r0, r7, 0
-	mov r2, r8
-	adds r3, r4, 0
-	bl FillBgTilemapBufferRect
-	adds r1, r5, 0x3
-	lsls r1, 16
-	lsrs r1, 16
-	lsls r2, r6, 24
-	lsrs r2, 24
-	mov r9, r2
-	mov r0, r10
-	str r0, [sp]
-	ldr r2, [sp, 0x10]
-	lsls r4, r2, 24
-	lsrs r4, 24
-	str r4, [sp, 0x4]
-	ldr r0, [sp, 0xC]
-	str r0, [sp, 0x8]
-	adds r0, r7, 0
-	ldr r2, [sp, 0x14]
-	mov r3, r9
-	bl FillBgTilemapBufferRect
-	adds r1, r5, 0x5
-	lsls r1, 16
-	lsrs r1, 16
-	mov r2, r10
-	str r2, [sp]
-	str r4, [sp, 0x4]
-	ldr r0, [sp, 0xC]
-	str r0, [sp, 0x8]
-	adds r0, r7, 0
-	mov r2, r8
-	mov r3, r9
-	bl FillBgTilemapBufferRect
-	adds r1, r5, 0x6
-	lsls r1, 16
-	lsrs r1, 16
-	ldr r2, [sp, 0x10]
-	adds r6, r2
-	lsls r6, 24
-	lsrs r6, 24
-	mov r0, r10
-	str r0, [sp]
-	str r0, [sp, 0x4]
-	ldr r2, [sp, 0xC]
-	str r2, [sp, 0x8]
-	adds r0, r7, 0
-	ldr r2, [sp, 0x14]
-	adds r3, r6, 0
-	bl FillBgTilemapBufferRect
-	adds r1, r5, 0x7
-	lsls r1, 16
-	lsrs r1, 16
-	ldr r0, [sp, 0x1C]
-	str r0, [sp]
-	mov r2, r10
-	str r2, [sp, 0x4]
-	ldr r0, [sp, 0xC]
-	str r0, [sp, 0x8]
-	adds r0, r7, 0
-	ldr r2, [sp, 0x18]
-	adds r3, r6, 0
-	bl FillBgTilemapBufferRect
-	adds r5, 0x8
-	lsls r5, 16
-	lsrs r5, 16
-	mov r2, r10
-	str r2, [sp]
-	str r2, [sp, 0x4]
-	ldr r0, [sp, 0xC]
-	str r0, [sp, 0x8]
-	adds r0, r7, 0
-	adds r1, r5, 0
-	mov r2, r8
-	adds r3, r6, 0
-	bl FillBgTilemapBufferRect
-	add sp, 0x20
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_8098858
-
-	thumb_func_start sub_80989E0
-sub_80989E0: @ 80989E0
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0x1C
-	adds r4, r0, 0
-	mov r9, r1
-	lsls r4, 24
-	lsrs r4, 24
-	mov r0, r9
-	lsls r0, 16
-	lsrs r0, 16
-	mov r9, r0
-	lsls r2, 24
-	lsrs r2, 24
-	mov r10, r2
-	adds r0, r4, 0
-	movs r1, 0
-	bl GetWindowAttribute
-	lsls r0, 24
-	lsrs r7, r0, 24
-	adds r0, r4, 0
-	movs r1, 0x1
-	bl GetWindowAttribute
-	mov r8, r0
-	lsls r0, 16
-	lsrs r0, 16
-	mov r8, r0
-	adds r0, r4, 0
-	movs r1, 0x2
-	bl GetWindowAttribute
-	adds r6, r0, 0
-	lsls r6, 16
-	lsrs r6, 16
-	adds r0, r4, 0
-	movs r1, 0x3
-	bl GetWindowAttribute
-	adds r5, r0, 0
-	lsls r5, 16
-	lsrs r5, 16
-	adds r0, r4, 0
-	movs r1, 0x4
-	bl GetWindowAttribute
-	lsls r0, 16
-	lsrs r0, 16
-	str r0, [sp, 0xC]
-	mov r0, r8
-	lsls r2, r0, 24
-	lsrs r2, 24
-	str r2, [sp, 0x10]
-	lsls r4, r6, 24
-	lsrs r4, 24
-	movs r0, 0x1
-	str r0, [sp]
-	str r0, [sp, 0x4]
-	mov r0, r10
-	str r0, [sp, 0x8]
-	adds r0, r7, 0
-	mov r1, r9
-	adds r3, r4, 0
-	bl FillBgTilemapBufferRect
-	mov r1, r9
-	adds r1, 0x1
-	lsls r1, 16
-	lsrs r1, 16
-	mov r0, r8
-	adds r0, 0x1
-	lsls r2, r0, 24
-	lsrs r2, 24
-	str r2, [sp, 0x14]
-	subs r0, r5, 0x2
-	lsls r0, 24
-	lsrs r0, 24
-	str r0, [sp, 0x18]
-	str r0, [sp]
-	movs r0, 0x1
-	str r0, [sp, 0x4]
-	mov r0, r10
-	str r0, [sp, 0x8]
-	adds r0, r7, 0
-	adds r3, r4, 0
-	bl FillBgTilemapBufferRect
-	mov r1, r9
-	adds r1, 0x2
-	lsls r1, 16
-	lsrs r1, 16
-	add r8, r5
-	movs r0, 0x1
-	negs r0, r0
-	add r8, r0
-	mov r0, r8
-	lsls r0, 24
-	lsrs r0, 24
-	mov r8, r0
-	movs r0, 0x1
-	str r0, [sp]
-	str r0, [sp, 0x4]
-	mov r0, r10
-	str r0, [sp, 0x8]
-	adds r0, r7, 0
-	mov r2, r8
-	adds r3, r4, 0
-	bl FillBgTilemapBufferRect
-	mov r1, r9
-	adds r1, 0x3
-	lsls r1, 16
-	lsrs r1, 16
-	adds r5, r6, 0x1
-	lsls r5, 24
-	lsrs r5, 24
-	movs r0, 0x1
-	str r0, [sp]
-	ldr r4, [sp, 0xC]
-	subs r4, 0x2
-	lsls r4, 24
-	lsrs r4, 24
-	str r4, [sp, 0x4]
-	mov r0, r10
-	str r0, [sp, 0x8]
-	adds r0, r7, 0
-	ldr r2, [sp, 0x10]
-	adds r3, r5, 0
-	bl FillBgTilemapBufferRect
-	mov r1, r9
-	adds r1, 0x5
-	lsls r1, 16
-	lsrs r1, 16
-	movs r0, 0x1
-	str r0, [sp]
-	str r4, [sp, 0x4]
-	mov r0, r10
-	str r0, [sp, 0x8]
-	adds r0, r7, 0
-	mov r2, r8
-	adds r3, r5, 0
-	bl FillBgTilemapBufferRect
-	mov r1, r9
-	adds r1, 0x6
-	lsls r1, 16
-	lsrs r1, 16
-	ldr r0, [sp, 0xC]
-	adds r6, r0
-	subs r6, 0x1
-	lsls r6, 24
-	lsrs r6, 24
-	movs r0, 0x1
-	str r0, [sp]
-	str r0, [sp, 0x4]
-	mov r0, r10
-	str r0, [sp, 0x8]
-	adds r0, r7, 0
-	ldr r2, [sp, 0x10]
-	adds r3, r6, 0
-	bl FillBgTilemapBufferRect
-	mov r1, r9
-	adds r1, 0x7
-	lsls r1, 16
-	lsrs r1, 16
-	ldr r0, [sp, 0x18]
-	str r0, [sp]
-	movs r0, 0x1
-	str r0, [sp, 0x4]
-	mov r0, r10
-	str r0, [sp, 0x8]
-	adds r0, r7, 0
-	ldr r2, [sp, 0x14]
-	adds r3, r6, 0
-	bl FillBgTilemapBufferRect
-	movs r0, 0x8
-	add r9, r0
-	mov r0, r9
-	lsls r0, 16
-	lsrs r0, 16
-	mov r9, r0
-	movs r0, 0x1
-	str r0, [sp]
-	str r0, [sp, 0x4]
-	mov r0, r10
-	str r0, [sp, 0x8]
-	adds r0, r7, 0
-	mov r1, r9
-	mov r2, r8
-	adds r3, r6, 0
-	bl FillBgTilemapBufferRect
-	add sp, 0x1C
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80989E0
-
-	thumb_func_start rbox_fill_rectangle
-rbox_fill_rectangle: @ 8098B7C
-	push {r4-r6,lr}
-	mov r6, r9
-	mov r5, r8
-	push {r5,r6}
-	sub sp, 0xC
-	adds r6, r0, 0
-	lsls r6, 24
-	lsrs r6, 24
-	adds r0, r6, 0
-	movs r1, 0
-	bl GetWindowAttribute
-	mov r9, r0
-	lsls r0, 24
-	lsrs r0, 24
-	mov r9, r0
-	adds r0, r6, 0
-	movs r1, 0x1
-	bl GetWindowAttribute
-	mov r8, r0
-	mov r1, r8
-	lsls r1, 16
-	lsrs r1, 16
-	mov r8, r1
-	adds r0, r6, 0
-	movs r1, 0x2
-	bl GetWindowAttribute
-	adds r5, r0, 0
-	lsls r5, 16
-	lsrs r5, 16
-	adds r0, r6, 0
-	movs r1, 0x3
-	bl GetWindowAttribute
-	adds r4, r0, 0
-	lsls r4, 16
-	lsrs r4, 16
-	adds r0, r6, 0
-	movs r1, 0x4
-	bl GetWindowAttribute
-	movs r1, 0x1
-	negs r1, r1
-	add r8, r1
-	mov r1, r8
-	lsls r1, 24
-	lsrs r1, 24
-	mov r8, r1
-	subs r5, 0x1
-	lsls r5, 24
-	lsrs r5, 24
-	adds r4, 0x2
-	lsls r4, 24
-	lsrs r4, 24
-	str r4, [sp]
-	lsls r0, 24
-	movs r1, 0x80
-	lsls r1, 18
-	adds r0, r1
-	lsrs r0, 24
-	str r0, [sp, 0x4]
-	movs r0, 0x11
-	str r0, [sp, 0x8]
-	mov r0, r9
-	movs r1, 0
-	mov r2, r8
-	adds r3, r5, 0
-	bl FillBgTilemapBufferRect
-	add sp, 0xC
-	pop {r3,r4}
-	mov r8, r3
-	mov r9, r4
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	thumb_func_end rbox_fill_rectangle
-
-	thumb_func_start stdpal_get
-stdpal_get: @ 8098C18
-	push {lr}
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x4
-	bhi _08098C54
-	lsls r0, 2
-	ldr r1, =_08098C30
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.pool
-	.align 2, 0
-_08098C30:
-	.4byte _08098C44
-	.4byte _08098C48
-	.4byte _08098C4C
-	.4byte _08098C50
-	.4byte _08098C54
-_08098C44:
-	movs r0, 0
-	b _08098C56
-_08098C48:
-	movs r0, 0x10
-	b _08098C56
-_08098C4C:
-	movs r0, 0x20
-	b _08098C56
-_08098C50:
-	movs r0, 0x30
-	b _08098C56
-_08098C54:
-	movs r0, 0x40
-_08098C56:
-	lsls r0, 1
-	ldr r1, =gUnknown_0851017C
-	adds r0, r1
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end stdpal_get
-
-	thumb_func_start sub_8098C64
-sub_8098C64: @ 8098C64
-	ldr r0, =gUnknown_08DDD728
-	bx lr
-	.pool
-	thumb_func_end sub_8098C64
-
-	thumb_func_start sub_8098C6C
-sub_8098C6C: @ 8098C6C
-	push {r4,r5,lr}
-	adds r3, r1, 0
-	adds r4, r2, 0
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r3, 16
-	lsrs r3, 16
-	lsls r4, 24
-	lsrs r4, 24
-	ldr r2, =gUnknown_0851021C
-	ldr r5, =gSaveBlock2Ptr
-	ldr r1, [r5]
-	ldrb r1, [r1, 0x14]
-	lsrs r1, 3
-	lsls r1, 3
-	adds r1, r2
-	ldr r1, [r1]
-	movs r2, 0x90
-	lsls r2, 1
-	bl LoadBgTiles
-	ldr r0, [r5]
-	ldrb r0, [r0, 0x14]
-	lsrs r0, 3
-	bl sub_8098758
-	ldr r0, [r0, 0x4]
-	adds r1, r4, 0
-	movs r2, 0x20
-	bl LoadPalette
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_8098C6C
-
-	.align 2, 0 @ Don't pad with nop.
diff --git a/ld_script.txt b/ld_script.txt
index 75547e82b..ebcf65711 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -86,7 +86,7 @@ SECTIONS {
         asm/map_obj_8097404.o(.text);
         asm/field_message_box.o(.text);
         asm/map_obj_lock.o(.text);
-        asm/text_window.o(.text);
+        src/text_window.o(.text);
         asm/script.o(.text);
         asm/scrcmd.o(.text);
         asm/field_control_avatar.o(.text);
diff --git a/src/text_window.c b/src/text_window.c
new file mode 100644
index 000000000..356e1f339
--- /dev/null
+++ b/src/text_window.c
@@ -0,0 +1,133 @@
+#include "global.h"
+#include "text.h"
+#include "window.h"
+#include "palette.h"
+
+extern u8 LoadBgTiles(u8 bg, const void *src, u16 size, u16 destOffset);
+extern void FillBgTilemapBufferRect(u8 bg, u16 tileNum, u8 x, u8 y, u8 width, u8 height, u8 palette);
+
+struct TilesPal
+{
+    u32* tiles;
+    u16* pal;
+};
+
+extern const struct TilesPal gUnknown_0851021C[];
+extern const u32 gUnknown_08DDD748[];
+extern const u16 gUnknown_0851017C[];
+extern const u16 gUnknown_08DDD728[];
+
+const u16* sub_8098C64(void);
+void sub_809882C(u8 windowId, u16 destOffset, u8 palOffset);
+
+const struct TilesPal* sub_8098758(u8 id)
+{
+    if (id > 19)
+        return &gUnknown_0851021C[0];
+    else
+        return &gUnknown_0851021C[id];
+}
+
+void copy_textbox_border_tile_patterns_to_vram(u8 windowId, u16 destOffset, u8 palOffset)
+{
+    LoadBgTiles(GetWindowAttribute(windowId, WINDOW_PRIORITY), gUnknown_08DDD748, 0x1C0, destOffset);
+    LoadPalette(sub_8098C64(), palOffset, 0x20);
+}
+
+void box_border_load_tiles_and_pal(u8 windowId, u16 destOffset, u8 palOffset)
+{
+    sub_809882C(windowId, destOffset, palOffset);
+}
+
+void sub_80987D4(u8 windowId, u8 frameId, u16 destOffset, u8 palOffset)
+{
+    LoadBgTiles(GetWindowAttribute(windowId, WINDOW_PRIORITY), gUnknown_0851021C[frameId].tiles, 0x120, destOffset);
+    LoadPalette(gUnknown_0851021C[frameId].pal, palOffset, 0x20);
+}
+
+void sub_809882C(u8 windowId, u16 destOffset, u8 palOffset)
+{
+    sub_80987D4(windowId, gSaveBlock2Ptr->optionsWindowFrameType, destOffset, palOffset);
+}
+
+void sub_8098858(u8 windowId, u16 tileNum, u8 palNum)
+{
+    u8 bgLayer = GetWindowAttribute(windowId, WINDOW_PRIORITY);
+    u16 tilemapLeft = GetWindowAttribute(windowId, WINDOW_TILEMAP_LEFT);
+    u16 tilemapTop = GetWindowAttribute(windowId, WINDOW_TILEMAP_TOP);
+    u16 width = GetWindowAttribute(windowId, WINDOW_WIDTH);
+    u16 height = GetWindowAttribute(windowId, WINDOW_HEIGHT);
+
+    FillBgTilemapBufferRect(bgLayer, tileNum + 0, tilemapLeft - 1,      tilemapTop - 1,         1,      1,      palNum);
+    FillBgTilemapBufferRect(bgLayer, tileNum + 1, tilemapLeft,          tilemapTop - 1,         width,  1,      palNum);
+    FillBgTilemapBufferRect(bgLayer, tileNum + 2, tilemapLeft + width,  tilemapTop - 1,         1,      1,      palNum);
+    FillBgTilemapBufferRect(bgLayer, tileNum + 3, tilemapLeft - 1,      tilemapTop,             1,      height, palNum);
+    FillBgTilemapBufferRect(bgLayer, tileNum + 5, tilemapLeft + width,  tilemapTop,             1,      height, palNum);
+    FillBgTilemapBufferRect(bgLayer, tileNum + 6, tilemapLeft - 1,      tilemapTop + height,    1,      1,      palNum);
+    FillBgTilemapBufferRect(bgLayer, tileNum + 7, tilemapLeft,          tilemapTop + height,    width,  1,      palNum);
+    FillBgTilemapBufferRect(bgLayer, tileNum + 8, tilemapLeft + width,  tilemapTop + height,    1,      1,      palNum);
+}
+
+void sub_80989E0(u8 windowId, u16 tileNum, u8 palNum)
+{
+    u8 bgLayer = GetWindowAttribute(windowId, WINDOW_PRIORITY);
+    u16 tilemapLeft = GetWindowAttribute(windowId, WINDOW_TILEMAP_LEFT);
+    u16 tilemapTop = GetWindowAttribute(windowId, WINDOW_TILEMAP_TOP);
+    u16 width = GetWindowAttribute(windowId, WINDOW_WIDTH);
+    u16 height = GetWindowAttribute(windowId, WINDOW_HEIGHT);
+
+    FillBgTilemapBufferRect(bgLayer, tileNum + 0, tilemapLeft,              tilemapTop,                 1,          1,          palNum);
+    FillBgTilemapBufferRect(bgLayer, tileNum + 1, tilemapLeft + 1,          tilemapTop,                 width - 2,  1,          palNum);
+    FillBgTilemapBufferRect(bgLayer, tileNum + 2, tilemapLeft + width - 1,  tilemapTop,                 1,          1,          palNum);
+    FillBgTilemapBufferRect(bgLayer, tileNum + 3, tilemapLeft,              tilemapTop + 1,             1,          height - 2, palNum);
+    FillBgTilemapBufferRect(bgLayer, tileNum + 5, tilemapLeft + width - 1,  tilemapTop + 1,             1,          height - 2, palNum);
+    FillBgTilemapBufferRect(bgLayer, tileNum + 6, tilemapLeft,              tilemapTop + height - 1,    1,          1,          palNum);
+    FillBgTilemapBufferRect(bgLayer, tileNum + 7, tilemapLeft + 1,          tilemapTop + height - 1,    width -     2,  1,      palNum);
+    FillBgTilemapBufferRect(bgLayer, tileNum + 8, tilemapLeft + width - 1,  tilemapTop + height - 1,    1,          1,          palNum);
+}
+
+void rbox_fill_rectangle(u8 windowId)
+{
+    u8 bgLayer = GetWindowAttribute(windowId, WINDOW_PRIORITY);
+    u16 tilemapLeft = GetWindowAttribute(windowId, WINDOW_TILEMAP_LEFT);
+    u16 tilemapTop = GetWindowAttribute(windowId, WINDOW_TILEMAP_TOP);
+    u16 width = GetWindowAttribute(windowId, WINDOW_WIDTH);
+    u16 height = GetWindowAttribute(windowId, WINDOW_HEIGHT);
+
+    FillBgTilemapBufferRect(bgLayer, 0, tilemapLeft - 1, tilemapTop - 1, width + 2, height + 2, 0x11);
+}
+
+const u16* stdpal_get(u8 id)
+{
+    switch (id)
+    {
+    case 0:
+        id = 0;
+        break;
+    case 1:
+        id = 0x10;
+        break;
+    case 2:
+        id = 0x20;
+        break;
+    case 3:
+        id = 0x30;
+        break;
+    case 4:
+    default:
+        id = 0x40;
+        break;
+    }
+    return &gUnknown_0851017C[id];
+}
+
+const u16* sub_8098C64(void)
+{
+    return gUnknown_08DDD728;
+}
+
+void sub_8098C6C(u8 bg, u16 destOffset, u8 palOffset)
+{
+    LoadBgTiles(bg, gUnknown_0851021C[gSaveBlock2Ptr->optionsWindowFrameType].tiles, 0x120, destOffset);
+    LoadPalette(sub_8098758(gSaveBlock2Ptr->optionsWindowFrameType)->pal, palOffset, 0x20);
+}