union_room_chat through sub_81287B4

8 files changed, 361 insertions, 600 deletions

diff --git a/asm/union_room_chat.s b/asm/union_room_chat.s
index adfd66b5d..6f68a333f 100644
--- a/asm/union_room_chat.s
+++ b/asm/union_room_chat.s
@@ -5,593 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_8128420
-sub_8128420: @ 8128420
-	push {r4,lr}
-	ldr r4, _08128450 @ =gUnknown_203B0E0
-	movs r0, 0xDC
-	lsls r0, 1
-	bl Alloc
-	str r0, [r4]
-	bl sub_812845C
-	ldr r1, _08128454 @ =gKeyRepeatStartDelay
-	movs r0, 0x14
-	strh r0, [r1]
-	bl sub_812B4AC
-	movs r0, 0
-	bl SetVBlankCallback
-	ldr r0, _08128458 @ =c2_081284E0
-	bl SetMainCallback2
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08128450: .4byte gUnknown_203B0E0
-_08128454: .4byte gKeyRepeatStartDelay
-_08128458: .4byte c2_081284E0
-	thumb_func_end sub_8128420
-
-	thumb_func_start sub_812845C
-sub_812845C: @ 812845C
-	push {r4-r7,lr}
-	adds r4, r0, 0
-	movs r5, 0
-	movs r0, 0
-	strh r0, [r4, 0x4]
-	strh r0, [r4, 0x6]
-	strb r5, [r4, 0x10]
-	strb r5, [r4, 0x11]
-	strb r5, [r4, 0x12]
-	strb r5, [r4, 0x14]
-	strb r5, [r4, 0x15]
-	strb r5, [r4, 0x16]
-	movs r0, 0xFF
-	strb r0, [r4, 0x1A]
-	bl GetLinkPlayerCount
-	strb r0, [r4, 0xD]
-	bl GetMultiplayerId
-	strb r0, [r4, 0x13]
-	strb r5, [r4, 0x17]
-	strb r5, [r4, 0x18]
-	movs r1, 0xC8
-	lsls r1, 1
-	adds r0, r4, r1
-	bl sub_8129560
-	ldr r7, _081284B4 @ =gSaveBlock1Ptr
-	ldr r6, _081284B8 @ =0x00003ad4
-	adds r4, 0xB9
-	movs r5, 0x9
-_0812849A:
-	ldr r1, [r7]
-	adds r1, r6
-	adds r0, r4, 0
-	bl StringCopy
-	adds r6, 0x15
-	adds r4, 0x15
-	subs r5, 0x1
-	cmp r5, 0
-	bge _0812849A
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081284B4: .4byte gSaveBlock1Ptr
-_081284B8: .4byte 0x00003ad4
-	thumb_func_end sub_812845C
-
-	thumb_func_start sub_81284BC
-sub_81284BC: @ 81284BC
-	push {r4,lr}
-	ldr r4, _081284DC @ =gUnknown_203B0E0
-	ldr r0, [r4]
-	ldrb r0, [r0, 0xE]
-	bl DestroyTask
-	ldr r0, [r4]
-	ldrb r0, [r0, 0xF]
-	bl DestroyTask
-	ldr r0, [r4]
-	bl Free
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081284DC: .4byte gUnknown_203B0E0
-	thumb_func_end sub_81284BC
-
-	thumb_func_start c2_081284E0
-c2_081284E0: @ 81284E0
-	push {r4-r6,lr}
-	sub sp, 0x4
-	ldr r0, _081284FC @ =gMain
-	movs r1, 0x87
-	lsls r1, 3
-	adds r6, r0, r1
-	ldrb r0, [r6]
-	cmp r0, 0x1
-	beq _08128518
-	cmp r0, 0x1
-	bgt _08128500
-	cmp r0, 0
-	beq _08128506
-	b _08128598
-	.align 2, 0
-_081284FC: .4byte gMain
-_08128500:
-	cmp r0, 0x2
-	beq _08128554
-	b _08128598
-_08128506:
-	bl ResetTasks
-	bl ResetSpriteData
-	bl FreeAllSpritePalettes
-	bl sub_8129B14
-	b _08128548
-_08128518:
-	bl sub_8129BFC
-	bl sub_8129B78
-	adds r5, r0, 0
-	cmp r5, 0
-	bne _08128598
-	movs r4, 0x1
-	negs r4, r4
-	adds r0, r4, 0
-	movs r1, 0x10
-	movs r2, 0
-	bl BlendPalettes
-	str r5, [sp]
-	adds r0, r4, 0
-	adds r1, r4, 0
-	movs r2, 0x10
-	movs r3, 0
-	bl BeginNormalPaletteFade
-	ldr r0, _08128550 @ =sub_81285B4
-	bl SetVBlankCallback
-_08128548:
-	ldrb r0, [r6]
-	adds r0, 0x1
-	strb r0, [r6]
-	b _08128598
-	.align 2, 0
-_08128550: .4byte sub_81285B4
-_08128554:
-	bl UpdatePaletteFade
-	ldr r0, _081285A0 @ =gPaletteFade
-	ldrb r1, [r0, 0x7]
-	movs r0, 0x80
-	ands r0, r1
-	cmp r0, 0
-	bne _08128598
-	ldr r0, _081285A4 @ =sub_81285CC
-	bl SetMainCallback2
-	movs r0, 0x11
-	movs r1, 0
-	bl SetQuestLogEvent
-	ldr r0, _081285A8 @ =sub_81285E8
-	movs r1, 0x8
-	bl CreateTask
-	ldr r4, _081285AC @ =gUnknown_203B0E0
-	ldr r1, [r4]
-	strb r0, [r1, 0xE]
-	ldr r0, _081285B0 @ =sub_81298F8
-	movs r1, 0x7
-	bl CreateTask
-	ldr r1, [r4]
-	strb r0, [r1, 0xF]
-	bl LoadWirelessStatusIndicatorSpriteGfx
-	movs r0, 0xE8
-	movs r1, 0x96
-	bl CreateWirelessStatusIndicatorSprite
-_08128598:
-	add sp, 0x4
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_081285A0: .4byte gPaletteFade
-_081285A4: .4byte sub_81285CC
-_081285A8: .4byte sub_81285E8
-_081285AC: .4byte gUnknown_203B0E0
-_081285B0: .4byte sub_81298F8
-	thumb_func_end c2_081284E0
-
-	thumb_func_start sub_81285B4
-sub_81285B4: @ 81285B4
-	push {lr}
-	bl TransferPlttBuffer
-	bl LoadOam
-	bl ProcessSpriteCopyRequests
-	bl ScanlineEffect_InitHBlankDmaTransfer
-	pop {r0}
-	bx r0
-	thumb_func_end sub_81285B4
-
-	thumb_func_start sub_81285CC
-sub_81285CC: @ 81285CC
-	push {lr}
-	bl RunTasks
-	bl sub_8129BFC
-	bl AnimateSprites
-	bl BuildOamBuffer
-	bl UpdatePaletteFade
-	pop {r0}
-	bx r0
-	thumb_func_end sub_81285CC
-
-	thumb_func_start sub_81285E8
-sub_81285E8: @ 81285E8
-	push {r4,lr}
-	ldr r4, _08128600 @ =gUnknown_203B0E0
-	ldr r0, [r4]
-	ldrb r0, [r0, 0x17]
-	cmp r0, 0x2
-	beq _0812860E
-	cmp r0, 0x2
-	bgt _08128604
-	cmp r0, 0x1
-	beq _0812860A
-	b _0812861E
-	.align 2, 0
-_08128600: .4byte gUnknown_203B0E0
-_08128604:
-	cmp r0, 0x3
-	beq _08128612
-	b _0812861E
-_0812860A:
-	movs r0, 0x6
-	b _08128614
-_0812860E:
-	movs r0, 0x7
-	b _08128614
-_08128612:
-	movs r0, 0x8
-_08128614:
-	bl sub_8129218
-	ldr r1, [r4]
-	movs r0, 0
-	strb r0, [r1, 0x17]
-_0812861E:
-	ldr r1, _08128638 @ =gUnknown_845A880
-	ldr r0, _0812863C @ =gUnknown_203B0E0
-	ldr r0, [r0]
-	ldrh r0, [r0, 0x4]
-	lsls r0, 2
-	adds r0, r1
-	ldr r0, [r0]
-	bl _call_via_r0
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08128638: .4byte gUnknown_845A880
-_0812863C: .4byte gUnknown_203B0E0
-	thumb_func_end sub_81285E8
-
-	thumb_func_start sub_8128640
-sub_8128640: @ 8128640
-	push {r4,lr}
-	ldr r4, _08128658 @ =gUnknown_203B0E0
-	ldr r0, [r4]
-	ldrh r1, [r0, 0x6]
-	cmp r1, 0x1
-	beq _08128674
-	cmp r1, 0x1
-	bgt _0812865C
-	cmp r1, 0
-	beq _08128662
-	b _081286BC
-	.align 2, 0
-_08128658: .4byte gUnknown_203B0E0
-_0812865C:
-	cmp r1, 0x2
-	beq _081286AC
-	b _081286BC
-_08128662:
-	movs r1, 0xC8
-	lsls r1, 1
-	adds r0, r1
-	bl sub_8129568
-	ldr r1, [r4]
-	ldrh r0, [r1, 0x6]
-	adds r0, 0x1
-	strh r0, [r1, 0x6]
-_08128674:
-	bl IsLinkTaskFinished
-	lsls r0, 24
-	cmp r0, 0
-	beq _081286BC
-	bl sub_80FBA1C
-	cmp r0, 0
-	bne _081286BC
-	ldr r4, _081286A8 @ =gUnknown_203B0E0
-	ldr r1, [r4]
-	movs r0, 0xC8
-	lsls r0, 1
-	adds r1, r0
-	movs r0, 0
-	movs r2, 0x28
-	bl SendBlock
-	lsls r0, 24
-	cmp r0, 0
-	beq _081286BC
-	ldr r1, [r4]
-	ldrh r0, [r1, 0x6]
-	adds r0, 0x1
-	strh r0, [r1, 0x6]
-	b _081286BC
-	.align 2, 0
-_081286A8: .4byte gUnknown_203B0E0
-_081286AC:
-	bl IsLinkTaskFinished
-	lsls r0, 24
-	cmp r0, 0
-	beq _081286BC
-	movs r0, 0x1
-	bl sub_8129218
-_081286BC:
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_8128640
-
-	thumb_func_start sub_81286C4
-sub_81286C4: @ 81286C4
-	push {r4,r5,lr}
-	ldr r5, _081286D8 @ =gUnknown_203B0E0
-	ldr r3, [r5]
-	ldrh r0, [r3, 0x6]
-	cmp r0, 0
-	beq _081286DC
-	cmp r0, 0x1
-	beq _0812878A
-	b _081287AC
-	.align 2, 0
-_081286D8: .4byte gUnknown_203B0E0
-_081286DC:
-	ldr r1, _081286F8 @ =gMain
-	ldrh r2, [r1, 0x2E]
-	movs r0, 0x8
-	ands r0, r2
-	cmp r0, 0
-	beq _081286FC
-	ldrb r0, [r3, 0x15]
-	cmp r0, 0
-	beq _081287AC
-	movs r0, 0x4
-	bl sub_8129218
-	b _081287AC
-	.align 2, 0
-_081286F8: .4byte gMain
-_081286FC:
-	movs r0, 0x4
-	ands r0, r2
-	cmp r0, 0
-	beq _0812870C
-	movs r0, 0x2
-	bl sub_8129218
-	b _081287AC
-_0812870C:
-	ldrh r1, [r1, 0x30]
-	movs r0, 0x2
-	ands r0, r1
-	cmp r0, 0
-	beq _08128738
-	ldrb r0, [r3, 0x15]
-	cmp r0, 0
-	beq _08128730
-	bl sub_81293AC
-	movs r0, 0x8
-	movs r1, 0
-	bl sub_8129C34
-	ldr r1, [r5]
-	movs r0, 0x1
-	strh r0, [r1, 0x6]
-	b _081287AC
-_08128730:
-	movs r0, 0x3
-	bl sub_8129218
-	b _081287AC
-_08128738:
-	movs r4, 0x1
-	adds r0, r4, 0
-	ands r0, r2
-	cmp r0, 0
-	beq _08128754
-	bl sub_81292D8
-	movs r0, 0x8
-	movs r1, 0
-	bl sub_8129C34
-	movs r0, 0x2
-	movs r1, 0x1
-	b _08128780
-_08128754:
-	movs r0, 0x80
-	lsls r0, 1
-	ands r0, r2
-	cmp r0, 0
-	beq _08128774
-	ldrb r0, [r3, 0x10]
-	cmp r0, 0x3
-	beq _0812876C
-	bl sub_81293D8
-	movs r0, 0x8
-	b _0812877E
-_0812876C:
-	movs r0, 0x5
-	bl sub_8129218
-	b _081287AC
-_08128774:
-	bl sub_8129228
-	cmp r0, 0
-	beq _081287AC
-	movs r0, 0x1
-_0812877E:
-	movs r1, 0
-_08128780:
-	bl sub_8129C34
-	ldr r0, [r5]
-	strh r4, [r0, 0x6]
-	b _081287AC
-_0812878A:
-	movs r0, 0
-	bl sub_8129C8C
-	adds r4, r0, 0
-	lsls r4, 24
-	lsrs r4, 24
-	movs r0, 0x1
-	bl sub_8129C8C
-	lsls r0, 24
-	lsrs r1, r0, 24
-	cmp r4, 0
-	bne _081287AC
-	cmp r1, 0
-	bne _081287AC
-	ldr r0, [r5]
-	strh r1, [r0, 0x6]
-_081287AC:
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_81286C4
-
-	thumb_func_start sub_81287B4
-sub_81287B4: @ 81287B4
-	push {r4-r6,lr}
-	ldr r0, _081287CC @ =gUnknown_203B0E0
-	ldr r0, [r0]
-	ldrh r0, [r0, 0x6]
-	cmp r0, 0x4
-	bls _081287C2
-	b _081288CE
-_081287C2:
-	lsls r0, 2
-	ldr r1, _081287D0 @ =_081287D4
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_081287CC: .4byte gUnknown_203B0E0
-_081287D0: .4byte _081287D4
-	.align 2, 0
-_081287D4:
-	.4byte _081287E8
-	.4byte _081287F2
-	.4byte _08128810
-	.4byte _0812889C
-	.4byte _081288B0
-_081287E8:
-	movs r0, 0x3
-	movs r1, 0
-	bl sub_8129C34
-	b _081287FE
-_081287F2:
-	movs r0, 0
-	bl sub_8129C8C
-	lsls r0, 24
-	cmp r0, 0
-	bne _081288CE
-_081287FE:
-	ldr r0, _0812880C @ =gUnknown_203B0E0
-	ldr r1, [r0]
-	ldrh r0, [r1, 0x6]
-	adds r0, 0x1
-	strh r0, [r1, 0x6]
-	b _081288CE
-	.align 2, 0
-_0812880C: .4byte gUnknown_203B0E0
-_08128810:
-	bl Menu_ProcessInput
-	lsls r0, 24
-	asrs r0, 8
-	lsrs r6, r0, 16
-	asrs r4, r0, 16
-	movs r0, 0x2
-	negs r0, r0
-	cmp r4, r0
-	beq _08128848
-	adds r0, 0x1
-	cmp r4, r0
-	beq _08128868
-	movs r0, 0x4
-	movs r1, 0
-	bl sub_8129C34
-	ldr r5, _08128844 @ =gUnknown_203B0E0
-	ldr r2, [r5]
-	ldrb r0, [r2, 0x10]
-	cmp r0, r4
-	beq _08128870
-	cmp r4, 0x3
-	ble _08128880
-	b _08128870
-	.align 2, 0
-_08128844: .4byte gUnknown_203B0E0
-_08128848:
-	ldr r0, _08128864 @ =gMain
-	ldrh r1, [r0, 0x2E]
-	movs r0, 0x4
-	ands r0, r1
-	cmp r0, 0
-	beq _081288CE
-	movs r0, 0x5
-	bl PlaySE
-	movs r0, 0x1
-	bl Menu_MoveCursor
-	b _081288CE
-	.align 2, 0
-_08128864: .4byte gMain
-_08128868:
-	movs r0, 0x4
-	movs r1, 0
-	bl sub_8129C34
-_08128870:
-	ldr r0, _0812887C @ =gUnknown_203B0E0
-	ldr r1, [r0]
-	movs r0, 0x3
-	strh r0, [r1, 0x6]
-	b _081288CE
-	.align 2, 0
-_0812887C: .4byte gUnknown_203B0E0
-_08128880:
-	movs r1, 0
-	strb r1, [r2, 0x11]
-	ldr r0, [r5]
-	strb r1, [r0, 0x12]
-	movs r0, 0x5
-	movs r1, 0x1
-	bl sub_8129C34
-	ldr r0, [r5]
-	strb r6, [r0, 0x10]
-	ldr r1, [r5]
-	movs r0, 0x4
-	strh r0, [r1, 0x6]
-	b _081288CE
-_0812889C:
-	movs r0, 0
-	bl sub_8129C8C
-	lsls r0, 24
-	cmp r0, 0
-	bne _081288CE
-	movs r0, 0x1
-	bl sub_8129218
-	b _081288CE
-_081288B0:
-	movs r0, 0
-	bl sub_8129C8C
-	lsls r0, 24
-	cmp r0, 0
-	bne _081288CE
-	movs r0, 0x1
-	bl sub_8129C8C
-	lsls r0, 24
-	cmp r0, 0
-	bne _081288CE
-	movs r0, 0x1
-	bl sub_8129218
-_081288CE:
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_81287B4
-
 	thumb_func_start sub_81288D4
 sub_81288D4: @ 81288D4
 	push {r4,lr}
diff --git a/data/union_room_chat.s b/data/union_room_chat.s
index b61c5f44d..84f9d9c39 100644
--- a/data/union_room_chat.s
+++ b/data/union_room_chat.s
@@ -6,18 +6,6 @@
 	.section .rodata
 	.align 2
 
-gUnknown_845A880:: @ 845A880
-	.4byte sub_8128640
-	.4byte sub_81286C4
-	.4byte sub_81287B4
-	.4byte sub_81288D4
-	.4byte sub_8128DA4
-	.4byte sub_8128E78
-	.4byte sub_8128AA0
-	.4byte sub_8128C04
-	.4byte sub_8128CA8
-	.4byte sub_8128FB8
-
 gUnknown_845A8A8:: @ 845A8A8
 	.byte 0x09, 0x09, 0x09, 0x09
 
diff --git a/include/global.h b/include/global.h
index 180a1e0a3..686ecb11c 100644
--- a/include/global.h
+++ b/include/global.h
@@ -718,6 +718,8 @@ struct TrainerNameRecord
     u8 trainerName[PLAYER_NAME_LENGTH];
 };
 
+#define UNION_ROOM_KB_ROW_COUNT 10
+
 struct SaveBlock1
 {
     /*0x0000*/ struct Coords16 pos;
@@ -772,7 +774,8 @@ struct SaveBlock1
     /*0x3A18*/ u8 seen2[DEX_FLAGS_NO];
     /*0x3A4C*/ u8 rivalName[PLAYER_NAME_LENGTH];
     /*0x3A54*/ struct FameCheckerSaveData fameChecker[NUM_FAMECHECKER_PERSONS];
-    /*0x3A94*/ u8 filler3A94[0x114];
+    /*0x3A94*/ u8 filler3A94[0x40];
+    /*0x3AD4*/ u8 unk3AD4[UNION_ROOM_KB_ROW_COUNT][21];
     /*0x3BA8*/ struct TrainerNameRecord trainerNameRecords[20];
     /*0x3C98*/ struct DaycareMon route5DayCareMon;
     /*0x3D24*/ u8 filler3D24[0x10];
diff --git a/include/help_system.h b/include/help_system.h
index 273b5e119..59adec912 100644
--- a/include/help_system.h
+++ b/include/help_system.h
@@ -92,5 +92,6 @@ bool8 MoveCursor(u8 by, u8 dirn);
 void HelpSystem_BackupSomeVariable(void);
 void HelpSystem_RestoreSomeVariable(void);
 void HelpSystemRenderText(u8 font, u8 * dest, const u8 * src, u8 x, u8 y, u8 width, u8 height);
+void sub_812B4AC(void);
 
 #endif //GUARD_HELP_SYSTEM_H
diff --git a/include/link_rfu.h b/include/link_rfu.h
index 790429870..2e502165a 100644
--- a/include/link_rfu.h
+++ b/include/link_rfu.h
@@ -325,6 +325,7 @@ void sub_80FC114(const u8 *name, struct GFtgtGname *structPtr, u8 a2);
 bool32 PlayerHasMetTrainerBefore(u16 id, u8 *name);
 bool8 sub_80FCC3C(struct GFtgtGname *gname, u8 *uname, u8 idx);
 bool8 sub_80FCCF4(struct GFtgtGname *gname, u8 *uname, u8 idx);
+bool32 sub_80FBA1C(void);
 
 #include "mevent_server.h"
 extern const struct mevent_server_cmd gMEventSrvScript_OtherTrainerCanceled[];
diff --git a/include/main.h b/include/main.h
index c962cf7bd..f89ffbd63 100644
--- a/include/main.h
+++ b/include/main.h
@@ -73,5 +73,6 @@ extern const char RomHeaderGameCode[4];
 extern const char RomHeaderSoftwareVersion;
 
 extern u8 gLinkTransferringData;
+extern u16 gKeyRepeatStartDelay;
 
 #endif // GUARD_MAIN_H
diff --git a/ld_script.txt b/ld_script.txt
index f0792ad9d..c21f61f53 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -246,6 +246,7 @@ SECTIONS {
         src/union_room_battle.o(.text);
         asm/pokemon_special_anim.o(.text);
         src/party_menu.o(.text);
+        src/union_room_chat.o(.text);
         asm/union_room_chat.o(.text);
         src/help_system_812B1E0.o(.text);
         src/quest_log_battle.o(.text);
@@ -534,6 +535,7 @@ SECTIONS {
         src/union_room_message.o(.rodata);
         data/pokemon_special_anim.o(.rodata);
         src/party_menu.o(.rodata);
+        src/union_room_chat.o(.rodata);
         data/union_room_chat.o(.rodata);
         src/help_system_812B1E0.o(.rodata);
         src/fame_checker.o(.rodata);
diff --git a/src/union_room_chat.c b/src/union_room_chat.c
new file mode 100644
index 000000000..813d20e5f
--- /dev/null
+++ b/src/union_room_chat.c
@@ -0,0 +1,352 @@
+#include "global.h"
+#include "gflib.h"
+#include "help_system.h"
+#include "link.h"
+#include "link_rfu.h"
+#include "list_menu.h"
+#include "menu.h"
+#include "quest_log.h"
+#include "scanline_effect.h"
+#include "task.h"
+#include "constants/songs.h"
+
+enum
+{
+    UNION_ROOM_KB_PAGE_UPPER,
+    UNION_ROOM_KB_PAGE_LOWER,
+    UNION_ROOM_KB_PAGE_EMOJI,
+    UNION_ROOM_KB_PAGE_COUNT
+};
+
+struct UnionRoomChat
+{
+    u8 filler0[0x4];
+    u16 unk4;
+    u16 unk6;
+    u8 filler8[0x2];
+    u16 unkA;
+    u8 fillerC[0x1];
+    u8 unkD;
+    u8 unkE;
+    u8 unkF;
+    u8 currentPage;
+    u8 unk11;
+    u8 currentRow;
+    u8 unk13;
+    u8 unk14;
+    u8 unk15;
+    u8 unk16;
+    u8 unk17;
+    u8 unk18;
+    u8 unk19;
+    u8 unk1A[0x1F];
+    u8 unk39[0x40];
+    u8 unk79[0x40];
+    u8 unkB9[UNION_ROOM_KB_ROW_COUNT][21];
+    u8 filler18B[0x5];
+    u8 unk190[0x28];
+};
+
+EWRAM_DATA struct UnionRoomChat * gUnknown_203B0E0 = NULL;
+
+void sub_812845C(struct UnionRoomChat * unionRoomChat);
+void c2_081284E0(void);
+void sub_81285B4(void);
+void sub_81285CC(void);
+void sub_81285E8(u8 taskId);
+void sub_8128640(void);
+void sub_81286C4(void);
+void sub_81287B4(void);
+void sub_81288D4(void);
+void sub_8128DA4(void);
+void sub_8128E78(void);
+void sub_8128AA0(void);
+void sub_8128C04(void);
+void sub_8128CA8(void);
+void sub_8128FB8(void);
+void sub_8129218(u16 a0);
+bool32 sub_8129228(void);
+void sub_81292D8(void);
+void sub_81293AC(void);
+void sub_81293D8(void);
+void sub_8129560(u8 *ptr);
+void sub_8129568(u8 *ptr);
+void sub_81298F8(u8 taskId);
+void sub_8129B14(void);
+bool32 sub_8129B78(void);
+void sub_8129BFC(void);
+void sub_8129C34(u16 a0, u8 a1);
+u8 sub_8129C8C(u8 a0);
+
+static void (*const gUnknown_845A880[])(void) = {
+    sub_8128640,
+    sub_81286C4,
+    sub_81287B4,
+    sub_81288D4,
+    sub_8128DA4,
+    sub_8128E78,
+    sub_8128AA0,
+    sub_8128C04,
+    sub_8128CA8,
+    sub_8128FB8
+};
+
+void sub_8128420(void)
+{
+    gUnknown_203B0E0 = Alloc(sizeof(struct UnionRoomChat));
+    sub_812845C(gUnknown_203B0E0);
+    gKeyRepeatStartDelay = 20;
+    sub_812B4AC();
+    SetVBlankCallback(NULL);
+    SetMainCallback2(c2_081284E0);
+}
+
+void sub_812845C(struct UnionRoomChat * unionRoomChat)
+{
+    int i;
+
+    unionRoomChat->unk4 = 0;
+    unionRoomChat->unk6 = 0;
+    unionRoomChat->currentPage = 0;
+    unionRoomChat->unk11 = 0;
+    unionRoomChat->currentRow = 0;
+    unionRoomChat->unk14 = 0;
+    unionRoomChat->unk15 = 0;
+    unionRoomChat->unk16 = 0;
+    unionRoomChat->unk1A[0] = EOS;
+    unionRoomChat->unkD = GetLinkPlayerCount();
+    unionRoomChat->unk13 = GetMultiplayerId();
+    unionRoomChat->unk17 = 0;
+    unionRoomChat->unk18 = 0;
+    sub_8129560(unionRoomChat->unk190);
+    for (i = 0; i < UNION_ROOM_KB_ROW_COUNT; i++)
+        StringCopy(unionRoomChat->unkB9[i], gSaveBlock1Ptr->unk3AD4[i]);
+}
+
+void sub_81284BC(void)
+{
+    DestroyTask(gUnknown_203B0E0->unkE);
+    DestroyTask(gUnknown_203B0E0->unkF);
+    Free(gUnknown_203B0E0);
+}
+
+void c2_081284E0(void)
+{
+    switch (gMain.state)
+    {
+    case 0:
+        ResetTasks();
+        ResetSpriteData();
+        FreeAllSpritePalettes();
+        sub_8129B14();
+        gMain.state++;
+        break;
+    case 1:
+        sub_8129BFC();
+        if (!sub_8129B78())
+        {
+            BlendPalettes(0xFFFFFFFF, 16, RGB_BLACK);
+            BeginNormalPaletteFade(0xFFFFFFFF, -1, 16, 0, RGB_BLACK);
+            SetVBlankCallback(sub_81285B4);
+            gMain.state++;
+        }
+        break;
+    case 2:
+        UpdatePaletteFade();
+        if (!gPaletteFade.active)
+        {
+            SetMainCallback2(sub_81285CC);
+            SetQuestLogEvent(QL_EVENT_USED_UNION_ROOM_CHAT, NULL);
+            gUnknown_203B0E0->unkE = CreateTask(sub_81285E8, 8);
+            gUnknown_203B0E0->unkF = CreateTask(sub_81298F8, 7);
+            LoadWirelessStatusIndicatorSpriteGfx();
+            CreateWirelessStatusIndicatorSprite(232, 150);
+        }
+        break;
+    }
+}
+
+void sub_81285B4(void)
+{
+    TransferPlttBuffer();
+    LoadOam();
+    ProcessSpriteCopyRequests();
+    ScanlineEffect_InitHBlankDmaTransfer();
+}
+
+void sub_81285CC(void)
+{
+    RunTasks();
+    sub_8129BFC();
+    AnimateSprites();
+    BuildOamBuffer();
+    UpdatePaletteFade();
+}
+
+void sub_81285E8(u8 taskId)
+{
+    switch (gUnknown_203B0E0->unk17)
+    {
+    case 1:
+        sub_8129218(6);
+        gUnknown_203B0E0->unk17 = 0;
+        break;
+    case 2:
+        sub_8129218(7);
+        gUnknown_203B0E0->unk17 = 0;
+        break;
+    case 3:
+        sub_8129218(8);
+        gUnknown_203B0E0->unk17 = 0;
+        break;
+    }
+
+    gUnknown_845A880[gUnknown_203B0E0->unk4]();
+}
+
+void sub_8128640(void)
+{
+    switch (gUnknown_203B0E0->unk6)
+    {
+    case 0:
+        sub_8129568(gUnknown_203B0E0->unk190);
+        gUnknown_203B0E0->unk6++;
+        // fall through
+    case 1:
+        if (IsLinkTaskFinished() && !sub_80FBA1C())
+        {
+            if (SendBlock(0, gUnknown_203B0E0->unk190, sizeof(gUnknown_203B0E0->unk190)))
+                gUnknown_203B0E0->unk6++;
+        }
+        break;
+    case 2:
+        if (IsLinkTaskFinished())
+            sub_8129218(1);
+        break;
+    }
+}
+
+void sub_81286C4(void)
+{
+    bool8 var0, var1;
+
+    switch (gUnknown_203B0E0->unk6)
+    {
+    case 0:
+        if (JOY_NEW(START_BUTTON))
+        {
+            if (gUnknown_203B0E0->unk15)
+                sub_8129218(4);
+        }
+        else if (JOY_NEW(SELECT_BUTTON))
+        {
+            sub_8129218(2);
+        }
+        else if (JOY_REPT(B_BUTTON))
+        {
+            if (gUnknown_203B0E0->unk15)
+            {
+                sub_81293AC();
+                sub_8129C34(8, 0);
+                gUnknown_203B0E0->unk6 = 1;
+            }
+            else
+            {
+                sub_8129218(3);
+            }
+        }
+        else if (JOY_NEW(A_BUTTON))
+        {
+            sub_81292D8();
+            sub_8129C34(8, 0);
+            sub_8129C34(2, 1);
+            gUnknown_203B0E0->unk6 = 1;
+        }
+        else if (JOY_NEW(R_BUTTON))
+        {
+            if (gUnknown_203B0E0->currentPage != UNION_ROOM_KB_PAGE_COUNT)
+            {
+                sub_81293D8();
+                sub_8129C34(8, 0);
+                gUnknown_203B0E0->unk6 = 1;
+            }
+            else
+            {
+                sub_8129218(5);
+            }
+        }
+        else if (sub_8129228())
+        {
+            sub_8129C34(1, 0);
+            gUnknown_203B0E0->unk6 = 1;
+        }
+        break;
+    case 1:
+        var0 = sub_8129C8C(0);
+        var1 = sub_8129C8C(1);
+        if (!var0 && !var1)
+            gUnknown_203B0E0->unk6 = 0;
+        break;
+    }
+}
+
+void sub_81287B4(void)
+{
+    s16 input;
+    int var0;
+
+    switch (gUnknown_203B0E0->unk6)
+    {
+    case 0:
+        sub_8129C34(3, 0);
+        gUnknown_203B0E0->unk6++;
+        break;
+    case 1:
+        if (!sub_8129C8C(0))
+            gUnknown_203B0E0->unk6++;
+        break;
+    case 2:
+        input = Menu_ProcessInput();
+        switch (input)
+        {
+        default:
+            sub_8129C34(4, 0);
+            var0 = 1;
+            if (gUnknown_203B0E0->currentPage == input || input > UNION_ROOM_KB_PAGE_COUNT)
+                var0 = 0;
+            break;
+        case MENU_NOTHING_CHOSEN:
+            if (gMain.newKeys & SELECT_BUTTON)
+            {
+                PlaySE(SE_SELECT);
+                Menu_MoveCursor(1);
+            }
+            return;
+        case MENU_B_PRESSED:
+            sub_8129C34(4, 0);
+            gUnknown_203B0E0->unk6 = 3;
+            return;
+        }
+
+        if (!var0)
+        {
+            gUnknown_203B0E0->unk6 = 3;
+            return;
+        }
+
+        gUnknown_203B0E0->unk11 = 0;
+        gUnknown_203B0E0->currentRow = 0;
+        sub_8129C34(5, 1);
+        gUnknown_203B0E0->currentPage = input;
+        gUnknown_203B0E0->unk6 = 4;
+        break;
+    case 3:
+        if (!sub_8129C8C(0))
+            sub_8129218(1);
+        break;
+    case 4:
+        if (!sub_8129C8C(0) && !sub_8129C8C(1))
+            sub_8129218(1);
+        break;
+    }
+}