through CB2_LinkError

asm/link.s

@@ -5,169 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_800AEB4
-sub_800AEB4: @ 800AEB4
-	push {lr}
-	ldr r0, =gLinkOpen
-	ldrb r0, [r0]
-	cmp r0, 0
-	beq _0800AEF4
-	ldr r0, =gLinkStatus
-	ldr r2, [r0]
-	movs r0, 0xFE
-	lsls r0, 11
-	ands r0, r2
-	cmp r0, 0
-	beq _0800AEF4
-	ldr r0, =gSuppressLinkErrorMessage
-	ldrb r0, [r0]
-	cmp r0, 0
-	bne _0800AEEA
-	ldr r1, =gUnknown_02022B00
-	str r2, [r1]
-	ldr r0, =gUnknown_03004130
-	ldrb r0, [r0]
-	strb r0, [r1, 0x4]
-	ldr r0, =gUnknown_03003160
-	ldrb r0, [r0]
-	strb r0, [r1, 0x5]
-	ldr r0, =CB2_LinkError
-	bl SetMainCallback2
-_0800AEEA:
-	ldr r1, =gLinkErrorOccurred
-	movs r0, 0x1
-	strb r0, [r1]
-	bl CloseLink
-_0800AEF4:
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_800AEB4
-
-	thumb_func_start sub_800AF18
-sub_800AF18: @ 800AF18
-	push {r4,lr}
-	ldr r4, =gUnknown_02022B00
-	str r0, [r4]
-	strb r1, [r4, 0x5]
-	strb r2, [r4, 0x4]
-	strb r3, [r4, 0x6]
-	pop {r4}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_800AF18
-
-	thumb_func_start CB2_LinkError
-CB2_LinkError: @ 800AF30
-	push {r4,lr}
-	movs r0, 0
-	movs r1, 0
-	bl SetGpuReg
-	ldr r0, =gMPlay_SE1
-	bl m4aMPlayStop
-	ldr r0, =gMPlay_SE2
-	bl m4aMPlayStop
-	ldr r0, =gMPlay_SE3
-	bl m4aMPlayStop
-	ldr r0, =0x02000000
-	movs r1, 0xE0
-	lsls r1, 9
-	bl InitHeap
-	bl ResetSpriteData
-	bl FreeAllSpritePalettes
-	bl ResetPaletteFadeControl
-	movs r0, 0
-	movs r1, 0
-	movs r2, 0x2
-	bl FillPalette
-	bl ResetTasks
-	bl remove_some_task
-	ldr r1, =gSerialIsRFU
-	ldrb r0, [r1]
-	cmp r0, 0
-	beq _0800AF8C
-	ldr r0, =gUnknown_02022B00
-	ldrb r0, [r0, 0x6]
-	cmp r0, 0
-	bne _0800AF88
-	movs r0, 0x3
-	strb r0, [r1]
-_0800AF88:
-	bl sub_800E604
-_0800AF8C:
-	ldr r0, =sub_80096BC
-	bl SetVBlankCallback
-	movs r0, 0
-	bl ResetBgsAndClearDma3BusyFlags
-	ldr r1, =gUnknown_082ED1FC
-	movs r0, 0
-	movs r2, 0x2
-	bl InitBgsFromTemplates
-	ldr r4, =gUnknown_02022B0C
-	movs r0, 0x80
-	lsls r0, 4
-	bl Alloc
-	adds r1, r0, 0
-	str r1, [r4]
-	movs r0, 0x1
-	bl SetBgTilemapBuffer
-	ldr r0, =gUnknown_082ED204
-	bl InitWindows
-	lsls r0, 16
-	cmp r0, 0
-	beq _0800B03C
-	bl DeactivateAllTextPrinters
-	bl reset_temp_tile_data_buffers
-	movs r0, 0x50
-	movs r1, 0
-	bl SetGpuReg
-	movs r0, 0x52
-	movs r1, 0
-	bl SetGpuReg
-	movs r0, 0x10
-	movs r1, 0
-	bl SetGpuReg
-	movs r0, 0x12
-	movs r1, 0
-	bl SetGpuReg
-	movs r0, 0x14
-	movs r1, 0
-	bl SetGpuReg
-	movs r0, 0x16
-	movs r1, 0
-	bl SetGpuReg
-	movs r1, 0xE0
-	lsls r1, 8
-	movs r0, 0
-	bl ClearGpuRegBits
-	ldr r0, =gUnknown_0860F074
-	movs r1, 0xF0
-	movs r2, 0x20
-	bl LoadPalette
-	ldr r1, =gSoftResetDisabled
-	movs r0, 0
-	strb r0, [r1]
-	ldr r0, =Task_DestroySelf
-	movs r1, 0
-	bl CreateTask
-	bl StopMapMusic
-	ldr r1, =gMain
-	movs r0, 0
-	str r0, [r1]
-	bl RunTasks
-	bl AnimateSprites
-	bl BuildOamBuffer
-	bl UpdatePaletteFade
-	ldr r0, =sub_800B1A0
-	bl SetMainCallback2
-_0800B03C:
-	pop {r4}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end CB2_LinkError
-
 	thumb_func_start sub_800B080
 sub_800B080: @ 800B080
 	push {r4,r5,lr}
@@ -311,7 +148,7 @@ _0800B1D2:
 	beq _0800B214
 	b _0800B260
 _0800B1D8:
-	ldr r0, =gUnknown_02022B00
+	ldr r0, =sLinkErrorBuffer
 	ldrb r0, [r0, 0x6]
 	cmp r0, 0
 	beq _0800B1EC
@@ -324,7 +161,7 @@ _0800B1EC:
 _0800B1F2:
 	movs r0, 0
 	bl ShowBg
-	ldr r0, =gUnknown_02022B00
+	ldr r0, =sLinkErrorBuffer
 	ldrb r0, [r0, 0x6]
 	cmp r0, 0
 	beq _0800B260
@@ -388,7 +225,7 @@ _0800B260:
 	bl PlaySE
 	movs r0, 0
 	strb r0, [r4]
-	ldr r1, =gUnknown_02022B00
+	ldr r1, =sLinkErrorBuffer
 	movs r0, 0
 	strb r0, [r1, 0x6]
 	bl sub_81700F8
@@ -803,9 +640,9 @@ EnableSerial: @ 800B594
 	strb r4, [r0]
 	ldr r0, =gUnknown_03000D73
 	strb r4, [r0]
-	ldr r0, =gUnknown_03003160
+	ldr r0, =gLastSendQueueCount
 	strb r4, [r0]
-	ldr r0, =gUnknown_03004130
+	ldr r0, =gLastRecvQueueCount
 	strb r4, [r0]
 	add sp, 0x4
 	pop {r4,r5}
@@ -1051,7 +888,7 @@ _0800B7FE:
 	movs r2, 0
 	ldr r4, =gUnknown_03000D6E
 	mov r9, r4
-	ldr r1, =gUnknown_03003160
+	ldr r1, =gLastSendQueueCount
 	mov r10, r1
 	lsls r5, r0, 1
 	movs r0, 0x18
@@ -1084,7 +921,7 @@ _0800B850:
 	strb r0, [r6, 0x12]
 	ldr r2, =gUnknown_03000D6E
 	mov r9, r2
-	ldr r4, =gUnknown_03003160
+	ldr r4, =gLastSendQueueCount
 	mov r10, r4
 _0800B85C:
 	mov r1, r9
@@ -1374,7 +1211,7 @@ _0800BA8A:
 	asrs r0, 24
 	cmp r0, 0x8
 	bne _0800BAAA
-	ldr r0, =gUnknown_03004130
+	ldr r0, =gLastRecvQueueCount
 	ldr r2, =0x00000fbd
 	adds r1, r3, r2
 	ldrb r1, [r1]

common_syms/link.txt

@@ -29,9 +29,9 @@ gBlockRequestType
 gFiller_03003154
 gFiller_03003158
 gFiller_0300315c
-gUnknown_03003160
+gLastSendQueueCount
 gLink
-gUnknown_03004130
+gLastRecvQueueCount
 gUnknown_03004134
 gFiller_03004138
 gFiller_0300413C

include/link.h

@@ -17,6 +17,7 @@
 #define LINK_STAT_RECEIVED_NOTHING       0x00000100
 #define LINK_STAT_RECEIVED_NOTHING_SHIFT 8
 #define LINK_STAT_ERRORS                 0x0007F000
+#define LINK_STAT_ERRORS_SHIFT           12
 
 #define EXTRACT_PLAYER_COUNT(status) \
 (((status) & LINK_STAT_PLAYER_COUNT) >> LINK_STAT_PLAYER_COUNT_SHIFT)
@@ -26,6 +27,8 @@
 (((status) >> LINK_STAT_CONN_ESTABLISHED_SHIFT) & 1)
 #define EXTRACT_RECEIVED_NOTHING(status) \
 (((status) >> LINK_STAT_RECEIVED_NOTHING_SHIFT) & 1)
+#define EXTRACT_LINK_ERRORS(status) \
+(((status) & LINK_STAT_ERRORS) >> LINK_STAT_ERRORS_SHIFT)
 
 struct LinkStatus
 {
@@ -239,8 +242,8 @@ extern void (*gLinkCallback)(void);
 extern bool8 gShouldAdvanceLinkState;
 extern u16 gLinkTestBlockChecksums[MAX_LINK_PLAYERS];
 extern u8 gBlockRequestType;
-extern u8 gUnknown_03003160;
+extern u8 gLastSendQueueCount;
-extern u8 gUnknown_03004130;
+extern u8 gLastRecvQueueCount;
 extern u16 gUnknown_03004134;
 extern u32 gUnknown_03003074;
 extern u32 gFiller_03003154;

include/link_rfu.h

@@ -24,5 +24,6 @@ bool8 sub_8010500(void);
 bool8 Rfu_IsMaster(void);
 void task_add_05_task_del_08FA224_when_no_RfuFunc(void);
 void sub_8010434(void);
+void sub_800E604(void);
 
 #endif //GUARD_LINK_RFU_H

include/m4a.h

@@ -17,4 +17,8 @@ void m4aMPlayFadeOutTemporarily(struct MusicPlayerInfo *mplayInfo, u16 speed);
 void m4aMPlayFadeIn(struct MusicPlayerInfo *mplayInfo, u16 speed);
 void m4aMPlayImmInit(struct MusicPlayerInfo *mplayInfo);
 
+extern struct MusicPlayerInfo gMPlay_SE1;
+extern struct MusicPlayerInfo gMPlay_SE2;
+extern struct MusicPlayerInfo gMPlay_SE3;
+
 #endif //GUARD_M4A_H

include/malloc.h

@@ -1,6 +1,7 @@
 #ifndef GUARD_MALLOC_H
 #define GUARD_MALLOC_H
 
+#define HEAP_SIZE 0x1C000
 #define malloc Alloc
 #define calloc(ct, sz) AllocZeroed((ct) * (sz))
 #define free Free

include/new_menu_helpers.h

@@ -4,6 +4,8 @@
 #include "text.h"
 #include "task.h"
 
+extern const u16 gUnknown_0860F074[];
+
 void sub_81973A4(void);
 void sub_81973C4(u8, u8);
 void sub_819746C(u8 windowId, bool8 copyToVram);

src/link.c

@@ -1,6 +1,7 @@
 
 // Includes
 #include "global.h"
+#include "m4a.h"
 #include "malloc.h"
 #include "save.h"
 #include "bg.h"
@@ -15,6 +16,11 @@
 #include "gpu_regs.h"
 #include "palette.h"
 #include "task.h"
+#include "unknown_task.h"
+#include "menu.h"
+#include "new_menu_helpers.h"
+#include "text.h"
+#include "sound.h"
 #include "trade.h"
 #include "battle.h"
 #include "link_rfu.h"
@@ -90,9 +96,9 @@ u8 gBlockRequestType;
 u32 gFiller_03003154;
 u32 gFiller_03003158;
 u32 gFiller_0300315c;
-u8 gUnknown_03003160;
+u8 gLastSendQueueCount;
 struct Link gLink;
-u8 gUnknown_03004130;
+u8 gLastRecvQueueCount;
 u16 gUnknown_03004134;
 u32 gFiller_03004138;
 u32 gFiller_0300413C;
@@ -110,8 +116,10 @@ EWRAM_DATA struct LinkPlayer gLinkPlayers[MAX_RFU_PLAYERS] = {};
 EWRAM_DATA struct LinkPlayer gSavedLinkPlayers[MAX_RFU_PLAYERS] = {};
 EWRAM_DATA struct {
     u32 status;
-    u8 unk_04;
+    u8 lastRecvQueueCount;
-} gUnknown_02022B00 = {};
+    u8 lastSendQueueCount;
+    u8 unk_06;
+} sLinkErrorBuffer = {};
 EWRAM_DATA u16 gUnknown_02022B08 = 0;
 EWRAM_DATA void *gUnknown_02022B0C = NULL;
 
@@ -138,7 +146,8 @@ static void sub_800AD5C(void);
 static void sub_800AD88(void);
 static void sub_800AE30(void);
 static void sub_800AE5C(void);
-void sub_800AEB4(void);
+static void sub_800AEB4(void);
+void sub_800B1A0(void);
 u8 sub_800B2F8(void);
 void sub_800B4A4(void);
 void DisableSerial(void);
@@ -1243,8 +1252,8 @@ static void Task_PrintTestData(u8 taskId)
     LinkTest_prnthex(gLink.state, 2, 10, 2);
     LinkTest_prnthex(EXTRACT_PLAYER_COUNT(gLinkStatus), 15, 10, 2);
     LinkTest_prnthex(GetMultiplayerId(), 15, 12, 2);
-    LinkTest_prnthex(gUnknown_03003160, 25, 1, 2);
+    LinkTest_prnthex(gLastSendQueueCount, 25, 1, 2);
-    LinkTest_prnthex(gUnknown_03004130, 25, 2, 2);
+    LinkTest_prnthex(gLastRecvQueueCount, 25, 2, 2);
     LinkTest_prnthex(GetBlockReceivedStatus(), 15, 5, 2);
     LinkTest_prnthex(gLinkDebugSeed, 2, 12, 8);
     LinkTest_prnthex(gLinkDebugFlags, 2, 13, 8);
@@ -1436,7 +1445,7 @@ void sub_800AC34(void)
 
 static void sub_800AC80(void)
 {
-    if (gUnknown_03004130 == 0)
+    if (gLastRecvQueueCount == 0)
     {
         BuildSendCmd(0x5fff);
         gLinkCallback = sub_800ACAC;
@@ -1491,7 +1500,7 @@ void sub_800AD10(void)
 
 static void sub_800AD5C(void)
 {
-    if (gUnknown_03004130 == 0)
+    if (gLastRecvQueueCount == 0)
     {
         BuildSendCmd(0x5fff);
         gLinkCallback = sub_800AD88;
@@ -1545,7 +1554,7 @@ void sub_800ADF8(void)
 
 static void sub_800AE30(void)
 {
-    if (gUnknown_03004130 == 0)
+    if (gLastRecvQueueCount == 0)
     {
         BuildSendCmd(0x2ffe);
         gLinkCallback = sub_800AE5C;
@@ -1574,3 +1583,79 @@ static void sub_800AE5C(void)
         gLinkCallback = NULL;
     }
 }
+
+static void sub_800AEB4(void)
+{
+    if (gLinkOpen && EXTRACT_LINK_ERRORS(gLinkStatus))
+    {
+        if (!gSuppressLinkErrorMessage)
+        {
+            sLinkErrorBuffer.status = gLinkStatus;
+            sLinkErrorBuffer.lastRecvQueueCount = gLastRecvQueueCount;
+            sLinkErrorBuffer.lastSendQueueCount = gLastSendQueueCount;
+            SetMainCallback2(CB2_LinkError);
+        }
+        gLinkErrorOccurred = TRUE;
+        CloseLink();
+    }
+}
+
+void sub_800AF18(u32 status, u8 lastSendQueueCount, u8 lastRecvQueueCount, u8 unk_06)
+{
+    sLinkErrorBuffer.status = status;
+    sLinkErrorBuffer.lastSendQueueCount = lastSendQueueCount;
+    sLinkErrorBuffer.lastRecvQueueCount = lastRecvQueueCount;
+    sLinkErrorBuffer.unk_06 = unk_06;
+}
+
+void CB2_LinkError(void)
+{
+    u8 *tilemapBuffer;
+
+    SetGpuReg(REG_OFFSET_DISPCNT, 0);
+    m4aMPlayStop(&gMPlay_SE1);
+    m4aMPlayStop(&gMPlay_SE2);
+    m4aMPlayStop(&gMPlay_SE3);
+    InitHeap(gHeap, HEAP_SIZE);
+    ResetSpriteData();
+    FreeAllSpritePalettes();
+    ResetPaletteFadeControl();
+    FillPalette(0, 0, 2);
+    ResetTasks();
+    remove_some_task();
+    if (gSerialIsRFU)
+    {
+        if (!sLinkErrorBuffer.unk_06)
+        {
+            gSerialIsRFU = 3;
+        }
+        sub_800E604();
+    }
+    SetVBlankCallback(sub_80096BC);
+    ResetBgsAndClearDma3BusyFlags(0);
+    InitBgsFromTemplates(0, gUnknown_082ED1FC, 2);
+    gUnknown_02022B0C = tilemapBuffer = malloc(0x800);
+    SetBgTilemapBuffer(1, tilemapBuffer);
+    if (InitWindows(gUnknown_082ED204))
+    {
+        DeactivateAllTextPrinters();
+        reset_temp_tile_data_buffers();
+        SetGpuReg(REG_OFFSET_BLDCNT, 0);
+        SetGpuReg(REG_OFFSET_BLDALPHA, 0);
+        SetGpuReg(REG_OFFSET_BG0HOFS, 0);
+        SetGpuReg(REG_OFFSET_BG0VOFS, 0);
+        SetGpuReg(REG_OFFSET_BG1HOFS, 0);
+        SetGpuReg(REG_OFFSET_BG1VOFS, 0);
+        ClearGpuRegBits(REG_OFFSET_DISPCNT, DISPCNT_WIN0_ON | DISPCNT_WIN1_ON | DISPCNT_OBJWIN_ON);
+        LoadPalette(gUnknown_0860F074, 0xf0, 0x20);
+        gSoftResetDisabled = FALSE;
+        CreateTask(Task_DestroySelf, 0);
+        StopMapMusic();
+        gMain.callback1 = NULL;
+        RunTasks();
+        AnimateSprites();
+        BuildOamBuffer();
+        UpdatePaletteFade();
+        SetMainCallback2(sub_800B1A0);
+    }
+}