Decompile ereader.c up to faraway island code

include/ereader.h

@@ -0,0 +1,9 @@
+#ifndef GUARD_EREADER_H
+#define GUARD_EREADER_H
+
+bool32 sub_81D3B34(void);
+u32 sub_81D427C(void);
+bool8 sub_81D4A58(struct EventObject*);
+bool8 EventObjectIsFarawayIslandMew(struct EventObject *);
+
+#endif // GUARD_EREADER_H

include/pokenav.h

@@ -3,9 +3,6 @@
 #include "list_menu.h"
 
 bool8 sub_81D312C(void *arg0);
-bool8 sub_81D4A58(struct EventObject*);
-bool8 EventObjectIsFarawayIslandMew(struct EventObject *);
-u32 sub_81D427C(void);
 void sub_81D4998(void);
 void CB2_InitPokeNav(void);
 

ld_script.txt

@@ -291,7 +291,8 @@ SECTIONS {
         src/pokenav_match_call.o(.text);
         src/menu_specialized.o(.text);
         asm/menu_specialized.o(.text);
-        asm/rom_81D1C44.o(.text);
+        src/ereader.o(.text);
+        asm/ereader.o(.text);
         src/trainer_hill.o(.text);
         src/rayquaza_scene.o(.text);
         src/walda_phrase.o(.text);
@@ -596,7 +597,7 @@ SECTIONS {
         src/pokenav_match_call.o(.rodata);
         src/menu_specialized.o(.rodata);
         data/menu_specialized.o(.rodata);
-        data/rom_81D1C44.o(.rodata);
+        data/ereader.o(.rodata);
         src/trainer_hill.o(.rodata);
         src/rayquaza_scene.o(.rodata);
         src/walda_phrase.o(.rodata);

src/ereader.c

@@ -0,0 +1,564 @@
+#include "global.h"
+#include "alloc.h"
+#include "event_object_movement.h"
+#include "link.h"
+#include "save.h"
+#include "util.h"
+
+struct Unk81D38FC
+{
+    u8 unk0[0x270];
+    int checksum;
+};
+
+struct Unknown030012C8
+{
+    u8 unk0[8];
+    u32 *unk8;
+    int unkC;
+    int unk10;
+    int unk14;
+};
+
+void sub_81D41A0(void);
+static void sub_81D4170(void);
+int sub_81D3D70(u8, u32, u32*, u32*);
+void sub_81D41F4(void);
+static u16 sub_81D3EE8(u8);
+static void sub_81D413C(void);
+static void sub_81D414C(void);
+static void sub_81D3F1C(u32, u32*, u32*);
+static void sub_81D3F68(void);
+
+extern struct Unknown030012C8 gUnknown_030012C8;
+extern u16 gUnknown_030012E0;
+extern u16 gUnknown_030012E2;
+extern u16 gUnknown_030012E4;
+extern u16 gUnknown_030012E6;
+extern u32 gUnknown_030012E8;
+extern u16 gUnknown_030012EC;
+extern u16 gUnknown_030012EE;
+extern u16 gUnknown_030012F0;
+extern u16 gUnknown_030012F2;
+extern u16 gUnknown_030012F4;
+
+extern const u8 gUnknown_08625B6C[];
+
+static u8 sub_81D38D4(void)
+{
+    return (gSaveBlock1Ptr->trainerHill.unused + 1) % 256;
+}
+
+static bool32 sub_81D38FC(struct Unk81D38FC *arg0)
+{
+    int checksum = CalcByteArraySum(arg0->unk0, 0x270);
+    if (checksum != arg0->checksum)
+        return FALSE;
+
+    return TRUE;
+}
+
+bool8 sub_81D3920(u8 *buffer)
+{
+    u32 i;
+    u32 checksum;
+    int var0 = buffer[0];
+    if (var0 < 1 || var0 > 8)
+        return FALSE;
+
+    for (i = 0; i < var0; i++)
+    {
+        struct Unk81D38FC *var1 = (struct Unk81D38FC *)(&buffer[i * (sizeof(struct Unk81D38FC)) + 8]);
+        if (!sub_81D38FC(var1))
+            return FALSE;
+    }
+
+    checksum = CalcByteArraySum(buffer + 8, var0 * 0x274);
+    if (checksum != ((int *)buffer)[1])
+        return FALSE;
+
+    return TRUE;
+}
+
+static bool32 sub_81D396C(u8 *buffer)
+{
+    u32 checksum;
+    int var0 = buffer[0];
+    if (var0 < 1 || var0 > 8)
+        return FALSE;
+
+    checksum = CalcByteArraySum(buffer + 8, 0xEE0);
+    if (checksum != ((int *)buffer)[1])
+        return FALSE;
+
+    return TRUE;
+}
+
+static bool32 sub_81D3998(struct Unk81D38FC *arg0, u8 *buffer2)
+{
+    int i;
+    const u8 *ereaderVals;
+
+    memset(buffer2, 0, 0x1000);
+    buffer2[0] = arg0->unk0[0];
+    buffer2[1] = sub_81D38D4();
+    buffer2[2] = (arg0->unk0[0] + 1) / 2;
+
+    for (i = 0; i < arg0->unk0[0]; i++)
+    {
+        if (!(i & 1))
+        {
+            u8 *var0 = &buffer2[(i / 2) * 0x3B8];
+            u8 *var1 = arg0[i].unk0;
+            var0[8] = var1[8];
+            memcpy(&var0[0x29C], &var1[0x154], 0x124);
+            var0 += 0xC;
+            var1 += 0xC;
+            memcpy(var0, var1, 0x148);
+        }
+        else
+        {
+            u8 *var0 = &buffer2[(i / 2) * 0x3B8];
+            u8 *var1 = arg0[i].unk0;
+            var0[9] = var1[8];
+            memcpy(&var0[0x154], &var1[0xC], 0x148);
+        }
+    }
+
+    if (i & 1)
+    {
+        u8 *var0 = &buffer2[(i / 2) * 0x3B8];
+        var0 += 0x154;
+
+        ereaderVals = gUnknown_08625B6C;
+        memcpy(var0, &ereaderVals[(i / 2) * 0x148], 0x148);
+    }
+
+    ((int *)buffer2)[1] = CalcByteArraySum(buffer2 + 8, 0xEE0);
+    if (sub_8153634(SECTOR_ID_TRAINER_HILL, buffer2) != 1)
+        return FALSE;
+
+    return TRUE;
+}
+
+bool32 sub_81D3AB0(struct Unk81D38FC *arg0)
+{
+    u8 *var0 = AllocZeroed(0x1000);
+    bool32 result = sub_81D3998(arg0, var0);
+    Free(var0);
+    return result;
+}
+
+static bool32 sub_81D3AD8(u8 *arg0, u8 *arg1)
+{
+    if (TryCopySpecialSaveSection(SECTOR_ID_TRAINER_HILL, arg1) != 1)
+        return FALSE;
+
+    memcpy(arg0, arg1, 0xEE8);
+    if (!sub_81D396C(arg0))
+        return FALSE;
+
+    return TRUE;
+}
+
+static bool32 sub_81D3B0C(u8 *arg0)
+{
+    u8 *var0 = AllocZeroed(0x1000);
+    bool32 result = sub_81D3AD8(arg0, var0);
+    Free(var0);
+    return result;
+}
+
+bool32 sub_81D3B34(void)
+{
+    u8 *var0 = AllocZeroed(0x1000);
+    bool32 result = sub_81D3B0C(var0);
+    Free(var0);
+    return result;
+}
+
+static int unref_sub_81D3B54(int arg0, u32 *arg1)
+{
+    int result;
+    u16 var0;
+    int var1;
+
+    sub_81D41A0();
+    while (1)
+    {
+        sub_81D4170();
+        if (gUnknown_030012E2 & 2)
+            gShouldAdvanceLinkState = 2;
+
+        var1 = sub_81D3D70(1, arg0, arg1, NULL);
+        gUnknown_030012E4 = var1;
+        if ((gUnknown_030012E4 & 0x13) == 0x10)
+        {
+            result = 0;
+            break;
+        }
+
+        if (gUnknown_030012E4 & 0x8)
+        {
+            result = 1;
+            break;
+        }
+
+        var0 = gUnknown_030012E4 & 0x4;
+        if (var0)
+        {
+            result = 2;
+            break;
+        }
+
+        gShouldAdvanceLinkState = var0;
+        VBlankIntrWait();
+    }
+
+    CpuFill32(0, &gUnknown_030012C8, sizeof(struct Unknown030012C8));
+    sub_81D41F4();
+    return result;
+}
+
+static int unref_sub_81D3BE8(u32 *arg0)
+{
+    int result;
+    u16 var0;
+    int var1;
+
+    sub_81D41A0();
+    while (1)
+    {
+        sub_81D4170();
+        if (gUnknown_030012E2 & 2)
+            gShouldAdvanceLinkState = 2;
+
+        var1 = sub_81D3D70(0, 0, NULL, arg0);
+        gUnknown_030012E4 = var1;
+        if ((gUnknown_030012E4 & 0x13) == 0x10)
+        {
+            result = 0;
+            break;
+        }
+
+        if (gUnknown_030012E4 & 0x8)
+        {
+            result = 1;
+            break;
+        }
+
+        var0 = gUnknown_030012E4 & 0x4;
+        if (var0)
+        {
+            result = 2;
+            break;
+        }
+
+        gShouldAdvanceLinkState = var0;
+        VBlankIntrWait();
+    }
+
+    CpuFill32(0, &gUnknown_030012C8, sizeof(struct Unknown030012C8));
+    sub_81D41F4();
+    return result;
+}
+
+static void sub_81D3C7C(void)
+{
+    REG_IME = 0;
+    REG_IE &= ~(INTR_FLAG_TIMER3 | INTR_FLAG_SERIAL);
+    REG_IME = 1;
+    REG_SIOCNT = 0;
+    REG_TM3CNT_H = 0;
+    REG_IF = INTR_FLAG_TIMER3 | INTR_FLAG_SERIAL;
+}
+
+static void sub_81D3CBC(void)
+{
+    REG_IME = 0;
+    REG_IE &= ~(INTR_FLAG_TIMER3 | INTR_FLAG_SERIAL);
+    REG_IME = 1;
+    REG_RCNT = 0;
+    REG_SIOCNT = SIO_MULTI_MODE;
+    REG_SIOCNT |= SIO_INTR_ENABLE | SIO_115200_BPS;
+    REG_IME = 0;
+    REG_IE |= INTR_FLAG_SERIAL;
+    REG_IME = 1;
+
+    if (!gUnknown_030012C8.unk0[1])
+        CpuFill32(0, &gUnknown_030012C8, sizeof(struct Unknown030012C8));
+}
+
+static void sub_81D3D34(void)
+{
+    REG_RCNT = 0;
+    REG_SIOCNT = SIO_32BIT_MODE | SIO_INTR_ENABLE;
+    REG_SIOCNT |= SIO_MULTI_SD;
+    gShouldAdvanceLinkState = 0;
+    gUnknown_030012E6 = 0;
+    gUnknown_030012E8 = 0;
+}
+
+int sub_81D3D70(u8 arg0, u32 arg1, u32 *arg2, u32 *arg3)
+{
+    switch (gUnknown_030012C8.unk0[1])
+    {
+    case 0:
+        sub_81D3CBC();
+        gUnknown_030012C8.unk0[2] = 1;
+        gUnknown_030012C8.unk0[1] = 1;
+        break;
+    case 1:
+        if (sub_81D3EE8(arg0))
+            sub_81D413C();
+
+        if (gShouldAdvanceLinkState == 2)
+        {
+            gUnknown_030012C8.unk0[4] = 2;
+            gUnknown_030012C8.unk0[1] = 6;
+        }
+        break;
+    case 2:
+        sub_81D3D34();
+        sub_81D3F1C(arg1, arg2, arg3);
+        gUnknown_030012C8.unk0[1] = 3;
+        // fall through
+    case 3:
+        if (gShouldAdvanceLinkState == 2)
+        {
+            gUnknown_030012C8.unk0[4] = 2;
+            gUnknown_030012C8.unk0[1] = 6;
+        }
+        else
+        {
+            gUnknown_030012E6++;
+            gUnknown_030012E8++;
+            if (!gUnknown_030012C8.unk0[0] && gUnknown_030012E8 > 60)
+            {
+                gUnknown_030012C8.unk0[4] = 1;
+                gUnknown_030012C8.unk0[1] = 6;
+            }
+
+            if (gUnknown_030012C8.unk0[2] != 2)
+            {
+                if (gUnknown_030012C8.unk0[0] && gUnknown_030012E6 > 2)
+                {
+                    sub_81D413C();
+                    gUnknown_030012C8.unk0[2] = 2;
+                }
+                else
+                {
+                    sub_81D413C();
+                    gUnknown_030012C8.unk0[2] = 2;
+                }
+            }
+        }
+        break;
+    case 4:
+        sub_81D3CBC();
+        gUnknown_030012C8.unk0[1] = 5;
+        break;
+    case 5:
+        if (gUnknown_030012C8.unk0[0] == 1 && gUnknown_030012E6 > 2)
+            sub_81D413C();
+
+        if (++gUnknown_030012E6 > 60)
+        {
+            gUnknown_030012C8.unk0[4] = 1;
+            gUnknown_030012C8.unk0[1] = 6;
+        }
+        break;
+    case 6:
+        if (gUnknown_030012C8.unk0[2])
+        {
+            sub_81D3C7C();
+            gUnknown_030012C8.unk0[2] = 0;
+        }
+        break;
+    }
+
+    return gUnknown_030012C8.unk0[2] | (gUnknown_030012C8.unk0[4] << 2) | (gUnknown_030012C8.unk0[3] << 4);
+}
+
+static u16 sub_81D3EE8(u8 arg0)
+{
+    u16 terminal = (*(vu32 *)REG_ADDR_SIOCNT) & (SIO_MULTI_SI | SIO_MULTI_SD);
+    if (terminal == SIO_MULTI_SD && arg0)
+    {
+        gUnknown_030012C8.unk0[0] = 1;
+        return 1;
+    }
+    else
+    {
+        gUnknown_030012C8.unk0[0] = 0;
+        return 0;
+    }
+}
+
+static void sub_81D3F1C(u32 arg0, u32 *arg1, u32 *arg2)
+{
+    if (gUnknown_030012C8.unk0[0])
+    {
+        REG_SIOCNT |= SIO_38400_BPS;
+        gUnknown_030012C8.unk8 = arg1;
+        REG_SIODATA32 = arg0;
+        gUnknown_030012C8.unk10 = arg0 / 4 + 1;
+        sub_81D3F68();
+    }
+    else
+    {
+        REG_SIOCNT = REG_SIOCNT;
+        gUnknown_030012C8.unk8 = arg2;
+    }
+}
+
+static void sub_81D3F68(void)
+{
+    REG_TM3CNT_L = 0xFDA7;
+    REG_TM3CNT_H = TIMER_INTR_ENABLE;
+    REG_IME = 0;
+    REG_IE |= INTR_FLAG_TIMER3;
+    REG_IME = 1;
+}
+
+void sub_81D3F9C(void)
+{
+    sub_81D414C();
+    sub_81D413C();
+}
+
+void sub_81D3FAC(void)
+{
+    u16 i, playerCount, k;
+    u32 value;
+    u16 var0;
+    u16 recvBuffer[4];
+
+    switch (gUnknown_030012C8.unk0[1])
+    {
+    case 1:
+        REG_SIOMLT_SEND = 0xCCD0; // Handshake id
+        *(u64 *)recvBuffer = REG_SIOMLT_RECV;
+        for (i = 0, playerCount = 0, k = 0; i < 4; i++)
+        {
+            if (recvBuffer[i] == 0xCCD0)
+                playerCount++;
+            else if (recvBuffer[i] != 0xFFFF)
+                k++;
+        }
+
+        if (playerCount == 2 && k == 0)
+            gUnknown_030012C8.unk0[1] = 2;
+        break;
+    case 3:
+        value = REG_SIODATA32;
+        if (!gUnknown_030012C8.unkC && !gUnknown_030012C8.unk0[0])
+            gUnknown_030012C8.unk10 = value / 4 + 1;
+
+        if (gUnknown_030012C8.unk0[0] == 1)
+        {
+            if (gUnknown_030012C8.unkC < gUnknown_030012C8.unk10)
+            {
+                REG_SIODATA32 = gUnknown_030012C8.unk8[gUnknown_030012C8.unkC];
+                gUnknown_030012C8.unk14 += gUnknown_030012C8.unk8[gUnknown_030012C8.unkC];
+            }
+            else
+            {
+                REG_SIODATA32 = gUnknown_030012C8.unk14;
+            }
+        }
+        else
+        {
+            if (gUnknown_030012C8.unkC > 0 && gUnknown_030012C8.unkC < gUnknown_030012C8.unk10 + 1)
+            {
+                gUnknown_030012C8.unk8[gUnknown_030012C8.unkC - 1] = value;
+                gUnknown_030012C8.unk14 += value;
+            }
+            else if (gUnknown_030012C8.unkC)
+            {
+                if (gUnknown_030012C8.unk14 == value)
+                    gUnknown_030012C8.unk0[3] = 1;
+                else
+                    gUnknown_030012C8.unk0[3] = 2;
+            }
+
+            gUnknown_030012E8 = 0;
+        }
+
+        if (++gUnknown_030012C8.unkC < gUnknown_030012C8.unk10 + 2)
+        {
+            if (gUnknown_030012C8.unk0[0])
+                REG_TM3CNT_H |= TIMER_ENABLE;
+            else
+                sub_81D413C();
+        }
+        else
+        {
+            gUnknown_030012C8.unk0[1] = 4;
+            gUnknown_030012E6 = 0;
+        }
+        break;
+    case 5:
+        if (!gUnknown_030012C8.unk0[0])
+            REG_SIOMLT_SEND = gUnknown_030012C8.unk0[3];
+
+        *(u64 *)recvBuffer = REG_SIOMLT_RECV;
+        var0 = recvBuffer[1] - 1;
+        if (var0 < 2)
+        {
+            if (gUnknown_030012C8.unk0[0] == 1)
+                gUnknown_030012C8.unk0[3] = recvBuffer[1];
+
+            gUnknown_030012C8.unk0[1] = 6;
+        }
+        break;
+    }
+}
+
+static void sub_81D413C(void)
+{
+    REG_SIOCNT |= SIO_ENABLE;
+}
+
+static void sub_81D414C(void)
+{
+    REG_TM3CNT_H &= ~TIMER_ENABLE;
+    REG_TM3CNT_L = 0xFDA7;
+}
+
+static void sub_81D4170(void)
+{
+    int keysMask = REG_KEYINPUT ^ KEYS_MASK;
+    gUnknown_030012E2 = keysMask & ~gUnknown_030012E0;
+    gUnknown_030012E0 = keysMask;
+}
+
+void sub_81D41A0(void)
+{
+    gUnknown_030012EC = REG_IME;
+    gUnknown_030012EE = REG_IE;
+    gUnknown_030012F0 = REG_TM3CNT_H;
+    gUnknown_030012F2 = REG_SIOCNT;
+    gUnknown_030012F4 = REG_RCNT;
+}
+
+void sub_81D41F4(void)
+{
+    REG_IME = gUnknown_030012EC;
+    REG_IE = gUnknown_030012EE;
+    REG_TM3CNT_H = gUnknown_030012F0;
+    REG_SIOCNT = gUnknown_030012F2;
+    REG_RCNT = gUnknown_030012F4;
+}
+
+void sub_81D4238(void)
+{
+    CpuFill32(0, &gUnknown_030012C8, sizeof(struct Unknown030012C8));
+}
+
+u8 sub_81D4258(void)
+{
+    u8 eventObjectId;
+    TryGetEventObjectIdByLocalIdAndMap(1, gSaveBlock1Ptr->location.mapNum, gSaveBlock1Ptr->location.mapGroup, &eventObjectId);
+    return eventObjectId;
+}

src/event_object_movement.c

@@ -3,6 +3,7 @@
 #include "battle_pyramid.h"
 #include "berry.h"
 #include "decoration.h"
+#include "ereader.h"
 #include "event_data.h"
 #include "event_object_movement.h"
 #include "event_scripts.h"
@@ -15,7 +16,6 @@
 #include "metatile_behavior.h"
 #include "overworld.h"
 #include "palette.h"
-#include "pokenav.h"
 #include "random.h"
 #include "sprite.h"
 #include "task.h"

src/trainer_hill.c

@@ -3,6 +3,7 @@
 #include "battle.h"
 #include "battle_tower.h"
 #include "battle_setup.h"
+#include "ereader.h"
 #include "event_data.h"
 #include "event_scripts.h"
 #include "fieldmap.h"
@@ -32,8 +33,6 @@
 #include "constants/easy_chat.h"
 #include "constants/trainer_hill.h"
 
-extern bool32 sub_81D3B34(void);
-
 #define HILL_TAG_NORMAL 0
 #define HILL_TAG_VARIETY 1
 #define HILL_TAG_UNIQUE 2