pureikyubu/Docs/RE/zelda.txt

// some reversing of Legend of Zelda: The Wind Waker
// made by org <ogamespec@gmail.com>
// many thanks to Nintendo for Zelda MAP file !!

void main()
{
    u32*        stackBase = ??;     // some weird stack manipulations on ASM
                                    // complicated and dont care
    OSThread*   curThread = OSGetCurrentThread();

    mDoMain.sPowerOnTime = OSGetTime();

    // not interesting stuff
    OSReportInit();                 // set flag
    version_check();                // halt if not good (never happen)

    // allocate reset data buffer
    if( (mDoRst.mResetData == (u32 *)OSAllocFromArenaLo(16, 4))
        == NULL) while(1);          // halt, if failed

    // clear some reset data
    if(OSGetResetCode() == 0)
    {
        mDoRst.mResetData[0] = 0;
        mDoRst.mResetData[1] = 0;
        mDoRst.mResetData[1] = 0;   // why twice ? maybe typo..
        mDoRst.mResetData[2] = 0;
        mDoRst.mResetData[3] =-1;
    }

    // g_dComIfG_gameInfo is huge buffer, based on #define access
    // each entry meaning some item, or stuff, not really sure
    ct__13dComIfG_inf(g_dComIfG_gameInfo);

    // switch between development modes
    if(mDoMain.developmentMode < 0)         // currently its 0
    {
        DVDDiskID *id = DVDGetCurrentDiskID();

        if(id->gameVersion > 0x90)          // always enabled
        {
            mDoMain.developmentMode = 1;
        }
        else if(id->gameVersion > 0x80)     // depends on console type
        {
            mDoMain.developmentMode = (OSGetConsoleType() >> 28) & 1;
        }
        else mDoMain.developmentMode = 0;   // always disabled
    }

    // startup main thread
    OSCreateThread(
        &mainThread,
        main01,
        NULL,
        stackBase,
        0x1f000,
        OSGetThreadPriority(curThread),
        0           // stay in thread's list (rejoinable)
    );
    OSResumeThread(&mainThread);
    
    // deactivate current thread
    OSSetThreadPriority(curThread, 31); // lowest
    OSSuspendThread(curThread);

    // main thread starts to execute after next retrace
}

// Zelda has its own report routines
// and seems its not using usual OSReport
void OSReportInit()
{
    if(print_initialized) return;
    else print_initialized = 1;
}

void version_check()
{
    if(
        strcmp("05Sep2002", "05Sep2002") ||
        strcmp(NULL, NULL)               )
    {
        // actually this will never happen
        OSReport_Error("SDK" "and Something on Japaneese ?");
        while(1);   // halt
    }
}

// crazy constructors things, and not interesting 
// whats "ComIfG" ? Common Info Game ?
ct__13dComIfG_inf(r3)
{
    *r3+?? = 255;
    ct_14dComIfG_play_cFv(r3+4768);
}

// ---------------------------------------------------------------------------

void main01(void)
{
    mDoMch_Create();        // memory, heaps, tables etc
    mDoGph_Create();        // graphics
    mDoCPd_Create();        // controllers

    RootHeapCheck[1]   = JKRHeap.sRootHeap;
    SystemHeapCheck[1] = JKRHeap.sSystemHeap;
    ZeldaHeapCheck[1]  = mDoExt_getZeldaHeap();
    GameHeapCheck[1]   = mDoExt_getGameHeap();
    ArchiveHeapCheck[1]= mDoExt_getArchiveHeap();
    CommandHeapCheck[1]= mDoExt_getCommandHeap();

    JFWSystem.systemConsole[22] = (mDoMain.developmentMode == 0) ? 0 : 3;
    JFWSystem.systemConsole[16] = 32;
    JFWSystem.systemConsole[17] = 42;

    mDoDvdThd.create(LOAD_COPYDATE, NULL);

    fapGm_Create();

    mDisplayHeapSize = 0;

    cDyl_InitAsync();

    g_mDoAud_audioHeap = JKRSolidHeap.create( 0x166800, 
                                              JKRHeap.sCurrentHeap, 
                                              0);
    
    // game loop
    while(1)
    {
        // increase frame counter
        frame++;

        if(fillcheck_check_frame)
        {
            if(frame % fillcheck_check_frame)
            {
                mDoMch_HeapCheckAll();
            }
        }

        if(mDoDvdThd.SyncWidthSound)
        {
            mDoMemCd_Ctrl.update(g_mDoMemCd_control);
        }

        mDoCPd_Read();
        mDoAud_Execute();
        fapGm_Execute();
        debug();
    }
}

BOOL mDoMch_Create(void)
{
    if((OSGetConsoleType() & OS_CONSOLE_RETAIL3) || (mDoMain.developmentMode == 0))
    {
        OSReportDisable();
    }

    JKRHeap.sDefaultFillFlag = mDoMch.mDebugFill - 1;

    if(JFWSystem.sInitCalled)
    {
        // guess it same as :
        // JUTASSERTMSG("sInitCalled == 0");

        JUTAssertion.showAssert(
            JUTAssertion.getSDevice(),
            "JFWSystem.h", 47,
            "sInitCalled == 0"
        );
        OSPanic(
            "JFWSystem.h", 47,
            "sInitCalled == 0"
        );
    }

    JFWSystem.CSetUpParam.maxStdHeaps = 1;

    // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    u32 arenaHi = OSGetArenaHi();
    u32 arenaLo = OSGetArenaLo();

    if(arenaHi > 0x81800000)
    {
        u32 upperArenaHi = arenaHi - 0x81800000;
        if(upperArenaHi > arenaLo)
        {
            OSSetArenaHi(upperArenaHi);
        }
    }

    u32 heapSize = OSGetArenaHi() - OSGetArenaLo() - 240;
    if(OSGetConsoleSimulatedMemSize() > 48 MB)
    {
        heapSize -= 16 MB;
    }

    // mDoMain.memMargin = -1 on startup
    if((mDoMain.memMargin + 65536) == 65535)
    {
        heapSize += mDoMain.memMargin;
    }

    if(JFWSystem.sInitCalled) JUTASSERTMSG("sInitCalled == 0");

    // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    JFWSystem.CSetUpParam.sysHeapSize = heapSize - 12 MB - 3072;
    if(JFWSystem.sInitCalled) JUTASSERTMSG("sInitCalled == 0");

    JFWSystem.CSetUpParam.fifoBufSize = 640*1024;           // 640 kb
    if(JFWSystem.sInitCalled) JUTASSERTMSG("sInitCalled == 0");

    JFWSystem.CSetUpParam.aramAudioBufSize = 10*1024*1024;  // 10 mb
    if(JFWSystem.sInitCalled) JUTASSERTMSG("sInitCalled == 0");

    JFWSystem.CSetUpParam.aramGraphBufSize = 5944*1024      // 5.8 mb
    GXRenderModeObj *rm = mDoMch.mRenderModeObj;
    if(JFWSystem.sInitCalled) JUTASSERTMSG("sInitCalled == 0");

    JFWSystem.CSetUpParam.renderMode = rm;
    JFWSystem.init();

    if(mDoMain.developmentMode == 0)
    {
        JUTAssertion.setVisible(FALSE);
    }

    JUTDbPrint.sDebugPrint[12] = 0;

    JKRHeap.setErrorHandler(myMemoryErrorRoutine);
    JKRHeap.setErrorFlag(JKRHeap.sRootHeap, TRUE);
    JKRHeap.setErrorFlag(JFWSystem.systemHeap, TRUE);

    mDoExt_createCommandHeap(4096, JKRHeap.sRootHeap);
    mDoExt_createArchiveHeap(10565*1024, JKRHeap.sRootHeap);
    mDoExt_createGameHeap(2938*1024, JKRHeap.sRootHeap);

    u32 freeSize = JKRHeap.getFreeSize(JKRHeap.sSystemHeap) - 65536;
    if(freeSize <= 0) JUTASSERTMSG("Halt");

    JKRHeap.becomeCurrentHeap(
        mDoExt_createZeldaHeap(freeSize, JKRHeap.sSystemHeap);
    );

    JKRAramStream.setTransBuffer(0, 8*1024, JKRHeap.sSystemHeap);
    JKRAram.sSzpBufferSize          = 
    JKRDvdAramRipper.sSzpBufferSize = 
    JKRDvdRipper.sSzpBufferSize     = 8*1024;

    JKRThreadSwitch.createManager(0);

    void *ptr = __nw(104);      // probably "new" operator
    if(ptr)
    {
        __ct__9JKRThreadFP(
            ptr, 
            OSGetCurrentThread(),
            0
        );
    }

    JFWSystem.systemConsole[22] = 3;
    JFWSystem.systemConsole[16] = 16;
    JFWSystem.systemConsole[17] = 42;

    JUTException.appendMapFile("/maps/framework.map");
    JUTException.setPreUserCallback(myExceptionCallback);
    JUTException.setPostUserCallback(fault_callback_scroll);

    // C math init
    JMANewSinTable(12);
    cM.init(mDoExt_getZeldaHeap());
    cM_initRnd(100, 100, 100);

    mDoDvdThd.create(OSGetThreadPriority(OSGetCurrentThread()) - 2);
    mDoDvdErr_ThdInit();

    mDoMemCd_Ctrl.ThdInit(g_mDoMemCd_control);

    return TRUE;
}

BOOL mDoGph_Create(void)
{
    JKRSolidHeap *heap = mDoExt_createSolidHeapToCurrent(0, 0, 0);

    mDoGph_gInf.create();
    dDlist_list.init(&g_dComIfG_gameInfo[23836]);

    mDoExt_restoreCurrentHeap(mDoExt_adjustSolidHeap(heap));

    JFWAutoAbortGfx = mDoMain.developmentMode - 1 + 1; // ?

    return TRUE;
}