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|
#include "global.h"
#include "main.h"
#include "gbplayer.h"
#include "m4a.h"
static void InitGame(void);
static void sub_B8C(void);
static void InitIntrHandlers(void);
static void ReadKeys(void);
void AgbMain(void)
{
RegisterRamReset(0xFF);
InitIntrHandlers();
DmaCopy32(3, IntrMain, IntrMain_Buffer, sizeof(IntrMain_Buffer));
INTR_VECTOR = IntrMain_Buffer;
InitGame();
InitGameBoyPlayer();
while (1)
{
ReadKeys();
gMainFuncs[gMain.mainState]();
MainLoopIter();
}
}
void sub_9BC_Main(void)
{
switch (gMain.subState)
{
case 0:
sub_CBC();
sub_24C();
gMain.subState++;
break;
case 1:
if (gMain.newKeys & KEYS_MASK)
gMain.subState = 2;
break;
default:
sub_2B4();
sub_D10();
SetMainGameState(STATE_TITLE);
break;
}
}
void VBlankIntr(void)
{
m4aSoundVSync();
INTR_CHECK |= INTR_FLAG_VBLANK;
}
void VCountIntr(void)
{
INTR_CHECK |= INTR_FLAG_VCOUNT;
while (!(REG_DISPSTAT & DISPSTAT_HBLANK));
if (gMain.mainState == STATE_GAME_MAIN)
{
REG_BG0HOFS = 0;
if (gMain.unk28)
{
if (gMain.vCount == 72)
{
REG_BG0VOFS = gMain.unk2A * 4 + 88;
gMain.vCount = 144;
REG_DISPSTAT &= 0xFF;
REG_DISPSTAT |= (gMain.vCount << 8) + DISPSTAT_VCOUNT_INTR;
}
else
{
REG_BG0VOFS = 352;
gMain.vCount = 72;
REG_DISPSTAT &= 0xFF;
REG_DISPSTAT |= (gMain.vCount << 8) + DISPSTAT_VCOUNT_INTR;
}
}
else if (gMain.unk2C)
{
if (gMain.vCount == 40)
{
gMain.blendControl = BLDCNT_TGT2_OBJ | BLDCNT_TGT2_BG1 | BLDCNT_TGT2_BG2 | BLDCNT_TGT2_BG3
| BLDCNT_EFFECT_BLEND | BLDCNT_TGT1_BG0;
gMain.blendAlpha = 0xA06;
REG_BLDCNT = gMain.blendControl;
REG_BLDALPHA = gMain.blendAlpha;
gMain.vCount = 144;
REG_DISPSTAT &= 0xFF;
REG_DISPSTAT |= (gMain.vCount << 8) + DISPSTAT_VCOUNT_INTR;
}
else
{
gMain.blendControl = BLDCNT_TGT2_OBJ | BLDCNT_TGT2_BG1 | BLDCNT_TGT2_BG2 | BLDCNT_TGT2_BG3
| BLDCNT_EFFECT_NONE | BLDCNT_TGT1_BG0;
gMain.blendAlpha = 0;
REG_BLDCNT = gMain.blendControl;
REG_BLDALPHA = gMain.blendAlpha;
REG_BG0VOFS = 352;
gMain.vCount = 40;
REG_DISPSTAT &= 0xFF;
REG_DISPSTAT |= (gMain.vCount << 8) + DISPSTAT_VCOUNT_INTR;
}
}
else
{
REG_BG0VOFS = 352;
}
}
}
void SerialIntr(void)
{
sub_1F5C();
}
void Timer3Intr(void)
{
sub_1F4C();
}
void IntrDummy(void)
{
}
static void InitGame(void)
{
REG_WAITCNT = WAITCNT_AGB
| WAITCNT_PREFETCH_ENABLE
| WAITCNT_PHI_OUT_NONE
| WAITCNT_WS2_S_1
| WAITCNT_WS2_N_3
| WAITCNT_WS1_S_1
| WAITCNT_WS1_N_3
| WAITCNT_WS0_S_1
| WAITCNT_WS0_N_3
| WAITCNT_SRAM_2;
REG_IE = INTR_FLAG_GAMEPAK;
REG_IME = INTR_FLAG_VBLANK;
sub_B8C();
m4aSoundInit();
m4aSoundVSyncOff();
SaveFile_LoadGameData();
}
static void sub_B8C(void)
{
gMain.mainState = STATE_INTRO;
gMain.subState = 0;
gMain.unk16 = 0;
gMain.heldKeys = 0;
gMain.newKeys = 0;
gMain.unk20 = 0;
gMain.rngValue = 0;
gMain.frameCount = 0;
gMain.unk30 = 0;
gMain.vCount = 144;
gMain.unk2C = 0;
ClearSomeArray();
ResetSomeGraphicsRelatedStuff();
}
static void InitIntrHandlers(void)
{
int i;
for (i = 0; i < INTR_COUNT; i++)
gIntrTable[i] = gIntrTableTemplate[i];
gVBlankIntrFuncPtr = &gIntrTable[2];
gVCountIntrFuncPtr = &gIntrTable[4];
ResetMainCallback();
ResetVBlankIntrFunc();
ResetVCountIntrFunc();
}
// The number 1103515245 comes from the example implementation of rand and srand
// in the ISO C standard.
u32 Random(void)
{
gMain.rngValue = 1103515245 * gMain.rngValue + 12345;
return gMain.rngValue & 0xFFFF;
}
#ifdef NONMATCHING
s16 sub_C24(u16 arg0)
{
u16 index = arg0 / 4;
s16 var0 = 1;
if (index > 0x1FFF)
{
index -= 0x2000;
var0 = -1;
}
if (index > 0xFFF)
index = 0x2000 - index;
return gUnknown_08055C44[index] * var0;
}
#else
NAKED
s16 sub_C24(u16 arg0)
{
asm_unified("\n\
lsls r0, r0, #0x10\n\
lsrs r2, r0, #0x12\n\
movs r3, #1\n\
ldr r0, _08000C60 @ =0x00001FFF\n\
cmp r2, r0\n\
bls _08000C3A\n\
ldr r1, _08000C64 @ =0xFFFFE000\n\
adds r0, r2, r1\n\
lsls r0, r0, #0x10\n\
lsrs r2, r0, #0x10\n\
ldr r3, _08000C68 @ =0x0000FFFF\n\
_08000C3A:\n\
ldr r0, _08000C6C @ =0x00000FFF\n\
cmp r2, r0\n\
bls _08000C4C\n\
movs r1, #0x80\n\
lsls r1, r1, #6\n\
adds r0, r1, #0\n\
subs r0, r0, r2\n\
lsls r0, r0, #0x10\n\
lsrs r2, r0, #0x10\n\
_08000C4C:\n\
ldr r1, _08000C70 @ =0x08055C44\n\
lsls r0, r2, #1\n\
adds r0, r0, r1\n\
ldrh r1, [r0]\n\
lsls r0, r3, #0x10\n\
asrs r0, r0, #0x10\n\
muls r0, r1, r0\n\
lsls r0, r0, #0x10\n\
asrs r0, r0, #0x10\n\
bx lr\n\
.align 2, 0\n\
_08000C60: .4byte 0x00001FFF\n\
_08000C64: .4byte 0xFFFFE000\n\
_08000C68: .4byte 0x0000FFFF\n\
_08000C6C: .4byte 0x00000FFF\n\
_08000C70: .4byte 0x08055C44");
}
#endif // NONMATCHING
s16 sub_C74(u16 arg0)
{
return sub_C24(arg0 + 0x4000);
}
static void ReadKeys(void)
{
u16 keyInput = ~REG_KEYINPUT;
gMain.newKeys = keyInput & (keyInput ^ gMain.heldKeys);
gMain.releasedKeys = gMain.heldKeys & (keyInput ^ gMain.heldKeys);
gMain.heldKeys = keyInput;
}
void sub_CBC(void)
{
if (!(REG_IE & INTR_FLAG_VBLANK))
{
REG_IF |= INTR_FLAG_VCOUNT | INTR_FLAG_VBLANK;
REG_IE &= INTR_FLAG_VBLANK
| INTR_FLAG_HBLANK
| INTR_FLAG_VCOUNT
| INTR_FLAG_TIMER0
| INTR_FLAG_TIMER1
| INTR_FLAG_TIMER2
| INTR_FLAG_TIMER3
| INTR_FLAG_SERIAL
| INTR_FLAG_DMA0
| INTR_FLAG_DMA1
| INTR_FLAG_DMA2
| INTR_FLAG_DMA3
| INTR_FLAG_KEYPAD
| INTR_FLAG_GAMEPAK;
REG_IME = INTR_FLAG_VBLANK;
REG_IE |= INTR_FLAG_VCOUNT | INTR_FLAG_VBLANK;
REG_DISPSTAT |= DISPSTAT_VBLANK_INTR;
m4aSoundVSyncOn();
}
}
void sub_D10(void)
{
REG_DISPSTAT &= ~DISPSTAT_VBLANK_INTR;
REG_DISPSTAT &= ~DISPSTAT_VCOUNT_INTR;
REG_IE &= INTR_FLAG_VBLANK
| INTR_FLAG_HBLANK
| INTR_FLAG_VCOUNT
| INTR_FLAG_TIMER0
| INTR_FLAG_TIMER1
| INTR_FLAG_TIMER2
| INTR_FLAG_TIMER3
| INTR_FLAG_SERIAL
| INTR_FLAG_DMA0
| INTR_FLAG_DMA1
| INTR_FLAG_DMA2
| INTR_FLAG_DMA3
| INTR_FLAG_KEYPAD
| INTR_FLAG_GAMEPAK;
REG_IE &= INTR_FLAG_HBLANK
| INTR_FLAG_VCOUNT
| INTR_FLAG_TIMER0
| INTR_FLAG_TIMER1
| INTR_FLAG_TIMER2
| INTR_FLAG_TIMER3
| INTR_FLAG_SERIAL
| INTR_FLAG_DMA0
| INTR_FLAG_DMA1
| INTR_FLAG_DMA2
| INTR_FLAG_DMA3
| INTR_FLAG_KEYPAD
| INTR_FLAG_GAMEPAK;
if (!REG_IE)
REG_IME = 0;
REG_IF |= INTR_FLAG_VBLANK;
m4aSoundVSyncOff();
}
void MainLoopIter(void)
{
gMainCallback = gUnknown_02017BD4;
*gVBlankIntrFuncPtr = gUnknown_02017BD0;
*gVCountIntrFuncPtr = gUnknown_0200FBA0;
if (gMainCallback)
gMainCallback();
gMain.frameCount++;
}
void DefaultMainCallback(void)
{
if (REG_DISPSTAT & DISPSTAT_VBLANK_INTR)
{
VBlankIntrWait();
DmaCopy32(3, gOamBuffer, (void *)OAM, OAM_SIZE);
REG_DISPCNT = gMain.unk16;
REG_BG0HOFS = gMain.unk2E8[0].unk0;
REG_BG0VOFS = gMain.unk2E8[0].unk2;
REG_BG1HOFS = gMain.unk2E8[1].unk0;
REG_BG1VOFS = gMain.unk2E8[1].unk2;
REG_BG2HOFS = gMain.unk2E8[2].unk0;
REG_BG2VOFS = gMain.unk2E8[2].unk2;
REG_BG3HOFS = gMain.unk2E8[3].unk0;
REG_BG3VOFS = gMain.unk2E8[3].unk2;
if (gMain.unk36)
{
REG_BLDCNT = gMain.blendControl;
REG_BLDALPHA = gMain.blendAlpha;
REG_BLDY = gMain.blendBrightness;
}
REG_DISPSTAT &= 0xFF;
REG_DISPSTAT |= (gMain.vCount << 8) + DISPSTAT_VCOUNT_INTR;
m4aSoundMain();
}
}
|
