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#include "global.h"
#include "crt0.h"
#include "random.h"
#include "flash.h"
#include "text.h"
extern char ewram_start[];
typedef void (*IntrCallback)(void);
EWRAM_DATA u8 IntrMain_Buffer[0x120];
EWRAM_DATA IntrCallback gIntrTable[6];
EWRAM_DATA IntrCallback gIntrCallbacks[6];
extern u16 gBldCnt;
extern u8 gUnknown_202D7FE;
extern u8 gInterruptsEnabled;
extern u16 gUnknown_203B0AC;
extern s16 gUnknown_203B0AE;
extern char alt_203B038[];
extern char gTitlePaletteFile[];
extern char gUnknown_203BC04[];
extern char iwram_start[];
extern char alt_3001B58[];
extern char unk_code_ram[];
extern char unk_code_ram_end[];
extern u8 gUnknown_80B9BF1[];
extern IntrCallback gInitialIntrTable[6];
extern char gUnknown_8270000[];
extern char unk_code[];
extern void sub_800CDA8(int);
extern void sub_800B540(void);
extern void InitSprites(void);
extern void nullsub_9(void);
extern void nullsub_6(void);
extern void InitInput(void);
extern void InitBGPaletteBuffer(void);
extern void sub_80057E8(void);
extern void InitFileSystem(void);
extern void sub_80098A0(void);
extern void InitGraphics(void);
extern void GameLoop(void);
extern void Hang(void);
extern void VBlank_CB(void);
extern void nullsub_17(void);
extern void InitMusic(void); // music initializer
extern void sub_800D6AC(void);
extern void sub_800D7D0(void);
bool8 EnableInterrupts(void);
void InitIntrTable(const IntrCallback *interrupt_table);
IntrCallback SetInterruptCallback(u32 index, IntrCallback new_callback);
void AgbMain(void)
{
u8 value[4];
u8 seed[6];
REG_WAITCNT = WAITCNT_PREFETCH_ENABLE | WAITCNT_WS0_S_1 | WAITCNT_WS0_N_3;
DmaStop(0);
DmaStop(1);
DmaStop(2);
DmaStop(3);
if (gUnknown_203BC04 - gTitlePaletteFile > 0)
CpuCopy32(gUnknown_8270000, gTitlePaletteFile, gUnknown_203BC04 - gTitlePaletteFile);
if (alt_203B038 - ewram_start > 0)
{
memset(value, 0, 4);
CpuSet(&value, ewram_start, CPU_SET_SRC_FIXED | CPU_SET_32BIT | (((alt_203B038 - ewram_start) / 4) & 0x1FFFFF));
}
if (unk_code_ram_end - unk_code_ram > 0)
CpuCopy32(unk_code, unk_code_ram, unk_code_ram_end - unk_code_ram);
if (alt_3001B58 - iwram_start > 0)
{
memset(value, 0, 4);
CpuSet(&value, iwram_start, CPU_SET_SRC_FIXED | CPU_SET_32BIT | (((alt_3001B58 - iwram_start) / 4) & 0x1FFFFF));
}
REG_WIN0H = 0;
REG_WIN1H = 0;
REG_WIN0V = 0;
REG_WIN1V = 0;
REG_WININ = WININ_WIN0_ALL | WININ_WIN1_ALL; // 16191
REG_WINOUT = WINOUT_WIN01_BG0 | WINOUT_WIN01_BG2 | WINOUT_WIN01_BG3 | WINOUT_WIN01_OBJ | WINOUT_WIN01_CLR; // 61
gBldCnt = REG_BLDCNT = BLDCNT_TGT1_BG1 | BLDCNT_EFFECT_BLEND | BLDCNT_TGT2_BG2 | BLDCNT_TGT2_BG3 | BLDCNT_TGT2_BD | BLDCNT_TGT2_OBJ; // 15426
REG_BLDALPHA = BLDALPHA_BLEND(10, 6); // 1546
gUnknown_202D7FE = 0;
REG_BG0CNT = BGCNT_PRIORITY(0) | BGCNT_CHARBASE(0) | BGCNT_WRAP | BGCNT_SCREENBASE(12); // 11264
REG_BG1CNT = BGCNT_PRIORITY(1) | BGCNT_CHARBASE(0) | BGCNT_WRAP | BGCNT_SCREENBASE(13); // 11521
REG_BG2CNT = BGCNT_PRIORITY(2) | BGCNT_CHARBASE(2) | BGCNT_WRAP | BGCNT_SCREENBASE(14); // 11786
REG_BG3CNT = BGCNT_PRIORITY(3) | BGCNT_CHARBASE(2) | BGCNT_WRAP | BGCNT_SCREENBASE(15); // 12043
REG_DISPCNT = DISPCNT_WIN1_ON | DISPCNT_WIN0_ON | DISPCNT_OBJ_ON | DISPCNT_BG_ALL_ON | DISPCNT_OBJ_1D_MAP | DISPCNT_FORCED_BLANK; // 32704
sub_800CDA8(1);
sub_800B540();
InitFlash();
memcpy(seed, gUnknown_80B9BF1, 6);
SeedRng(seed);
InitSprites();
nullsub_9();
nullsub_6();
InitInput();
InitBGPaletteBuffer();
sub_80057E8();
InitFileSystem();
LoadCharmaps();
sub_80098A0();
InitGraphics();
SetInterruptCallback(1, (IntrCallback)VBlank_CB);
REG_DISPCNT = DISPCNT_WIN1_ON | DISPCNT_WIN0_ON | DISPCNT_OBJ_ON | DISPCNT_BG_ALL_ON | DISPCNT_OBJ_1D_MAP; // 32576
GameLoop();
Hang();
}
void sub_800B540(void)
{
s32 i;
for (i = 0; i < 6; i++) {
gIntrCallbacks[i] = NULL;
}
nullsub_17();
InitMusic(); // initialize music and stop DMAs
while(REG_VCOUNT < 160){}
REG_IE ^= INTR_FLAG_TIMER3 | INTR_FLAG_VBLANK | INTR_FLAG_VCOUNT; // 0x45
*(u8*)®_DISPCNT |= DISPCNT_FORCED_BLANK;
InitIntrTable(gInitialIntrTable); // set up intrrupt vector/table
REG_TM3CNT = (TIMER_64CLK | TIMER_INTR_ENABLE | TIMER_ENABLE) << 16;
REG_IE |= INTR_FLAG_GAMEPAK | INTR_FLAG_TIMER3 | INTR_FLAG_VCOUNT | INTR_FLAG_VBLANK; // 0x2045
REG_DISPSTAT = DISPSTAT_VCOUNT_INTR | DISPSTAT_VBLANK_INTR;
gUnknown_203B0AE = -1;
gUnknown_203B0AC = 0;
sub_800D6AC(); // Some other IO REG update func
sub_800D7D0(); // Some other IO REG update func
gInterruptsEnabled = 1;
EnableInterrupts();
while(REG_VCOUNT < 160){}
}
bool8 EnableInterrupts(void)
{
if(!gInterruptsEnabled)
{
return FALSE;
}
if(REG_IME & 1)
{
return FALSE;
}
else
{
REG_IME = 1;
return TRUE;
}
}
bool8 DisableInterrupts(void)
{
if(!gInterruptsEnabled)
{
return FALSE;
}
if(!(REG_IME & 1))
{
return FALSE;
}
else
{
REG_IME = 0;
return TRUE;
}
}
bool8 sub_800B650(void)
{
if(!gInterruptsEnabled)
{
return FALSE;
}
if(REG_IME & 1)
{
return FALSE;
}
else
{
return TRUE;
}
}
void AckInterrupt(u16 flag)
{
if(!gInterruptsEnabled)
{
return;
}
REG_IME = 0;
INTR_CHECK |= flag;
REG_IME = 1;
}
void InitIntrTable(const IntrCallback *interrupt_table)
{
CpuCopy32(interrupt_table, gIntrTable, sizeof(gIntrTable)); // 0x18 = 0x6 * 4 (0x4f00 is 32 bits)
CpuCopy32(IntrMain, IntrMain_Buffer, sizeof(IntrMain_Buffer)); // 0x120 = 0x48 * 4 (0x4f00 is 32 bits)
INTR_VECTOR = IntrMain_Buffer;
}
IntrCallback *GetInterruptHandler(u32 index)
{
return &gIntrTable[index];
}
IntrCallback SetInterruptCallback(u32 index, IntrCallback new_callback)
{
IntrCallback old_callback;
u32 interrupt_var;
interrupt_var = DisableInterrupts();
old_callback = gIntrCallbacks[index];
gIntrCallbacks[index] = new_callback;
if(interrupt_var){
EnableInterrupts();
}
return old_callback;
}
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