diff options
Diffstat (limited to 'src/main.c')
| -rwxr-xr-x | src/main.c | 289 |
1 files changed, 285 insertions, 4 deletions
@@ -2,20 +2,43 @@ #include "m4a.h" #include "main.h" +extern void sub_438(void); +extern void sub_8BC(void); +extern void sub_8FC(void); +extern void sub_940(void); extern void sub_B54(void); -extern void sub_BBC(void); +extern void sub_B8C(void); +static void InitIntrHandlers(void); extern void sub_CBC(void); extern void sub_D10(void); extern void sub_D74(void); extern void sub_FE8(void); extern void ReadKeys(void); +extern void sub_1F4C(void); +extern void sub_1F5C(void); +extern void sub_1090C(void); +extern void sub_52A18(void); extern u32 IntrMain_Buffer[0x200]; extern u32 IntrMain[]; +extern IntrFunc *gUnknown_0200FB98; +extern IntrFunc *gUnknown_02019BE0; + +extern const IntrFunc gIntrTableTemplate[14]; +#define INTR_COUNT ((int)(sizeof(gIntrTableTemplate)/sizeof(IntrFunc))) +extern IntrFunc gIntrTable[INTR_COUNT]; +extern void (*gUnknown_0200FB9C)(void); +extern void (*gUnknown_0200FBA0)(void); +extern void (*gUnknown_02017BD0)(void); +extern void (*gUnknown_02017BD4)(void); +extern u16 gUnknown_02002000; +extern u16 gUnknown_02002002; + +extern s16 gUnknown_08055C44[]; void AgbMain(void) { RegisterRamReset(0xFF); - sub_BBC(); + InitIntrHandlers(); DmaCopy32(3, IntrMain, IntrMain_Buffer, sizeof(IntrMain_Buffer)); INTR_VECTOR = IntrMain_Buffer; sub_B54(); @@ -49,13 +72,13 @@ void sub_9BC_Main(void) } } -void sub_A08(void) +void HBlankIntr(void) { m4aSoundVSync(); INTR_CHECK |= INTR_FLAG_VBLANK; } -void sub_A20(void) +void VCountIntr(void) { INTR_CHECK |= INTR_FLAG_VCOUNT; while (!(REG_DISPSTAT & DISPSTAT_HBLANK)); @@ -111,3 +134,261 @@ void sub_A20(void) } } } + +void SerialIntr(void) +{ + sub_1F5C(); +} + +void Timer3Intr(void) +{ + sub_1F4C(); +} + +void IntrDummy(void) +{ +} + +void sub_B54(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(); + sub_52A18(); +} + +void sub_B8C(void) +{ + gMain.mainState = 0; + gMain.subState = 0; + gMain.unk16 = 0; + gMain.heldKeys = 0; + gMain.newKeys = 0; + gMain.unk20 = 0; + gMain.rngValue = 0; + gMain.unk4C = 0; + gMain.unk30 = 0; + gMain.vCount = 144; + gMain.unk2C = 0; + sub_1090C(); + sub_438(); +} + +static void InitIntrHandlers(void) +{ + int i; + + for (i = 0; i < INTR_COUNT; i++) + gIntrTable[i] = gIntrTableTemplate[i]; + + gUnknown_0200FB98 = &gIntrTable[2]; + gUnknown_02019BE0 = &gIntrTable[4]; + sub_8BC(); + sub_8FC(); + sub_940(); +} + +// The number 1103515245 comes from the example implementation of rand and srand +// in the ISO C standard. +int 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); +} + +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 sub_D74(void) +{ + gUnknown_0200FB9C = gUnknown_02017BD4; + *gUnknown_0200FB98 = gUnknown_02017BD0; + *gUnknown_02019BE0 = gUnknown_0200FBA0; + if (gUnknown_0200FB9C) + gUnknown_0200FB9C(); + + gMain.unk4C++; +} + +void sub_DC4(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(); + } +} + +void sub_E90(void) +{ + u16 keyInput = REG_KEYINPUT ^ KEYS_MASK; + gUnknown_02002002 = gUnknown_02002000; + gUnknown_02002000 = keyInput; +} |