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vbagx/source/vba/gba/GBA.cpp

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upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include "GBA.h"
#include "GBAcpu.h"
#include "GBAinline.h"
update includes to match new structure
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#include "Globals.h"
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
#include "GBAGfx.h"
update includes to match new structure
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#include "EEprom.h"
#include "Flash.h"
#include "Sound.h"
#include "Sram.h"
#include "bios.h"
#include "Cheats.h"
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
#include "../NLS.h"
update includes to match new structure
2009-01-08 08:35:44 +01:00
#include "elf.h"
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
#include "../Util.h"
update includes to match new structure
2009-01-08 08:35:44 +01:00
#include "../common/Port.h"
upgrade core, fix frameskipping bug
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#include "../System.h"
#include "agbprint.h"
#ifdef PROFILING
#include "prof/prof.h"
#endif
#ifdef __GNUC__
#define _stricmp strcasecmp
#endif
extern int emulating;
#ifdef LINK_EMULATION
extern int linktime;
extern void StartLink(u16);
extern void StartJOYLink(u16);
extern void StartGPLink(u16);
extern void LinkSSend(u16);
extern void LinkUpdate(int);
extern int linktime2;
#endif
int SWITicks = 0;
int IRQTicks = 0;
u32 mastercode = 0;
int layerEnableDelay = 0;
bool busPrefetch = false;
bool busPrefetchEnable = false;
u32 busPrefetchCount = 0;
int cpuDmaTicksToUpdate = 0;
int cpuDmaCount = 0;
bool cpuDmaHack = false;
u32 cpuDmaLast = 0;
int dummyAddress = 0;
bool cpuBreakLoop = false;
int cpuNextEvent = 0;
int gbaSaveType = 0; // used to remember the save type on reset
bool intState = false;
bool stopState = false;
bool holdState = false;
int holdType = 0;
bool cpuSramEnabled = true;
bool cpuFlashEnabled = true;
bool cpuEEPROMEnabled = true;
bool cpuEEPROMSensorEnabled = false;
u32 cpuPrefetch[2];
int cpuTotalTicks = 0;
#ifdef PROFILING
int profilingTicks = 0;
int profilingTicksReload = 0;
static profile_segment *profilSegment = NULL;
#endif
#ifdef BKPT_SUPPORT
u8 freezeWorkRAM[0x40000];
u8 freezeInternalRAM[0x8000];
u8 freezeVRAM[0x18000];
u8 freezePRAM[0x400];
u8 freezeOAM[0x400];
bool debugger_last;
#endif
int lcdTicks = (useBios && !skipBios) ? 1008 : 208;
u8 timerOnOffDelay = 0;
u16 timer0Value = 0;
bool timer0On = false;
int timer0Ticks = 0;
int timer0Reload = 0;
int timer0ClockReload = 0;
u16 timer1Value = 0;
bool timer1On = false;
int timer1Ticks = 0;
int timer1Reload = 0;
int timer1ClockReload = 0;
u16 timer2Value = 0;
bool timer2On = false;
int timer2Ticks = 0;
int timer2Reload = 0;
int timer2ClockReload = 0;
u16 timer3Value = 0;
bool timer3On = false;
int timer3Ticks = 0;
int timer3Reload = 0;
int timer3ClockReload = 0;
u32 dma0Source = 0;
u32 dma0Dest = 0;
u32 dma1Source = 0;
u32 dma1Dest = 0;
u32 dma2Source = 0;
u32 dma2Dest = 0;
u32 dma3Source = 0;
u32 dma3Dest = 0;
void (*cpuSaveGameFunc)(u32,u8) = flashSaveDecide;
void (*renderLine)() = mode0RenderLine;
bool fxOn = false;
bool windowOn = false;
int frameCount = 0;
char buffer[1024];
FILE *out = NULL;
u32 lastTime = 0;
int count = 0;
int capture = 0;
int capturePrevious = 0;
int captureNumber = 0;
const int TIMER_TICKS[4] = {
0,
6,
8,
10
};
const u32 objTilesAddress [3] = {0x010000, 0x014000, 0x014000};
const u8 gamepakRamWaitState[4] = { 4, 3, 2, 8 };
const u8 gamepakWaitState[4] = { 4, 3, 2, 8 };
const u8 gamepakWaitState0[2] = { 2, 1 };
const u8 gamepakWaitState1[2] = { 4, 1 };
const u8 gamepakWaitState2[2] = { 8, 1 };
const bool isInRom [16]=
{ false, false, false, false, false, false, false, false,
true, true, true, true, true, true, false, false };
u8 memoryWait[16] =
{ 0, 0, 2, 0, 0, 0, 0, 0, 4, 4, 4, 4, 4, 4, 4, 0 };
u8 memoryWait32[16] =
{ 0, 0, 5, 0, 0, 1, 1, 0, 7, 7, 9, 9, 13, 13, 4, 0 };
u8 memoryWaitSeq[16] =
{ 0, 0, 2, 0, 0, 0, 0, 0, 2, 2, 4, 4, 8, 8, 4, 0 };
u8 memoryWaitSeq32[16] =
{ 0, 0, 5, 0, 0, 1, 1, 0, 5, 5, 9, 9, 17, 17, 4, 0 };
// The videoMemoryWait constants are used to add some waitstates
// if the opcode access video memory data outside of vblank/hblank
// It seems to happen on only one ticks for each pixel.
// Not used for now (too problematic with current code).
//const u8 videoMemoryWait[16] =
// {0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0};
u8 biosProtected[4];
#ifdef WORDS_BIGENDIAN
bool cpuBiosSwapped = false;
#endif
u32 myROM[] = {
0xEA000006,
0xEA000093,
0xEA000006,
0x00000000,
0x00000000,
0x00000000,
0xEA000088,
0x00000000,
0xE3A00302,
0xE1A0F000,
0xE92D5800,
0xE55EC002,
0xE28FB03C,
0xE79BC10C,
0xE14FB000,
0xE92D0800,
0xE20BB080,
0xE38BB01F,
0xE129F00B,
0xE92D4004,
0xE1A0E00F,
0xE12FFF1C,
0xE8BD4004,
0xE3A0C0D3,
0xE129F00C,
0xE8BD0800,
0xE169F00B,
0xE8BD5800,
0xE1B0F00E,
0x0000009C,
0x0000009C,
0x0000009C,
0x0000009C,
0x000001F8,
0x000001F0,
0x000000AC,
0x000000A0,
0x000000FC,
0x00000168,
0xE12FFF1E,
0xE1A03000,
0xE1A00001,
0xE1A01003,
0xE2113102,
0x42611000,
0xE033C040,
0x22600000,
0xE1B02001,
0xE15200A0,
0x91A02082,
0x3AFFFFFC,
0xE1500002,
0xE0A33003,
0x20400002,
0xE1320001,
0x11A020A2,
0x1AFFFFF9,
0xE1A01000,
0xE1A00003,
0xE1B0C08C,
0x22600000,
0x42611000,
0xE12FFF1E,
0xE92D0010,
0xE1A0C000,
0xE3A01001,
0xE1500001,
0x81A000A0,
0x81A01081,
0x8AFFFFFB,
0xE1A0000C,
0xE1A04001,
0xE3A03000,
0xE1A02001,
0xE15200A0,
0x91A02082,
0x3AFFFFFC,
0xE1500002,
0xE0A33003,
0x20400002,
0xE1320001,
0x11A020A2,
0x1AFFFFF9,
0xE0811003,
0xE1B010A1,
0xE1510004,
0x3AFFFFEE,
0xE1A00004,
0xE8BD0010,
0xE12FFF1E,
0xE0010090,
0xE1A01741,
0xE2611000,
0xE3A030A9,
0xE0030391,
0xE1A03743,
0xE2833E39,
0xE0030391,
0xE1A03743,
0xE2833C09,
0xE283301C,
0xE0030391,
0xE1A03743,
0xE2833C0F,
0xE28330B6,
0xE0030391,
0xE1A03743,
0xE2833C16,
0xE28330AA,
0xE0030391,
0xE1A03743,
0xE2833A02,
0xE2833081,
0xE0030391,
0xE1A03743,
0xE2833C36,
0xE2833051,
0xE0030391,
0xE1A03743,
0xE2833CA2,
0xE28330F9,
0xE0000093,
0xE1A00840,
0xE12FFF1E,
0xE3A00001,
0xE3A01001,
0xE92D4010,
0xE3A03000,
0xE3A04001,
0xE3500000,
0x1B000004,
0xE5CC3301,
0xEB000002,
0x0AFFFFFC,
0xE8BD4010,
0xE12FFF1E,
0xE3A0C301,
0xE5CC3208,
0xE15C20B8,
0xE0110002,
0x10222000,
0x114C20B8,
0xE5CC4208,
0xE12FFF1E,
0xE92D500F,
0xE3A00301,
0xE1A0E00F,
0xE510F004,
0xE8BD500F,
0xE25EF004,
0xE59FD044,
0xE92D5000,
0xE14FC000,
0xE10FE000,
0xE92D5000,
0xE3A0C302,
0xE5DCE09C,
0xE35E00A5,
0x1A000004,
0x05DCE0B4,
0x021EE080,
0xE28FE004,
0x159FF018,
0x059FF018,
0xE59FD018,
0xE8BD5000,
0xE169F00C,
0xE8BD5000,
0xE25EF004,
0x03007FF0,
0x09FE2000,
0x09FFC000,
0x03007FE0
};
variable_desc saveGameStruct[] = {
{ &DISPCNT , sizeof(u16) },
{ &DISPSTAT , sizeof(u16) },
{ &VCOUNT , sizeof(u16) },
{ &BG0CNT , sizeof(u16) },
{ &BG1CNT , sizeof(u16) },
{ &BG2CNT , sizeof(u16) },
{ &BG3CNT , sizeof(u16) },
{ &BG0HOFS , sizeof(u16) },
{ &BG0VOFS , sizeof(u16) },
{ &BG1HOFS , sizeof(u16) },
{ &BG1VOFS , sizeof(u16) },
{ &BG2HOFS , sizeof(u16) },
{ &BG2VOFS , sizeof(u16) },
{ &BG3HOFS , sizeof(u16) },
{ &BG3VOFS , sizeof(u16) },
{ &BG2PA , sizeof(u16) },
{ &BG2PB , sizeof(u16) },
{ &BG2PC , sizeof(u16) },
{ &BG2PD , sizeof(u16) },
{ &BG2X_L , sizeof(u16) },
{ &BG2X_H , sizeof(u16) },
{ &BG2Y_L , sizeof(u16) },
{ &BG2Y_H , sizeof(u16) },
{ &BG3PA , sizeof(u16) },
{ &BG3PB , sizeof(u16) },
{ &BG3PC , sizeof(u16) },
{ &BG3PD , sizeof(u16) },
{ &BG3X_L , sizeof(u16) },
{ &BG3X_H , sizeof(u16) },
{ &BG3Y_L , sizeof(u16) },
{ &BG3Y_H , sizeof(u16) },
{ &WIN0H , sizeof(u16) },
{ &WIN1H , sizeof(u16) },
{ &WIN0V , sizeof(u16) },
{ &WIN1V , sizeof(u16) },
{ &WININ , sizeof(u16) },
{ &WINOUT , sizeof(u16) },
{ &MOSAIC , sizeof(u16) },
{ &BLDMOD , sizeof(u16) },
{ &COLEV , sizeof(u16) },
{ &COLY , sizeof(u16) },
{ &DM0SAD_L , sizeof(u16) },
{ &DM0SAD_H , sizeof(u16) },
{ &DM0DAD_L , sizeof(u16) },
{ &DM0DAD_H , sizeof(u16) },
{ &DM0CNT_L , sizeof(u16) },
{ &DM0CNT_H , sizeof(u16) },
{ &DM1SAD_L , sizeof(u16) },
{ &DM1SAD_H , sizeof(u16) },
{ &DM1DAD_L , sizeof(u16) },
{ &DM1DAD_H , sizeof(u16) },
{ &DM1CNT_L , sizeof(u16) },
{ &DM1CNT_H , sizeof(u16) },
{ &DM2SAD_L , sizeof(u16) },
{ &DM2SAD_H , sizeof(u16) },
{ &DM2DAD_L , sizeof(u16) },
{ &DM2DAD_H , sizeof(u16) },
{ &DM2CNT_L , sizeof(u16) },
{ &DM2CNT_H , sizeof(u16) },
{ &DM3SAD_L , sizeof(u16) },
{ &DM3SAD_H , sizeof(u16) },
{ &DM3DAD_L , sizeof(u16) },
{ &DM3DAD_H , sizeof(u16) },
{ &DM3CNT_L , sizeof(u16) },
{ &DM3CNT_H , sizeof(u16) },
{ &TM0D , sizeof(u16) },
{ &TM0CNT , sizeof(u16) },
{ &TM1D , sizeof(u16) },
{ &TM1CNT , sizeof(u16) },
{ &TM2D , sizeof(u16) },
{ &TM2CNT , sizeof(u16) },
{ &TM3D , sizeof(u16) },
{ &TM3CNT , sizeof(u16) },
{ &P1 , sizeof(u16) },
{ &IE , sizeof(u16) },
{ &IF , sizeof(u16) },
{ &IME , sizeof(u16) },
{ &holdState, sizeof(bool) },
{ &holdType, sizeof(int) },
{ &lcdTicks, sizeof(int) },
{ &timer0On , sizeof(bool) },
{ &timer0Ticks , sizeof(int) },
{ &timer0Reload , sizeof(int) },
{ &timer0ClockReload , sizeof(int) },
{ &timer1On , sizeof(bool) },
{ &timer1Ticks , sizeof(int) },
{ &timer1Reload , sizeof(int) },
{ &timer1ClockReload , sizeof(int) },
{ &timer2On , sizeof(bool) },
{ &timer2Ticks , sizeof(int) },
{ &timer2Reload , sizeof(int) },
{ &timer2ClockReload , sizeof(int) },
{ &timer3On , sizeof(bool) },
{ &timer3Ticks , sizeof(int) },
{ &timer3Reload , sizeof(int) },
{ &timer3ClockReload , sizeof(int) },
{ &dma0Source , sizeof(u32) },
{ &dma0Dest , sizeof(u32) },
{ &dma1Source , sizeof(u32) },
{ &dma1Dest , sizeof(u32) },
{ &dma2Source , sizeof(u32) },
{ &dma2Dest , sizeof(u32) },
{ &dma3Source , sizeof(u32) },
{ &dma3Dest , sizeof(u32) },
{ &fxOn, sizeof(bool) },
{ &windowOn, sizeof(bool) },
{ &N_FLAG , sizeof(bool) },
{ &C_FLAG , sizeof(bool) },
{ &Z_FLAG , sizeof(bool) },
{ &V_FLAG , sizeof(bool) },
{ &armState , sizeof(bool) },
{ &armIrqEnable , sizeof(bool) },
{ &armNextPC , sizeof(u32) },
{ &armMode , sizeof(int) },
{ &saveType , sizeof(int) },
{ NULL, 0 }
};
static int romSize = 0x2000000;
#ifdef PROFILING
void cpuProfil(profile_segment *seg)
{
profilSegment = seg;
}
void cpuEnableProfiling(int hz)
{
if(hz == 0)
hz = 100;
profilingTicks = profilingTicksReload = 16777216 / hz;
profSetHertz(hz);
}
#endif
inline int CPUUpdateTicks()
{
int cpuLoopTicks = lcdTicks;
if(soundTicks < cpuLoopTicks)
cpuLoopTicks = soundTicks;
if(timer0On && (timer0Ticks < cpuLoopTicks)) {
cpuLoopTicks = timer0Ticks;
}
if(timer1On && !(TM1CNT & 4) && (timer1Ticks < cpuLoopTicks)) {
cpuLoopTicks = timer1Ticks;
}
if(timer2On && !(TM2CNT & 4) && (timer2Ticks < cpuLoopTicks)) {
cpuLoopTicks = timer2Ticks;
}
if(timer3On && !(TM3CNT & 4) && (timer3Ticks < cpuLoopTicks)) {
cpuLoopTicks = timer3Ticks;
}
#ifdef PROFILING
if(profilingTicksReload != 0) {
if(profilingTicks < cpuLoopTicks) {
cpuLoopTicks = profilingTicks;
}
}
#endif
if (SWITicks) {
if (SWITicks < cpuLoopTicks)
cpuLoopTicks = SWITicks;
}
if (IRQTicks) {
if (IRQTicks < cpuLoopTicks)
cpuLoopTicks = IRQTicks;
}
return cpuLoopTicks;
}
void CPUUpdateWindow0()
{
int x00 = WIN0H>>8;
int x01 = WIN0H & 255;
if(x00 <= x01) {
for(int i = 0; i < 240; i++) {
gfxInWin0[i] = (i >= x00 && i < x01);
}
} else {
for(int i = 0; i < 240; i++) {
gfxInWin0[i] = (i >= x00 || i < x01);
}
}
}
void CPUUpdateWindow1()
{
int x00 = WIN1H>>8;
int x01 = WIN1H & 255;
if(x00 <= x01) {
for(int i = 0; i < 240; i++) {
gfxInWin1[i] = (i >= x00 && i < x01);
}
} else {
for(int i = 0; i < 240; i++) {
gfxInWin1[i] = (i >= x00 || i < x01);
}
}
}
extern u32 line0[240];
extern u32 line1[240];
extern u32 line2[240];
extern u32 line3[240];
#define CLEAR_ARRAY(a) \
{\
u32 *array = (a);\
for(int i = 0; i < 240; i++) {\
*array++ = 0x80000000;\
}\
}\
void CPUUpdateRenderBuffers(bool force)
{
if(!(layerEnable & 0x0100) || force) {
CLEAR_ARRAY(line0);
}
if(!(layerEnable & 0x0200) || force) {
CLEAR_ARRAY(line1);
}
if(!(layerEnable & 0x0400) || force) {
CLEAR_ARRAY(line2);
}
if(!(layerEnable & 0x0800) || force) {
CLEAR_ARRAY(line3);
}
}
static bool CPUWriteState(gzFile gzFile)
{
utilWriteInt(gzFile, SAVE_GAME_VERSION);
utilGzWrite(gzFile, &rom[0xa0], 16);
utilWriteInt(gzFile, useBios);
utilGzWrite(gzFile, &reg[0], sizeof(reg));
utilWriteData(gzFile, saveGameStruct);
// new to version 0.7.1
utilWriteInt(gzFile, stopState);
// new to version 0.8
utilWriteInt(gzFile, IRQTicks);
utilGzWrite(gzFile, internalRAM, 0x8000);
utilGzWrite(gzFile, paletteRAM, 0x400);
utilGzWrite(gzFile, workRAM, 0x40000);
utilGzWrite(gzFile, vram, 0x20000);
utilGzWrite(gzFile, oam, 0x400);
utilGzWrite(gzFile, pix, 4*241*162);
utilGzWrite(gzFile, ioMem, 0x400);
eepromSaveGame(gzFile);
flashSaveGame(gzFile);
soundSaveGame(gzFile);
cheatsSaveGame(gzFile);
// version 1.5
rtcSaveGame(gzFile);
return true;
}
bool CPUWriteState(const char *file)
{
gzFile gzFile = utilGzOpen(file, "wb");
if(gzFile == NULL) {
systemMessage(MSG_ERROR_CREATING_FILE, N_("Error creating file %s"), file);
return false;
}
bool res = CPUWriteState(gzFile);
utilGzClose(gzFile);
return res;
}
bool CPUWriteMemState(char *memory, int available)
{
gzFile gzFile = utilMemGzOpen(memory, available, "w");
if(gzFile == NULL) {
return false;
}
bool res = CPUWriteState(gzFile);
long pos = utilGzMemTell(gzFile)+8;
if(pos >= (available))
res = false;
utilGzClose(gzFile);
return res;
}
static bool CPUReadState(gzFile gzFile)
{
int version = utilReadInt(gzFile);
if(version > SAVE_GAME_VERSION || version < SAVE_GAME_VERSION_1) {
systemMessage(MSG_UNSUPPORTED_VBA_SGM,
N_("Unsupported VisualBoyAdvance save game version %d"),
version);
return false;
}
u8 romname[17];
utilGzRead(gzFile, romname, 16);
if(memcmp(&rom[0xa0], romname, 16) != 0) {
romname[16]=0;
for(int i = 0; i < 16; i++)
if(romname[i] < 32)
romname[i] = 32;
systemMessage(MSG_CANNOT_LOAD_SGM, N_("Cannot load save game for %s"), romname);
return false;
}
bool ub = utilReadInt(gzFile) ? true : false;
if(ub != useBios) {
if(useBios)
systemMessage(MSG_SAVE_GAME_NOT_USING_BIOS,
N_("Save game is not using the BIOS files"));
else
systemMessage(MSG_SAVE_GAME_USING_BIOS,
N_("Save game is using the BIOS file"));
return false;
}
utilGzRead(gzFile, &reg[0], sizeof(reg));
utilReadData(gzFile, saveGameStruct);
if(version < SAVE_GAME_VERSION_3)
stopState = false;
else
stopState = utilReadInt(gzFile) ? true : false;
if(version < SAVE_GAME_VERSION_4)
{
IRQTicks = 0;
intState = false;
}
else
{
IRQTicks = utilReadInt(gzFile);
if (IRQTicks>0)
intState = true;
else
{
intState = false;
IRQTicks = 0;
}
}
utilGzRead(gzFile, internalRAM, 0x8000);
utilGzRead(gzFile, paletteRAM, 0x400);
utilGzRead(gzFile, workRAM, 0x40000);
utilGzRead(gzFile, vram, 0x20000);
utilGzRead(gzFile, oam, 0x400);
if(version < SAVE_GAME_VERSION_6)
utilGzRead(gzFile, pix, 4*240*160);
else
utilGzRead(gzFile, pix, 4*241*162);
utilGzRead(gzFile, ioMem, 0x400);
if(skipSaveGameBattery) {
// skip eeprom data
eepromReadGameSkip(gzFile, version);
// skip flash data
flashReadGameSkip(gzFile, version);
} else {
eepromReadGame(gzFile, version);
flashReadGame(gzFile, version);
}
soundReadGame(gzFile, version);
if(version > SAVE_GAME_VERSION_1) {
minor changes
2009-01-10 08:44:34 +01:00
if(skipSaveGameCheats) {
// skip cheats list data
cheatsReadGameSkip(gzFile, version);
} else {
cheatsReadGame(gzFile, version);
}
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
}
if(version > SAVE_GAME_VERSION_6) {
rtcReadGame(gzFile);
}
if(version <= SAVE_GAME_VERSION_7) {
u32 temp;
#define SWAP(a,b,c) \
temp = (a);\
(a) = (b)<<16|(c);\
(b) = (temp) >> 16;\
(c) = (temp) & 0xFFFF;
SWAP(dma0Source, DM0SAD_H, DM0SAD_L);
SWAP(dma0Dest, DM0DAD_H, DM0DAD_L);
SWAP(dma1Source, DM1SAD_H, DM1SAD_L);
SWAP(dma1Dest, DM1DAD_H, DM1DAD_L);
SWAP(dma2Source, DM2SAD_H, DM2SAD_L);
SWAP(dma2Dest, DM2DAD_H, DM2DAD_L);
SWAP(dma3Source, DM3SAD_H, DM3SAD_L);
SWAP(dma3Dest, DM3DAD_H, DM3DAD_L);
}
if(version <= SAVE_GAME_VERSION_8) {
timer0ClockReload = TIMER_TICKS[TM0CNT & 3];
timer1ClockReload = TIMER_TICKS[TM1CNT & 3];
timer2ClockReload = TIMER_TICKS[TM2CNT & 3];
timer3ClockReload = TIMER_TICKS[TM3CNT & 3];
timer0Ticks = ((0x10000 - TM0D) << timer0ClockReload) - timer0Ticks;
timer1Ticks = ((0x10000 - TM1D) << timer1ClockReload) - timer1Ticks;
timer2Ticks = ((0x10000 - TM2D) << timer2ClockReload) - timer2Ticks;
timer3Ticks = ((0x10000 - TM3D) << timer3ClockReload) - timer3Ticks;
minor changes
2009-01-10 08:44:34 +01:00
interp_rate();
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
}
// set pointers!
layerEnable = layerSettings & DISPCNT;
CPUUpdateRender();
CPUUpdateRenderBuffers(true);
CPUUpdateWindow0();
CPUUpdateWindow1();
gbaSaveType = 0;
switch(saveType) {
case 0:
cpuSaveGameFunc = flashSaveDecide;
break;
case 1:
cpuSaveGameFunc = sramWrite;
gbaSaveType = 1;
break;
case 2:
cpuSaveGameFunc = flashWrite;
gbaSaveType = 2;
break;
case 3:
break;
case 5:
gbaSaveType = 5;
break;
default:
systemMessage(MSG_UNSUPPORTED_SAVE_TYPE,
N_("Unsupported save type %d"), saveType);
break;
}
if(eepromInUse)
gbaSaveType = 3;
systemSaveUpdateCounter = SYSTEM_SAVE_NOT_UPDATED;
if(armState) {
ARM_PREFETCH;
} else {
THUMB_PREFETCH;
}
CPUUpdateRegister(0x204, CPUReadHalfWordQuick(0x4000204));
return true;
}
bool CPUReadMemState(char *memory, int available)
{
gzFile gzFile = utilMemGzOpen(memory, available, "r");
bool res = CPUReadState(gzFile);
utilGzClose(gzFile);
return res;
}
bool CPUReadState(const char * file)
{
gzFile gzFile = utilGzOpen(file, "rb");
if(gzFile == NULL)
return false;
bool res = CPUReadState(gzFile);
utilGzClose(gzFile);
return res;
}
bool CPUExportEepromFile(const char *fileName)
{
if(eepromInUse) {
FILE *file = fopen(fileName, "wb");
if(!file) {
systemMessage(MSG_ERROR_CREATING_FILE, N_("Error creating file %s"),
fileName);
return false;
}
for(int i = 0; i < eepromSize;) {
for(int j = 0; j < 8; j++) {
if(fwrite(&eepromData[i+7-j], 1, 1, file) != 1) {
fclose(file);
return false;
}
}
i += 8;
}
fclose(file);
}
return true;
}
bool CPUWriteBatteryFile(const char *fileName)
{
if(gbaSaveType == 0) {
if(eepromInUse)
gbaSaveType = 3;
else switch(saveType) {
case 1:
gbaSaveType = 1;
break;
case 2:
gbaSaveType = 2;
break;
}
}
if((gbaSaveType) && (gbaSaveType!=5)) {
FILE *file = fopen(fileName, "wb");
if(!file) {
systemMessage(MSG_ERROR_CREATING_FILE, N_("Error creating file %s"),
fileName);
return false;
}
// only save if Flash/Sram in use or EEprom in use
if(gbaSaveType != 3) {
if(gbaSaveType == 2) {
if(fwrite(flashSaveMemory, 1, flashSize, file) != (size_t)flashSize) {
fclose(file);
return false;
}
} else {
if(fwrite(flashSaveMemory, 1, 0x10000, file) != 0x10000) {
fclose(file);
return false;
}
}
} else {
if(fwrite(eepromData, 1, eepromSize, file) != (size_t)eepromSize) {
fclose(file);
return false;
}
}
fclose(file);
}
return true;
}
bool CPUReadGSASnapshot(const char *fileName)
{
int i;
FILE *file = fopen(fileName, "rb");
if(!file) {
systemMessage(MSG_CANNOT_OPEN_FILE, N_("Cannot open file %s"), fileName);
return false;
}
// check file size to know what we should read
fseek(file, 0, SEEK_END);
// long size = ftell(file);
fseek(file, 0x0, SEEK_SET);
fread(&i, 1, 4, file);
fseek(file, i, SEEK_CUR); // Skip SharkPortSave
fseek(file, 4, SEEK_CUR); // skip some sort of flag
fread(&i, 1, 4, file); // name length
fseek(file, i, SEEK_CUR); // skip name
fread(&i, 1, 4, file); // desc length
fseek(file, i, SEEK_CUR); // skip desc
fread(&i, 1, 4, file); // notes length
fseek(file, i, SEEK_CUR); // skip notes
int saveSize;
fread(&saveSize, 1, 4, file); // read length
saveSize -= 0x1c; // remove header size
char buffer[17];
char buffer2[17];
fread(buffer, 1, 16, file);
buffer[16] = 0;
for(i = 0; i < 16; i++)
if(buffer[i] < 32)
buffer[i] = 32;
memcpy(buffer2, &rom[0xa0], 16);
buffer2[16] = 0;
for(i = 0; i < 16; i++)
if(buffer2[i] < 32)
buffer2[i] = 32;
if(memcmp(buffer, buffer2, 16)) {
systemMessage(MSG_CANNOT_IMPORT_SNAPSHOT_FOR,
N_("Cannot import snapshot for %s. Current game is %s"),
buffer,
buffer2);
fclose(file);
return false;
}
fseek(file, 12, SEEK_CUR); // skip some flags
if(saveSize >= 65536) {
if(fread(flashSaveMemory, 1, saveSize, file) != (size_t)saveSize) {
fclose(file);
return false;
}
} else {
systemMessage(MSG_UNSUPPORTED_SNAPSHOT_FILE,
N_("Unsupported snapshot file %s"),
fileName);
fclose(file);
return false;
}
fclose(file);
CPUReset();
return true;
}
bool CPUWriteGSASnapshot(const char *fileName,
const char *title,
const char *desc,
const char *notes)
{
FILE *file = fopen(fileName, "wb");
if(!file) {
systemMessage(MSG_CANNOT_OPEN_FILE, N_("Cannot open file %s"), fileName);
return false;
}
u8 buffer[17];
utilPutDword(buffer, 0x0d); // SharkPortSave length
fwrite(buffer, 1, 4, file);
fwrite("SharkPortSave", 1, 0x0d, file);
utilPutDword(buffer, 0x000f0000);
fwrite(buffer, 1, 4, file); // save type 0x000f0000 = GBA save
utilPutDword(buffer, (u32)strlen(title));
fwrite(buffer, 1, 4, file); // title length
fwrite(title, 1, strlen(title), file);
utilPutDword(buffer, (u32)strlen(desc));
fwrite(buffer, 1, 4, file); // desc length
fwrite(desc, 1, strlen(desc), file);
utilPutDword(buffer, (u32)strlen(notes));
fwrite(buffer, 1, 4, file); // notes length
fwrite(notes, 1, strlen(notes), file);
int saveSize = 0x10000;
if(gbaSaveType == 2)
saveSize = flashSize;
int totalSize = saveSize + 0x1c;
utilPutDword(buffer, totalSize); // length of remainder of save - CRC
fwrite(buffer, 1, 4, file);
char temp[0x2001c];
memset(temp, 0, 28);
memcpy(temp, &rom[0xa0], 16); // copy internal name
temp[0x10] = rom[0xbe]; // reserved area (old checksum)
temp[0x11] = rom[0xbf]; // reserved area (old checksum)
temp[0x12] = rom[0xbd]; // complement check
temp[0x13] = rom[0xb0]; // maker
temp[0x14] = 1; // 1 save ?
memcpy(&temp[0x1c], flashSaveMemory, saveSize); // copy save
fwrite(temp, 1, totalSize, file); // write save + header
u32 crc = 0;
for(int i = 0; i < totalSize; i++) {
crc += ((u32)temp[i] << (crc % 0x18));
}
utilPutDword(buffer, crc);
fwrite(buffer, 1, 4, file); // CRC?
fclose(file);
return true;
}
bool CPUImportEepromFile(const char *fileName)
{
FILE *file = fopen(fileName, "rb");
if(!file)
return false;
// check file size to know what we should read
fseek(file, 0, SEEK_END);
long size = ftell(file);
fseek(file, 0, SEEK_SET);
if(size == 512 || size == 0x2000) {
if(fread(eepromData, 1, size, file) != (size_t)size) {
fclose(file);
return false;
}
for(int i = 0; i < size;) {
u8 tmp = eepromData[i];
eepromData[i] = eepromData[7-i];
eepromData[7-i] = tmp;
i++;
tmp = eepromData[i];
eepromData[i] = eepromData[7-i];
eepromData[7-i] = tmp;
i++;
tmp = eepromData[i];
eepromData[i] = eepromData[7-i];
eepromData[7-i] = tmp;
i++;
tmp = eepromData[i];
eepromData[i] = eepromData[7-i];
eepromData[7-i] = tmp;
i++;
i += 4;
}
} else
return false;
fclose(file);
return true;
}
bool CPUReadBatteryFile(const char *fileName)
{
FILE *file = fopen(fileName, "rb");
if(!file)
return false;
// check file size to know what we should read
fseek(file, 0, SEEK_END);
long size = ftell(file);
fseek(file, 0, SEEK_SET);
systemSaveUpdateCounter = SYSTEM_SAVE_NOT_UPDATED;
if(size == 512 || size == 0x2000) {
if(fread(eepromData, 1, size, file) != (size_t)size) {
fclose(file);
return false;
}
} else {
if(size == 0x20000) {
if(fread(flashSaveMemory, 1, 0x20000, file) != 0x20000) {
fclose(file);
return false;
}
flashSetSize(0x20000);
} else {
if(fread(flashSaveMemory, 1, 0x10000, file) != 0x10000) {
fclose(file);
return false;
}
flashSetSize(0x10000);
}
}
fclose(file);
return true;
}
bool CPUWritePNGFile(const char *fileName)
{
return utilWritePNGFile(fileName, 240, 160, pix);
}
bool CPUWriteBMPFile(const char *fileName)
{
return utilWriteBMPFile(fileName, 240, 160, pix);
}
bool CPUIsZipFile(const char * file)
{
if(strlen(file) > 4) {
const char * p = strrchr(file,'.');
if(p != NULL) {
if(_stricmp(p, ".zip") == 0)
return true;
}
}
return false;
}
bool CPUIsGBAImage(const char * file)
{
cpuIsMultiBoot = false;
if(strlen(file) > 4) {
const char * p = strrchr(file,'.');
if(p != NULL) {
if(_stricmp(p, ".gba") == 0)
return true;
if(_stricmp(p, ".agb") == 0)
return true;
if(_stricmp(p, ".bin") == 0)
return true;
if(_stricmp(p, ".elf") == 0)
return true;
if(_stricmp(p, ".mb") == 0) {
cpuIsMultiBoot = true;
return true;
}
}
}
return false;
}
bool CPUIsGBABios(const char * file)
{
if(strlen(file) > 4) {
const char * p = strrchr(file,'.');
if(p != NULL) {
if(_stricmp(p, ".gba") == 0)
return true;
if(_stricmp(p, ".agb") == 0)
return true;
if(_stricmp(p, ".bin") == 0)
return true;
if(_stricmp(p, ".bios") == 0)
return true;
if(_stricmp(p, ".rom") == 0)
return true;
}
}
return false;
}
bool CPUIsELF(const char *file)
{
if(strlen(file) > 4) {
const char * p = strrchr(file,'.');
if(p != NULL) {
if(_stricmp(p, ".elf") == 0)
return true;
}
}
return false;
}
void CPUCleanUp()
{
#ifdef PROFILING
if(profilingTicksReload) {
profCleanup();
}
#endif
if(rom != NULL) {
free(rom);
rom = NULL;
}
if(vram != NULL) {
free(vram);
vram = NULL;
}
if(paletteRAM != NULL) {
free(paletteRAM);
paletteRAM = NULL;
}
if(internalRAM != NULL) {
free(internalRAM);
internalRAM = NULL;
}
if(workRAM != NULL) {
free(workRAM);
workRAM = NULL;
}
if(bios != NULL) {
free(bios);
bios = NULL;
}
if(pix != NULL) {
free(pix);
pix = NULL;
}
if(oam != NULL) {
free(oam);
oam = NULL;
}
if(ioMem != NULL) {
free(ioMem);
ioMem = NULL;
}
#ifndef NO_DEBUGGER
elfCleanUp();
#endif //NO_DEBUGGER
systemSaveUpdateCounter = SYSTEM_SAVE_NOT_UPDATED;
emulating = 0;
}
int CPULoadRom(const char *szFile)
{
romSize = 0x2000000;
if(rom != NULL) {
CPUCleanUp();
}
systemSaveUpdateCounter = SYSTEM_SAVE_NOT_UPDATED;
rom = (u8 *)malloc(0x2000000);
if(rom == NULL) {
systemMessage(MSG_OUT_OF_MEMORY, N_("Failed to allocate memory for %s"),
"ROM");
return 0;
}
workRAM = (u8 *)calloc(1, 0x40000);
if(workRAM == NULL) {
systemMessage(MSG_OUT_OF_MEMORY, N_("Failed to allocate memory for %s"),
"WRAM");
return 0;
}
u8 *whereToLoad = cpuIsMultiBoot ? workRAM : rom;
#ifndef NO_DEBUGGER
if(CPUIsELF(szFile)) {
FILE *f = fopen(szFile, "rb");
if(!f) {
systemMessage(MSG_ERROR_OPENING_IMAGE, N_("Error opening image %s"),
szFile);
free(rom);
rom = NULL;
free(workRAM);
workRAM = NULL;
return 0;
}
bool res = elfRead(szFile, romSize, f);
if(!res || romSize == 0) {
free(rom);
rom = NULL;
free(workRAM);
workRAM = NULL;
elfCleanUp();
return 0;
}
} else
#endif //NO_DEBUGGER
if(!utilLoad(szFile,
utilIsGBAImage,
whereToLoad,
romSize)) {
free(rom);
rom = NULL;
free(workRAM);
workRAM = NULL;
return 0;
}
u16 *temp = (u16 *)(rom+((romSize+1)&~1));
int i;
for(i = (romSize+1)&~1; i < 0x2000000; i+=2) {
WRITE16LE(temp, (i >> 1) & 0xFFFF);
temp++;
}
bios = (u8 *)calloc(1,0x4000);
if(bios == NULL) {
systemMessage(MSG_OUT_OF_MEMORY, N_("Failed to allocate memory for %s"),
"BIOS");
CPUCleanUp();
return 0;
}
internalRAM = (u8 *)calloc(1,0x8000);
if(internalRAM == NULL) {
systemMessage(MSG_OUT_OF_MEMORY, N_("Failed to allocate memory for %s"),
"IRAM");
CPUCleanUp();
return 0;
}
paletteRAM = (u8 *)calloc(1,0x400);
if(paletteRAM == NULL) {
systemMessage(MSG_OUT_OF_MEMORY, N_("Failed to allocate memory for %s"),
"PRAM");
CPUCleanUp();
return 0;
}
vram = (u8 *)calloc(1, 0x20000);
if(vram == NULL) {
systemMessage(MSG_OUT_OF_MEMORY, N_("Failed to allocate memory for %s"),
"VRAM");
CPUCleanUp();
return 0;
}
oam = (u8 *)calloc(1, 0x400);
if(oam == NULL) {
systemMessage(MSG_OUT_OF_MEMORY, N_("Failed to allocate memory for %s"),
"OAM");
CPUCleanUp();
return 0;
}
pix = (u8 *)calloc(1, 4 * 241 * 162);
if(pix == NULL) {
systemMessage(MSG_OUT_OF_MEMORY, N_("Failed to allocate memory for %s"),
"PIX");
CPUCleanUp();
return 0;
}
ioMem = (u8 *)calloc(1, 0x400);
if(ioMem == NULL) {
systemMessage(MSG_OUT_OF_MEMORY, N_("Failed to allocate memory for %s"),
"IO");
CPUCleanUp();
return 0;
}
flashInit();
eepromInit();
CPUUpdateRenderBuffers(true);
return romSize;
}
void doMirroring (bool b)
{
u32 mirroredRomSize = (((romSize)>>20) & 0x3F)<<20;
u32 mirroredRomAddress = romSize;
if ((mirroredRomSize <=0x800000) && (b))
{
mirroredRomAddress = mirroredRomSize;
if (mirroredRomSize==0)
mirroredRomSize=0x100000;
while (mirroredRomAddress<0x01000000)
{
memcpy ((u16 *)(rom+mirroredRomAddress), (u16 *)(rom), mirroredRomSize);
mirroredRomAddress+=mirroredRomSize;
}
}
}
void CPUUpdateRender()
{
switch(DISPCNT & 7) {
case 0:
if((!fxOn && !windowOn && !(layerEnable & 0x8000)) ||
cpuDisableSfx)
renderLine = mode0RenderLine;
else if(fxOn && !windowOn && !(layerEnable & 0x8000))
renderLine = mode0RenderLineNoWindow;
else
renderLine = mode0RenderLineAll;
break;
case 1:
if((!fxOn && !windowOn && !(layerEnable & 0x8000)) ||
cpuDisableSfx)
renderLine = mode1RenderLine;
else if(fxOn && !windowOn && !(layerEnable & 0x8000))
renderLine = mode1RenderLineNoWindow;
else
renderLine = mode1RenderLineAll;
break;
case 2:
if((!fxOn && !windowOn && !(layerEnable & 0x8000)) ||
cpuDisableSfx)
renderLine = mode2RenderLine;
else if(fxOn && !windowOn && !(layerEnable & 0x8000))
renderLine = mode2RenderLineNoWindow;
else
renderLine = mode2RenderLineAll;
break;
case 3:
if((!fxOn && !windowOn && !(layerEnable & 0x8000)) ||
cpuDisableSfx)
renderLine = mode3RenderLine;
else if(fxOn && !windowOn && !(layerEnable & 0x8000))
renderLine = mode3RenderLineNoWindow;
else
renderLine = mode3RenderLineAll;
break;
case 4:
if((!fxOn && !windowOn && !(layerEnable & 0x8000)) ||
cpuDisableSfx)
renderLine = mode4RenderLine;
else if(fxOn && !windowOn && !(layerEnable & 0x8000))
renderLine = mode4RenderLineNoWindow;
else
renderLine = mode4RenderLineAll;
break;
case 5:
if((!fxOn && !windowOn && !(layerEnable & 0x8000)) ||
cpuDisableSfx)
renderLine = mode5RenderLine;
else if(fxOn && !windowOn && !(layerEnable & 0x8000))
renderLine = mode5RenderLineNoWindow;
else
renderLine = mode5RenderLineAll;
default:
break;
}
}
void CPUUpdateCPSR()
{
u32 CPSR = reg[16].I & 0x40;
if(N_FLAG)
CPSR |= 0x80000000;
if(Z_FLAG)
CPSR |= 0x40000000;
if(C_FLAG)
CPSR |= 0x20000000;
if(V_FLAG)
CPSR |= 0x10000000;
if(!armState)
CPSR |= 0x00000020;
if(!armIrqEnable)
CPSR |= 0x80;
CPSR |= (armMode & 0x1F);
reg[16].I = CPSR;
}
void CPUUpdateFlags(bool breakLoop)
{
u32 CPSR = reg[16].I;
N_FLAG = (CPSR & 0x80000000) ? true: false;
Z_FLAG = (CPSR & 0x40000000) ? true: false;
C_FLAG = (CPSR & 0x20000000) ? true: false;
V_FLAG = (CPSR & 0x10000000) ? true: false;
armState = (CPSR & 0x20) ? false : true;
armIrqEnable = (CPSR & 0x80) ? false : true;
if(breakLoop) {
if (armIrqEnable && (IF & IE) && (IME & 1))
cpuNextEvent = cpuTotalTicks;
}
}
void CPUUpdateFlags()
{
CPUUpdateFlags(true);
}
#ifdef WORDS_BIGENDIAN
static void CPUSwap(volatile u32 *a, volatile u32 *b)
{
volatile u32 c = *b;
*b = *a;
*a = c;
}
#else
static void CPUSwap(u32 *a, u32 *b)
{
u32 c = *b;
*b = *a;
*a = c;
}
#endif
void CPUSwitchMode(int mode, bool saveState, bool breakLoop)
{
// if(armMode == mode)
// return;
CPUUpdateCPSR();
switch(armMode) {
case 0x10:
case 0x1F:
reg[R13_USR].I = reg[13].I;
reg[R14_USR].I = reg[14].I;
reg[17].I = reg[16].I;
break;
case 0x11:
CPUSwap(&reg[R8_FIQ].I, &reg[8].I);
CPUSwap(&reg[R9_FIQ].I, &reg[9].I);
CPUSwap(&reg[R10_FIQ].I, &reg[10].I);
CPUSwap(&reg[R11_FIQ].I, &reg[11].I);
CPUSwap(&reg[R12_FIQ].I, &reg[12].I);
reg[R13_FIQ].I = reg[13].I;
reg[R14_FIQ].I = reg[14].I;
reg[SPSR_FIQ].I = reg[17].I;
break;
case 0x12:
reg[R13_IRQ].I = reg[13].I;
reg[R14_IRQ].I = reg[14].I;
reg[SPSR_IRQ].I = reg[17].I;
break;
case 0x13:
reg[R13_SVC].I = reg[13].I;
reg[R14_SVC].I = reg[14].I;
reg[SPSR_SVC].I = reg[17].I;
break;
case 0x17:
reg[R13_ABT].I = reg[13].I;
reg[R14_ABT].I = reg[14].I;
reg[SPSR_ABT].I = reg[17].I;
break;
case 0x1b:
reg[R13_UND].I = reg[13].I;
reg[R14_UND].I = reg[14].I;
reg[SPSR_UND].I = reg[17].I;
break;
}
u32 CPSR = reg[16].I;
u32 SPSR = reg[17].I;
switch(mode) {
case 0x10:
case 0x1F:
reg[13].I = reg[R13_USR].I;
reg[14].I = reg[R14_USR].I;
reg[16].I = SPSR;
break;
case 0x11:
CPUSwap(&reg[8].I, &reg[R8_FIQ].I);
CPUSwap(&reg[9].I, &reg[R9_FIQ].I);
CPUSwap(&reg[10].I, &reg[R10_FIQ].I);
CPUSwap(&reg[11].I, &reg[R11_FIQ].I);
CPUSwap(&reg[12].I, &reg[R12_FIQ].I);
reg[13].I = reg[R13_FIQ].I;
reg[14].I = reg[R14_FIQ].I;
if(saveState)
reg[17].I = CPSR;
else
reg[17].I = reg[SPSR_FIQ].I;
break;
case 0x12:
reg[13].I = reg[R13_IRQ].I;
reg[14].I = reg[R14_IRQ].I;
reg[16].I = SPSR;
if(saveState)
reg[17].I = CPSR;
else
reg[17].I = reg[SPSR_IRQ].I;
break;
case 0x13:
reg[13].I = reg[R13_SVC].I;
reg[14].I = reg[R14_SVC].I;
reg[16].I = SPSR;
if(saveState)
reg[17].I = CPSR;
else
reg[17].I = reg[SPSR_SVC].I;
break;
case 0x17:
reg[13].I = reg[R13_ABT].I;
reg[14].I = reg[R14_ABT].I;
reg[16].I = SPSR;
if(saveState)
reg[17].I = CPSR;
else
reg[17].I = reg[SPSR_ABT].I;
break;
case 0x1b:
reg[13].I = reg[R13_UND].I;
reg[14].I = reg[R14_UND].I;
reg[16].I = SPSR;
if(saveState)
reg[17].I = CPSR;
else
reg[17].I = reg[SPSR_UND].I;
break;
default:
systemMessage(MSG_UNSUPPORTED_ARM_MODE, N_("Unsupported ARM mode %02x"), mode);
break;
}
armMode = mode;
CPUUpdateFlags(breakLoop);
CPUUpdateCPSR();
}
void CPUSwitchMode(int mode, bool saveState)
{
CPUSwitchMode(mode, saveState, true);
}
void CPUUndefinedException()
{
u32 PC = reg[15].I;
bool savedArmState = armState;
CPUSwitchMode(0x1b, true, false);
reg[14].I = PC - (savedArmState ? 4 : 2);
reg[15].I = 0x04;
armState = true;
armIrqEnable = false;
armNextPC = 0x04;
ARM_PREFETCH;
reg[15].I += 4;
}
void CPUSoftwareInterrupt()
{
u32 PC = reg[15].I;
bool savedArmState = armState;
CPUSwitchMode(0x13, true, false);
reg[14].I = PC - (savedArmState ? 4 : 2);
reg[15].I = 0x08;
armState = true;
armIrqEnable = false;
armNextPC = 0x08;
ARM_PREFETCH;
reg[15].I += 4;
}
void CPUSoftwareInterrupt(int comment)
{
static bool disableMessage = false;
if(armState) comment >>= 16;
#ifdef BKPT_SUPPORT
if(comment == 0xff) {
dbgOutput(NULL, reg[0].I);
return;
}
#endif
#ifdef PROFILING
if(comment == 0xfe) {
profStartup(reg[0].I, reg[1].I);
return;
}
if(comment == 0xfd) {
profControl(reg[0].I);
return;
}
if(comment == 0xfc) {
profCleanup();
return;
}
if(comment == 0xfb) {
profCount();
return;
}
#endif
if(comment == 0xfa) {
agbPrintFlush();
return;
}
#ifdef SDL
if(comment == 0xf9) {
emulating = 0;
cpuNextEvent = cpuTotalTicks;
cpuBreakLoop = true;
return;
}
#endif
if(useBios) {
#ifdef GBA_LOGGING
if(systemVerbose & VERBOSE_SWI) {
log("SWI: %08x at %08x (0x%08x,0x%08x,0x%08x,VCOUNT = %2d)\n", comment,
armState ? armNextPC - 4: armNextPC -2,
reg[0].I,
reg[1].I,
reg[2].I,
VCOUNT);
}
#endif
CPUSoftwareInterrupt();
return;
}
// This would be correct, but it causes problems if uncommented
// else {
// biosProtected = 0xe3a02004;
// }
switch(comment) {
case 0x00:
BIOS_SoftReset();
ARM_PREFETCH;
break;
case 0x01:
BIOS_RegisterRamReset();
break;
case 0x02:
#ifdef GBA_LOGGING
if(systemVerbose & VERBOSE_SWI) {
log("Halt: (VCOUNT = %2d)\n",
VCOUNT);
}
#endif
holdState = true;
holdType = -1;
cpuNextEvent = cpuTotalTicks;
break;
case 0x03:
#ifdef GBA_LOGGING
if(systemVerbose & VERBOSE_SWI) {
log("Stop: (VCOUNT = %2d)\n",
VCOUNT);
}
#endif
holdState = true;
holdType = -1;
stopState = true;
cpuNextEvent = cpuTotalTicks;
break;
case 0x04:
#ifdef GBA_LOGGING
if(systemVerbose & VERBOSE_SWI) {
log("IntrWait: 0x%08x,0x%08x (VCOUNT = %2d)\n",
reg[0].I,
reg[1].I,
VCOUNT);
}
#endif
CPUSoftwareInterrupt();
break;
case 0x05:
#ifdef GBA_LOGGING
if(systemVerbose & VERBOSE_SWI) {
log("VBlankIntrWait: (VCOUNT = %2d)\n",
VCOUNT);
}
#endif
CPUSoftwareInterrupt();
break;
case 0x06:
CPUSoftwareInterrupt();
break;
case 0x07:
CPUSoftwareInterrupt();
break;
case 0x08:
BIOS_Sqrt();
break;
case 0x09:
BIOS_ArcTan();
break;
case 0x0A:
BIOS_ArcTan2();
break;
case 0x0B:
{
int len = (reg[2].I & 0x1FFFFF) >>1;
if (!(((reg[0].I & 0xe000000) == 0) ||
((reg[0].I + len) & 0xe000000) == 0))
{
if ((reg[2].I >> 24) & 1)
{
if ((reg[2].I >> 26) & 1)
SWITicks = (7 + memoryWait32[(reg[1].I>>24) & 0xF]) * (len>>1);
else
SWITicks = (8 + memoryWait[(reg[1].I>>24) & 0xF]) * (len);
}
else
{
if ((reg[2].I >> 26) & 1)
SWITicks = (10 + memoryWait32[(reg[0].I>>24) & 0xF] +
memoryWait32[(reg[1].I>>24) & 0xF]) * (len>>1);
else
SWITicks = (11 + memoryWait[(reg[0].I>>24) & 0xF] +
memoryWait[(reg[1].I>>24) & 0xF]) * len;
}
}
}
BIOS_CpuSet();
break;
case 0x0C:
{
int len = (reg[2].I & 0x1FFFFF) >>5;
if (!(((reg[0].I & 0xe000000) == 0) ||
((reg[0].I + len) & 0xe000000) == 0))
{
if ((reg[2].I >> 24) & 1)
SWITicks = (6 + memoryWait32[(reg[1].I>>24) & 0xF] +
7 * (memoryWaitSeq32[(reg[1].I>>24) & 0xF] + 1)) * len;
else
SWITicks = (9 + memoryWait32[(reg[0].I>>24) & 0xF] +
memoryWait32[(reg[1].I>>24) & 0xF] +
7 * (memoryWaitSeq32[(reg[0].I>>24) & 0xF] +
memoryWaitSeq32[(reg[1].I>>24) & 0xF] + 2)) * len;
}
}
BIOS_CpuFastSet();
break;
case 0x0D:
BIOS_GetBiosChecksum();
break;
case 0x0E:
BIOS_BgAffineSet();
break;
case 0x0F:
BIOS_ObjAffineSet();
break;
case 0x10:
{
int len = CPUReadHalfWord(reg[2].I);
if (!(((reg[0].I & 0xe000000) == 0) ||
((reg[0].I + len) & 0xe000000) == 0))
SWITicks = (32 + memoryWait[(reg[0].I>>24) & 0xF]) * len;
}
BIOS_BitUnPack();
break;
case 0x11:
{
u32 len = CPUReadMemory(reg[0].I) >> 8;
if(!(((reg[0].I & 0xe000000) == 0) ||
((reg[0].I + (len & 0x1fffff)) & 0xe000000) == 0))
SWITicks = (9 + memoryWait[(reg[1].I>>24) & 0xF]) * len;
}
BIOS_LZ77UnCompWram();
break;
case 0x12:
{
u32 len = CPUReadMemory(reg[0].I) >> 8;
if(!(((reg[0].I & 0xe000000) == 0) ||
((reg[0].I + (len & 0x1fffff)) & 0xe000000) == 0))
SWITicks = (19 + memoryWait[(reg[1].I>>24) & 0xF]) * len;
}
BIOS_LZ77UnCompVram();
break;
case 0x13:
{
u32 len = CPUReadMemory(reg[0].I) >> 8;
if(!(((reg[0].I & 0xe000000) == 0) ||
((reg[0].I + (len & 0x1fffff)) & 0xe000000) == 0))
SWITicks = (29 + (memoryWait[(reg[0].I>>24) & 0xF]<<1)) * len;
}
BIOS_HuffUnComp();
break;
case 0x14:
{
u32 len = CPUReadMemory(reg[0].I) >> 8;
if(!(((reg[0].I & 0xe000000) == 0) ||
((reg[0].I + (len & 0x1fffff)) & 0xe000000) == 0))
SWITicks = (11 + memoryWait[(reg[0].I>>24) & 0xF] +
memoryWait[(reg[1].I>>24) & 0xF]) * len;
}
BIOS_RLUnCompWram();
break;
case 0x15:
{
u32 len = CPUReadMemory(reg[0].I) >> 9;
if(!(((reg[0].I & 0xe000000) == 0) ||
((reg[0].I + (len & 0x1fffff)) & 0xe000000) == 0))
SWITicks = (34 + (memoryWait[(reg[0].I>>24) & 0xF] << 1) +
memoryWait[(reg[1].I>>24) & 0xF]) * len;
}
BIOS_RLUnCompVram();
break;
case 0x16:
{
u32 len = CPUReadMemory(reg[0].I) >> 8;
if(!(((reg[0].I & 0xe000000) == 0) ||
((reg[0].I + (len & 0x1fffff)) & 0xe000000) == 0))
SWITicks = (13 + memoryWait[(reg[0].I>>24) & 0xF] +
memoryWait[(reg[1].I>>24) & 0xF]) * len;
}
BIOS_Diff8bitUnFilterWram();
break;
case 0x17:
{
u32 len = CPUReadMemory(reg[0].I) >> 9;
if(!(((reg[0].I & 0xe000000) == 0) ||
((reg[0].I + (len & 0x1fffff)) & 0xe000000) == 0))
SWITicks = (39 + (memoryWait[(reg[0].I>>24) & 0xF]<<1) +
memoryWait[(reg[1].I>>24) & 0xF]) * len;
}
BIOS_Diff8bitUnFilterVram();
break;
case 0x18:
{
u32 len = CPUReadMemory(reg[0].I) >> 9;
if(!(((reg[0].I & 0xe000000) == 0) ||
((reg[0].I + (len & 0x1fffff)) & 0xe000000) == 0))
SWITicks = (13 + memoryWait[(reg[0].I>>24) & 0xF] +
memoryWait[(reg[1].I>>24) & 0xF]) * len;
}
BIOS_Diff16bitUnFilter();
break;
case 0x19:
#ifdef GBA_LOGGING
if(systemVerbose & VERBOSE_SWI) {
log("SoundBiasSet: 0x%08x (VCOUNT = %2d)\n",
reg[0].I,
VCOUNT);
}
#endif
if(reg[0].I)
update audio core to match VBA-M (BUG: static added to GBA sound!)
2009-01-10 09:03:58 +01:00
soundPause();
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
else
update audio core to match VBA-M (BUG: static added to GBA sound!)
2009-01-10 09:03:58 +01:00
soundResume();
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
break;
case 0x1F:
BIOS_MidiKey2Freq();
break;
case 0x2A:
BIOS_SndDriverJmpTableCopy();
// let it go, because we don't really emulate this function
default:
#ifdef GBA_LOGGING
if(systemVerbose & VERBOSE_SWI) {
log("SWI: %08x at %08x (0x%08x,0x%08x,0x%08x,VCOUNT = %2d)\n", comment,
armState ? armNextPC - 4: armNextPC -2,
reg[0].I,
reg[1].I,
reg[2].I,
VCOUNT);
}
#endif
if(!disableMessage) {
systemMessage(MSG_UNSUPPORTED_BIOS_FUNCTION,
N_("Unsupported BIOS function %02x called from %08x. A BIOS file is needed in order to get correct behaviour."),
comment,
armMode ? armNextPC - 4: armNextPC - 2);
disableMessage = true;
}
break;
}
}
void CPUCompareVCOUNT()
{
if(VCOUNT == (DISPSTAT >> 8)) {
DISPSTAT |= 4;
UPDATE_REG(0x04, DISPSTAT);
if(DISPSTAT & 0x20) {
IF |= 4;
UPDATE_REG(0x202, IF);
}
} else {
DISPSTAT &= 0xFFFB;
UPDATE_REG(0x4, DISPSTAT);
}
if (layerEnableDelay>0)
{
layerEnableDelay--;
if (layerEnableDelay==1)
layerEnable = layerSettings & DISPCNT;
}
}
void doDMA(u32 &s, u32 &d, u32 si, u32 di, u32 c, int transfer32)
{
int sm = s >> 24;
int dm = d >> 24;
int sw = 0;
int dw = 0;
int sc = c;
cpuDmaCount = c;
// This is done to get the correct waitstates.
if (sm>15)
sm=15;
if (dm>15)
dm=15;
//if ((sm>=0x05) && (sm<=0x07) || (dm>=0x05) && (dm <=0x07))
// blank = (((DISPSTAT | ((DISPSTAT>>1)&1))==1) ? true : false);
if(transfer32) {
s &= 0xFFFFFFFC;
if(s < 0x02000000 && (reg[15].I >> 24)) {
while(c != 0) {
CPUWriteMemory(d, 0);
d += di;
c--;
}
} else {
while(c != 0) {
cpuDmaLast = CPUReadMemory(s);
CPUWriteMemory(d, cpuDmaLast);
d += di;
s += si;
c--;
}
}
} else {
s &= 0xFFFFFFFE;
si = (int)si >> 1;
di = (int)di >> 1;
if(s < 0x02000000 && (reg[15].I >> 24)) {
while(c != 0) {
CPUWriteHalfWord(d, 0);
d += di;
c--;
}
} else {
while(c != 0) {
cpuDmaLast = CPUReadHalfWord(s);
CPUWriteHalfWord(d, cpuDmaLast);
cpuDmaLast |= (cpuDmaLast<<16);
d += di;
s += si;
c--;
}
}
}
cpuDmaCount = 0;
int totalTicks = 0;
if(transfer32) {
sw =1+memoryWaitSeq32[sm & 15];
dw =1+memoryWaitSeq32[dm & 15];
totalTicks = (sw+dw)*(sc-1) + 6 + memoryWait32[sm & 15] +
memoryWaitSeq32[dm & 15];
}
else
{
sw = 1+memoryWaitSeq[sm & 15];
dw = 1+memoryWaitSeq[dm & 15];
totalTicks = (sw+dw)*(sc-1) + 6 + memoryWait[sm & 15] +
memoryWaitSeq[dm & 15];
}
cpuDmaTicksToUpdate += totalTicks;
}
void CPUCheckDMA(int reason, int dmamask)
{
// DMA 0
if((DM0CNT_H & 0x8000) && (dmamask & 1)) {
if(((DM0CNT_H >> 12) & 3) == reason) {
u32 sourceIncrement = 4;
u32 destIncrement = 4;
switch((DM0CNT_H >> 7) & 3) {
case 0:
break;
case 1:
sourceIncrement = (u32)-4;
break;
case 2:
sourceIncrement = 0;
break;
}
switch((DM0CNT_H >> 5) & 3) {
case 0:
break;
case 1:
destIncrement = (u32)-4;
break;
case 2:
destIncrement = 0;
break;
}
#ifdef GBA_LOGGING
if(systemVerbose & VERBOSE_DMA0) {
int count = (DM0CNT_L ? DM0CNT_L : 0x4000) << 1;
if(DM0CNT_H & 0x0400)
count <<= 1;
log("DMA0: s=%08x d=%08x c=%04x count=%08x\n", dma0Source, dma0Dest,
DM0CNT_H,
count);
}
#endif
doDMA(dma0Source, dma0Dest, sourceIncrement, destIncrement,
DM0CNT_L ? DM0CNT_L : 0x4000,
DM0CNT_H & 0x0400);
cpuDmaHack = true;
if(DM0CNT_H & 0x4000) {
IF |= 0x0100;
UPDATE_REG(0x202, IF);
cpuNextEvent = cpuTotalTicks;
}
if(((DM0CNT_H >> 5) & 3) == 3) {
dma0Dest = DM0DAD_L | (DM0DAD_H << 16);
}
if(!(DM0CNT_H & 0x0200) || (reason == 0)) {
DM0CNT_H &= 0x7FFF;
UPDATE_REG(0xBA, DM0CNT_H);
}
}
}
// DMA 1
if((DM1CNT_H & 0x8000) && (dmamask & 2)) {
if(((DM1CNT_H >> 12) & 3) == reason) {
u32 sourceIncrement = 4;
u32 destIncrement = 4;
switch((DM1CNT_H >> 7) & 3) {
case 0:
break;
case 1:
sourceIncrement = (u32)-4;
break;
case 2:
sourceIncrement = 0;
break;
}
switch((DM1CNT_H >> 5) & 3) {
case 0:
break;
case 1:
destIncrement = (u32)-4;
break;
case 2:
destIncrement = 0;
break;
}
if(reason == 3) {
#ifdef GBA_LOGGING
if(systemVerbose & VERBOSE_DMA1) {
log("DMA1: s=%08x d=%08x c=%04x count=%08x\n", dma1Source, dma1Dest,
DM1CNT_H,
16);
}
#endif
doDMA(dma1Source, dma1Dest, sourceIncrement, 0, 4,
0x0400);
} else {
#ifdef GBA_LOGGING
if(systemVerbose & VERBOSE_DMA1) {
int count = (DM1CNT_L ? DM1CNT_L : 0x4000) << 1;
if(DM1CNT_H & 0x0400)
count <<= 1;
log("DMA1: s=%08x d=%08x c=%04x count=%08x\n", dma1Source, dma1Dest,
DM1CNT_H,
count);
}
#endif
doDMA(dma1Source, dma1Dest, sourceIncrement, destIncrement,
DM1CNT_L ? DM1CNT_L : 0x4000,
DM1CNT_H & 0x0400);
}
cpuDmaHack = true;
if(DM1CNT_H & 0x4000) {
IF |= 0x0200;
UPDATE_REG(0x202, IF);
cpuNextEvent = cpuTotalTicks;
}
if(((DM1CNT_H >> 5) & 3) == 3) {
dma1Dest = DM1DAD_L | (DM1DAD_H << 16);
}
if(!(DM1CNT_H & 0x0200) || (reason == 0)) {
DM1CNT_H &= 0x7FFF;
UPDATE_REG(0xC6, DM1CNT_H);
}
}
}
// DMA 2
if((DM2CNT_H & 0x8000) && (dmamask & 4)) {
if(((DM2CNT_H >> 12) & 3) == reason) {
u32 sourceIncrement = 4;
u32 destIncrement = 4;
switch((DM2CNT_H >> 7) & 3) {
case 0:
break;
case 1:
sourceIncrement = (u32)-4;
break;
case 2:
sourceIncrement = 0;
break;
}
switch((DM2CNT_H >> 5) & 3) {
case 0:
break;
case 1:
destIncrement = (u32)-4;
break;
case 2:
destIncrement = 0;
break;
}
if(reason == 3) {
#ifdef GBA_LOGGING
if(systemVerbose & VERBOSE_DMA2) {
int count = (4) << 2;
log("DMA2: s=%08x d=%08x c=%04x count=%08x\n", dma2Source, dma2Dest,
DM2CNT_H,
count);
}
#endif
doDMA(dma2Source, dma2Dest, sourceIncrement, 0, 4,
0x0400);
} else {
#ifdef GBA_LOGGING
if(systemVerbose & VERBOSE_DMA2) {
int count = (DM2CNT_L ? DM2CNT_L : 0x4000) << 1;
if(DM2CNT_H & 0x0400)
count <<= 1;
log("DMA2: s=%08x d=%08x c=%04x count=%08x\n", dma2Source, dma2Dest,
DM2CNT_H,
count);
}
#endif
doDMA(dma2Source, dma2Dest, sourceIncrement, destIncrement,
DM2CNT_L ? DM2CNT_L : 0x4000,
DM2CNT_H & 0x0400);
}
cpuDmaHack = true;
if(DM2CNT_H & 0x4000) {
IF |= 0x0400;
UPDATE_REG(0x202, IF);
cpuNextEvent = cpuTotalTicks;
}
if(((DM2CNT_H >> 5) & 3) == 3) {
dma2Dest = DM2DAD_L | (DM2DAD_H << 16);
}
if(!(DM2CNT_H & 0x0200) || (reason == 0)) {
DM2CNT_H &= 0x7FFF;
UPDATE_REG(0xD2, DM2CNT_H);
}
}
}
// DMA 3
if((DM3CNT_H & 0x8000) && (dmamask & 8)) {
if(((DM3CNT_H >> 12) & 3) == reason) {
u32 sourceIncrement = 4;
u32 destIncrement = 4;
switch((DM3CNT_H >> 7) & 3) {
case 0:
break;
case 1:
sourceIncrement = (u32)-4;
break;
case 2:
sourceIncrement = 0;
break;
}
switch((DM3CNT_H >> 5) & 3) {
case 0:
break;
case 1:
destIncrement = (u32)-4;
break;
case 2:
destIncrement = 0;
break;
}
#ifdef GBA_LOGGING
if(systemVerbose & VERBOSE_DMA3) {
int count = (DM3CNT_L ? DM3CNT_L : 0x10000) << 1;
if(DM3CNT_H & 0x0400)
count <<= 1;
log("DMA3: s=%08x d=%08x c=%04x count=%08x\n", dma3Source, dma3Dest,
DM3CNT_H,
count);
}
#endif
doDMA(dma3Source, dma3Dest, sourceIncrement, destIncrement,
DM3CNT_L ? DM3CNT_L : 0x10000,
DM3CNT_H & 0x0400);
if(DM3CNT_H & 0x4000) {
IF |= 0x0800;
UPDATE_REG(0x202, IF);
cpuNextEvent = cpuTotalTicks;
}
if(((DM3CNT_H >> 5) & 3) == 3) {
dma3Dest = DM3DAD_L | (DM3DAD_H << 16);
}
if(!(DM3CNT_H & 0x0200) || (reason == 0)) {
DM3CNT_H &= 0x7FFF;
UPDATE_REG(0xDE, DM3CNT_H);
}
}
}
}
void CPUUpdateRegister(u32 address, u16 value)
{
minor changes
2009-01-10 08:44:34 +01:00
switch(address)
{
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
case 0x00:
minor changes
2009-01-10 08:44:34 +01:00
{ // we need to place the following code in { } because we declare & initialize variables in a case statement
if((value & 7) > 5) {
// display modes above 0-5 are prohibited
DISPCNT = (value & 7);
}
bool change = (0 != ((DISPCNT ^ value) & 0x80));
bool changeBG = (0 != ((DISPCNT ^ value) & 0x0F00));
u16 changeBGon = ((~DISPCNT) & value) & 0x0F00; // these layers are being activated
DISPCNT = (value & 0xFFF7); // bit 3 can only be accessed by the BIOS to enable GBC mode
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
UPDATE_REG(0x00, DISPCNT);
minor changes
2009-01-10 08:44:34 +01:00
if(changeBGon) {
layerEnableDelay = 4;
layerEnable = layerSettings & value & (~changeBGon);
} else {
layerEnable = layerSettings & value;
// CPUUpdateTicks();
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
}
windowOn = (layerEnable & 0x6000) ? true : false;
if(change && !((value & 0x80))) {
if(!(DISPSTAT & 1)) {
lcdTicks = 1008;
// VCOUNT = 0;
// UPDATE_REG(0x06, VCOUNT);
DISPSTAT &= 0xFFFC;
UPDATE_REG(0x04, DISPSTAT);
CPUCompareVCOUNT();
}
// (*renderLine)();
}
CPUUpdateRender();
// we only care about changes in BG0-BG3
minor changes
2009-01-10 08:44:34 +01:00
if(changeBG) {
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
CPUUpdateRenderBuffers(false);
minor changes
2009-01-10 08:44:34 +01:00
}
break;
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
}
case 0x04:
DISPSTAT = (value & 0xFF38) | (DISPSTAT & 7);
UPDATE_REG(0x04, DISPSTAT);
break;
case 0x06:
// not writable
break;
case 0x08:
BG0CNT = (value & 0xDFCF);
UPDATE_REG(0x08, BG0CNT);
break;
case 0x0A:
BG1CNT = (value & 0xDFCF);
UPDATE_REG(0x0A, BG1CNT);
break;
case 0x0C:
BG2CNT = (value & 0xFFCF);
UPDATE_REG(0x0C, BG2CNT);
break;
case 0x0E:
BG3CNT = (value & 0xFFCF);
UPDATE_REG(0x0E, BG3CNT);
break;
case 0x10:
BG0HOFS = value & 511;
UPDATE_REG(0x10, BG0HOFS);
break;
case 0x12:
BG0VOFS = value & 511;
UPDATE_REG(0x12, BG0VOFS);
break;
case 0x14:
BG1HOFS = value & 511;
UPDATE_REG(0x14, BG1HOFS);
break;
case 0x16:
BG1VOFS = value & 511;
UPDATE_REG(0x16, BG1VOFS);
break;
case 0x18:
BG2HOFS = value & 511;
UPDATE_REG(0x18, BG2HOFS);
break;
case 0x1A:
BG2VOFS = value & 511;
UPDATE_REG(0x1A, BG2VOFS);
break;
case 0x1C:
BG3HOFS = value & 511;
UPDATE_REG(0x1C, BG3HOFS);
break;
case 0x1E:
BG3VOFS = value & 511;
UPDATE_REG(0x1E, BG3VOFS);
break;
case 0x20:
BG2PA = value;
UPDATE_REG(0x20, BG2PA);
break;
case 0x22:
BG2PB = value;
UPDATE_REG(0x22, BG2PB);
break;
case 0x24:
BG2PC = value;
UPDATE_REG(0x24, BG2PC);
break;
case 0x26:
BG2PD = value;
UPDATE_REG(0x26, BG2PD);
break;
case 0x28:
BG2X_L = value;
UPDATE_REG(0x28, BG2X_L);
gfxBG2Changed |= 1;
break;
case 0x2A:
BG2X_H = (value & 0xFFF);
UPDATE_REG(0x2A, BG2X_H);
gfxBG2Changed |= 1;
break;
case 0x2C:
BG2Y_L = value;
UPDATE_REG(0x2C, BG2Y_L);
gfxBG2Changed |= 2;
break;
case 0x2E:
BG2Y_H = value & 0xFFF;
UPDATE_REG(0x2E, BG2Y_H);
gfxBG2Changed |= 2;
break;
case 0x30:
BG3PA = value;
UPDATE_REG(0x30, BG3PA);
break;
case 0x32:
BG3PB = value;
UPDATE_REG(0x32, BG3PB);
break;
case 0x34:
BG3PC = value;
UPDATE_REG(0x34, BG3PC);
break;
case 0x36:
BG3PD = value;
UPDATE_REG(0x36, BG3PD);
break;
case 0x38:
BG3X_L = value;
UPDATE_REG(0x38, BG3X_L);
gfxBG3Changed |= 1;
break;
case 0x3A:
BG3X_H = value & 0xFFF;
UPDATE_REG(0x3A, BG3X_H);
gfxBG3Changed |= 1;
break;
case 0x3C:
BG3Y_L = value;
UPDATE_REG(0x3C, BG3Y_L);
gfxBG3Changed |= 2;
break;
case 0x3E:
BG3Y_H = value & 0xFFF;
UPDATE_REG(0x3E, BG3Y_H);
gfxBG3Changed |= 2;
break;
case 0x40:
WIN0H = value;
UPDATE_REG(0x40, WIN0H);
CPUUpdateWindow0();
break;
case 0x42:
WIN1H = value;
UPDATE_REG(0x42, WIN1H);
CPUUpdateWindow1();
break;
case 0x44:
WIN0V = value;
UPDATE_REG(0x44, WIN0V);
break;
case 0x46:
WIN1V = value;
UPDATE_REG(0x46, WIN1V);
break;
case 0x48:
WININ = value & 0x3F3F;
UPDATE_REG(0x48, WININ);
break;
case 0x4A:
WINOUT = value & 0x3F3F;
UPDATE_REG(0x4A, WINOUT);
break;
case 0x4C:
MOSAIC = value;
UPDATE_REG(0x4C, MOSAIC);
break;
case 0x50:
BLDMOD = value & 0x3FFF;
UPDATE_REG(0x50, BLDMOD);
fxOn = ((BLDMOD>>6)&3) != 0;
CPUUpdateRender();
break;
case 0x52:
COLEV = value & 0x1F1F;
UPDATE_REG(0x52, COLEV);
break;
case 0x54:
COLY = value & 0x1F;
UPDATE_REG(0x54, COLY);
break;
case 0x60:
case 0x62:
case 0x64:
case 0x68:
case 0x6c:
case 0x70:
case 0x72:
case 0x74:
case 0x78:
case 0x7c:
case 0x80:
case 0x84:
soundEvent(address&0xFF, (u8)(value & 0xFF));
soundEvent((address&0xFF)+1, (u8)(value>>8));
break;
case 0x82:
case 0x88:
case 0xa0:
case 0xa2:
case 0xa4:
case 0xa6:
case 0x90:
case 0x92:
case 0x94:
case 0x96:
case 0x98:
case 0x9a:
case 0x9c:
case 0x9e:
soundEvent(address&0xFF, value);
break;
case 0xB0:
DM0SAD_L = value;
UPDATE_REG(0xB0, DM0SAD_L);
break;
case 0xB2:
DM0SAD_H = value & 0x07FF;
UPDATE_REG(0xB2, DM0SAD_H);
break;
case 0xB4:
DM0DAD_L = value;
UPDATE_REG(0xB4, DM0DAD_L);
break;
case 0xB6:
DM0DAD_H = value & 0x07FF;
UPDATE_REG(0xB6, DM0DAD_H);
break;
case 0xB8:
DM0CNT_L = value & 0x3FFF;
UPDATE_REG(0xB8, 0);
break;
case 0xBA:
{
bool start = ((DM0CNT_H ^ value) & 0x8000) ? true : false;
value &= 0xF7E0;
DM0CNT_H = value;
UPDATE_REG(0xBA, DM0CNT_H);
if(start && (value & 0x8000)) {
dma0Source = DM0SAD_L | (DM0SAD_H << 16);
dma0Dest = DM0DAD_L | (DM0DAD_H << 16);
CPUCheckDMA(0, 1);
}
}
break;
case 0xBC:
DM1SAD_L = value;
UPDATE_REG(0xBC, DM1SAD_L);
break;
case 0xBE:
DM1SAD_H = value & 0x0FFF;
UPDATE_REG(0xBE, DM1SAD_H);
break;
case 0xC0:
DM1DAD_L = value;
UPDATE_REG(0xC0, DM1DAD_L);
break;
case 0xC2:
DM1DAD_H = value & 0x07FF;
UPDATE_REG(0xC2, DM1DAD_H);
break;
case 0xC4:
DM1CNT_L = value & 0x3FFF;
UPDATE_REG(0xC4, 0);
break;
case 0xC6:
{
bool start = ((DM1CNT_H ^ value) & 0x8000) ? true : false;
value &= 0xF7E0;
DM1CNT_H = value;
UPDATE_REG(0xC6, DM1CNT_H);
if(start && (value & 0x8000)) {
dma1Source = DM1SAD_L | (DM1SAD_H << 16);
dma1Dest = DM1DAD_L | (DM1DAD_H << 16);
CPUCheckDMA(0, 2);
}
}
break;
case 0xC8:
DM2SAD_L = value;
UPDATE_REG(0xC8, DM2SAD_L);
break;
case 0xCA:
DM2SAD_H = value & 0x0FFF;
UPDATE_REG(0xCA, DM2SAD_H);
break;
case 0xCC:
DM2DAD_L = value;
UPDATE_REG(0xCC, DM2DAD_L);
break;
case 0xCE:
DM2DAD_H = value & 0x07FF;
UPDATE_REG(0xCE, DM2DAD_H);
break;
case 0xD0:
DM2CNT_L = value & 0x3FFF;
UPDATE_REG(0xD0, 0);
break;
case 0xD2:
{
bool start = ((DM2CNT_H ^ value) & 0x8000) ? true : false;
value &= 0xF7E0;
DM2CNT_H = value;
UPDATE_REG(0xD2, DM2CNT_H);
if(start && (value & 0x8000)) {
dma2Source = DM2SAD_L | (DM2SAD_H << 16);
dma2Dest = DM2DAD_L | (DM2DAD_H << 16);
CPUCheckDMA(0, 4);
}
}
break;
case 0xD4:
DM3SAD_L = value;
UPDATE_REG(0xD4, DM3SAD_L);
break;
case 0xD6:
DM3SAD_H = value & 0x0FFF;
UPDATE_REG(0xD6, DM3SAD_H);
break;
case 0xD8:
DM3DAD_L = value;
UPDATE_REG(0xD8, DM3DAD_L);
break;
case 0xDA:
DM3DAD_H = value & 0x0FFF;
UPDATE_REG(0xDA, DM3DAD_H);
break;
case 0xDC:
DM3CNT_L = value;
UPDATE_REG(0xDC, 0);
break;
case 0xDE:
{
bool start = ((DM3CNT_H ^ value) & 0x8000) ? true : false;
value &= 0xFFE0;
DM3CNT_H = value;
UPDATE_REG(0xDE, DM3CNT_H);
if(start && (value & 0x8000)) {
dma3Source = DM3SAD_L | (DM3SAD_H << 16);
dma3Dest = DM3DAD_L | (DM3DAD_H << 16);
CPUCheckDMA(0,8);
}
}
break;
minor changes
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case 0x100:
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
timer0Reload = value;
minor changes
2009-01-10 08:44:34 +01:00
interp_rate();
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
break;
case 0x102:
timer0Value = value;
timerOnOffDelay|=1;
cpuNextEvent = cpuTotalTicks;
break;
case 0x104:
timer1Reload = value;
minor changes
2009-01-10 08:44:34 +01:00
interp_rate();
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
break;
case 0x106:
timer1Value = value;
timerOnOffDelay|=2;
cpuNextEvent = cpuTotalTicks;
break;
case 0x108:
timer2Reload = value;
break;
case 0x10A:
timer2Value = value;
timerOnOffDelay|=4;
cpuNextEvent = cpuTotalTicks;
break;
case 0x10C:
timer3Reload = value;
break;
case 0x10E:
timer3Value = value;
timerOnOffDelay|=8;
cpuNextEvent = cpuTotalTicks;
break;
case 0x128:
minor changes
2009-01-10 08:44:34 +01:00
#ifdef LINK_EMULATION
if (linkenable)
{
StartLink(value);
}
else
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
#endif
minor changes
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{
if(value & 0x80) {
value &= 0xff7f;
if(value & 1 && (value & 0x4000)) {
UPDATE_REG(0x12a, 0xFF);
IF |= 0x80;
UPDATE_REG(0x202, IF);
value &= 0x7f7f;
}
}
UPDATE_REG(0x128, value);
}
break;
case 0x12a:
#ifdef LINK_EMULATION
if(linkenable && lspeed)
LinkSSend(value);
#endif
{
UPDATE_REG(0x134, value);
}
break;
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
case 0x130:
P1 |= (value & 0x3FF);
UPDATE_REG(0x130, P1);
break;
case 0x132:
UPDATE_REG(0x132, value & 0xC3FF);
break;
case 0x134:
#ifdef LINK_EMULATION
minor changes
2009-01-10 08:44:34 +01:00
if (linkenable)
StartGPLink(value);
else
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
#endif
minor changes
2009-01-10 08:44:34 +01:00
UPDATE_REG(0x134, value);
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
minor changes
2009-01-10 08:44:34 +01:00
break;
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
case 0x140:
#ifdef LINK_EMULATION
minor changes
2009-01-10 08:44:34 +01:00
if (linkenable)
StartJOYLink(value);
else
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
#endif
minor changes
2009-01-10 08:44:34 +01:00
UPDATE_REG(0x140, value);
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
minor changes
2009-01-10 08:44:34 +01:00
break;
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
case 0x200:
IE = value & 0x3FFF;
UPDATE_REG(0x200, IE);
if ((IME & 1) && (IF & IE) && armIrqEnable)
cpuNextEvent = cpuTotalTicks;
break;
case 0x202:
IF ^= (value & IF);
UPDATE_REG(0x202, IF);
break;
case 0x204:
{
memoryWait[0x0e] = memoryWaitSeq[0x0e] = gamepakRamWaitState[value & 3];
if(!speedHack) {
memoryWait[0x08] = memoryWait[0x09] = gamepakWaitState[(value >> 2) & 3];
memoryWaitSeq[0x08] = memoryWaitSeq[0x09] =
gamepakWaitState0[(value >> 4) & 1];
memoryWait[0x0a] = memoryWait[0x0b] = gamepakWaitState[(value >> 5) & 3];
memoryWaitSeq[0x0a] = memoryWaitSeq[0x0b] =
gamepakWaitState1[(value >> 7) & 1];
memoryWait[0x0c] = memoryWait[0x0d] = gamepakWaitState[(value >> 8) & 3];
memoryWaitSeq[0x0c] = memoryWaitSeq[0x0d] =
gamepakWaitState2[(value >> 10) & 1];
} else {
memoryWait[0x08] = memoryWait[0x09] = 3;
memoryWaitSeq[0x08] = memoryWaitSeq[0x09] = 1;
memoryWait[0x0a] = memoryWait[0x0b] = 3;
memoryWaitSeq[0x0a] = memoryWaitSeq[0x0b] = 1;
memoryWait[0x0c] = memoryWait[0x0d] = 3;
memoryWaitSeq[0x0c] = memoryWaitSeq[0x0d] = 1;
}
for(int i = 8; i < 15; i++) {
memoryWait32[i] = memoryWait[i] + memoryWaitSeq[i] + 1;
memoryWaitSeq32[i] = memoryWaitSeq[i]*2 + 1;
}
if((value & 0x4000) == 0x4000) {
busPrefetchEnable = true;
busPrefetch = false;
busPrefetchCount = 0;
} else {
busPrefetchEnable = false;
busPrefetch = false;
busPrefetchCount = 0;
}
UPDATE_REG(0x204, value & 0x7FFF);
}
break;
case 0x208:
IME = value & 1;
UPDATE_REG(0x208, IME);
if ((IME & 1) && (IF & IE) && armIrqEnable)
cpuNextEvent = cpuTotalTicks;
break;
case 0x300:
if(value != 0)
value &= 0xFFFE;
UPDATE_REG(0x300, value);
break;
default:
UPDATE_REG(address&0x3FE, value);
break;
}
}
void applyTimer ()
{
if (timerOnOffDelay & 1)
{
timer0ClockReload = TIMER_TICKS[timer0Value & 3];
if(!timer0On && (timer0Value & 0x80)) {
// reload the counter
TM0D = timer0Reload;
timer0Ticks = (0x10000 - TM0D) << timer0ClockReload;
UPDATE_REG(0x100, TM0D);
}
timer0On = timer0Value & 0x80 ? true : false;
TM0CNT = timer0Value & 0xC7;
minor changes
2009-01-10 08:44:34 +01:00
interp_rate();
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
UPDATE_REG(0x102, TM0CNT);
// CPUUpdateTicks();
}
if (timerOnOffDelay & 2)
{
timer1ClockReload = TIMER_TICKS[timer1Value & 3];
if(!timer1On && (timer1Value & 0x80)) {
// reload the counter
TM1D = timer1Reload;
timer1Ticks = (0x10000 - TM1D) << timer1ClockReload;
UPDATE_REG(0x104, TM1D);
}
timer1On = timer1Value & 0x80 ? true : false;
TM1CNT = timer1Value & 0xC7;
minor changes
2009-01-10 08:44:34 +01:00
interp_rate();
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
UPDATE_REG(0x106, TM1CNT);
}
if (timerOnOffDelay & 4)
{
timer2ClockReload = TIMER_TICKS[timer2Value & 3];
if(!timer2On && (timer2Value & 0x80)) {
// reload the counter
TM2D = timer2Reload;
timer2Ticks = (0x10000 - TM2D) << timer2ClockReload;
UPDATE_REG(0x108, TM2D);
}
timer2On = timer2Value & 0x80 ? true : false;
TM2CNT = timer2Value & 0xC7;
UPDATE_REG(0x10A, TM2CNT);
}
if (timerOnOffDelay & 8)
{
timer3ClockReload = TIMER_TICKS[timer3Value & 3];
if(!timer3On && (timer3Value & 0x80)) {
// reload the counter
TM3D = timer3Reload;
timer3Ticks = (0x10000 - TM3D) << timer3ClockReload;
UPDATE_REG(0x10C, TM3D);
}
timer3On = timer3Value & 0x80 ? true : false;
TM3CNT = timer3Value & 0xC7;
UPDATE_REG(0x10E, TM3CNT);
}
cpuNextEvent = CPUUpdateTicks();
timerOnOffDelay = 0;
}
u8 cpuBitsSet[256];
u8 cpuLowestBitSet[256];
void CPUInit(const char *biosFileName, bool useBiosFile)
{
#ifdef WORDS_BIGENDIAN
if(!cpuBiosSwapped) {
for(unsigned int i = 0; i < sizeof(myROM)/4; i++) {
WRITE32LE(&myROM[i], myROM[i]);
}
cpuBiosSwapped = true;
}
#endif
gbaSaveType = 0;
eepromInUse = 0;
saveType = 0;
useBios = false;
if(useBiosFile) {
int size = 0x4000;
if(utilLoad(biosFileName,
CPUIsGBABios,
bios,
size)) {
if(size == 0x4000)
useBios = true;
else
systemMessage(MSG_INVALID_BIOS_FILE_SIZE, N_("Invalid BIOS file size"));
}
}
if(!useBios) {
memcpy(bios, myROM, sizeof(myROM));
}
int i = 0;
biosProtected[0] = 0x00;
biosProtected[1] = 0xf0;
biosProtected[2] = 0x29;
biosProtected[3] = 0xe1;
for(i = 0; i < 256; i++) {
int count = 0;
int j;
for(j = 0; j < 8; j++)
if(i & (1 << j))
count++;
cpuBitsSet[i] = count;
for(j = 0; j < 8; j++)
if(i & (1 << j))
break;
cpuLowestBitSet[i] = j;
}
for(i = 0; i < 0x400; i++)
ioReadable[i] = true;
for(i = 0x10; i < 0x48; i++)
ioReadable[i] = false;
for(i = 0x4c; i < 0x50; i++)
ioReadable[i] = false;
for(i = 0x54; i < 0x60; i++)
ioReadable[i] = false;
for(i = 0x8c; i < 0x90; i++)
ioReadable[i] = false;
for(i = 0xa0; i < 0xb8; i++)
ioReadable[i] = false;
for(i = 0xbc; i < 0xc4; i++)
ioReadable[i] = false;
for(i = 0xc8; i < 0xd0; i++)
ioReadable[i] = false;
for(i = 0xd4; i < 0xdc; i++)
ioReadable[i] = false;
for(i = 0xe0; i < 0x100; i++)
ioReadable[i] = false;
for(i = 0x110; i < 0x120; i++)
ioReadable[i] = false;
for(i = 0x12c; i < 0x130; i++)
ioReadable[i] = false;
for(i = 0x138; i < 0x140; i++)
ioReadable[i] = false;
for(i = 0x144; i < 0x150; i++)
ioReadable[i] = false;
for(i = 0x15c; i < 0x200; i++)
ioReadable[i] = false;
for(i = 0x20c; i < 0x300; i++)
ioReadable[i] = false;
for(i = 0x304; i < 0x400; i++)
ioReadable[i] = false;
if(romSize < 0x1fe2000) {
*((u16 *)&rom[0x1fe209c]) = 0xdffa; // SWI 0xFA
*((u16 *)&rom[0x1fe209e]) = 0x4770; // BX LR
} else {
agbPrintEnable(false);
}
}
void CPUReset()
{
if(gbaSaveType == 0) {
if(eepromInUse)
gbaSaveType = 3;
else
switch(saveType) {
case 1:
gbaSaveType = 1;
break;
case 2:
gbaSaveType = 2;
break;
}
}
rtcReset();
// clean registers
memset(&reg[0], 0, sizeof(reg));
// clean OAM
memset(oam, 0, 0x400);
// clean palette
memset(paletteRAM, 0, 0x400);
// clean picture
memset(pix, 0, 4*160*240);
// clean vram
memset(vram, 0, 0x20000);
// clean io memory
memset(ioMem, 0, 0x400);
DISPCNT = 0x0080;
DISPSTAT = 0x0000;
VCOUNT = (useBios && !skipBios) ? 0 :0x007E;
BG0CNT = 0x0000;
BG1CNT = 0x0000;
BG2CNT = 0x0000;
BG3CNT = 0x0000;
BG0HOFS = 0x0000;
BG0VOFS = 0x0000;
BG1HOFS = 0x0000;
BG1VOFS = 0x0000;
BG2HOFS = 0x0000;
BG2VOFS = 0x0000;
BG3HOFS = 0x0000;
BG3VOFS = 0x0000;
BG2PA = 0x0100;
BG2PB = 0x0000;
BG2PC = 0x0000;
BG2PD = 0x0100;
BG2X_L = 0x0000;
BG2X_H = 0x0000;
BG2Y_L = 0x0000;
BG2Y_H = 0x0000;
BG3PA = 0x0100;
BG3PB = 0x0000;
BG3PC = 0x0000;
BG3PD = 0x0100;
BG3X_L = 0x0000;
BG3X_H = 0x0000;
BG3Y_L = 0x0000;
BG3Y_H = 0x0000;
WIN0H = 0x0000;
WIN1H = 0x0000;
WIN0V = 0x0000;
WIN1V = 0x0000;
WININ = 0x0000;
WINOUT = 0x0000;
MOSAIC = 0x0000;
BLDMOD = 0x0000;
COLEV = 0x0000;
COLY = 0x0000;
DM0SAD_L = 0x0000;
DM0SAD_H = 0x0000;
DM0DAD_L = 0x0000;
DM0DAD_H = 0x0000;
DM0CNT_L = 0x0000;
DM0CNT_H = 0x0000;
DM1SAD_L = 0x0000;
DM1SAD_H = 0x0000;
DM1DAD_L = 0x0000;
DM1DAD_H = 0x0000;
DM1CNT_L = 0x0000;
DM1CNT_H = 0x0000;
DM2SAD_L = 0x0000;
DM2SAD_H = 0x0000;
DM2DAD_L = 0x0000;
DM2DAD_H = 0x0000;
DM2CNT_L = 0x0000;
DM2CNT_H = 0x0000;
DM3SAD_L = 0x0000;
DM3SAD_H = 0x0000;
DM3DAD_L = 0x0000;
DM3DAD_H = 0x0000;
DM3CNT_L = 0x0000;
DM3CNT_H = 0x0000;
TM0D = 0x0000;
TM0CNT = 0x0000;
TM1D = 0x0000;
TM1CNT = 0x0000;
TM2D = 0x0000;
TM2CNT = 0x0000;
TM3D = 0x0000;
TM3CNT = 0x0000;
P1 = 0x03FF;
IE = 0x0000;
IF = 0x0000;
IME = 0x0000;
armMode = 0x1F;
if(cpuIsMultiBoot) {
reg[13].I = 0x03007F00;
reg[15].I = 0x02000000;
reg[16].I = 0x00000000;
reg[R13_IRQ].I = 0x03007FA0;
reg[R13_SVC].I = 0x03007FE0;
armIrqEnable = true;
} else {
if(useBios && !skipBios) {
reg[15].I = 0x00000000;
armMode = 0x13;
armIrqEnable = false;
} else {
reg[13].I = 0x03007F00;
reg[15].I = 0x08000000;
reg[16].I = 0x00000000;
reg[R13_IRQ].I = 0x03007FA0;
reg[R13_SVC].I = 0x03007FE0;
armIrqEnable = true;
}
}
armState = true;
C_FLAG = V_FLAG = N_FLAG = Z_FLAG = false;
UPDATE_REG(0x00, DISPCNT);
UPDATE_REG(0x06, VCOUNT);
UPDATE_REG(0x20, BG2PA);
UPDATE_REG(0x26, BG2PD);
UPDATE_REG(0x30, BG3PA);
UPDATE_REG(0x36, BG3PD);
UPDATE_REG(0x130, P1);
UPDATE_REG(0x88, 0x200);
// disable FIQ
reg[16].I |= 0x40;
CPUUpdateCPSR();
armNextPC = reg[15].I;
reg[15].I += 4;
// reset internal state
holdState = false;
holdType = 0;
biosProtected[0] = 0x00;
biosProtected[1] = 0xf0;
biosProtected[2] = 0x29;
biosProtected[3] = 0xe1;
lcdTicks = (useBios && !skipBios) ? 1008 : 208;
timer0On = false;
timer0Ticks = 0;
timer0Reload = 0;
timer0ClockReload = 0;
timer1On = false;
timer1Ticks = 0;
timer1Reload = 0;
timer1ClockReload = 0;
timer2On = false;
timer2Ticks = 0;
timer2Reload = 0;
timer2ClockReload = 0;
timer3On = false;
timer3Ticks = 0;
timer3Reload = 0;
timer3ClockReload = 0;
dma0Source = 0;
dma0Dest = 0;
dma1Source = 0;
dma1Dest = 0;
dma2Source = 0;
dma2Dest = 0;
dma3Source = 0;
dma3Dest = 0;
cpuSaveGameFunc = flashSaveDecide;
renderLine = mode0RenderLine;
fxOn = false;
windowOn = false;
frameCount = 0;
saveType = 0;
layerEnable = DISPCNT & layerSettings;
CPUUpdateRenderBuffers(true);
for(int i = 0; i < 256; i++) {
map[i].address = (u8 *)&dummyAddress;
map[i].mask = 0;
}
map[0].address = bios;
map[0].mask = 0x3FFF;
map[2].address = workRAM;
map[2].mask = 0x3FFFF;
map[3].address = internalRAM;
map[3].mask = 0x7FFF;
map[4].address = ioMem;
map[4].mask = 0x3FF;
map[5].address = paletteRAM;
map[5].mask = 0x3FF;
map[6].address = vram;
map[6].mask = 0x1FFFF;
map[7].address = oam;
map[7].mask = 0x3FF;
map[8].address = rom;
map[8].mask = 0x1FFFFFF;
map[9].address = rom;
map[9].mask = 0x1FFFFFF;
map[10].address = rom;
map[10].mask = 0x1FFFFFF;
map[12].address = rom;
map[12].mask = 0x1FFFFFF;
map[14].address = flashSaveMemory;
map[14].mask = 0xFFFF;
eepromReset();
flashReset();
soundReset();
CPUUpdateWindow0();
CPUUpdateWindow1();
// make sure registers are correctly initialized if not using BIOS
if(!useBios) {
if(cpuIsMultiBoot)
BIOS_RegisterRamReset(0xfe);
else
BIOS_RegisterRamReset(0xff);
} else {
if(cpuIsMultiBoot)
BIOS_RegisterRamReset(0xfe);
}
switch(cpuSaveType) {
case 0: // automatic
cpuSramEnabled = true;
cpuFlashEnabled = true;
cpuEEPROMEnabled = true;
cpuEEPROMSensorEnabled = false;
saveType = gbaSaveType = 0;
break;
case 1: // EEPROM
cpuSramEnabled = false;
cpuFlashEnabled = false;
cpuEEPROMEnabled = true;
cpuEEPROMSensorEnabled = false;
saveType = gbaSaveType = 3;
// EEPROM usage is automatically detected
break;
case 2: // SRAM
cpuSramEnabled = true;
cpuFlashEnabled = false;
cpuEEPROMEnabled = false;
cpuEEPROMSensorEnabled = false;
cpuSaveGameFunc = sramDelayedWrite; // to insure we detect the write
saveType = gbaSaveType = 1;
break;
case 3: // FLASH
cpuSramEnabled = false;
cpuFlashEnabled = true;
cpuEEPROMEnabled = false;
cpuEEPROMSensorEnabled = false;
cpuSaveGameFunc = flashDelayedWrite; // to insure we detect the write
saveType = gbaSaveType = 2;
break;
case 4: // EEPROM+Sensor
cpuSramEnabled = false;
cpuFlashEnabled = false;
cpuEEPROMEnabled = true;
cpuEEPROMSensorEnabled = true;
// EEPROM usage is automatically detected
saveType = gbaSaveType = 3;
break;
case 5: // NONE
cpuSramEnabled = false;
cpuFlashEnabled = false;
cpuEEPROMEnabled = false;
cpuEEPROMSensorEnabled = false;
// no save at all
saveType = gbaSaveType = 5;
break;
}
ARM_PREFETCH;
systemSaveUpdateCounter = SYSTEM_SAVE_NOT_UPDATED;
cpuDmaHack = false;
update video, activate part of PPC core
2008-10-11 00:33:57 +02:00
//lastTime = systemGetClock();
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
SWITicks = 0;
}
void CPUInterrupt()
{
u32 PC = reg[15].I;
bool savedState = armState;
CPUSwitchMode(0x12, true, false);
reg[14].I = PC;
if(!savedState)
reg[14].I += 2;
reg[15].I = 0x18;
armState = true;
armIrqEnable = false;
armNextPC = reg[15].I;
reg[15].I += 4;
ARM_PREFETCH;
// if(!holdState)
biosProtected[0] = 0x02;
biosProtected[1] = 0xc0;
biosProtected[2] = 0x5e;
biosProtected[3] = 0xe5;
}
#ifdef SDL
void log(const char *defaultMsg, ...)
{
char buffer[2048];
va_list valist;
va_start(valist, defaultMsg);
vsprintf(buffer, defaultMsg, valist);
if(out == NULL) {
out = fopen("trace.log","w");
}
fputs(buffer, out);
va_end(valist);
}
#else
extern void winlog(const char *, ...);
#endif
void CPULoop(int ticks)
{
int clockTicks;
int timerOverflow = 0;
// variable used by the CPU core
cpuTotalTicks = 0;
#ifdef LINK_EMULATION
if(linkenable)
cpuNextEvent = 1;
#endif
cpuBreakLoop = false;
cpuNextEvent = CPUUpdateTicks();
if(cpuNextEvent > ticks)
cpuNextEvent = ticks;
for(;;) {
#ifndef FINAL_VERSION
if(systemDebug) {
if(systemDebug >= 10 && !holdState) {
CPUUpdateCPSR();
#ifdef BKPT_SUPPORT
if (debugger_last)
{
sprintf(buffer, "R00=%08x R01=%08x R02=%08x R03=%08x R04=%08x R05=%08x R06=%08x R07=%08x R08=%08x R09=%08x R10=%08x R11=%08x R12=%08x R13=%08x R14=%08x R15=%08x R16=%08x R17=%08x\n",
oldreg[0], oldreg[1], oldreg[2], oldreg[3], oldreg[4], oldreg[5],
oldreg[6], oldreg[7], oldreg[8], oldreg[9], oldreg[10], oldreg[11],
oldreg[12], oldreg[13], oldreg[14], oldreg[15], oldreg[16],
oldreg[17]);
}
#endif
sprintf(buffer, "R00=%08x R01=%08x R02=%08x R03=%08x R04=%08x R05=%08x R06=%08x R07=%08x R08=%08x R09=%08x R10=%08x R11=%08x R12=%08x R13=%08x R14=%08x R15=%08x R16=%08x R17=%08x\n",
reg[0].I, reg[1].I, reg[2].I, reg[3].I, reg[4].I, reg[5].I,
reg[6].I, reg[7].I, reg[8].I, reg[9].I, reg[10].I, reg[11].I,
reg[12].I, reg[13].I, reg[14].I, reg[15].I, reg[16].I,
reg[17].I);
#ifdef SDL
log(buffer);
#else
winlog(buffer);
#endif
} else if(!holdState) {
sprintf(buffer, "PC=%08x\n", armNextPC);
#ifdef SDL
log(buffer);
#else
winlog(buffer);
#endif
}
}
#endif /* FINAL_VERSION */
if(!holdState && !SWITicks) {
if(armState) {
if (!armExecute())
return;
} else {
if (!thumbExecute())
return;
}
clockTicks = 0;
} else
clockTicks = CPUUpdateTicks();
cpuTotalTicks += clockTicks;
if(cpuTotalTicks >= cpuNextEvent) {
int remainingTicks = cpuTotalTicks - cpuNextEvent;
if (SWITicks)
{
SWITicks-=clockTicks;
if (SWITicks<0)
SWITicks = 0;
}
clockTicks = cpuNextEvent;
cpuTotalTicks = 0;
cpuDmaHack = false;
updateLoop:
if (IRQTicks)
{
IRQTicks -= clockTicks;
if (IRQTicks<0)
IRQTicks = 0;
}
lcdTicks -= clockTicks;
if(lcdTicks <= 0) {
if(DISPSTAT & 1) { // V-BLANK
// if in V-Blank mode, keep computing...
if(DISPSTAT & 2) {
lcdTicks += 1008;
VCOUNT++;
UPDATE_REG(0x06, VCOUNT);
DISPSTAT &= 0xFFFD;
UPDATE_REG(0x04, DISPSTAT);
CPUCompareVCOUNT();
} else {
lcdTicks += 224;
DISPSTAT |= 2;
UPDATE_REG(0x04, DISPSTAT);
if(DISPSTAT & 16) {
IF |= 2;
UPDATE_REG(0x202, IF);
}
}
if(VCOUNT >= 228) { //Reaching last line
DISPSTAT &= 0xFFFC;
UPDATE_REG(0x04, DISPSTAT);
VCOUNT = 0;
UPDATE_REG(0x06, VCOUNT);
CPUCompareVCOUNT();
}
} else {
int framesToSkip = systemFrameSkip;
if(speedup)
framesToSkip = 9; // try 6 FPS during speedup
if(DISPSTAT & 2) {
// if in H-Blank, leave it and move to drawing mode
VCOUNT++;
UPDATE_REG(0x06, VCOUNT);
lcdTicks += 1008;
DISPSTAT &= 0xFFFD;
if(VCOUNT == 160) {
count++;
systemFrame();
if((count % 10) == 0) {
system10Frames(60);
}
if(count == 60) {
update video, activate part of PPC core
2008-10-11 00:33:57 +02:00
/*u32 time = systemGetClock();
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
if(time != lastTime) {
u32 t = 100000/(time - lastTime);
systemShowSpeed(t);
} else
systemShowSpeed(0);
update video, activate part of PPC core
2008-10-11 00:33:57 +02:00
lastTime = time;*/
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
count = 0;
}
u32 joy = 0;
// update joystick information
if(systemReadJoypads())
// read default joystick
joy = systemReadJoypad(-1);
P1 = 0x03FF ^ (joy & 0x3FF);
if(cpuEEPROMSensorEnabled)
systemUpdateMotionSensor();
UPDATE_REG(0x130, P1);
u16 P1CNT = READ16LE(((u16 *)&ioMem[0x132]));
// this seems wrong, but there are cases where the game
// can enter the stop state without requesting an IRQ from
// the joypad.
if((P1CNT & 0x4000) || stopState) {
u16 p1 = (0x3FF ^ P1) & 0x3FF;
if(P1CNT & 0x8000) {
if(p1 == (P1CNT & 0x3FF)) {
IF |= 0x1000;
UPDATE_REG(0x202, IF);
}
} else {
if(p1 & P1CNT) {
IF |= 0x1000;
UPDATE_REG(0x202, IF);
}
}
}
u32 ext = (joy >> 10);
// If no (m) code is enabled, apply the cheats at each LCDline
if((cheatsEnabled) && (mastercode==0))
remainingTicks += cheatsCheckKeys(P1^0x3FF, ext);
speedup = (ext & 1) ? true : false;
capture = (ext & 2) ? true : false;
if(capture && !capturePrevious) {
captureNumber++;
systemScreenCapture(captureNumber);
}
capturePrevious = capture;
DISPSTAT |= 1;
DISPSTAT &= 0xFFFD;
UPDATE_REG(0x04, DISPSTAT);
if(DISPSTAT & 0x0008) {
IF |= 1;
UPDATE_REG(0x202, IF);
}
CPUCheckDMA(1, 0x0f);
if(frameCount >= framesToSkip) {
systemDrawScreen();
frameCount = 0;
} else
frameCount++;
if(systemPauseOnFrame())
ticks = 0;
}
UPDATE_REG(0x04, DISPSTAT);
CPUCompareVCOUNT();
} else {
if(frameCount >= framesToSkip)
{
(*renderLine)();
switch(systemColorDepth) {
case 16:
{
u16 *dest = (u16 *)pix + 242 * (VCOUNT+1);
minor changes
2009-01-10 08:44:34 +01:00
for(int x = 0; x < 240;) {
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
*dest++ = systemColorMap16[lineMix[x++]&0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
}
// for filters that read past the screen
minor changes
2009-01-10 08:44:34 +01:00
*dest++ = 0;
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
}
break;
case 24:
{
u8 *dest = (u8 *)pix + 240 * VCOUNT * 3;
minor changes
2009-01-10 08:44:34 +01:00
for(int x = 0; x < 240;) {
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
minor changes
2009-01-10 08:44:34 +01:00
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
minor changes
2009-01-10 08:44:34 +01:00
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
minor changes
2009-01-10 08:44:34 +01:00
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
minor changes
2009-01-10 08:44:34 +01:00
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
minor changes
2009-01-10 08:44:34 +01:00
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
minor changes
2009-01-10 08:44:34 +01:00
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
minor changes
2009-01-10 08:44:34 +01:00
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
minor changes
2009-01-10 08:44:34 +01:00
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
minor changes
2009-01-10 08:44:34 +01:00
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
minor changes
2009-01-10 08:44:34 +01:00
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
minor changes
2009-01-10 08:44:34 +01:00
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
minor changes
2009-01-10 08:44:34 +01:00
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
dest += 3;
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
minor changes
2009-01-10 08:44:34 +01:00
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
minor changes
2009-01-10 08:44:34 +01:00
*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
dest += 3;
}
}
break;
case 32:
{
u32 *dest = (u32 *)pix + 241 * (VCOUNT+1);
minor changes
2009-01-10 08:44:34 +01:00
for(int x = 0; x < 240; ) {
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
}
}
break;
}
}
// entering H-Blank
DISPSTAT |= 2;
UPDATE_REG(0x04, DISPSTAT);
lcdTicks += 224;
CPUCheckDMA(2, 0x0f);
if(DISPSTAT & 16) {
IF |= 2;
UPDATE_REG(0x202, IF);
}
}
}
}
// we shouldn't be doing sound in stop state, but we loose synchronization
// if sound is disabled, so in stop state, soundTick will just produce
// mute sound
soundTicks -= clockTicks;
if(soundTicks <= 0) {
upgrade sound core and GB engine
2008-10-18 08:49:04 +02:00
psoundTickfn();
upgrade core, fix frameskipping bug
2008-09-23 01:00:10 +02:00
soundTicks += SOUND_CLOCK_TICKS;
}
if(!stopState) {
if(timer0On) {
timer0Ticks -= clockTicks;
if(timer0Ticks <= 0) {
timer0Ticks += (0x10000 - timer0Reload) << timer0ClockReload;
timerOverflow |= 1;
soundTimerOverflow(0);
if(TM0CNT & 0x40) {
IF |= 0x08;
UPDATE_REG(0x202, IF);
}
}
TM0D = 0xFFFF - (timer0Ticks >> timer0ClockReload);
UPDATE_REG(0x100, TM0D);
}
if(timer1On) {
if(TM1CNT & 4) {
if(timerOverflow & 1) {
TM1D++;
if(TM1D == 0) {
TM1D += timer1Reload;
timerOverflow |= 2;
soundTimerOverflow(1);
if(TM1CNT & 0x40) {
IF |= 0x10;
UPDATE_REG(0x202, IF);
}
}
UPDATE_REG(0x104, TM1D);
}
} else {
timer1Ticks -= clockTicks;
if(timer1Ticks <= 0) {
timer1Ticks += (0x10000 - timer1Reload) << timer1ClockReload;
timerOverflow |= 2;
soundTimerOverflow(1);
if(TM1CNT & 0x40) {
IF |= 0x10;
UPDATE_REG(0x202, IF);
}
}
TM1D = 0xFFFF - (timer1Ticks >> timer1ClockReload);
UPDATE_REG(0x104, TM1D);
}
}
if(timer2On) {
if(TM2CNT & 4) {
if(timerOverflow & 2) {
TM2D++;
if(TM2D == 0) {
TM2D += timer2Reload;
timerOverflow |= 4;
if(TM2CNT & 0x40) {
IF |= 0x20;
UPDATE_REG(0x202, IF);
}
}
UPDATE_REG(0x108, TM2D);
}
} else {
timer2Ticks -= clockTicks;
if(timer2Ticks <= 0) {
timer2Ticks += (0x10000 - timer2Reload) << timer2ClockReload;
timerOverflow |= 4;
if(TM2CNT & 0x40) {
IF |= 0x20;
UPDATE_REG(0x202, IF);
}
}
TM2D = 0xFFFF - (timer2Ticks >> timer2ClockReload);
UPDATE_REG(0x108, TM2D);
}
}
if(timer3On) {
if(TM3CNT & 4) {
if(timerOverflow & 4) {
TM3D++;
if(TM3D == 0) {
TM3D += timer3Reload;
if(TM3CNT & 0x40) {
IF |= 0x40;
UPDATE_REG(0x202, IF);
}
}
UPDATE_REG(0x10C, TM3D);
}
} else {
timer3Ticks -= clockTicks;
if(timer3Ticks <= 0) {
timer3Ticks += (0x10000 - timer3Reload) << timer3ClockReload;
if(TM3CNT & 0x40) {
IF |= 0x40;
UPDATE_REG(0x202, IF);
}
}
TM3D = 0xFFFF - (timer3Ticks >> timer3ClockReload);
UPDATE_REG(0x10C, TM3D);
}
}
}
timerOverflow = 0;
#ifdef PROFILING
profilingTicks -= clockTicks;
if(profilingTicks <= 0) {
profilingTicks += profilingTicksReload;
if(profilSegment) {
profile_segment *seg = profilSegment;
do {
u16 *b = (u16 *)seg->sbuf;
int pc = ((reg[15].I - seg->s_lowpc) * seg->s_scale)/0x10000;
if(pc >= 0 && pc < seg->ssiz) {
b[pc]++;
break;
}
seg = seg->next;
} while(seg);
}
}
#endif
ticks -= clockTicks;
#ifdef LINK_EMULATION
if (linkenable)
LinkUpdate(clockTicks);
#endif
cpuNextEvent = CPUUpdateTicks();
if(cpuDmaTicksToUpdate > 0) {
if(cpuDmaTicksToUpdate > cpuNextEvent)
clockTicks = cpuNextEvent;
else
clockTicks = cpuDmaTicksToUpdate;
cpuDmaTicksToUpdate -= clockTicks;
if(cpuDmaTicksToUpdate < 0)
cpuDmaTicksToUpdate = 0;
cpuDmaHack = true;
goto updateLoop;
}
#ifdef LINK_EMULATION
if(linkenable)
cpuNextEvent = 1;
#endif
if(IF && (IME & 1) && armIrqEnable) {
int res = IF & IE;
if(stopState)
res &= 0x3080;
if(res) {
if (intState)
{
if (!IRQTicks)
{
CPUInterrupt();
intState = false;
holdState = false;
stopState = false;
holdType = 0;
}
}
else
{
if (!holdState)
{
intState = true;
IRQTicks=7;
if (cpuNextEvent> IRQTicks)
cpuNextEvent = IRQTicks;
}
else
{
CPUInterrupt();
holdState = false;
stopState = false;
holdType = 0;
}
}
// Stops the SWI Ticks emulation if an IRQ is executed
//(to avoid problems with nested IRQ/SWI)
if (SWITicks)
SWITicks = 0;
}
}
if(remainingTicks > 0) {
if(remainingTicks > cpuNextEvent)
clockTicks = cpuNextEvent;
else
clockTicks = remainingTicks;
remainingTicks -= clockTicks;
if(remainingTicks < 0)
remainingTicks = 0;
goto updateLoop;
}
if (timerOnOffDelay)
applyTimer();
if(cpuNextEvent > ticks)
cpuNextEvent = ticks;
if(ticks <= 0 || cpuBreakLoop)
break;
}
}
}
struct EmulatedSystem GBASystem = {
// emuMain
CPULoop,
// emuReset
CPUReset,
// emuCleanUp
CPUCleanUp,
// emuReadBattery
CPUReadBatteryFile,
// emuWriteBattery
CPUWriteBatteryFile,
// emuReadState
CPUReadState,
// emuWriteState
CPUWriteState,
// emuReadMemState
CPUReadMemState,
// emuWriteMemState
CPUWriteMemState,
// emuWritePNG
CPUWritePNGFile,
// emuWriteBMP
CPUWriteBMPFile,
// emuUpdateCPSR
CPUUpdateCPSR,
// emuHasDebugger
true,
// emuCount
#ifdef FINAL_VERSION
250000
#else
5000
#endif
};
Reference in New Issue Copy Permalink