Mercurial > vba-linux

     1 #include <cstdio>

     2 #include <cstdlib>

     3 #include <cstdarg>

     4 #include <cstring>

     5 

     6 #include "../Port.h"

     7 #include "../NLS.h"

     8 #include "GBA.h"

     9 //#include "GBAGlobals.h"

    10 #include "GBACheats.h" // FIXME: SDL requires this included before "GBAinline.h"

    11 #include "GBAinline.h"

    12 #include "GBAGfx.h"

    13 #include "GBASound.h"

    14 #include "EEprom.h"

    15 #include "Flash.h"

    16 #include "Sram.h"

    17 #include "bios.h"

    18 #include "elf.h"

    19 #include "agbprint.h"

    20 #include "../common/unzip.h"

    21 #include "../common/Util.h"

    22 #include "../common/movie.h"

    23 #include "../common/vbalua.h"

    24 

    25 #ifdef PROFILING

    26 #include "../prof/prof.h"

    27 #endif

    28 

    29 #define UPDATE_REG(address, value) WRITE16LE(((u16 *)&ioMem[address]), value)

    30 

    31 #ifdef __GNUC__

    32 #define _stricmp strcasecmp

    33 #endif

    34 

    35 #define CPU_BREAK_LOOP \

    36     cpuSavedTicks	 = cpuSavedTicks - *extCpuLoopTicks; \

    37     *extCpuLoopTicks = *extClockTicks;

    38 

    39 #define CPU_BREAK_LOOP_2 \

    40     cpuSavedTicks	 = cpuSavedTicks - *extCpuLoopTicks; \

    41     *extCpuLoopTicks = *extClockTicks; \

    42     *extTicks		 = *extClockTicks;

    43 

    44 int32 cpuDmaTicksToUpdate = 0;

    45 int32 cpuDmaCount		  = 0;

    46 bool8 cpuDmaHack		  = 0;

    47 u32	  cpuDmaLast		  = 0;

    48 int32 dummyAddress		  = 0;

    49 

    50 int32 *extCpuLoopTicks = NULL;

    51 int32 *extClockTicks   = NULL;

    52 int32 *extTicks		   = NULL;

    53 

    54 #if (defined(WIN32) && !defined(SDL))

    55 HANDLE mapROM;        // shared memory handles

    56 HANDLE mapWORKRAM;

    57 HANDLE mapBIOS;

    58 HANDLE mapIRAM;

    59 HANDLE mapPALETTERAM;

    60 HANDLE mapVRAM;

    61 HANDLE mapOAM;

    62 HANDLE mapPIX;

    63 HANDLE mapIOMEM;

    64 #endif

    65 

    66 int32 gbaSaveType = 0;      // used to remember the save type on reset

    67 bool8 intState	  = false;

    68 bool8 stopState	  = false;

    69 bool8 holdState	  = false;

    70 int32 holdType	  = 0;

    71 bool8 cpuSramEnabled		 = true;

    72 bool8 cpuFlashEnabled		 = true;

    73 bool8 cpuEEPROMEnabled		 = true;

    74 bool8 cpuEEPROMSensorEnabled = false;

    75 

    76 #ifdef PROFILING

    77 int profilingTicks		  = 0;

    78 int profilingTicksReload  = 0;

    79 static char *profilBuffer = NULL;

    80 static int	 profilSize	  = 0;

    81 static u32	 profilLowPC  = 0;

    82 static int	 profilScale  = 0;

    83 #endif

    84 bool8 freezeWorkRAM[0x40000];

    85 bool8 freezeInternalRAM[0x8000];

    86 int32 lcdTicks = 960;

    87 bool8 timer0On = false;

    88 int32 timer0Ticks		= 0;

    89 int32 timer0Reload		= 0;

    90 int32 timer0ClockReload = 0;

    91 bool8 timer1On			= false;

    92 int32 timer1Ticks		= 0;

    93 int32 timer1Reload		= 0;

    94 int32 timer1ClockReload = 0;

    95 bool8 timer2On			= false;

    96 int32 timer2Ticks		= 0;

    97 int32 timer2Reload		= 0;

    98 int32 timer2ClockReload = 0;

    99 bool8 timer3On			= false;

   100 int32 timer3Ticks		= 0;

   101 int32 timer3Reload		= 0;

   102 int32 timer3ClockReload = 0;

   103 u32	  dma0Source		= 0;

   104 u32	  dma0Dest			= 0;

   105 u32	  dma1Source		= 0;

   106 u32	  dma1Dest			= 0;

   107 u32	  dma2Source		= 0;

   108 u32	  dma2Dest			= 0;

   109 u32	  dma3Source		= 0;

   110 u32	  dma3Dest			= 0;

   111 void  (*cpuSaveGameFunc)(u32, u8) = flashSaveDecide;

   112 void  (*renderLine)() = mode0RenderLine;

   113 bool8 fxOn = false;

   114 bool8 windowOn		 = false;

   115 int32 frameSkipCount = 0;

   116 u32	  gbaLastTime	 = 0;

   117 int32 gbaFrameCount	 = 0;

   118 bool8 prefetchActive = false, prefetchPrevActive = false, prefetchApplies = false;

   119 char  buffer[1024];

   120 FILE *out = NULL;

   121 

   122 static bool newFrame = true;

   123 static bool pauseAfterFrameAdvance = false;

   124 

   125 const int32 TIMER_TICKS[4] = {

   126 	1,

   127 	64,

   128 	256,

   129 	1024

   130 };

   131 

   132 const int32 thumbCycles[] = {

   133 //  0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f

   134 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  // 0

   135 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  // 1

   136 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  // 2

   137 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  // 3

   138 	1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3,  // 4

   139 	2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,  // 5

   140 	2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,  // 6

   141 	2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,  // 7

   142 	2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,  // 8

   143 	2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,  // 9

   144 	3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,  // a

   145 	1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 2, 4, 1, 1,  // b

   146 	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,  // c

   147 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3,  // d

   148 	3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,  // e

   149 	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2   // f

   150 };

   151 

   152 const int32 gamepakRamWaitState[4] = { 4, 3, 2, 8 };

   153 const int32 gamepakWaitState[8] =  { 4, 3, 2, 8, 4, 3, 2, 8 };

   154 const int32 gamepakWaitState0[8] = { 2, 2, 2, 2, 1, 1, 1, 1 };

   155 const int32 gamepakWaitState1[8] = { 4, 4, 4, 4, 1, 1, 1, 1 };

   156 const int32 gamepakWaitState2[8] = { 8, 8, 8, 8, 1, 1, 1, 1 };

   157 

   158 int32 memoryWait[16] =

   159 { 0, 0, 2, 0, 0, 0, 0, 0, 4, 4, 4, 4, 4, 4, 4, 0 };

   160 int32 memoryWait32[16] =

   161 { 0, 0, 9, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 0 };

   162 int32 memoryWaitSeq[16] =

   163 { 0, 0, 2, 0, 0, 0, 0, 0, 2, 2, 4, 4, 8, 8, 4, 0 };

   164 int32 memoryWaitSeq32[16] =

   165 { 2, 0, 3, 0, 0, 2, 2, 0, 4, 4, 8, 8, 16, 16, 8, 0 };

   166 int32 memoryWaitFetch[16] =

   167 { 3, 0, 3, 0, 0, 1, 1, 0, 4, 4, 4, 4, 4, 4, 4, 0 };

   168 int32 memoryWaitFetch32[16] =

   169 { 6, 0, 6, 0, 0, 2, 2, 0, 8, 8, 8, 8, 8, 8, 8, 0 };

   170 

   171 const int32 cpuMemoryWait[16] = {

   172 	0, 0, 2, 0, 0, 0, 0, 0,

   173 	2, 2, 2, 2, 2, 2, 0, 0

   174 };

   175 const int32 cpuMemoryWait32[16] = {

   176 	0, 0, 3, 0, 0, 0, 0, 0,

   177 	3, 3, 3, 3, 3, 3, 0, 0

   178 };

   179 

   180 const bool8 memory32[16] = {

   181 	true, false, false, true, true, false, false, true, false, false, false, false, false, false, true, false

   182 };

   183 

   184 u8 biosProtected[4];

   185 

   186 u8 cpuBitsSet[256];

   187 u8 cpuLowestBitSet[256];

   188 

   189 #ifdef WORDS_BIGENDIAN

   190 bool8 cpuBiosSwapped = false;

   191 #endif

   192 

   193 u32 myROM[] = {

   194 	0xEA000006,

   195 	0xEA000093,

   196 	0xEA000006,

   197 	0x00000000,

   198 	0x00000000,

   199 	0x00000000,

   200 	0xEA000088,

   201 	0x00000000,

   202 	0xE3A00302,

   203 	0xE1A0F000,

   204 	0xE92D5800,

   205 	0xE55EC002,

   206 	0xE28FB03C,

   207 	0xE79BC10C,

   208 	0xE14FB000,

   209 	0xE92D0800,

   210 	0xE20BB080,

   211 	0xE38BB01F,

   212 	0xE129F00B,

   213 	0xE92D4004,

   214 	0xE1A0E00F,

   215 	0xE12FFF1C,

   216 	0xE8BD4004,

   217 	0xE3A0C0D3,

   218 	0xE129F00C,

   219 	0xE8BD0800,

   220 	0xE169F00B,

   221 	0xE8BD5800,

   222 	0xE1B0F00E,

   223 	0x0000009C,

   224 	0x0000009C,

   225 	0x0000009C,

   226 	0x0000009C,

   227 	0x000001F8,

   228 	0x000001F0,

   229 	0x000000AC,

   230 	0x000000A0,

   231 	0x000000FC,

   232 	0x00000168,

   233 	0xE12FFF1E,

   234 	0xE1A03000,

   235 	0xE1A00001,

   236 	0xE1A01003,

   237 	0xE2113102,

   238 	0x42611000,

   239 	0xE033C040,

   240 	0x22600000,

   241 	0xE1B02001,

   242 	0xE15200A0,

   243 	0x91A02082,

   244 	0x3AFFFFFC,

   245 	0xE1500002,

   246 	0xE0A33003,

   247 	0x20400002,

   248 	0xE1320001,

   249 	0x11A020A2,

   250 	0x1AFFFFF9,

   251 	0xE1A01000,

   252 	0xE1A00003,

   253 	0xE1B0C08C,

   254 	0x22600000,

   255 	0x42611000,

   256 	0xE12FFF1E,

   257 	0xE92D0010,

   258 	0xE1A0C000,

   259 	0xE3A01001,

   260 	0xE1500001,

   261 	0x81A000A0,

   262 	0x81A01081,

   263 	0x8AFFFFFB,

   264 	0xE1A0000C,

   265 	0xE1A04001,

   266 	0xE3A03000,

   267 	0xE1A02001,

   268 	0xE15200A0,

   269 	0x91A02082,

   270 	0x3AFFFFFC,

   271 	0xE1500002,

   272 	0xE0A33003,

   273 	0x20400002,

   274 	0xE1320001,

   275 	0x11A020A2,

   276 	0x1AFFFFF9,

   277 	0xE0811003,

   278 	0xE1B010A1,

   279 	0xE1510004,

   280 	0x3AFFFFEE,

   281 	0xE1A00004,

   282 	0xE8BD0010,

   283 	0xE12FFF1E,

   284 	0xE0010090,

   285 	0xE1A01741,

   286 	0xE2611000,

   287 	0xE3A030A9,

   288 	0xE0030391,

   289 	0xE1A03743,

   290 	0xE2833E39,

   291 	0xE0030391,

   292 	0xE1A03743,

   293 	0xE2833C09,

   294 	0xE283301C,

   295 	0xE0030391,

   296 	0xE1A03743,

   297 	0xE2833C0F,

   298 	0xE28330B6,

   299 	0xE0030391,

   300 	0xE1A03743,

   301 	0xE2833C16,

   302 	0xE28330AA,

   303 	0xE0030391,

   304 	0xE1A03743,

   305 	0xE2833A02,

   306 	0xE2833081,

   307 	0xE0030391,

   308 	0xE1A03743,

   309 	0xE2833C36,

   310 	0xE2833051,

   311 	0xE0030391,

   312 	0xE1A03743,

   313 	0xE2833CA2,

   314 	0xE28330F9,

   315 	0xE0000093,

   316 	0xE1A00840,

   317 	0xE12FFF1E,

   318 	0xE3A00001,

   319 	0xE3A01001,

   320 	0xE92D4010,

   321 	0xE3A0C301,

   322 	0xE3A03000,

   323 	0xE3A04001,

   324 	0xE3500000,

   325 	0x1B000004,

   326 	0xE5CC3301,

   327 	0xEB000002,

   328 	0x0AFFFFFC,

   329 	0xE8BD4010,

   330 	0xE12FFF1E,

   331 	0xE5CC3208,

   332 	0xE15C20B8,

   333 	0xE0110002,

   334 	0x10200002,

   335 	0x114C00B8,

   336 	0xE5CC4208,

   337 	0xE12FFF1E,

   338 	0xE92D500F,

   339 	0xE3A00301,

   340 	0xE1A0E00F,

   341 	0xE510F004,

   342 	0xE8BD500F,

   343 	0xE25EF004,

   344 	0xE59FD044,

   345 	0xE92D5000,

   346 	0xE14FC000,

   347 	0xE10FE000,

   348 	0xE92D5000,

   349 	0xE3A0C302,

   350 	0xE5DCE09C,

   351 	0xE35E00A5,

   352 	0x1A000004,

   353 	0x05DCE0B4,

   354 	0x021EE080,

   355 	0xE28FE004,

   356 	0x159FF018,

   357 	0x059FF018,

   358 	0xE59FD018,

   359 	0xE8BD5000,

   360 	0xE169F00C,

   361 	0xE8BD5000,

   362 	0xE25EF004,

   363 	0x03007FF0,

   364 	0x09FE2000,

   365 	0x09FFC000,

   366 	0x03007FE0

   367 };

   368 

   369 variable_desc saveGameStruct[] = {

   370 	{ &DISPCNT,			  sizeof(u16)				 },

   371 	{ &DISPSTAT,		  sizeof(u16)				 },

   372 	{ &VCOUNT,			  sizeof(u16)				 },

   373 	{ &BG0CNT,			  sizeof(u16)				 },

   374 	{ &BG1CNT,			  sizeof(u16)				 },

   375 	{ &BG2CNT,			  sizeof(u16)				 },

   376 	{ &BG3CNT,			  sizeof(u16)				 },

   377 	{ &BG0HOFS,			  sizeof(u16)				 },

   378 	{ &BG0VOFS,			  sizeof(u16)				 },

   379 	{ &BG1HOFS,			  sizeof(u16)				 },

   380 	{ &BG1VOFS,			  sizeof(u16)				 },

   381 	{ &BG2HOFS,			  sizeof(u16)				 },

   382 	{ &BG2VOFS,			  sizeof(u16)				 },

   383 	{ &BG3HOFS,			  sizeof(u16)				 },

   384 	{ &BG3VOFS,			  sizeof(u16)				 },

   385 	{ &BG2PA,			  sizeof(u16)				 },

   386 	{ &BG2PB,			  sizeof(u16)				 },

   387 	{ &BG2PC,			  sizeof(u16)				 },

   388 	{ &BG2PD,			  sizeof(u16)				 },

   389 	{ &BG2X_L,			  sizeof(u16)				 },

   390 	{ &BG2X_H,			  sizeof(u16)				 },

   391 	{ &BG2Y_L,			  sizeof(u16)				 },

   392 	{ &BG2Y_H,			  sizeof(u16)				 },

   393 	{ &BG3PA,			  sizeof(u16)				 },

   394 	{ &BG3PB,			  sizeof(u16)				 },

   395 	{ &BG3PC,			  sizeof(u16)				 },

   396 	{ &BG3PD,			  sizeof(u16)				 },

   397 	{ &BG3X_L,			  sizeof(u16)				 },

   398 	{ &BG3X_H,			  sizeof(u16)				 },

   399 	{ &BG3Y_L,			  sizeof(u16)				 },

   400 	{ &BG3Y_H,			  sizeof(u16)				 },

   401 	{ &WIN0H,			  sizeof(u16)				 },

   402 	{ &WIN1H,			  sizeof(u16)				 },

   403 	{ &WIN0V,			  sizeof(u16)				 },

   404 	{ &WIN1V,			  sizeof(u16)				 },

   405 	{ &WININ,			  sizeof(u16)				 },

   406 	{ &WINOUT,			  sizeof(u16)				 },

   407 	{ &MOSAIC,			  sizeof(u16)				 },

   408 	{ &BLDMOD,			  sizeof(u16)				 },

   409 	{ &COLEV,			  sizeof(u16)				 },

   410 	{ &COLY,			  sizeof(u16)				 },

   411 	{ &DM0SAD_L,		  sizeof(u16)				 },

   412 	{ &DM0SAD_H,		  sizeof(u16)				 },

   413 	{ &DM0DAD_L,		  sizeof(u16)				 },

   414 	{ &DM0DAD_H,		  sizeof(u16)				 },

   415 	{ &DM0CNT_L,		  sizeof(u16)				 },

   416 	{ &DM0CNT_H,		  sizeof(u16)				 },

   417 	{ &DM1SAD_L,		  sizeof(u16)				 },

   418 	{ &DM1SAD_H,		  sizeof(u16)				 },

   419 	{ &DM1DAD_L,		  sizeof(u16)				 },

   420 	{ &DM1DAD_H,		  sizeof(u16)				 },

   421 	{ &DM1CNT_L,		  sizeof(u16)				 },

   422 	{ &DM1CNT_H,		  sizeof(u16)				 },

   423 	{ &DM2SAD_L,		  sizeof(u16)				 },

   424 	{ &DM2SAD_H,		  sizeof(u16)				 },

   425 	{ &DM2DAD_L,		  sizeof(u16)				 },

   426 	{ &DM2DAD_H,		  sizeof(u16)				 },

   427 	{ &DM2CNT_L,		  sizeof(u16)				 },

   428 	{ &DM2CNT_H,		  sizeof(u16)				 },

   429 	{ &DM3SAD_L,		  sizeof(u16)				 },

   430 	{ &DM3SAD_H,		  sizeof(u16)				 },

   431 	{ &DM3DAD_L,		  sizeof(u16)				 },

   432 	{ &DM3DAD_H,		  sizeof(u16)				 },

   433 	{ &DM3CNT_L,		  sizeof(u16)				 },

   434 	{ &DM3CNT_H,		  sizeof(u16)				 },

   435 	{ &TM0D,			  sizeof(u16)				 },

   436 	{ &TM0CNT,			  sizeof(u16)				 },

   437 	{ &TM1D,			  sizeof(u16)				 },

   438 	{ &TM1CNT,			  sizeof(u16)				 },

   439 	{ &TM2D,			  sizeof(u16)				 },

   440 	{ &TM2CNT,			  sizeof(u16)				 },

   441 	{ &TM3D,			  sizeof(u16)				 },

   442 	{ &TM3CNT,			  sizeof(u16)				 },

   443 	{ &P1,				  sizeof(u16)				 },

   444 	{ &IE,				  sizeof(u16)				 },

   445 	{ &IF,				  sizeof(u16)				 },

   446 	{ &IME,				  sizeof(u16)				 },

   447 	{ &holdState,		  sizeof(bool8)				 },

   448 	{ &holdType,		  sizeof(int32)				 },

   449 	{ &lcdTicks,		  sizeof(int32)				 },

   450 	{ &timer0On,		  sizeof(bool8)				 },

   451 	{ &timer0Ticks,		  sizeof(int32)				 },

   452 	{ &timer0Reload,	  sizeof(int32)				 },

   453 	{ &timer0ClockReload, sizeof(int32)				 },

   454 	{ &timer1On,		  sizeof(bool8)				 },

   455 	{ &timer1Ticks,		  sizeof(int32)				 },

   456 	{ &timer1Reload,	  sizeof(int32)				 },

   457 	{ &timer1ClockReload, sizeof(int32)				 },

   458 	{ &timer2On,		  sizeof(bool8)				 },

   459 	{ &timer2Ticks,		  sizeof(int32)				 },

   460 	{ &timer2Reload,	  sizeof(int32)				 },

   461 	{ &timer2ClockReload, sizeof(int32)				 },

   462 	{ &timer3On,		  sizeof(bool8)				 },

   463 	{ &timer3Ticks,		  sizeof(int32)				 },

   464 	{ &timer3Reload,	  sizeof(int32)				 },

   465 	{ &timer3ClockReload, sizeof(int32)				 },

   466 	{ &dma0Source,		  sizeof(u32)				 },

   467 	{ &dma0Dest,		  sizeof(u32)				 },

   468 	{ &dma1Source,		  sizeof(u32)				 },

   469 	{ &dma1Dest,		  sizeof(u32)				 },

   470 	{ &dma2Source,		  sizeof(u32)				 },

   471 	{ &dma2Dest,		  sizeof(u32)				 },

   472 	{ &dma3Source,		  sizeof(u32)				 },

   473 	{ &dma3Dest,		  sizeof(u32)				 },

   474 	{ &fxOn,			  sizeof(bool8)				 },

   475 	{ &windowOn,		  sizeof(bool8)				 },

   476 	{ &N_FLAG,			  sizeof(bool8)				 },

   477 	{ &C_FLAG,			  sizeof(bool8)				 },

   478 	{ &Z_FLAG,			  sizeof(bool8)				 },

   479 	{ &V_FLAG,			  sizeof(bool8)				 },

   480 	{ &armState,		  sizeof(bool8)				 },

   481 	{ &armIrqEnable,	  sizeof(bool8)				 },

   482 	{ &armNextPC,		  sizeof(u32)				 },

   483 	{ &armMode,			  sizeof(int32)				 },

   484 	{ &saveType,		  sizeof(int32)				 },

   485 	{ NULL,				  0							 }

   486 };

   487 

   488 //int cpuLoopTicks = 0;

   489 int cpuSavedTicks = 0;

   490 

   491 #ifdef PROFILING

   492 void cpuProfil(char *buf, int size, u32 lowPC, int scale)

   493 {

   494 	profilBuffer = buf;

   495 	profilSize	 = size;

   496 	profilLowPC	 = lowPC;

   497 	profilScale	 = scale;

   498 }

   499 

   500 void cpuEnableProfiling(int hz)

   501 {

   502 	if (hz == 0)

   503 		hz = 100;

   504 	profilingTicks = profilingTicksReload = 16777216 / hz;

   505 	profSetHertz(hz);

   506 }

   507 

   508 #endif

   509 

   510 inline int CPUUpdateTicksAccess32(u32 address)

   511 {

   512 	return memoryWait32[(address >> 24) & 15];

   513 }

   514 

   515 inline int CPUUpdateTicksAccess16(u32 address)

   516 {

   517 	return memoryWait[(address >> 24) & 15];

   518 }

   519 

   520 inline int CPUUpdateTicksAccessSeq32(u32 address)

   521 {

   522 	return memoryWaitSeq32[(address >> 24) & 15];

   523 }

   524 

   525 inline int CPUUpdateTicksAccessSeq16(u32 address)

   526 {

   527 	return memoryWaitSeq[(address >> 24) & 15];

   528 }

   529 

   530 inline int CPUUpdateTicks()

   531 {

   532 	int cpuLoopTicks = lcdTicks;

   533 

   534 	if (soundTicks < cpuLoopTicks)

   535 		cpuLoopTicks = soundTicks;

   536 

   537 	if (timer0On && !(TM0CNT & 4) && (timer0Ticks < cpuLoopTicks))

   538 	{

   539 		cpuLoopTicks = timer0Ticks;

   540 	}

   541 	if (timer1On && !(TM1CNT & 4) && (timer1Ticks < cpuLoopTicks))

   542 	{

   543 		cpuLoopTicks = timer1Ticks;

   544 	}

   545 	if (timer2On && !(TM2CNT & 4) && (timer2Ticks < cpuLoopTicks))

   546 	{

   547 		cpuLoopTicks = timer2Ticks;

   548 	}

   549 	if (timer3On && !(TM3CNT & 4) && (timer3Ticks < cpuLoopTicks))

   550 	{

   551 		cpuLoopTicks = timer3Ticks;

   552 	}

   553 #ifdef PROFILING

   554 	if (profilingTicksReload != 0)

   555 	{

   556 		if (profilingTicks < cpuLoopTicks)

   557 		{

   558 			cpuLoopTicks = profilingTicks;

   559 		}

   560 	}

   561 #endif

   562 	cpuSavedTicks = cpuLoopTicks;

   563 	return cpuLoopTicks;

   564 }

   565 

   566 void CPUUpdateWindow0()

   567 {

   568 	int x00 = WIN0H >> 8;

   569 	int x01 = WIN0H & 255;

   570 

   571 	if (x00 <= x01)

   572 	{

   573 		for (int i = 0; i < 240; i++)

   574 		{

   575 			gfxInWin0[i] = (i >= x00 && i < x01);

   576 		}

   577 	}

   578 	else

   579 	{

   580 		for (int i = 0; i < 240; i++)

   581 		{

   582 			gfxInWin0[i] = (i >= x00 || i < x01);

   583 		}

   584 	}

   585 }

   586 

   587 void CPUUpdateWindow1()

   588 {

   589 	int x00 = WIN1H >> 8;

   590 	int x01 = WIN1H & 255;

   591 

   592 	if (x00 <= x01)

   593 	{

   594 		for (int i = 0; i < 240; i++)

   595 		{

   596 			gfxInWin1[i] = (i >= x00 && i < x01);

   597 		}

   598 	}

   599 	else

   600 	{

   601 		for (int i = 0; i < 240; i++)

   602 		{

   603 			gfxInWin1[i] = (i >= x00 || i < x01);

   604 		}

   605 	}

   606 }

   607 

   608 #define CLEAR_ARRAY(a) \

   609 	{ \

   610 		u32 *array = (a); \

   611 		for (int i = 0; i < 240; i++) { \

   612 			*array++ = 0x80000000; \

   613 		} \

   614 	} \

   615 

   616 void CPUUpdateRenderBuffers(bool force)

   617 {

   618 	if (!(layerEnable & 0x0100) || force)

   619 	{

   620 		CLEAR_ARRAY(line0);

   621 	}

   622 	if (!(layerEnable & 0x0200) || force)

   623 	{

   624 		CLEAR_ARRAY(line1);

   625 	}

   626 	if (!(layerEnable & 0x0400) || force)

   627 	{

   628 		CLEAR_ARRAY(line2);

   629 	}

   630 	if (!(layerEnable & 0x0800) || force)

   631 	{

   632 		CLEAR_ARRAY(line3);

   633 	}

   634 }

   635 

   636 bool CPUWriteStateToStream(gzFile gzFile)

   637 {

   638 	utilWriteInt(gzFile, SAVE_GAME_VERSION);

   639 

   640 	utilGzWrite(gzFile, &rom[0xa0], 16);

   641 

   642 	utilWriteInt(gzFile, useBios);

   643 

   644 	utilGzWrite(gzFile, &reg[0], sizeof(reg));

   645 

   646 	utilWriteData(gzFile, saveGameStruct);

   647 

   648 	// new to version 0.7.1

   649 	utilWriteInt(gzFile, stopState);

   650 	// new to version 0.8

   651 	utilWriteInt(gzFile, intState);

   652 

   653 	utilGzWrite(gzFile, internalRAM, 0x8000);

   654 	utilGzWrite(gzFile, paletteRAM, 0x400);

   655 	utilGzWrite(gzFile, workRAM, 0x40000);

   656 	utilGzWrite(gzFile, vram, 0x20000);

   657 	utilGzWrite(gzFile, oam, 0x400);

   658 	utilGzWrite(gzFile, pix, 4 * 241 * 162);

   659 	utilGzWrite(gzFile, ioMem, 0x400);

   660 

   661 	eepromSaveGame(gzFile);

   662 	flashSaveGame(gzFile);

   663 	soundSaveGame(gzFile);

   664 

   665 	cheatsSaveGame(gzFile);

   666 

   667 	// version 1.5

   668 	rtcSaveGame(gzFile);

   669 

   670 	// SAVE_GAME_VERSION_9 (new to re-recording version which is based on 1.72)

   671 	{

   672 		extern int32 sensorX, sensorY; // from SDL.cpp

   673 		utilGzWrite(gzFile, &sensorX, sizeof(sensorX));

   674 		utilGzWrite(gzFile, &sensorY, sizeof(sensorY));

   675 		bool8 movieActive = VBAMovieActive();

   676 		utilGzWrite(gzFile, &movieActive, sizeof(movieActive));

   677 		if (movieActive)

   678 		{

   679 			uint8 *movie_freeze_buf	 = NULL;

   680 			uint32 movie_freeze_size = 0;

   681 

   682 			VBAMovieFreeze(&movie_freeze_buf, &movie_freeze_size);

   683 			if (movie_freeze_buf)

   684 			{

   685 				utilGzWrite(gzFile, &movie_freeze_size, sizeof(movie_freeze_size));

   686 				utilGzWrite(gzFile, movie_freeze_buf, movie_freeze_size);

   687 				delete [] movie_freeze_buf;

   688 			}

   689 			else

   690 			{

   691 				systemMessage(0, N_("Failed to save movie snapshot."));

   692 				return false;

   693 			}

   694 		}

   695 		utilGzWrite(gzFile, &GBASystemCounters.frameCount, sizeof(GBASystemCounters.frameCount));

   696 	}

   697 

   698 	// SAVE_GAME_VERSION_10

   699 	{

   700 		utilGzWrite(gzFile, memoryWait, 16 * sizeof(int32));

   701 		utilGzWrite(gzFile, memoryWait32, 16 * sizeof(int32));

   702 		utilGzWrite(gzFile, memoryWaitSeq, 16 * sizeof(int32));

   703 		utilGzWrite(gzFile, memoryWaitSeq32, 16 * sizeof(int32));

   704 		utilGzWrite(gzFile, memoryWaitFetch, 16 * sizeof(int32));

   705 		utilGzWrite(gzFile, memoryWaitFetch32, 16 * sizeof(int32));

   706 	}

   707 

   708 	// SAVE_GAME_VERSION_11

   709 	{

   710 		utilGzWrite(gzFile, &prefetchActive, sizeof(bool8));

   711 		utilGzWrite(gzFile, &prefetchPrevActive, sizeof(bool8));

   712 		utilGzWrite(gzFile, &prefetchApplies, sizeof(bool8));

   713 	}

   714 

   715 	// SAVE_GAME_VERSION_12

   716 	{

   717 		utilGzWrite(gzFile, &memLagTempEnabled, sizeof(bool8)); // necessary

   718 		utilGzWrite(gzFile, &speedHack, sizeof(bool8)); // just in case it's ever used...

   719 	}

   720 

   721 	// SAVE_GAME_VERSION_13

   722 	{

   723 		utilGzWrite(gzFile, &GBASystemCounters.lagCount, sizeof(GBASystemCounters.lagCount));

   724 		utilGzWrite(gzFile, &GBASystemCounters.lagged, sizeof(GBASystemCounters.lagged));

   725 		utilGzWrite(gzFile, &GBASystemCounters.laggedLast, sizeof(GBASystemCounters.laggedLast));

   726 	}

   727 

   728 	return true;

   729 }

   730 

   731 bool CPUWriteState(const char *file)

   732 {

   733 	gzFile gzFile = utilGzOpen(file, "wb");

   734 

   735 	if (gzFile == NULL)

   736 	{

   737 		systemMessage(MSG_ERROR_CREATING_FILE, N_("Error creating file %s"), file);

   738 		return false;

   739 	}

   740 

   741 	bool res = CPUWriteStateToStream(gzFile);

   742 

   743 	utilGzClose(gzFile);

   744 

   745 	return res;

   746 }

   747 

   748 bool CPUWriteMemState(char *memory, int available)

   749 {

   750 	gzFile gzFile = utilMemGzOpen(memory, available, "w");

   751 

   752 	if (gzFile == NULL)

   753 	{

   754 		return false;

   755 	}

   756 

   757 	bool res = CPUWriteStateToStream(gzFile);

   758 

   759 	long pos = utilGzTell(gzFile) + 8;

   760 

   761 	if (pos >= (available))

   762 		res = false;

   763 

   764 	utilGzClose(gzFile);

   765 

   766 	return res;

   767 }

   768 

   769 static int	tempStateID	  = 0;

   770 static int	tempFailCount = 0;

   771 static bool backupSafe	  = true;

   772 

   773 bool CPUReadStateFromStream(gzFile gzFile)

   774 {

   775 	bool8 ub;

   776 	char  tempBackupName [128];

   777 	if (backupSafe)

   778 	{

   779 		sprintf(tempBackupName, "gbatempsave%d.sav", tempStateID++);

   780 		CPUWriteState(tempBackupName);

   781 	}

   782 

   783 	int version = utilReadInt(gzFile);

   784 

   785 	if (version > SAVE_GAME_VERSION || version < SAVE_GAME_VERSION_1)

   786 	{

   787 		systemMessage(MSG_UNSUPPORTED_VBA_SGM,

   788 		              N_("Unsupported VisualBoyAdvance save game version %d"),

   789 		              version);

   790 		goto failedLoad;

   791 	}

   792 

   793 	u8 romname[17];

   794 

   795 	utilGzRead(gzFile, romname, 16);

   796 

   797 	if (memcmp(&rom[0xa0], romname, 16) != 0)

   798 	{

   799 		romname[16] = 0;

   800 		for (int i = 0; i < 16; i++)

   801 			if (romname[i] < 32)

   802 				romname[i] = 32;

   803 		systemMessage(MSG_CANNOT_LOAD_SGM, N_("Cannot load save game for %s"), romname);

   804 		goto failedLoad;

   805 	}

   806 

   807 	ub = utilReadInt(gzFile) ? true : false;

   808 

   809 	if (ub != useBios)

   810 	{

   811 		if (useBios)

   812 			systemMessage(MSG_SAVE_GAME_NOT_USING_BIOS,

   813 			              N_("Save game is not using the BIOS files"));

   814 		else

   815 			systemMessage(MSG_SAVE_GAME_USING_BIOS,

   816 			              N_("Save game is using the BIOS file"));

   817 		goto failedLoad;

   818 	}

   819 

   820 	utilGzRead(gzFile, &reg[0], sizeof(reg));

   821 

   822 	utilReadData(gzFile, saveGameStruct);

   823 

   824 	if (version < SAVE_GAME_VERSION_3)

   825 		stopState = false;

   826 	else

   827 		stopState = utilReadInt(gzFile) ? true : false;

   828 

   829 	if (version < SAVE_GAME_VERSION_4)

   830 		intState = false;

   831 	else

   832 		intState = utilReadInt(gzFile) ? true : false;

   833 

   834 	utilGzRead(gzFile, internalRAM, 0x8000);

   835 	utilGzRead(gzFile, paletteRAM, 0x400);

   836 	utilGzRead(gzFile, workRAM, 0x40000);

   837 	utilGzRead(gzFile, vram, 0x20000);

   838 	utilGzRead(gzFile, oam, 0x400);

   839 	if (version < SAVE_GAME_VERSION_6)

   840 		utilGzRead(gzFile, pix, 4 * 240 * 160);

   841 	else

   842 		utilGzRead(gzFile, pix, 4 * 241 * 162);

   843 	utilGzRead(gzFile, ioMem, 0x400);

   844 

   845 	eepromReadGame(gzFile, version);

   846 	flashReadGame(gzFile, version);

   847 	soundReadGame(gzFile, version);

   848 

   849 	if (version > SAVE_GAME_VERSION_1)

   850 	{

   851 		cheatsReadGame(gzFile);

   852 	}

   853 	if (version > SAVE_GAME_VERSION_6)

   854 	{

   855 		rtcReadGame(gzFile);

   856 	}

   857 

   858 	if (version <= SAVE_GAME_VERSION_7)

   859 	{

   860 		u32 temp;

   861 #define SWAP(a, b, c) \

   862 	temp = (a); \

   863 	(a)	 = (b) << 16 | (c); \

   864 	(b)	 = (temp) >> 16; \

   865 	(c)	 = (temp) & 0xFFFF;

   866 

   867 		SWAP(dma0Source, DM0SAD_H, DM0SAD_L);

   868 		SWAP(dma0Dest,   DM0DAD_H, DM0DAD_L);

   869 		SWAP(dma1Source, DM1SAD_H, DM1SAD_L);

   870 		SWAP(dma1Dest,   DM1DAD_H, DM1DAD_L);

   871 		SWAP(dma2Source, DM2SAD_H, DM2SAD_L);

   872 		SWAP(dma2Dest,   DM2DAD_H, DM2DAD_L);

   873 		SWAP(dma3Source, DM3SAD_H, DM3SAD_L);

   874 		SWAP(dma3Dest,   DM3DAD_H, DM3DAD_L);

   875 	}

   876 

   877 	// set pointers!

   878 	layerEnable = layerSettings & DISPCNT;

   879 

   880 	CPUUpdateRender();

   881 	CPUUpdateRenderBuffers(true);

   882 	CPUUpdateWindow0();

   883 	CPUUpdateWindow1();

   884 	gbaSaveType = 0;

   885 	switch (saveType)

   886 	{

   887 	case 0:

   888 		cpuSaveGameFunc = flashSaveDecide;

   889 		break;

   890 	case 1:

   891 		cpuSaveGameFunc = sramWrite;

   892 		gbaSaveType		= 1;

   893 		break;

   894 	case 2:

   895 		cpuSaveGameFunc = flashWrite;

   896 		gbaSaveType		= 2;

   897 		break;

   898 	default:

   899 		systemMessage(MSG_UNSUPPORTED_SAVE_TYPE,

   900 		              N_("Unsupported save type %d"), saveType);

   901 		break;

   902 	}

   903 	if (eepromInUse)

   904 		gbaSaveType = 3;

   905 

   906 	systemSaveUpdateCounter = SYSTEM_SAVE_NOT_UPDATED;

   907 

   908 	if (version >= SAVE_GAME_VERSION_9) // new to re-recording version:

   909 	{

   910 		extern int32 sensorX, sensorY; // from SDL.cpp

   911 		utilGzRead(gzFile, &sensorX, sizeof(sensorX));

   912 		utilGzRead(gzFile, &sensorY, sizeof(sensorY));

   913 

   914 		bool8 movieSnapshot;

   915 		utilGzRead(gzFile, &movieSnapshot, sizeof(movieSnapshot));

   916 		if (VBAMovieActive() && !movieSnapshot)

   917 		{

   918 			systemMessage(0, N_("Can't load a non-movie snapshot while a movie is active."));

   919 			goto failedLoad;

   920 		}

   921 

   922 		if (movieSnapshot) // even if a movie isn't active we still want to parse through this in case other stuff is added

   923 		                   // later on in the save format

   924 		{

   925 			uint32 movieInputDataSize = 0;

   926 			utilGzRead(gzFile, &movieInputDataSize, sizeof(movieInputDataSize));

   927 			uint8 *local_movie_data = new uint8[movieInputDataSize];

   928 			int	   readBytes		= utilGzRead(gzFile, local_movie_data, movieInputDataSize);

   929 			if (readBytes != movieInputDataSize)

   930 			{

   931 				systemMessage(0, N_("Corrupt movie snapshot."));

   932 				if (local_movie_data)

   933 					delete [] local_movie_data;

   934 				goto failedLoad;

   935 			}

   936 			int code = VBAMovieUnfreeze(local_movie_data, movieInputDataSize);

   937 			if (local_movie_data)

   938 				delete [] local_movie_data;

   939 			if (code != MOVIE_SUCCESS && VBAMovieActive())

   940 			{

   941 				char errStr [1024];

   942 				strcpy(errStr, "Failed to load movie snapshot");

   943 				switch (code)

   944 				{

   945 				case MOVIE_NOT_FROM_THIS_MOVIE:

   946 					strcat(errStr, ";\nSnapshot not from this movie"); break;

   947 				case MOVIE_NOT_FROM_A_MOVIE:

   948 					strcat(errStr, ";\nNot a movie snapshot"); break;                   // shouldn't get here...

   949 				case MOVIE_SNAPSHOT_INCONSISTENT:

   950 					strcat(errStr, ";\nSnapshot inconsistent with movie"); break;

   951 				case MOVIE_WRONG_FORMAT:

   952 					strcat(errStr, ";\nWrong format"); break;

   953 				}

   954 				strcat(errStr, ".");

   955 				systemMessage(0, N_(errStr));

   956 				goto failedLoad;

   957 			}

   958 		}

   959 		utilGzRead(gzFile, &GBASystemCounters.frameCount, sizeof(GBASystemCounters.frameCount));

   960 	}

   961 	if (version >= SAVE_GAME_VERSION_10)

   962 	{

   963 		utilGzRead(gzFile, memoryWait, 16 * sizeof(int32));

   964 		utilGzRead(gzFile, memoryWait32, 16 * sizeof(int32));

   965 		utilGzRead(gzFile, memoryWaitSeq, 16 * sizeof(int32));

   966 		utilGzRead(gzFile, memoryWaitSeq32, 16 * sizeof(int32));

   967 		utilGzRead(gzFile, memoryWaitFetch, 16 * sizeof(int32));

   968 		utilGzRead(gzFile, memoryWaitFetch32, 16 * sizeof(int32));

   969 	}

   970 	if (version >= SAVE_GAME_VERSION_11)

   971 	{

   972 		utilGzRead(gzFile, &prefetchActive, sizeof(bool8));

   973 		//if(prefetchActive && !prefetchPrevActive) systemScreenMessage("pre-fetch enabled",3,600);

   974 		//if(!prefetchActive && prefetchPrevActive) systemScreenMessage("pre-fetch disabled",3,600);

   975 		utilGzRead(gzFile, &prefetchPrevActive, sizeof(bool8));

   976 		utilGzRead(gzFile, &prefetchApplies, sizeof(bool8));

   977 	}

   978 	if (version >= SAVE_GAME_VERSION_12)

   979 	{

   980 		utilGzRead(gzFile, &memLagTempEnabled, sizeof(bool8)); // necessary

   981 		utilGzRead(gzFile, &speedHack, sizeof(bool8)); // just in case it's ever used...

   982 	}

   983 	if (version >= SAVE_GAME_VERSION_13)

   984 	{

   985 		utilGzRead(gzFile, &GBASystemCounters.lagCount, sizeof(GBASystemCounters.lagCount));

   986 		utilGzRead(gzFile, &GBASystemCounters.lagged, sizeof(GBASystemCounters.lagged));

   987 		utilGzRead(gzFile, &GBASystemCounters.laggedLast, sizeof(GBASystemCounters.laggedLast));

   988 	}

   989 

   990 	if (backupSafe)

   991 	{

   992 		remove(tempBackupName);

   993 		tempFailCount = 0;

   994 	}

   995 	systemSetJoypad(0, ~P1 & 0x3FF);

   996 	VBAUpdateButtonPressDisplay();

   997 	VBAUpdateFrameCountDisplay();

   998 	systemRefreshScreen();

   999 	return true;

  1000 

  1001 failedLoad:

  1002 	if (backupSafe)

  1003 	{

  1004 		tempFailCount++;

  1005 		if (tempFailCount < 3) // fail no more than 2 times in a row

  1006 			CPUReadState(tempBackupName);

  1007 		remove(tempBackupName);

  1008 	}

  1009 	return false;

  1010 }

  1011 

  1012 bool CPUReadMemState(char *memory, int available)

  1013 {

  1014 	gzFile gzFile = utilMemGzOpen(memory, available, "r");

  1015 

  1016 	backupSafe = false;

  1017 	bool res = CPUReadStateFromStream(gzFile);

  1018 	backupSafe = true;

  1019 

  1020 	utilGzClose(gzFile);

  1021 

  1022 	return res;

  1023 }

  1024 

  1025 bool CPUReadState(const char *file)

  1026 {

  1027 	gzFile gzFile = utilGzOpen(file, "rb");

  1028 

  1029 	if (gzFile == NULL)

  1030 		return false;

  1031 

  1032 	bool res = CPUReadStateFromStream(gzFile);

  1033 

  1034 	utilGzClose(gzFile);

  1035 

  1036 	return res;

  1037 }

  1038 

  1039 bool CPUExportEepromFile(const char *fileName)

  1040 {

  1041 	if (eepromInUse)

  1042 	{

  1043 		FILE *file = fopen(fileName, "wb");

  1044 

  1045 		if (!file)

  1046 		{

  1047 			systemMessage(MSG_ERROR_CREATING_FILE, N_("Error creating file %s"),

  1048 			              fileName);

  1049 			return false;

  1050 		}

  1051 

  1052 		for (int i = 0; i < eepromSize; )

  1053 		{

  1054 			for (int j = 0; j < 8; j++)

  1055 			{

  1056 				if (fwrite(&eepromData[i + 7 - j], 1, 1, file) != 1)

  1057 				{

  1058 					fclose(file);

  1059 					return false;

  1060 				}

  1061 			}

  1062 			i += 8;

  1063 		}

  1064 		fclose(file);

  1065 	}

  1066 	return true;

  1067 }

  1068 

  1069 bool CPUWriteBatteryToStream(gzFile gzFile)

  1070 {

  1071 	if (!gzFile)

  1072 		return false;

  1073 

  1074 	utilWriteInt(gzFile, SAVE_GAME_VERSION);

  1075 

  1076 	// for simplicity, we put both types of battery files should be in the stream, even if one's empty

  1077 	eepromSaveGame(gzFile);

  1078 	flashSaveGame(gzFile);

  1079 

  1080 	return true;

  1081 }

  1082 

  1083 bool CPUWriteBatteryFile(const char *fileName)

  1084 {

  1085 	if (gbaSaveType == 0)

  1086 	{

  1087 		if (eepromInUse)

  1088 			gbaSaveType = 3;

  1089 		else

  1090 			switch (saveType)

  1091 			{

  1092 			case 1:

  1093 				gbaSaveType = 1;

  1094 				break;

  1095 			case 2:

  1096 				gbaSaveType = 2;

  1097 				break;

  1098 			}

  1099 	}

  1100 

  1101 	if (gbaSaveType)

  1102 	{

  1103 		FILE *file = fopen(fileName, "wb");

  1104 

  1105 		if (!file)

  1106 		{

  1107 			systemMessage(MSG_ERROR_CREATING_FILE, N_("Error creating file %s"),

  1108 			              fileName);

  1109 			return false;

  1110 		}

  1111 

  1112 		// only save if Flash/Sram in use or EEprom in use

  1113 		if (gbaSaveType != 3)

  1114 		{

  1115 			if (gbaSaveType == 2)

  1116 			{

  1117 				if (fwrite(flashSaveMemory, 1, flashSize, file) != (size_t)flashSize)

  1118 				{

  1119 					fclose(file);

  1120 					return false;

  1121 				}

  1122 			}

  1123 			else

  1124 			{

  1125 				if (fwrite(flashSaveMemory, 1, 0x10000, file) != 0x10000)

  1126 				{

  1127 					fclose(file);

  1128 					return false;

  1129 				}

  1130 			}

  1131 		}

  1132 		else

  1133 		{

  1134 			if (fwrite(eepromData, 1, eepromSize, file) != (size_t)eepromSize)

  1135 			{

  1136 				fclose(file);

  1137 				return false;

  1138 			}

  1139 		}

  1140 		fclose(file);

  1141 	}

  1142 

  1143 	return true;

  1144 }

  1145 

  1146 bool CPUReadGSASnapshot(const char *fileName)

  1147 {

  1148 	int	  i;

  1149 	FILE *file = fopen(fileName, "rb");

  1150 

  1151 	if (!file)

  1152 	{

  1153 		systemMessage(MSG_CANNOT_OPEN_FILE, N_("Cannot open file %s"), fileName);

  1154 		return false;

  1155 	}

  1156 

  1157 	// check file size to know what we should read

  1158 	fseek(file, 0, SEEK_END);

  1159 

  1160 	// long size = ftell(file);

  1161 	fseek(file, 0x0, SEEK_SET);

  1162 	fread(&i, 1, 4, file);

  1163 	fseek(file, i, SEEK_CUR); // Skip SharkPortSave

  1164 	fseek(file, 4, SEEK_CUR); // skip some sort of flag

  1165 	fread(&i, 1, 4, file); // name length

  1166 	fseek(file, i, SEEK_CUR); // skip name

  1167 	fread(&i, 1, 4, file); // desc length

  1168 	fseek(file, i, SEEK_CUR); // skip desc

  1169 	fread(&i, 1, 4, file); // notes length

  1170 	fseek(file, i, SEEK_CUR); // skip notes

  1171 	int saveSize;

  1172 	fread(&saveSize, 1, 4, file); // read length

  1173 	saveSize -= 0x1c; // remove header size

  1174 	char buffer[17];

  1175 	char buffer2[17];

  1176 	fread(buffer, 1, 16, file);

  1177 	buffer[16] = 0;

  1178 	for (i = 0; i < 16; i++)

  1179 		if (buffer[i] < 32)

  1180 			buffer[i] = 32;

  1181 	memcpy(buffer2, &rom[0xa0], 16);

  1182 	buffer2[16] = 0;

  1183 	for (i = 0; i < 16; i++)

  1184 		if (buffer2[i] < 32)

  1185 			buffer2[i] = 32;

  1186 	if (memcmp(buffer, buffer2, 16))

  1187 	{

  1188 		systemMessage(MSG_CANNOT_IMPORT_SNAPSHOT_FOR,

  1189 		              N_("Cannot import snapshot for %s. Current game is %s"),

  1190 		              buffer,

  1191 		              buffer2);

  1192 		fclose(file);

  1193 		return false;

  1194 	}

  1195 	fseek(file, 12, SEEK_CUR); // skip some flags

  1196 	if (saveSize >= 65536)

  1197 	{

  1198 		if (fread(flashSaveMemory, 1, saveSize, file) != (size_t)saveSize)

  1199 		{

  1200 			fclose(file);

  1201 			return false;

  1202 		}

  1203 	}

  1204 	else

  1205 	{

  1206 		systemMessage(MSG_UNSUPPORTED_SNAPSHOT_FILE,

  1207 		              N_("Unsupported snapshot file %s"),

  1208 		              fileName);

  1209 		fclose(file);

  1210 		return false;

  1211 	}

  1212 	fclose(file);

  1213 	CPUReset();

  1214 	return true;

  1215 }

  1216 

  1217 bool CPUWriteGSASnapshot(const char *fileName,

  1218                          const char *title,

  1219                          const char *desc,

  1220                          const char *notes)

  1221 {

  1222 	FILE *file = fopen(fileName, "wb");

  1223 

  1224 	if (!file)

  1225 	{

  1226 		systemMessage(MSG_CANNOT_OPEN_FILE, N_("Cannot open file %s"), fileName);

  1227 		return false;

  1228 	}

  1229 

  1230 	u8 buffer[17];

  1231 

  1232 	utilPutDword(buffer, 0x0d); // SharkPortSave length

  1233 	fwrite(buffer, 1, 4, file);

  1234 	fwrite("SharkPortSave", 1, 0x0d, file);

  1235 	utilPutDword(buffer, 0x000f0000);

  1236 	fwrite(buffer, 1, 4, file); // save type 0x000f0000 = GBA save

  1237 	utilPutDword(buffer, strlen(title));

  1238 	fwrite(buffer, 1, 4, file); // title length

  1239 	fwrite(title, 1, strlen(title), file);

  1240 	utilPutDword(buffer, strlen(desc));

  1241 	fwrite(buffer, 1, 4, file); // desc length

  1242 	fwrite(desc, 1, strlen(desc), file);

  1243 	utilPutDword(buffer, strlen(notes));

  1244 	fwrite(buffer, 1, 4, file); // notes length

  1245 	fwrite(notes, 1, strlen(notes), file);

  1246 	int saveSize = 0x10000;

  1247 	if (gbaSaveType == 2)

  1248 		saveSize = flashSize;

  1249 	int totalSize = saveSize + 0x1c;

  1250 

  1251 	utilPutDword(buffer, totalSize); // length of remainder of save - CRC

  1252 	fwrite(buffer, 1, 4, file);

  1253 

  1254 	char temp[0x2001c];

  1255 	memset(temp, 0, 28);

  1256 	memcpy(temp, &rom[0xa0], 16); // copy internal name

  1257 	temp[0x10] = rom[0xbe]; // reserved area (old checksum)

  1258 	temp[0x11] = rom[0xbf]; // reserved area (old checksum)

  1259 	temp[0x12] = rom[0xbd]; // complement check

  1260 	temp[0x13] = rom[0xb0]; // maker

  1261 	temp[0x14] = 1; // 1 save ?

  1262 	memcpy(&temp[0x1c], flashSaveMemory, saveSize); // copy save

  1263 	fwrite(temp, 1, totalSize, file); // write save + header

  1264 	u32 crc = 0;

  1265 

  1266 	for (int i = 0; i < totalSize; i++)

  1267 	{

  1268 		crc += ((u32)temp[i] << (crc % 0x18));

  1269 	}

  1270 

  1271 	utilPutDword(buffer, crc);

  1272 	fwrite(buffer, 1, 4, file); // CRC?

  1273 

  1274 	fclose(file);

  1275 	return true;

  1276 }

  1277 

  1278 bool CPUImportEepromFile(const char *fileName)

  1279 {

  1280 	FILE *file = fopen(fileName, "rb");

  1281 

  1282 	if (!file)

  1283 		return false;

  1284 

  1285 	// check file size to know what we should read

  1286 	fseek(file, 0, SEEK_END);

  1287 

  1288 	long size = ftell(file);

  1289 	fseek(file, 0, SEEK_SET);

  1290 	if (size == 512 || size == 0x2000)

  1291 	{

  1292 		if (fread(eepromData, 1, size, file) != (size_t)size)

  1293 		{

  1294 			fclose(file);

  1295 			return false;

  1296 		}

  1297 		for (int i = 0; i < size; )

  1298 		{

  1299 			u8 tmp = eepromData[i];

  1300 			eepromData[i]	  = eepromData[7 - i];

  1301 			eepromData[7 - i] = tmp;

  1302 			i++;

  1303 			tmp = eepromData[i];

  1304 			eepromData[i]	  = eepromData[7 - i];

  1305 			eepromData[7 - i] = tmp;

  1306 			i++;

  1307 			tmp = eepromData[i];

  1308 			eepromData[i]	  = eepromData[7 - i];

  1309 			eepromData[7 - i] = tmp;

  1310 			i++;

  1311 			tmp = eepromData[i];

  1312 			eepromData[i]	  = eepromData[7 - i];

  1313 			eepromData[7 - i] = tmp;

  1314 			i++;

  1315 			i += 4;

  1316 		}

  1317 	}

  1318 	else

  1319 	{

  1320 		fclose(file);

  1321 		return false;

  1322 	}

  1323 	fclose(file);

  1324 	return true;

  1325 }

  1326 

  1327 bool CPUReadBatteryFromStream(gzFile gzFile)

  1328 {

  1329 	if (!gzFile)

  1330 		return false;

  1331 

  1332 	int version = utilReadInt(gzFile);

  1333 

  1334 	// for simplicity, we put both types of battery files should be in the stream, even if one's empty

  1335 	eepromReadGame(gzFile, version);

  1336 	flashReadGame(gzFile, version);

  1337 

  1338 	return true;

  1339 }

  1340 

  1341 bool CPUReadBatteryFile(const char *fileName)

  1342 {

  1343 	FILE *file = fopen(fileName, "rb");

  1344 

  1345 	if (!file)

  1346 		return false;

  1347 

  1348 	// check file size to know what we should read

  1349 	fseek(file, 0, SEEK_END);

  1350 

  1351 	long size = ftell(file);

  1352 	fseek(file, 0, SEEK_SET);

  1353 	systemSaveUpdateCounter = SYSTEM_SAVE_NOT_UPDATED;

  1354 

  1355 	if (size == 512 || size == 0x2000)

  1356 	{

  1357 		if (fread(eepromData, 1, size, file) != (size_t)size)

  1358 		{

  1359 			fclose(file);

  1360 			return false;

  1361 		}

  1362 	}

  1363 	else

  1364 	{

  1365 		if (size == 0x20000)

  1366 		{

  1367 			if (fread(flashSaveMemory, 1, 0x20000, file) != 0x20000)

  1368 			{

  1369 				fclose(file);

  1370 				return false;

  1371 			}

  1372 			flashSetSize(0x20000);

  1373 		}

  1374 		else

  1375 		{

  1376 			if (fread(flashSaveMemory, 1, 0x10000, file) != 0x10000)

  1377 			{

  1378 				fclose(file);

  1379 				return false;

  1380 			}

  1381 			flashSetSize(0x10000);

  1382 		}

  1383 	}

  1384 	fclose(file);

  1385 	return true;

  1386 }

  1387 

  1388 bool CPUWritePNGFile(const char *fileName)

  1389 {

  1390 	return utilWritePNGFile(fileName, 240, 160, pix);

  1391 }

  1392 

  1393 bool CPUWriteBMPFile(const char *fileName)

  1394 {

  1395 	return utilWriteBMPFile(fileName, 240, 160, pix);

  1396 }

  1397 

  1398 void CPUCleanUp()

  1399 {

  1400 	newFrame	  = true;

  1401 

  1402 	GBASystemCounters.frameCount = 0;

  1403 	GBASystemCounters.lagCount	 = 0;

  1404 	GBASystemCounters.extraCount = 0;

  1405 	GBASystemCounters.lagged	 = true;

  1406 	GBASystemCounters.laggedLast = true;

  1407 

  1408 #ifdef PROFILING

  1409 	if (profilingTicksReload)

  1410 	{

  1411 		profCleanup();

  1412 	}

  1413 #endif

  1414 

  1415 #if (defined(WIN32) && !defined(SDL))

  1416 	#define FreeMappedMem(name, mapName, offset) \

  1417 	if (name != NULL) { \

  1418 		UnmapViewOfFile((name) - (offset)); \

  1419 		name = NULL; \

  1420 		CloseHandle(mapName); \

  1421 	}

  1422 #else

  1423 	#define FreeMappedMem(name, mapName, offset) \

  1424 	if (name != NULL) { \

  1425 		free(name); \

  1426 		name = NULL; \

  1427 	}

  1428 #endif

  1429 

  1430 	FreeMappedMem(rom, mapROM, 0);

  1431 	FreeMappedMem(vram, mapVRAM, 0);

  1432 	FreeMappedMem(paletteRAM, mapPALETTERAM, 0);

  1433 	FreeMappedMem(internalRAM, mapIRAM, 0);

  1434 	FreeMappedMem(workRAM, mapWORKRAM, 0);

  1435 	FreeMappedMem(bios, mapBIOS, 0);

  1436 	FreeMappedMem(pix, mapPIX, 4);

  1437 	FreeMappedMem(oam, mapOAM, 0);

  1438 	FreeMappedMem(ioMem, mapIOMEM, 0);

  1439 

  1440 	eepromErase();

  1441 	flashErase();

  1442 

  1443 	elfCleanUp();

  1444 

  1445 	systemSaveUpdateCounter = SYSTEM_SAVE_NOT_UPDATED;

  1446 

  1447 	systemClearJoypads();

  1448 	systemResetSensor();

  1449 

  1450 //	gbaLastTime = gbaFrameCount = 0;

  1451 	systemRefreshScreen();

  1452 }

  1453 

  1454 int CPULoadRom(const char *szFile)

  1455 {

  1456 	int size = 0x2000000;

  1457 

  1458 	if (rom != NULL)

  1459 	{

  1460 		CPUCleanUp();

  1461 	}

  1462 

  1463 	systemSaveUpdateCounter = SYSTEM_SAVE_NOT_UPDATED;

  1464 

  1465 	// size+4 is so RAM search and watch are safe to read any byte in the allocated region as a 4-byte int

  1466 #if (defined(WIN32) && !defined(SDL))

  1467 	#define AllocMappedMem(name, mapName, nameStr, size, useCalloc, offset) \

  1468 	mapName = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, (size) + (offset) + (4), nameStr); \

  1469 	if ((mapName) && GetLastError() == ERROR_ALREADY_EXISTS) { \

  1470 		CloseHandle(mapName); \

  1471 		mapName = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, (size) + (offset) + (4), NULL); \

  1472 	} \

  1473 	name = (u8 *)MapViewOfFile(mapName, FILE_MAP_WRITE, 0, 0, 0) + (offset); \

  1474 	if ((name) == NULL) { \

  1475 		systemMessage(MSG_OUT_OF_MEMORY, N_("Failed to allocate memory for %s"), nameStr); \

  1476 		CPUCleanUp(); \

  1477 		return 0; \

  1478 	} \

  1479 	memset(name, 0, size + 4);

  1480 #else

  1481 	#define AllocMappedMem(name, mapName, nameStr, size, useCalloc, offset) \

  1482 	name = (u8 *)(useCalloc ? calloc(1, size + 4) : malloc(size + 4)); \

  1483 	if ((name) == NULL) { \

  1484 		systemMessage(MSG_OUT_OF_MEMORY, N_("Failed to allocate memory for %s"), nameStr); \

  1485 		CPUCleanUp(); \

  1486 		return 0; \

  1487 	} \

  1488 	memset(name, 0, size + 4);

  1489 #endif

  1490 

  1491 	AllocMappedMem(rom, mapROM, "vbaROM", 0x2000000, false, 0);

  1492 	AllocMappedMem(workRAM, mapWORKRAM, "vbaWORKRAM", 0x40000, true, 0);

  1493 

  1494 	u8 *whereToLoad = rom;

  1495 	if (cpuIsMultiBoot)

  1496 		whereToLoad = workRAM;

  1497 

  1498 	if (utilIsELF(szFile))

  1499 	{

  1500 		FILE *f = fopen(szFile, "rb");

  1501 		if (!f)

  1502 		{

  1503 			systemMessage(MSG_ERROR_OPENING_IMAGE, N_("Error opening image %s"),

  1504 			              szFile);

  1505 			FreeMappedMem(rom, mapROM, 0);

  1506 			FreeMappedMem(workRAM, mapWORKRAM, 0);

  1507 			return 0;

  1508 		}

  1509 		bool res = elfRead(szFile, size, f);

  1510 		if (!res || size == 0)

  1511 		{

  1512 			FreeMappedMem(rom, mapROM, 0);

  1513 			FreeMappedMem(workRAM, mapWORKRAM, 0);

  1514 			elfCleanUp();

  1515 			return 0;

  1516 		}

  1517 	}

  1518 	else if (!utilLoad(szFile,

  1519 	                   utilIsGBAImage,

  1520 	                   whereToLoad,

  1521 	                   size))

  1522 	{

  1523 		FreeMappedMem(rom, mapROM, 0);

  1524 		FreeMappedMem(workRAM, mapWORKRAM, 0);

  1525 		return 0;

  1526 	}

  1527 

  1528 	u16 *temp = (u16 *)(rom + ((size + 1) & ~1));

  1529 	int	 i;

  1530 	for (i = (size + 1) & ~1; i < 0x2000000; i += 2)

  1531 	{

  1532 		WRITE16LE(temp, (i >> 1) & 0xFFFF);

  1533 		temp++;

  1534 	}

  1535 

  1536 	AllocMappedMem(bios, mapBIOS, "vbaBIOS", 0x4000, true, 0);

  1537 	AllocMappedMem(internalRAM, mapIRAM, "vbaIRAM", 0x8000, true, 0);

  1538 	AllocMappedMem(paletteRAM, mapPALETTERAM, "vbaPALETTERAM", 0x400, true, 0);

  1539 	AllocMappedMem(vram, mapVRAM, "vbaVRAM", 0x20000, true, 0);

  1540 	AllocMappedMem(oam, mapOAM, "vbaOAM", 0x400, true, 0);

  1541 

  1542 	// HACK: +4 at start to accomodate the 2xSaI filter reading out of bounds of the leftmost pixel

  1543 	AllocMappedMem(pix, mapPIX, "vbaPIX", 4 * 241 * 162, true, 4);

  1544 	AllocMappedMem(ioMem, mapIOMEM, "vbaIOMEM", 0x400, true, 0);

  1545 

  1546 	CPUUpdateRenderBuffers(true);

  1547 

  1548 	return size;

  1549 }

  1550 

  1551 void CPUUpdateRender()

  1552 {

  1553 	switch (DISPCNT & 7)

  1554 	{

  1555 	case 0:

  1556 		if ((!fxOn && !windowOn && !(layerEnable & 0x8000)) ||

  1557 		    cpuDisableSfx)

  1558 			renderLine = mode0RenderLine;

  1559 		else if (fxOn && !windowOn && !(layerEnable & 0x8000))

  1560 			renderLine = mode0RenderLineNoWindow;

  1561 		else

  1562 			renderLine = mode0RenderLineAll;

  1563 		break;

  1564 	case 1:

  1565 		if ((!fxOn && !windowOn && !(layerEnable & 0x8000)) ||

  1566 		    cpuDisableSfx)

  1567 			renderLine = mode1RenderLine;

  1568 		else if (fxOn && !windowOn && !(layerEnable & 0x8000))

  1569 			renderLine = mode1RenderLineNoWindow;

  1570 		else

  1571 			renderLine = mode1RenderLineAll;

  1572 		break;

  1573 	case 2:

  1574 		if ((!fxOn && !windowOn && !(layerEnable & 0x8000)) ||

  1575 		    cpuDisableSfx)

  1576 			renderLine = mode2RenderLine;

  1577 		else if (fxOn && !windowOn && !(layerEnable & 0x8000))

  1578 			renderLine = mode2RenderLineNoWindow;

  1579 		else

  1580 			renderLine = mode2RenderLineAll;

  1581 		break;

  1582 	case 3:

  1583 		if ((!fxOn && !windowOn && !(layerEnable & 0x8000)) ||

  1584 		    cpuDisableSfx)

  1585 			renderLine = mode3RenderLine;

  1586 		else if (fxOn && !windowOn && !(layerEnable & 0x8000))

  1587 			renderLine = mode3RenderLineNoWindow;

  1588 		else

  1589 			renderLine = mode3RenderLineAll;

  1590 		break;

  1591 	case 4:

  1592 		if ((!fxOn && !windowOn && !(layerEnable & 0x8000)) ||

  1593 		    cpuDisableSfx)

  1594 			renderLine = mode4RenderLine;

  1595 		else if (fxOn && !windowOn && !(layerEnable & 0x8000))

  1596 			renderLine = mode4RenderLineNoWindow;

  1597 		else

  1598 			renderLine = mode4RenderLineAll;

  1599 		break;

  1600 	case 5:

  1601 		if ((!fxOn && !windowOn && !(layerEnable & 0x8000)) ||

  1602 		    cpuDisableSfx)

  1603 			renderLine = mode5RenderLine;

  1604 		else if (fxOn && !windowOn && !(layerEnable & 0x8000))

  1605 			renderLine = mode5RenderLineNoWindow;

  1606 		else

  1607 			renderLine = mode5RenderLineAll;

  1608 	default:

  1609 		break;

  1610 	}

  1611 }

  1612 

  1613 void CPUUpdateCPSR()

  1614 {

  1615 	u32 CPSR = reg[16].I & 0x40;

  1616 	if (N_FLAG)

  1617 		CPSR |= 0x80000000;

  1618 	if (Z_FLAG)

  1619 		CPSR |= 0x40000000;

  1620 	if (C_FLAG)

  1621 		CPSR |= 0x20000000;

  1622 	if (V_FLAG)

  1623 		CPSR |= 0x10000000;

  1624 	if (!armState)

  1625 		CPSR |= 0x00000020;

  1626 	if (!armIrqEnable)

  1627 		CPSR |= 0x80;

  1628 	CPSR	 |= (armMode & 0x1F);

  1629 	reg[16].I = CPSR;

  1630 }

  1631 

  1632 void CPUUpdateFlags(bool breakLoop)

  1633 {

  1634 	u32 CPSR = reg[16].I;

  1635 

  1636 	N_FLAG		 = (CPSR & 0x80000000) ? true : false;

  1637 	Z_FLAG		 = (CPSR & 0x40000000) ? true : false;

  1638 	C_FLAG		 = (CPSR & 0x20000000) ? true : false;

  1639 	V_FLAG		 = (CPSR & 0x10000000) ? true : false;

  1640 	armState	 = (CPSR & 0x20) ? false : true;

  1641 	armIrqEnable = (CPSR & 0x80) ? false : true;

  1642 	if (breakLoop)

  1643 	{

  1644 		if (armIrqEnable && (IF & IE) && (IME & 1))

  1645 		{

  1646 			CPU_BREAK_LOOP_2;

  1647 		}

  1648 	}

  1649 }

  1650 

  1651 void CPUUpdateFlags()

  1652 {

  1653 	CPUUpdateFlags(true);

  1654 }

  1655 

  1656 #ifdef WORDS_BIGENDIAN

  1657 static void CPUSwap(volatile u32 *a, volatile u32 *b)

  1658 {

  1659 	volatile u32 c = *b;

  1660 	*b = *a;

  1661 	*a = c;

  1662 }

  1663 

  1664 #else

  1665 static void CPUSwap(u32 *a, u32 *b)

  1666 {

  1667 	u32 c = *b;

  1668 	*b = *a;

  1669 	*a = c;

  1670 }

  1671 

  1672 #endif

  1673 

  1674 void CPUSwitchMode(int mode, bool saveState, bool breakLoop)

  1675 {

  1676 	//  if(armMode == mode)

  1677 	//    return;

  1678 

  1679 	CPUUpdateCPSR();

  1680 

  1681 	switch (armMode)

  1682 	{

  1683 	case 0x10:

  1684 	case 0x1F:

  1685 		reg[R13_USR].I = reg[13].I;

  1686 		reg[R14_USR].I = reg[14].I;

  1687 		reg[17].I	   = reg[16].I;

  1688 		break;

  1689 	case 0x11:

  1690 		CPUSwap(&reg[R8_FIQ].I, &reg[8].I);

  1691 		CPUSwap(&reg[R9_FIQ].I, &reg[9].I);

  1692 		CPUSwap(&reg[R10_FIQ].I, &reg[10].I);

  1693 		CPUSwap(&reg[R11_FIQ].I, &reg[11].I);

  1694 		CPUSwap(&reg[R12_FIQ].I, &reg[12].I);

  1695 		reg[R13_FIQ].I	= reg[13].I;

  1696 		reg[R14_FIQ].I	= reg[14].I;

  1697 		reg[SPSR_FIQ].I = reg[17].I;

  1698 		break;

  1699 	case 0x12:

  1700 		reg[R13_IRQ].I	= reg[13].I;

  1701 		reg[R14_IRQ].I	= reg[14].I;

  1702 		reg[SPSR_IRQ].I =  reg[17].I;

  1703 		break;

  1704 	case 0x13:

  1705 		reg[R13_SVC].I	= reg[13].I;

  1706 		reg[R14_SVC].I	= reg[14].I;

  1707 		reg[SPSR_SVC].I =  reg[17].I;

  1708 		break;

  1709 	case 0x17:

  1710 		reg[R13_ABT].I	= reg[13].I;

  1711 		reg[R14_ABT].I	= reg[14].I;

  1712 		reg[SPSR_ABT].I =  reg[17].I;

  1713 		break;

  1714 	case 0x1b:

  1715 		reg[R13_UND].I	= reg[13].I;

  1716 		reg[R14_UND].I	= reg[14].I;

  1717 		reg[SPSR_UND].I =  reg[17].I;

  1718 		break;

  1719 	}

  1720 

  1721 	u32 CPSR = reg[16].I;

  1722 	u32 SPSR = reg[17].I;

  1723 

  1724 	switch (mode)

  1725 	{

  1726 	case 0x10:

  1727 	case 0x1F:

  1728 		reg[13].I = reg[R13_USR].I;

  1729 		reg[14].I = reg[R14_USR].I;

  1730 		reg[16].I = SPSR;

  1731 		break;

  1732 	case 0x11:

  1733 		CPUSwap(&reg[8].I, &reg[R8_FIQ].I);

  1734 		CPUSwap(&reg[9].I, &reg[R9_FIQ].I);

  1735 		CPUSwap(&reg[10].I, &reg[R10_FIQ].I);

  1736 		CPUSwap(&reg[11].I, &reg[R11_FIQ].I);

  1737 		CPUSwap(&reg[12].I, &reg[R12_FIQ].I);

  1738 		reg[13].I = reg[R13_FIQ].I;

  1739 		reg[14].I = reg[R14_FIQ].I;

  1740 		if (saveState)

  1741 			reg[17].I = CPSR;

  1742 		else

  1743 			reg[17].I = reg[SPSR_FIQ].I;

  1744 		break;

  1745 	case 0x12:

  1746 		reg[13].I = reg[R13_IRQ].I;

  1747 		reg[14].I = reg[R14_IRQ].I;

  1748 		reg[16].I = SPSR;

  1749 		if (saveState)

  1750 			reg[17].I = CPSR;

  1751 		else

  1752 			reg[17].I = reg[SPSR_IRQ].I;

  1753 		break;

  1754 	case 0x13:

  1755 		reg[13].I = reg[R13_SVC].I;

  1756 		reg[14].I = reg[R14_SVC].I;

  1757 		reg[16].I = SPSR;

  1758 		if (saveState)

  1759 			reg[17].I = CPSR;

  1760 		else

  1761 			reg[17].I = reg[SPSR_SVC].I;

  1762 		break;

  1763 	case 0x17:

  1764 		reg[13].I = reg[R13_ABT].I;

  1765 		reg[14].I = reg[R14_ABT].I;

  1766 		reg[16].I = SPSR;

  1767 		if (saveState)

  1768 			reg[17].I = CPSR;

  1769 		else

  1770 			reg[17].I = reg[SPSR_ABT].I;

  1771 		break;

  1772 	case 0x1b:

  1773 		reg[13].I = reg[R13_UND].I;

  1774 		reg[14].I = reg[R14_UND].I;

  1775 		reg[16].I = SPSR;

  1776 		if (saveState)

  1777 			reg[17].I = CPSR;

  1778 		else

  1779 			reg[17].I = reg[SPSR_UND].I;

  1780 		break;

  1781 	default:

  1782 		systemMessage(MSG_UNSUPPORTED_ARM_MODE, N_("Unsupported ARM mode %02x"), mode);

  1783 		break;

  1784 	}

  1785 	armMode = mode;

  1786 	CPUUpdateFlags(breakLoop);

  1787 	CPUUpdateCPSR();

  1788 }

  1789 

  1790 void CPUSwitchMode(int mode, bool saveState)

  1791 {

  1792 	CPUSwitchMode(mode, saveState, true);

  1793 }

  1794 

  1795 void CPUUndefinedException()

  1796 {

  1797 	u32	 PC = reg[15].I;

  1798 	bool savedArmState = armState;

  1799 	CPUSwitchMode(0x1b, true, false);

  1800 	reg[14].I	 = PC - (savedArmState ? 4 : 2);

  1801 	reg[15].I	 = 0x04;

  1802 	armState	 = true;

  1803 	armIrqEnable = false;

  1804 	armNextPC	 = 0x04;

  1805 	reg[15].I	+= 4;

  1806 }

  1807 

  1808 void CPUSoftwareInterrupt()

  1809 {

  1810 	u32	 PC = reg[15].I;

  1811 	bool savedArmState = armState;

  1812 	CPUSwitchMode(0x13, true, false);

  1813 	reg[14].I	 = PC - (savedArmState ? 4 : 2);

  1814 	reg[15].I	 = 0x08;

  1815 	armState	 = true;

  1816 	armIrqEnable = false;

  1817 	armNextPC	 = 0x08;

  1818 	reg[15].I	+= 4;

  1819 }

  1820 

  1821 void CPUSoftwareInterrupt(int comment)

  1822 {

  1823 	static bool disableMessage = false;

  1824 	if (armState)

  1825 		comment >>= 16;

  1826 #ifdef BKPT_SUPPORT

  1827 	if (comment == 0xff)

  1828 	{

  1829 		extern void (*dbgOutput)(char *, u32);

  1830 		dbgOutput(NULL, reg[0].I);

  1831 		return;

  1832 	}

  1833 #endif

  1834 #ifdef PROFILING

  1835 	if (comment == 0xfe)

  1836 	{

  1837 		profStartup(reg[0].I, reg[1].I);

  1838 		return;

  1839 	}

  1840 	if (comment == 0xfd)

  1841 	{

  1842 		profControl(reg[0].I);

  1843 		return;

  1844 	}

  1845 	if (comment == 0xfc)

  1846 	{

  1847 		profCleanup();

  1848 		return;

  1849 	}

  1850 	if (comment == 0xfb)

  1851 	{

  1852 		profCount();

  1853 		return;

  1854 	}

  1855 #endif

  1856 	if (comment == 0xfa)

  1857 	{

  1858 		agbPrintFlush();

  1859 		return;

  1860 	}

  1861 #ifdef SDL

  1862 	if (comment == 0xf9)

  1863 	{

  1864 		emulating = 0;

  1865 		CPU_BREAK_LOOP_2;

  1866 		return;

  1867 	}

  1868 #endif

  1869 	if (useBios)

  1870 	{

  1871 #ifdef GBA_LOGGING

  1872 		if (systemVerbose & VERBOSE_SWI)

  1873 		{

  1874 			log("SWI: %08x at %08x (0x%08x,0x%08x,0x%08x,VCOUNT = %2d)\n", comment,

  1875 			    armState ? armNextPC - 4 : armNextPC - 2,

  1876 			    reg[0].I,

  1877 			    reg[1].I,

  1878 			    reg[2].I,

  1879 			    VCOUNT);

  1880 		}

  1881 #endif

  1882 		CPUSoftwareInterrupt();

  1883 		return;

  1884 	}

  1885 	// This would be correct, but it causes problems if uncommented

  1886 	//  else {

  1887 	//    biosProtected = 0xe3a02004;

  1888 	//  }

  1889 

  1890 	switch (comment)

  1891 	{

  1892 	case 0x00:

  1893 		BIOS_SoftReset();

  1894 		break;

  1895 	case 0x01:

  1896 		BIOS_RegisterRamReset();

  1897 		break;

  1898 	case 0x02:

  1899 #ifdef GBA_LOGGING

  1900 		if (systemVerbose & VERBOSE_SWI)

  1901 		{

  1902 			log("Halt: (VCOUNT = %2d)\n",

  1903 			    VCOUNT);

  1904 		}

  1905 #endif

  1906 		holdState = true;

  1907 		holdType  = -1;

  1908 		break;

  1909 	case 0x03:

  1910 #ifdef GBA_LOGGING

  1911 		if (systemVerbose & VERBOSE_SWI)

  1912 		{

  1913 			log("Stop: (VCOUNT = %2d)\n",

  1914 			    VCOUNT);

  1915 		}

  1916 #endif

  1917 		holdState = true;

  1918 		holdType  = -1;

  1919 		stopState = true;

  1920 		break;

  1921 	case 0x04:

  1922 #ifdef GBA_LOGGING

  1923 		if (systemVerbose & VERBOSE_SWI)

  1924 		{

  1925 			log("IntrWait: 0x%08x,0x%08x (VCOUNT = %2d)\n",

  1926 			    reg[0].I,

  1927 			    reg[1].I,

  1928 			    VCOUNT);

  1929 		}

  1930 #endif

  1931 		CPUSoftwareInterrupt();

  1932 		break;

  1933 	case 0x05:

  1934 #ifdef GBA_LOGGING

  1935 		if (systemVerbose & VERBOSE_SWI)

  1936 		{

  1937 			log("VBlankIntrWait: (VCOUNT = %2d)\n",

  1938 			    VCOUNT);

  1939 		}

  1940 #endif

  1941 		CPUSoftwareInterrupt();

  1942 		break;

  1943 	case 0x06:

  1944 		CPUSoftwareInterrupt();

  1945 		break;

  1946 	case 0x07:

  1947 		CPUSoftwareInterrupt();

  1948 		break;

  1949 	case 0x08:

  1950 		BIOS_Sqrt();

  1951 		break;

  1952 	case 0x09:

  1953 		BIOS_ArcTan();

  1954 		break;

  1955 	case 0x0A:

  1956 		BIOS_ArcTan2();

  1957 		break;

  1958 	case 0x0B:

  1959 		BIOS_CpuSet();

  1960 		break;

  1961 	case 0x0C:

  1962 		BIOS_CpuFastSet();

  1963 		break;

  1964 	case 0x0E:

  1965 		BIOS_BgAffineSet();

  1966 		break;

  1967 	case 0x0F:

  1968 		BIOS_ObjAffineSet();

  1969 		break;

  1970 	case 0x10:

  1971 		BIOS_BitUnPack();

  1972 		break;

  1973 	case 0x11:

  1974 		BIOS_LZ77UnCompWram();

  1975 		break;

  1976 	case 0x12:

  1977 		BIOS_LZ77UnCompVram();

  1978 		break;

  1979 	case 0x13:

  1980 		BIOS_HuffUnComp();

  1981 		break;

  1982 	case 0x14:

  1983 		BIOS_RLUnCompWram();

  1984 		break;

  1985 	case 0x15:

  1986 		BIOS_RLUnCompVram();

  1987 		break;

  1988 	case 0x16:

  1989 		BIOS_Diff8bitUnFilterWram();

  1990 		break;

  1991 	case 0x17:

  1992 		BIOS_Diff8bitUnFilterVram();

  1993 		break;

  1994 	case 0x18:

  1995 		BIOS_Diff16bitUnFilter();

  1996 		break;

  1997 	case 0x19:

  1998 #ifdef GBA_LOGGING

  1999 		if (systemVerbose & VERBOSE_SWI)

  2000 		{

  2001 			log("SoundBiasSet: 0x%08x (VCOUNT = %2d)\n",

  2002 			    reg[0].I,

  2003 			    VCOUNT);

  2004 		}

  2005 #endif

  2006 		if (reg[0].I)

  2007 			soundPause();

  2008 		else

  2009 			soundResume();

  2010 		break;

  2011 	case 0x1F:

  2012 		BIOS_MidiKey2Freq();

  2013 		break;

  2014 	case 0x2A:

  2015 		BIOS_SndDriverJmpTableCopy();

  2016 	// let it go, because we don't really emulate this function // FIXME (?)

  2017 	default:

  2018 #ifdef GBA_LOGGING

  2019 		if (systemVerbose & VERBOSE_SWI)

  2020 		{

  2021 			log("SWI: %08x at %08x (0x%08x,0x%08x,0x%08x,VCOUNT = %2d)\n", comment,

  2022 			    armState ? armNextPC - 4 : armNextPC - 2,

  2023 			    reg[0].I,

  2024 			    reg[1].I,

  2025 			    reg[2].I,

  2026 			    VCOUNT);

  2027 		}

  2028 #endif

  2029 

  2030 		if (!disableMessage)

  2031 		{

  2032 			systemMessage(MSG_UNSUPPORTED_BIOS_FUNCTION,

  2033 			              N_(

  2034 			                  "Unsupported BIOS function %02x called from %08x. A BIOS file is needed in order to get correct behaviour."),

  2035 			              comment,

  2036 			              armMode ? armNextPC - 4 : armNextPC - 2);

  2037 			disableMessage = true;

  2038 		}

  2039 		break;

  2040 	}

  2041 }

  2042 

  2043 void CPUCompareVCOUNT()

  2044 {

  2045 	if (VCOUNT == (DISPSTAT >> 8))

  2046 	{

  2047 		DISPSTAT |= 4;

  2048 		UPDATE_REG(0x04, DISPSTAT);

  2049 

  2050 		if (DISPSTAT & 0x20)

  2051 		{

  2052 			IF |= 4;

  2053 			UPDATE_REG(0x202, IF);

  2054 		}

  2055 	}

  2056 	else

  2057 	{

  2058 		DISPSTAT &= 0xFFFB;

  2059 		UPDATE_REG(0x4, DISPSTAT);

  2060 	}

  2061 }

  2062 

  2063 void doDMA(u32 &s, u32 &d, u32 si, u32 di, u32 c, int transfer32)

  2064 {

  2065 	int sm = s >> 24;

  2066 	int dm = d >> 24;

  2067 

  2068 	int sc = c;

  2069 

  2070 	cpuDmaCount = c;

  2071 

  2072 	if (transfer32)

  2073 	{

  2074 		s &= 0xFFFFFFFC;

  2075 		if (s < 0x02000000 && (reg[15].I >> 24))

  2076 		{

  2077 			while (c != 0)

  2078 			{

  2079 				CPUWriteMemory(d, 0);

  2080 				d += di;

  2081 				c--;

  2082 			}

  2083 		}

  2084 		else

  2085 		{

  2086 			while (c != 0)

  2087 			{

  2088 				CPUWriteMemory(d, CPUReadMemory(s));

  2089 				d += di;

  2090 				s += si;

  2091 				c--;

  2092 			}

  2093 		}

  2094 	}

  2095 	else

  2096 	{

  2097 		s &= 0xFFFFFFFE;

  2098 		si = (int)si >> 1;

  2099 		di = (int)di >> 1;

  2100 		if (s < 0x02000000 && (reg[15].I >> 24))

  2101 		{

  2102 			while (c != 0)

  2103 			{

  2104 				CPUWriteHalfWord(d, 0);

  2105 				d += di;

  2106 				c--;

  2107 			}

  2108 		}

  2109 		else

  2110 		{

  2111 			while (c != 0)

  2112 			{

  2113 				cpuDmaLast = CPUReadHalfWord(s);

  2114 				CPUWriteHalfWord(d, cpuDmaLast);

  2115 				d += di;

  2116 				s += si;

  2117 				c--;

  2118 			}

  2119 		}

  2120 	}

  2121 

  2122 	cpuDmaCount = 0;

  2123 

  2124 	int sw = 1 + memoryWaitSeq[sm & 15];

  2125 	int dw = 1 + memoryWaitSeq[dm & 15];

  2126 

  2127 	int totalTicks = 0;

  2128 

  2129 	if (transfer32)

  2130 	{

  2131 		if (!memory32[sm & 15])

  2132 			sw <<= 1;

  2133 		if (!memory32[dm & 15])

  2134 			dw <<= 1;

  2135 	}

  2136 

  2137 	totalTicks = (sw + dw) * sc;

  2138 

  2139 	cpuDmaTicksToUpdate += totalTicks;

  2140 

  2141 	if (*extCpuLoopTicks >= 0)

  2142 	{

  2143 		CPU_BREAK_LOOP;

  2144 	}

  2145 }

  2146 

  2147 void CPUCheckDMA(int reason, int dmamask)

  2148 {

  2149 	cpuDmaHack = 0;

  2150 	// DMA 0

  2151 	if ((DM0CNT_H & 0x8000) && (dmamask & 1))

  2152 	{

  2153 		if (((DM0CNT_H >> 12) & 3) == reason)

  2154 		{

  2155 			u32 sourceIncrement = 4;

  2156 			u32 destIncrement	= 4;

  2157 			switch ((DM0CNT_H >> 7) & 3)

  2158 			{

  2159 			case 0:

  2160 				break;

  2161 			case 1:

  2162 				sourceIncrement = (u32) - 4;

  2163 				break;

  2164 			case 2:

  2165 				sourceIncrement = 0;

  2166 				break;

  2167 			}

  2168 			switch ((DM0CNT_H >> 5) & 3)

  2169 			{

  2170 			case 0:

  2171 				break;

  2172 			case 1:

  2173 				destIncrement = (u32) - 4;

  2174 				break;

  2175 			case 2:

  2176 				destIncrement = 0;

  2177 				break;

  2178 			}

  2179 #ifdef GBA_LOGGING

  2180 			if (systemVerbose & VERBOSE_DMA0)

  2181 			{

  2182 				int count = (DM0CNT_L ? DM0CNT_L : 0x4000) << 1;

  2183 				if (DM0CNT_H & 0x0400)

  2184 					count <<= 1;

  2185 				log("DMA0: s=%08x d=%08x c=%04x count=%08x\n", dma0Source, dma0Dest,

  2186 				    DM0CNT_H,

  2187 				    count);

  2188 			}

  2189 #endif

  2190 			doDMA(dma0Source, dma0Dest, sourceIncrement, destIncrement,

  2191 			      DM0CNT_L ? DM0CNT_L : 0x4000,

  2192 			      DM0CNT_H & 0x0400);

  2193 			cpuDmaHack = 1;

  2194 			if (DM0CNT_H & 0x4000)

  2195 			{

  2196 				IF |= 0x0100;

  2197 				UPDATE_REG(0x202, IF);

  2198 			}

  2199 

  2200 			if (((DM0CNT_H >> 5) & 3) == 3)

  2201 			{

  2202 				dma0Dest = DM0DAD_L | (DM0DAD_H << 16);

  2203 			}

  2204 

  2205 			if (!(DM0CNT_H & 0x0200) || (reason == 0))

  2206 			{

  2207 				DM0CNT_H &= 0x7FFF;

  2208 				UPDATE_REG(0xBA, DM0CNT_H);

  2209 			}

  2210 		}

  2211 	}

  2212 

  2213 	// DMA 1

  2214 	if ((DM1CNT_H & 0x8000) && (dmamask & 2))

  2215 	{

  2216 		if (((DM1CNT_H >> 12) & 3) == reason)

  2217 		{

  2218 			u32 sourceIncrement = 4;

  2219 			u32 destIncrement	= 4;

  2220 			switch ((DM1CNT_H >> 7) & 3)

  2221 			{

  2222 			case 0:

  2223 				break;

  2224 			case 1:

  2225 				sourceIncrement = (u32) - 4;

  2226 				break;

  2227 			case 2:

  2228 				sourceIncrement = 0;

  2229 				break;

  2230 			}

  2231 			switch ((DM1CNT_H >> 5) & 3)

  2232 			{

  2233 			case 0:

  2234 				break;

  2235 			case 1:

  2236 				destIncrement = (u32) - 4;

  2237 				break;

  2238 			case 2:

  2239 				destIncrement = 0;

  2240 				break;

  2241 			}

  2242 			if (reason == 3)

  2243 			{

  2244 #ifdef GBA_LOGGING

  2245 				if (systemVerbose & VERBOSE_DMA1)

  2246 				{

  2247 					log("DMA1: s=%08x d=%08x c=%04x count=%08x\n", dma1Source, dma1Dest,

  2248 					    DM1CNT_H,

  2249 					    16);

  2250 				}

  2251 #endif

  2252 				doDMA(dma1Source, dma1Dest, sourceIncrement, 0, 4,

  2253 				      0x0400);

  2254 			}

  2255 			else

  2256 			{

  2257 #ifdef GBA_LOGGING

  2258 				if (systemVerbose & VERBOSE_DMA1)

  2259 				{

  2260 					int count = (DM1CNT_L ? DM1CNT_L : 0x4000) << 1;

  2261 					if (DM1CNT_H & 0x0400)

  2262 						count <<= 1;

  2263 					log("DMA1: s=%08x d=%08x c=%04x count=%08x\n", dma1Source, dma1Dest,

  2264 					    DM1CNT_H,

  2265 					    count);

  2266 				}

  2267 #endif

  2268 				doDMA(dma1Source, dma1Dest, sourceIncrement, destIncrement,

  2269 				      DM1CNT_L ? DM1CNT_L : 0x4000,

  2270 				      DM1CNT_H & 0x0400);

  2271 			}

  2272 			cpuDmaHack = 1;

  2273 

  2274 			if (DM1CNT_H & 0x4000)

  2275 			{

  2276 				IF |= 0x0200;

  2277 				UPDATE_REG(0x202, IF);

  2278 			}

  2279 

  2280 			if (((DM1CNT_H >> 5) & 3) == 3)

  2281 			{

  2282 				dma1Dest = DM1DAD_L | (DM1DAD_H << 16);

  2283 			}

  2284 

  2285 			if (!(DM1CNT_H & 0x0200) || (reason == 0))

  2286 			{

  2287 				DM1CNT_H &= 0x7FFF;

  2288 				UPDATE_REG(0xC6, DM1CNT_H);

  2289 			}

  2290 		}

  2291 	}

  2292 

  2293 	// DMA 2

  2294 	if ((DM2CNT_H & 0x8000) && (dmamask & 4))

  2295 	{

  2296 		if (((DM2CNT_H >> 12) & 3) == reason)

  2297 		{

  2298 			u32 sourceIncrement = 4;

  2299 			u32 destIncrement	= 4;

  2300 			switch ((DM2CNT_H >> 7) & 3)

  2301 			{

  2302 			case 0:

  2303 				break;

  2304 			case 1:

  2305 				sourceIncrement = (u32) - 4;

  2306 				break;

  2307 			case 2:

  2308 				sourceIncrement = 0;

  2309 				break;

  2310 			}

  2311 			switch ((DM2CNT_H >> 5) & 3)

  2312 			{

  2313 			case 0:

  2314 				break;

  2315 			case 1:

  2316 				destIncrement = (u32) - 4;

  2317 				break;

  2318 			case 2:

  2319 				destIncrement = 0;

  2320 				break;

  2321 			}

  2322 			if (reason == 3)

  2323 			{

  2324 #ifdef GBA_LOGGING

  2325 				if (systemVerbose & VERBOSE_DMA2)

  2326 				{

  2327 					int count = (4) << 2;

  2328 					log("DMA2: s=%08x d=%08x c=%04x count=%08x\n", dma2Source, dma2Dest,

  2329 					    DM2CNT_H,

  2330 					    count);

  2331 				}

  2332 #endif

  2333 				doDMA(dma2Source, dma2Dest, sourceIncrement, 0, 4,

  2334 				      0x0400);

  2335 			}

  2336 			else

  2337 			{

  2338 #ifdef GBA_LOGGING

  2339 				if (systemVerbose & VERBOSE_DMA2)

  2340 				{

  2341 					int count = (DM2CNT_L ? DM2CNT_L : 0x4000) << 1;

  2342 					if (DM2CNT_H & 0x0400)

  2343 						count <<= 1;

  2344 					log("DMA2: s=%08x d=%08x c=%04x count=%08x\n", dma2Source, dma2Dest,

  2345 					    DM2CNT_H,

  2346 					    count);

  2347 				}

  2348 #endif

  2349 				doDMA(dma2Source, dma2Dest, sourceIncrement, destIncrement,

  2350 				      DM2CNT_L ? DM2CNT_L : 0x4000,

  2351 				      DM2CNT_H & 0x0400);

  2352 			}

  2353 			cpuDmaHack = 1;

  2354 			if (DM2CNT_H & 0x4000)

  2355 			{

  2356 				IF |= 0x0400;

  2357 				UPDATE_REG(0x202, IF);

  2358 			}

  2359 

  2360 			if (((DM2CNT_H >> 5) & 3) == 3)

  2361 			{

  2362 				dma2Dest = DM2DAD_L | (DM2DAD_H << 16);

  2363 			}

  2364 

  2365 			if (!(DM2CNT_H & 0x0200) || (reason == 0))

  2366 			{

  2367 				DM2CNT_H &= 0x7FFF;

  2368 				UPDATE_REG(0xD2, DM2CNT_H);

  2369 			}

  2370 		}

  2371 	}

  2372 

  2373 	// DMA 3

  2374 	if ((DM3CNT_H & 0x8000) && (dmamask & 8))

  2375 	{

  2376 		if (((DM3CNT_H >> 12) & 3) == reason)

  2377 		{

  2378 			u32 sourceIncrement = 4;

  2379 			u32 destIncrement	= 4;

  2380 			switch ((DM3CNT_H >> 7) & 3)

  2381 			{

  2382 			case 0:

  2383 				break;

  2384 			case 1:

  2385 				sourceIncrement = (u32) - 4;

  2386 				break;

  2387 			case 2:

  2388 				sourceIncrement = 0;

  2389 				break;

  2390 			}

  2391 			switch ((DM3CNT_H >> 5) & 3)

  2392 			{

  2393 			case 0:

  2394 				break;

  2395 			case 1:

  2396 				destIncrement = (u32) - 4;

  2397 				break;

  2398 			case 2:

  2399 				destIncrement = 0;

  2400 				break;

  2401 			}

  2402 #ifdef GBA_LOGGING

  2403 			if (systemVerbose & VERBOSE_DMA3)

  2404 			{

  2405 				int count = (DM3CNT_L ? DM3CNT_L : 0x10000) << 1;

  2406 				if (DM3CNT_H & 0x0400)

  2407 					count <<= 1;

  2408 				log("DMA3: s=%08x d=%08x c=%04x count=%08x\n", dma3Source, dma3Dest,

  2409 				    DM3CNT_H,

  2410 				    count);

  2411 			}

  2412 #endif

  2413 			doDMA(dma3Source, dma3Dest, sourceIncrement, destIncrement,

  2414 			      DM3CNT_L ? DM3CNT_L : 0x10000,

  2415 			      DM3CNT_H & 0x0400);

  2416 			if (DM3CNT_H & 0x4000)

  2417 			{

  2418 				IF |= 0x0800;

  2419 				UPDATE_REG(0x202, IF);

  2420 			}

  2421 

  2422 			if (((DM3CNT_H >> 5) & 3) == 3)

  2423 			{

  2424 				dma3Dest = DM3DAD_L | (DM3DAD_H << 16);

  2425 			}

  2426 

  2427 			if (!(DM3CNT_H & 0x0200) || (reason == 0))

  2428 			{

  2429 				DM3CNT_H &= 0x7FFF;

  2430 				UPDATE_REG(0xDE, DM3CNT_H);

  2431 			}

  2432 		}

  2433 	}

  2434 	cpuDmaHack = 0;

  2435 }

  2436 

  2437 void CPUUpdateRegister(u32 address, u16 value)

  2438 {

  2439 	switch (address)

  2440 	{

  2441 	case 0x00:

  2442 	{

  2443 		bool change	  = ((DISPCNT ^ value) & 0x80) ? true : false;

  2444 		bool changeBG = ((DISPCNT ^ value) & 0x0F00) ? true : false;

  2445 		DISPCNT = (value & 0xFFF7);

  2446 		UPDATE_REG(0x00, DISPCNT);

  2447 		layerEnable = layerSettings & value;

  2448 		windowOn	= (layerEnable & 0x6000) ? true : false;

  2449 		if (change && !((value & 0x80)))

  2450 		{

  2451 			if (!(DISPSTAT & 1))

  2452 			{

  2453 				lcdTicks = 960;

  2454 				//      VCOUNT = 0;

  2455 				//      UPDATE_REG(0x06, VCOUNT);

  2456 				DISPSTAT &= 0xFFFC;

  2457 				UPDATE_REG(0x04, DISPSTAT);

  2458 				CPUCompareVCOUNT();

  2459 			}

  2460 			//        (*renderLine)();

  2461 		}

  2462 		CPUUpdateRender();

  2463 		// we only care about changes in BG0-BG3

  2464 		if (changeBG)

  2465 			CPUUpdateRenderBuffers(false);

  2466 		//      CPUUpdateTicks();

  2467 		break;

  2468 	}

  2469 	case 0x04:

  2470 		DISPSTAT = (value & 0xFF38) | (DISPSTAT & 7);

  2471 		UPDATE_REG(0x04, DISPSTAT);

  2472 		break;

  2473 	case 0x06:

  2474 		// not writable

  2475 		break;

  2476 	case 0x08:

  2477 		BG0CNT = (value & 0xDFCF);

  2478 		UPDATE_REG(0x08, BG0CNT);

  2479 		break;

  2480 	case 0x0A:

  2481 		BG1CNT = (value & 0xDFCF);

  2482 		UPDATE_REG(0x0A, BG1CNT);

  2483 		break;

  2484 	case 0x0C:

  2485 		BG2CNT = (value & 0xFFCF);

  2486 		UPDATE_REG(0x0C, BG2CNT);

  2487 		break;

  2488 	case 0x0E:

  2489 		BG3CNT = (value & 0xFFCF);

  2490 		UPDATE_REG(0x0E, BG3CNT);

  2491 		break;

  2492 	case 0x10:

  2493 		BG0HOFS = value & 511;

  2494 		UPDATE_REG(0x10, BG0HOFS);

  2495 		break;

  2496 	case 0x12:

  2497 		BG0VOFS = value & 511;

  2498 		UPDATE_REG(0x12, BG0VOFS);

  2499 		break;

  2500 	case 0x14:

  2501 		BG1HOFS = value & 511;

  2502 		UPDATE_REG(0x14, BG1HOFS);

  2503 		break;

  2504 	case 0x16:

  2505 		BG1VOFS = value & 511;

  2506 		UPDATE_REG(0x16, BG1VOFS);

  2507 		break;

  2508 	case 0x18:

  2509 		BG2HOFS = value & 511;

  2510 		UPDATE_REG(0x18, BG2HOFS);

  2511 		break;

  2512 	case 0x1A:

  2513 		BG2VOFS = value & 511;

  2514 		UPDATE_REG(0x1A, BG2VOFS);

  2515 		break;

  2516 	case 0x1C:

  2517 		BG3HOFS = value & 511;

  2518 		UPDATE_REG(0x1C, BG3HOFS);

  2519 		break;

  2520 	case 0x1E:

  2521 		BG3VOFS = value & 511;

  2522 		UPDATE_REG(0x1E, BG3VOFS);

  2523 		break;

  2524 	case 0x20:

  2525 		BG2PA = value;

  2526 		UPDATE_REG(0x20, BG2PA);

  2527 		break;

  2528 	case 0x22:

  2529 		BG2PB = value;

  2530 		UPDATE_REG(0x22, BG2PB);

  2531 		break;

  2532 	case 0x24:

  2533 		BG2PC = value;

  2534 		UPDATE_REG(0x24, BG2PC);

  2535 		break;

  2536 	case 0x26:

  2537 		BG2PD = value;

  2538 		UPDATE_REG(0x26, BG2PD);

  2539 		break;

  2540 	case 0x28:

  2541 		BG2X_L = value;

  2542 		UPDATE_REG(0x28, BG2X_L);

  2543 		gfxBG2Changed |= 1;

  2544 		break;

  2545 	case 0x2A:

  2546 		BG2X_H = (value & 0xFFF);

  2547 		UPDATE_REG(0x2A, BG2X_H);

  2548 		gfxBG2Changed |= 1;

  2549 		break;

  2550 	case 0x2C:

  2551 		BG2Y_L = value;

  2552 		UPDATE_REG(0x2C, BG2Y_L);

  2553 		gfxBG2Changed |= 2;

  2554 		break;

  2555 	case 0x2E:

  2556 		BG2Y_H = value & 0xFFF;

  2557 		UPDATE_REG(0x2E, BG2Y_H);

  2558 		gfxBG2Changed |= 2;

  2559 		break;

  2560 	case 0x30:

  2561 		BG3PA = value;

  2562 		UPDATE_REG(0x30, BG3PA);

  2563 		break;

  2564 	case 0x32:

  2565 		BG3PB = value;

  2566 		UPDATE_REG(0x32, BG3PB);

  2567 		break;

  2568 	case 0x34:

  2569 		BG3PC = value;

  2570 		UPDATE_REG(0x34, BG3PC);

  2571 		break;

  2572 	case 0x36:

  2573 		BG3PD = value;

  2574 		UPDATE_REG(0x36, BG3PD);

  2575 		break;

  2576 	case 0x38:

  2577 		BG3X_L = value;

  2578 		UPDATE_REG(0x38, BG3X_L);

  2579 		gfxBG3Changed |= 1;

  2580 		break;

  2581 	case 0x3A:

  2582 		BG3X_H = value & 0xFFF;

  2583 		UPDATE_REG(0x3A, BG3X_H);

  2584 		gfxBG3Changed |= 1;

  2585 		break;

  2586 	case 0x3C:

  2587 		BG3Y_L = value;

  2588 		UPDATE_REG(0x3C, BG3Y_L);

  2589 		gfxBG3Changed |= 2;

  2590 		break;

  2591 	case 0x3E:

  2592 		BG3Y_H = value & 0xFFF;

  2593 		UPDATE_REG(0x3E, BG3Y_H);

  2594 		gfxBG3Changed |= 2;

  2595 		break;

  2596 	case 0x40:

  2597 		WIN0H = value;

  2598 		UPDATE_REG(0x40, WIN0H);

  2599 		CPUUpdateWindow0();

  2600 		break;

  2601 	case 0x42:

  2602 		WIN1H = value;

  2603 		UPDATE_REG(0x42, WIN1H);

  2604 		CPUUpdateWindow1();

  2605 		break;

  2606 	case 0x44:

  2607 		WIN0V = value;

  2608 		UPDATE_REG(0x44, WIN0V);

  2609 		break;

  2610 	case 0x46:

  2611 		WIN1V = value;

  2612 		UPDATE_REG(0x46, WIN1V);

  2613 		break;

  2614 	case 0x48:

  2615 		WININ = value & 0x3F3F;

  2616 		UPDATE_REG(0x48, WININ);

  2617 		break;

  2618 	case 0x4A:

  2619 		WINOUT = value & 0x3F3F;

  2620 		UPDATE_REG(0x4A, WINOUT);

  2621 		break;

  2622 	case 0x4C:

  2623 		MOSAIC = value;

  2624 		UPDATE_REG(0x4C, MOSAIC);

  2625 		break;

  2626 	case 0x50:

  2627 		BLDMOD = value & 0x3FFF;

  2628 		UPDATE_REG(0x50, BLDMOD);

  2629 		fxOn = ((BLDMOD >> 6) & 3) != 0;

  2630 		CPUUpdateRender();

  2631 		break;

  2632 	case 0x52:

  2633 		COLEV = value & 0x1F1F;

  2634 		UPDATE_REG(0x52, COLEV);

  2635 		break;

  2636 	case 0x54:

  2637 		COLY = value & 0x1F;

  2638 		UPDATE_REG(0x54, COLY);

  2639 		break;

  2640 	case 0x60:

  2641 	case 0x62:

  2642 	case 0x64:

  2643 	case 0x68:

  2644 	case 0x6c:

  2645 	case 0x70:

  2646 	case 0x72:

  2647 	case 0x74:

  2648 	case 0x78:

  2649 	case 0x7c:

  2650 	case 0x80:

  2651 	case 0x84:

  2652 		soundEvent(address & 0xFF, (u8)(value & 0xFF));

  2653 		soundEvent((address & 0xFF) + 1, (u8)(value >> 8));

  2654 		break;

  2655 	case 0x82:

  2656 	case 0x88:

  2657 	case 0xa0:

  2658 	case 0xa2:

  2659 	case 0xa4:

  2660 	case 0xa6:

  2661 	case 0x90:

  2662 	case 0x92:

  2663 	case 0x94:

  2664 	case 0x96:

  2665 	case 0x98:

  2666 	case 0x9a:

  2667 	case 0x9c:

  2668 	case 0x9e:

  2669 		soundEvent(address & 0xFF, value);

  2670 		break;

  2671 	case 0xB0:

  2672 		DM0SAD_L = value;

  2673 		UPDATE_REG(0xB0, DM0SAD_L);

  2674 		break;

  2675 	case 0xB2:

  2676 		DM0SAD_H = value & 0x07FF;

  2677 		UPDATE_REG(0xB2, DM0SAD_H);

  2678 		break;

  2679 	case 0xB4:

  2680 		DM0DAD_L = value;

  2681 		UPDATE_REG(0xB4, DM0DAD_L);

  2682 		break;

  2683 	case 0xB6:

  2684 		DM0DAD_H = value & 0x07FF;

  2685 		UPDATE_REG(0xB6, DM0DAD_H);

  2686 		break;

  2687 	case 0xB8:

  2688 		DM0CNT_L = value & 0x3FFF;

  2689 		UPDATE_REG(0xB8, 0);

  2690 		break;

  2691 	case 0xBA:

  2692 	{

  2693 		bool start = ((DM0CNT_H ^ value) & 0x8000) ? true : false;

  2694 		value &= 0xF7E0;

  2695 

  2696 		DM0CNT_H = value;

  2697 		UPDATE_REG(0xBA, DM0CNT_H);

  2698 

  2699 		if (start && (value & 0x8000))

  2700 		{

  2701 			dma0Source = DM0SAD_L | (DM0SAD_H << 16);

  2702 			dma0Dest   = DM0DAD_L | (DM0DAD_H << 16);

  2703 			CPUCheckDMA(0, 1);

  2704 		}

  2705 		break;

  2706 	}

  2707 	case 0xBC:

  2708 		DM1SAD_L = value;

  2709 		UPDATE_REG(0xBC, DM1SAD_L);

  2710 		break;

  2711 	case 0xBE:

  2712 		DM1SAD_H = value & 0x0FFF;

  2713 		UPDATE_REG(0xBE, DM1SAD_H);

  2714 		break;

  2715 	case 0xC0:

  2716 		DM1DAD_L = value;

  2717 		UPDATE_REG(0xC0, DM1DAD_L);

  2718 		break;

  2719 	case 0xC2:

  2720 		DM1DAD_H = value & 0x07FF;

  2721 		UPDATE_REG(0xC2, DM1DAD_H);

  2722 		break;

  2723 	case 0xC4:

  2724 		DM1CNT_L = value & 0x3FFF;

  2725 		UPDATE_REG(0xC4, 0);

  2726 		break;

  2727 	case 0xC6:

  2728 	{

  2729 		bool start = ((DM1CNT_H ^ value) & 0x8000) ? true : false;

  2730 		value &= 0xF7E0;

  2731 

  2732 		DM1CNT_H = value;

  2733 		UPDATE_REG(0xC6, DM1CNT_H);

  2734 

  2735 		if (start && (value & 0x8000))

  2736 		{

  2737 			dma1Source = DM1SAD_L | (DM1SAD_H << 16);

  2738 			dma1Dest   = DM1DAD_L | (DM1DAD_H << 16);

  2739 			CPUCheckDMA(0, 2);

  2740 		}

  2741 		break;

  2742 	}

  2743 	case 0xC8:

  2744 		DM2SAD_L = value;

  2745 		UPDATE_REG(0xC8, DM2SAD_L);

  2746 		break;

  2747 	case 0xCA:

  2748 		DM2SAD_H = value & 0x0FFF;

  2749 		UPDATE_REG(0xCA, DM2SAD_H);

  2750 		break;

  2751 	case 0xCC:

  2752 		DM2DAD_L = value;

  2753 		UPDATE_REG(0xCC, DM2DAD_L);

  2754 		break;

  2755 	case 0xCE:

  2756 		DM2DAD_H = value & 0x07FF;

  2757 		UPDATE_REG(0xCE, DM2DAD_H);

  2758 		break;

  2759 	case 0xD0:

  2760 		DM2CNT_L = value & 0x3FFF;

  2761 		UPDATE_REG(0xD0, 0);

  2762 		break;

  2763 	case 0xD2:

  2764 	{

  2765 		bool start = ((DM2CNT_H ^ value) & 0x8000) ? true : false;

  2766 

  2767 		value &= 0xF7E0;

  2768 

  2769 		DM2CNT_H = value;

  2770 		UPDATE_REG(0xD2, DM2CNT_H);

  2771 

  2772 		if (start && (value & 0x8000))

  2773 		{

  2774 			dma2Source = DM2SAD_L | (DM2SAD_H << 16);

  2775 			dma2Dest   = DM2DAD_L | (DM2DAD_H << 16);

  2776 

  2777 			CPUCheckDMA(0, 4);

  2778 		}

  2779 		break;

  2780 	}

  2781 	case 0xD4:

  2782 		DM3SAD_L = value;

  2783 		UPDATE_REG(0xD4, DM3SAD_L);

  2784 		break;

  2785 	case 0xD6:

  2786 		DM3SAD_H = value & 0x0FFF;

  2787 		UPDATE_REG(0xD6, DM3SAD_H);

  2788 		break;

  2789 	case 0xD8:

  2790 		DM3DAD_L = value;

  2791 		UPDATE_REG(0xD8, DM3DAD_L);

  2792 		break;

  2793 	case 0xDA:

  2794 		DM3DAD_H = value & 0x0FFF;

  2795 		UPDATE_REG(0xDA, DM3DAD_H);

  2796 		break;

  2797 	case 0xDC:

  2798 		DM3CNT_L = value;

  2799 		UPDATE_REG(0xDC, 0);

  2800 		break;

  2801 	case 0xDE:

  2802 	{

  2803 		bool start = ((DM3CNT_H ^ value) & 0x8000) ? true : false;

  2804 

  2805 		value &= 0xFFE0;

  2806 

  2807 		DM3CNT_H = value;

  2808 		UPDATE_REG(0xDE, DM3CNT_H);

  2809 

  2810 		if (start && (value & 0x8000))

  2811 		{

  2812 			dma3Source = DM3SAD_L | (DM3SAD_H << 16);

  2813 			dma3Dest   = DM3DAD_L | (DM3DAD_H << 16);

  2814 			CPUCheckDMA(0, 8);

  2815 		}

  2816 		break;

  2817 	}

  2818 	case 0x100:

  2819 		timer0Reload = value;

  2820 		break;

  2821 	case 0x102:

  2822 		timer0Ticks = timer0ClockReload = TIMER_TICKS[value & 3];

  2823 		if (!timer0On && (value & 0x80))

  2824 		{

  2825 			// reload the counter

  2826 			TM0D = timer0Reload;

  2827 			if (timer0ClockReload == 1)

  2828 				timer0Ticks = 0x10000 - TM0D;

  2829 			UPDATE_REG(0x100, TM0D);

  2830 		}

  2831 		timer0On = value & 0x80 ? true : false;

  2832 		TM0CNT	 = value & 0xC7;

  2833 		UPDATE_REG(0x102, TM0CNT);

  2834 		//    CPUUpdateTicks();

  2835 		break;

  2836 	case 0x104:

  2837 		timer1Reload = value;

  2838 		break;

  2839 	case 0x106:

  2840 		timer1Ticks = timer1ClockReload = TIMER_TICKS[value & 3];

  2841 		if (!timer1On && (value & 0x80))

  2842 		{

  2843 			// reload the counter

  2844 			TM1D = timer1Reload;

  2845 			if (timer1ClockReload == 1)

  2846 				timer1Ticks = 0x10000 - TM1D;

  2847 			UPDATE_REG(0x104, TM1D);

  2848 		}

  2849 		timer1On = value & 0x80 ? true : false;

  2850 		TM1CNT	 = value & 0xC7;

  2851 		UPDATE_REG(0x106, TM1CNT);

  2852 		break;

  2853 	case 0x108:

  2854 		timer2Reload = value;

  2855 		break;

  2856 	case 0x10A:

  2857 		timer2Ticks = timer2ClockReload = TIMER_TICKS[value & 3];

  2858 		if (!timer2On && (value & 0x80))

  2859 		{

  2860 			// reload the counter

  2861 			TM2D = timer2Reload;

  2862 			if (timer2ClockReload == 1)

  2863 				timer2Ticks = 0x10000 - TM2D;

  2864 			UPDATE_REG(0x108, TM2D);

  2865 		}

  2866 		timer2On = value & 0x80 ? true : false;

  2867 		TM2CNT	 = value & 0xC7;

  2868 		UPDATE_REG(0x10A, TM2CNT);

  2869 		break;

  2870 	case 0x10C:

  2871 		timer3Reload = value;

  2872 		break;

  2873 	case 0x10E:

  2874 		timer3Ticks = timer3ClockReload = TIMER_TICKS[value & 3];

  2875 		if (!timer3On && (value & 0x80))

  2876 		{

  2877 			// reload the counter

  2878 			TM3D = timer3Reload;

  2879 			if (timer3ClockReload == 1)

  2880 				timer3Ticks = 0x10000 - TM3D;

  2881 			UPDATE_REG(0x10C, TM3D);

  2882 		}

  2883 		timer3On = value & 0x80 ? true : false;

  2884 		TM3CNT	 = value & 0xC7;

  2885 		UPDATE_REG(0x10E, TM3CNT);

  2886 		break;

  2887 	case 0x128:

  2888 		if (value & 0x80)

  2889 		{

  2890 			value &= 0xff7f;

  2891 			if (value & 1 && (value & 0x4000))

  2892 			{

  2893 				UPDATE_REG(0x12a, 0xFF);

  2894 				IF |= 0x80;

  2895 				UPDATE_REG(0x202, IF);

  2896 				value &= 0x7f7f;

  2897 			}

  2898 		}

  2899 		UPDATE_REG(0x128, value);

  2900 		break;

  2901 	case 0x130:

  2902 		P1 |= (value & 0x3FF);

  2903 		UPDATE_REG(0x130, P1);

  2904 		break;

  2905 	case 0x132:

  2906 		UPDATE_REG(0x132, value & 0xC3FF);

  2907 		break;

  2908 	case 0x200:

  2909 		IE = value & 0x3FFF;

  2910 		UPDATE_REG(0x200, IE);

  2911 		if ((IME & 1) && (IF & IE) && armIrqEnable)

  2912 		{

  2913 			CPU_BREAK_LOOP_2;

  2914 		}

  2915 		break;

  2916 	case 0x202:

  2917 		IF ^= (value & IF);

  2918 		UPDATE_REG(0x202, IF);

  2919 		break;

  2920 	case 0x204:

  2921 	{

  2922 		int i;

  2923 		memoryWait[0x0e] = memoryWaitSeq[0x0e] = gamepakRamWaitState[value & 3];

  2924 

  2925 		if (!speedHack)

  2926 		{

  2927 			memoryWait[0x08]	= memoryWait[0x09] = gamepakWaitState[(value >> 2) & 7];

  2928 			memoryWaitSeq[0x08] = memoryWaitSeq[0x09] =

  2929 			                          gamepakWaitState0[(value >> 2) & 7];

  2930 

  2931 			memoryWait[0x0a]	= memoryWait[0x0b] = gamepakWaitState[(value >> 5) & 7];

  2932 			memoryWaitSeq[0x0a] = memoryWaitSeq[0x0b] =

  2933 			                          gamepakWaitState1[(value >> 5) & 7];

  2934 

  2935 			memoryWait[0x0c]	= memoryWait[0x0d] = gamepakWaitState[(value >> 8) & 7];

  2936 			memoryWaitSeq[0x0c] = memoryWaitSeq[0x0d] =

  2937 			                          gamepakWaitState2[(value >> 8) & 7];

  2938 		}

  2939 		else

  2940 		{

  2941 			memoryWait[0x08]	= memoryWait[0x09] = 4;

  2942 			memoryWaitSeq[0x08] = memoryWaitSeq[0x09] = 2;

  2943 

  2944 			memoryWait[0x0a]	= memoryWait[0x0b] = 4;

  2945 			memoryWaitSeq[0x0a] = memoryWaitSeq[0x0b] = 4;

  2946 

  2947 			memoryWait[0x0c]	= memoryWait[0x0d] = 4;

  2948 			memoryWaitSeq[0x0c] = memoryWaitSeq[0x0d] = 8;

  2949 		}

  2950 		for (i = 0; i < 16; i++)

  2951 		{

  2952 			memoryWaitFetch32[i] = memoryWait32[i] = memoryWait[i] *

  2953 			                                         (memory32[i] ? 1 : 2);

  2954 			memoryWaitFetch[i] = memoryWait[i];

  2955 		}

  2956 		memoryWaitFetch32[3] += 1;

  2957 		memoryWaitFetch32[2] += 3;

  2958 

  2959 		prefetchActive	= false;

  2960 		prefetchApplies = false;

  2961 		if (value & 0x4000)

  2962 		{

  2963 			for (i = 8; i < 16; i++)

  2964 			{

  2965 				memoryWaitFetch32[i] = 2 * cpuMemoryWait[i];

  2966 				memoryWaitFetch[i]	 = cpuMemoryWait[i];

  2967 			}

  2968 			if (((value & 3) == 3))

  2969 			{

  2970 				if (!memLagTempEnabled)

  2971 				{

  2972 					memoryWaitFetch[8]--; // hack to prevent inaccurately extreme lag at some points of many games (possibly

  2973 					                      // from no pre-fetch emulation)

  2974 					                      /// FIXME: how correct is this? Should it set the fetch to 0 or change fetch32 or

  2975 					                      // anything else?

  2976 

  2977 					prefetchActive = true;

  2978 				}

  2979 				prefetchApplies = true;

  2980 			}

  2981 		}

  2982 		//if(prefetchActive && !prefetchPrevActive) systemScreenMessage("pre-fetch enabled",3,600);

  2983 		//if(!prefetchActive && prefetchPrevActive) systemScreenMessage("pre-fetch disabled",3,600);

  2984 		prefetchPrevActive = prefetchActive;

  2985 

  2986 		UPDATE_REG(0x204, value);

  2987 		break;

  2988 	}

  2989 	case 0x208:

  2990 		IME = value & 1;

  2991 		UPDATE_REG(0x208, IME);

  2992 		if ((IME & 1) && (IF & IE) && armIrqEnable)

  2993 		{

  2994 			CPU_BREAK_LOOP_2;

  2995 		}

  2996 		break;

  2997 	case 0x300:

  2998 		if (value != 0)

  2999 			value &= 0xFFFE;

  3000 		UPDATE_REG(0x300, value);

  3001 		break;

  3002 	default:

  3003 		UPDATE_REG(address & 0x3FE, value);

  3004 		break;

  3005 	}

  3006 }

  3007 

  3008 void CPUWriteHalfWordWrapped(u32 address, u16 value)

  3009 {

  3010 #ifdef GBA_LOGGING

  3011 	if (address & 1)

  3012 	{

  3013 		if (systemVerbose & VERBOSE_UNALIGNED_MEMORY)

  3014 		{

  3015 			log("Unaligned halfword write: %04x to %08x from %08x\n",

  3016 			    value,

  3017 			    address,

  3018 			    armMode ? armNextPC - 4 : armNextPC - 2);

  3019 		}

  3020 	}

  3021 #endif

  3022 

  3023 	switch (address >> 24)

  3024 	{

  3025 	case 2:

  3026 #ifdef SDL

  3027 		if (*((u16 *)&freezeWorkRAM[address & 0x3FFFE]))

  3028 			cheatsWriteHalfWord((u16 *)&workRAM[address & 0x3FFFE],

  3029 			                    value,

  3030 			                    *((u16 *)&freezeWorkRAM[address & 0x3FFFE]));

  3031 		else

  3032 #endif

  3033 		WRITE16LE(((u16 *)&workRAM[address & 0x3FFFE]), value);

  3034 		break;

  3035 	case 3:

  3036 #ifdef SDL

  3037 		if (*((u16 *)&freezeInternalRAM[address & 0x7ffe]))

  3038 			cheatsWriteHalfWord((u16 *)&internalRAM[address & 0x7ffe],

  3039 			                    value,

  3040 			                    *((u16 *)&freezeInternalRAM[address & 0x7ffe]));

  3041 		else

  3042 #endif

  3043 		WRITE16LE(((u16 *)&internalRAM[address & 0x7ffe]), value);

  3044 		break;

  3045 	case 4:

  3046 		CPUUpdateRegister(address & 0x3fe, value);

  3047 		break;

  3048 	case 5:

  3049 		WRITE16LE(((u16 *)&paletteRAM[address & 0x3fe]), value);

  3050 		break;

  3051 	case 6:

  3052 		if (address & 0x10000)

  3053 			WRITE16LE(((u16 *)&vram[address & 0x17ffe]), value);

  3054 		else

  3055 			WRITE16LE(((u16 *)&vram[address & 0x1fffe]), value);

  3056 		break;

  3057 	case 7:

  3058 		WRITE16LE(((u16 *)&oam[address & 0x3fe]), value);

  3059 		break;

  3060 	case 8:

  3061 	case 9:

  3062 		if (address == 0x80000c4 || address == 0x80000c6 || address == 0x80000c8)

  3063 		{

  3064 			if (!rtcWrite(address, value))

  3065 				goto unwritable;

  3066 		}

  3067 		else if (!agbPrintWrite(address, value))

  3068 			goto unwritable;

  3069 		break;

  3070 	case 13:

  3071 		if (cpuEEPROMEnabled)

  3072 		{

  3073 			eepromWrite(address, (u8)(value & 0xFF));

  3074 			break;

  3075 		}

  3076 		goto unwritable;

  3077 	case 14:

  3078 		if (!eepromInUse | cpuSramEnabled | cpuFlashEnabled)

  3079 		{

  3080 			(*cpuSaveGameFunc)(address, (u8)(value & 0xFF));

  3081 			break;

  3082 		}

  3083 		goto unwritable;

  3084 	default:

  3085 unwritable:

  3086 #ifdef GBA_LOGGING

  3087 		if (systemVerbose & VERBOSE_ILLEGAL_WRITE)

  3088 		{

  3089 			log("Illegal halfword write: %04x to %08x from %08x\n",

  3090 			    value,

  3091 			    address,

  3092 			    armMode ? armNextPC - 4 : armNextPC - 2);

  3093 		}

  3094 #endif

  3095 		break;

  3096 	}

  3097 }

  3098 

  3099 void CPUWriteHalfWord(u32 address, u16 value)

  3100 {

  3101 	CPUWriteHalfWordWrapped(address, value);

  3102 	CallRegisteredLuaMemHook(address, 2, value, LUAMEMHOOK_WRITE);

  3103 }

  3104 

  3105 void CPUWriteByteWrapped(u32 address, u8 b)

  3106 {

  3107 	switch (address >> 24)

  3108 	{

  3109 	case 2:

  3110 #ifdef SDL

  3111 		if (freezeWorkRAM[address & 0x3FFFF])

  3112 			cheatsWriteByte(&workRAM[address & 0x3FFFF], b);

  3113 		else

  3114 #endif

  3115 		workRAM[address & 0x3FFFF] = b;

  3116 		break;

  3117 	case 3:

  3118 #ifdef SDL

  3119 		if (freezeInternalRAM[address & 0x7fff])

  3120 			cheatsWriteByte(&internalRAM[address & 0x7fff], b);

  3121 		else

  3122 #endif

  3123 		internalRAM[address & 0x7fff] = b;

  3124 		break;

  3125 	case 4:

  3126 		switch (address & 0x3FF)

  3127 		{

  3128 		case 0x301:

  3129 			if (b == 0x80)

  3130 				stopState = true;

  3131 			holdState = 1;

  3132 			holdType  = -1;

  3133 			break;

  3134 		case 0x60:

  3135 		case 0x61:

  3136 		case 0x62:

  3137 		case 0x63:

  3138 		case 0x64:

  3139 		case 0x65:

  3140 		case 0x68:

  3141 		case 0x69:

  3142 		case 0x6c:

  3143 		case 0x6d:

  3144 		case 0x70:

  3145 		case 0x71:

  3146 		case 0x72:

  3147 		case 0x73:

  3148 		case 0x74:

  3149 		case 0x75:

  3150 		case 0x78:

  3151 		case 0x79:

  3152 		case 0x7c:

  3153 		case 0x7d:

  3154 		case 0x80:

  3155 		case 0x81:

  3156 		case 0x84:

  3157 		case 0x85:

  3158 		case 0x90:

  3159 		case 0x91:

  3160 		case 0x92:

  3161 		case 0x93:

  3162 		case 0x94:

  3163 		case 0x95:

  3164 		case 0x96:

  3165 		case 0x97:

  3166 		case 0x98:

  3167 		case 0x99:

  3168 		case 0x9a:

  3169 		case 0x9b:

  3170 		case 0x9c:

  3171 		case 0x9d:

  3172 		case 0x9e:

  3173 		case 0x9f:

  3174 			soundEvent(address & 0xFF, b);

  3175 			break;

  3176 		default:

  3177 			//      if(address & 1) {

  3178 			//        CPUWriteHalfWord(address-1, (CPUReadHalfWord(address-1)&0x00FF)|((int)b<<8));

  3179 			//      } else

  3180 			if (address & 1)

  3181 				CPUUpdateRegister(address & 0x3fe,

  3182 				                  ((READ16LE(((u16 *)&ioMem[address & 0x3fe])))

  3183 				                   & 0x00FF) |

  3184 				                  b << 8);

  3185 			else

  3186 				CPUUpdateRegister(address & 0x3fe,

  3187 				                  ((READ16LE(((u16 *)&ioMem[address & 0x3fe])) & 0xFF00) | b));

  3188 		}

  3189 		break;

  3190 	case 5:

  3191 		// no need to switch

  3192 		*((u16 *)&paletteRAM[address & 0x3FE]) = (b << 8) | b;

  3193 		break;

  3194 	case 6:

  3195 		// no need to switch

  3196 		if (address & 0x10000)

  3197 			*((u16 *)&vram[address & 0x17FFE]) = (b << 8) | b;

  3198 		else

  3199 			*((u16 *)&vram[address & 0x1FFFE]) = (b << 8) | b;

  3200 		break;

  3201 	case 7:

  3202 		// no need to switch

  3203 		*((u16 *)&oam[address & 0x3FE]) = (b << 8) | b;

  3204 		break;

  3205 	case 13:

  3206 		if (cpuEEPROMEnabled)

  3207 		{

  3208 			eepromWrite(address, b);

  3209 			break;

  3210 		}

  3211 		goto unwritable;

  3212 	case 14:

  3213 		if (!eepromInUse | cpuSramEnabled | cpuFlashEnabled)

  3214 		{

  3215 			(*cpuSaveGameFunc)(address, b);

  3216 			break;

  3217 		}

  3218 	// default

  3219 	default:

  3220 unwritable:

  3221 #ifdef GBA_LOGGING

  3222 		if (systemVerbose & VERBOSE_ILLEGAL_WRITE)

  3223 		{

  3224 			log("Illegal byte write: %02x to %08x from %08x\n",

  3225 			    b,

  3226 			    address,

  3227 			    armMode ? armNextPC - 4 : armNextPC - 2);

  3228 		}

  3229 #endif

  3230 		break;

  3231 	}

  3232 }

  3233 

  3234 void CPUWriteByte(u32 address, u8 b)

  3235 {

  3236 	CPUWriteByteWrapped(address, b);

  3237 	CallRegisteredLuaMemHook(address, 1, b, LUAMEMHOOK_WRITE);

  3238 }

  3239 

  3240 bool CPULoadBios(const char *biosFileName, bool useBiosFile)

  3241 {

  3242 	useBios = false;

  3243 	if (useBiosFile)

  3244 	{

  3245 		useBios = utilLoadBIOS(bios, biosFileName, 4);

  3246 		if (!useBios)

  3247 		{

  3248 			systemMessage(MSG_INVALID_BIOS_FILE_SIZE, N_("Invalid GBA BIOS file"));

  3249 		}

  3250 	}

  3251 

  3252 	if (!useBios)

  3253 	{

  3254 		// load internal BIOS

  3255 		memcpy(bios, myROM, sizeof(myROM));

  3256 	}

  3257 

  3258 	return useBios;

  3259 }

  3260 

  3261 void CPUInit()

  3262 {

  3263 #ifdef WORDS_BIGENDIAN

  3264 	if (!cpuBiosSwapped)

  3265 	{

  3266 		for (unsigned int i = 0; i < sizeof(myROM) / 4; i++)

  3267 		{

  3268 			WRITE32LE(&myROM[i], myROM[i]);

  3269 		}

  3270 		cpuBiosSwapped = true;

  3271 	}

  3272 #endif

  3273 	gbaSaveType = 0;

  3274 	eepromInUse = 0;

  3275 	saveType	= 0;

  3276 

  3277 	if (!useBios)

  3278 	{

  3279 		// load internal BIOS

  3280 		memcpy(bios, myROM, sizeof(myROM));

  3281 	}

  3282 

  3283 	biosProtected[0] = 0x00;

  3284 	biosProtected[1] = 0xf0;

  3285 	biosProtected[2] = 0x29;

  3286 	biosProtected[3] = 0xe1;

  3287 

  3288 	int i = 0;

  3289 	for (i = 0; i < 256; i++)

  3290 	{

  3291 		int cpuBitSetCount = 0;

  3292 		int j;

  3293 		for (j = 0; j < 8; j++)

  3294 			if (i & (1 << j))

  3295 				cpuBitSetCount++;

  3296 		cpuBitsSet[i] = cpuBitSetCount;

  3297 

  3298 		for (j = 0; j < 8; j++)

  3299 			if (i & (1 << j))

  3300 				break;

  3301 		cpuLowestBitSet[i] = j;

  3302 	}

  3303 

  3304 	for (i = 0; i < 0x400; i++)

  3305 		ioReadable[i] = true;

  3306 	for (i = 0x10; i < 0x48; i++)

  3307 		ioReadable[i] = false;

  3308 	for (i = 0x4c; i < 0x50; i++)

  3309 		ioReadable[i] = false;

  3310 	for (i = 0x54; i < 0x60; i++)

  3311 		ioReadable[i] = false;

  3312 	for (i = 0x8c; i < 0x90; i++)

  3313 		ioReadable[i] = false;

  3314 	for (i = 0xa0; i < 0xb8; i++)

  3315 		ioReadable[i] = false;

  3316 	for (i = 0xbc; i < 0xc4; i++)

  3317 		ioReadable[i] = false;

  3318 	for (i = 0xc8; i < 0xd0; i++)

  3319 		ioReadable[i] = false;

  3320 	for (i = 0xd4; i < 0xdc; i++)

  3321 		ioReadable[i] = false;

  3322 	for (i = 0xe0; i < 0x100; i++)

  3323 		ioReadable[i] = false;

  3324 	for (i = 0x110; i < 0x120; i++)

  3325 		ioReadable[i] = false;

  3326 	for (i = 0x12c; i < 0x130; i++)

  3327 		ioReadable[i] = false;

  3328 	for (i = 0x138; i < 0x140; i++)

  3329 		ioReadable[i] = false;

  3330 	for (i = 0x144; i < 0x150; i++)

  3331 		ioReadable[i] = false;

  3332 	for (i = 0x15c; i < 0x200; i++)

  3333 		ioReadable[i] = false;

  3334 	for (i = 0x20c; i < 0x300; i++)

  3335 		ioReadable[i] = false;

  3336 	for (i = 0x304; i < 0x400; i++)

  3337 		ioReadable[i] = false;

  3338 

  3339 	*((u16 *)&rom[0x1fe209c]) = 0xdffa;  // SWI 0xFA

  3340 	*((u16 *)&rom[0x1fe209e]) = 0x4770;  // BX LR

  3341 

  3342 	{

  3343 		int32 origMemoryWaitFetch[16]	= { 3, 0, 3, 0, 0, 1, 1, 0, 4, 4, 4, 4, 4, 4, 4, 0 };

  3344 		int32 origMemoryWaitFetch32[16] = { 6, 0, 6, 0, 0, 2, 2, 0, 8, 8, 8, 8, 8, 8, 8, 0 };

  3345 		memcpy(memoryWaitFetch, origMemoryWaitFetch, 16 * sizeof(int32));

  3346 		memcpy(memoryWaitFetch32, origMemoryWaitFetch32, 16 * sizeof(int32));

  3347 	}

  3348 }

  3349 

  3350 void CPUReset(bool userReset)

  3351 {

  3352 	// movie must be closed while opening/creating a movie

  3353 	if (userReset && VBAMovieRecording())

  3354 	{

  3355 		VBAMovieSignalReset();

  3356 		return;

  3357 	}

  3358 

  3359 	if (!VBAMovieActive())

  3360 	{

  3361 		GBASystemCounters.frameCount = 0;

  3362 		GBASystemCounters.lagCount	 = 0;

  3363 		GBASystemCounters.extraCount = 0;

  3364 		GBASystemCounters.lagged	 = true;

  3365 		GBASystemCounters.laggedLast = true;

  3366 	}

  3367 

  3368 	if (gbaSaveType == 0)

  3369 	{

  3370 		if (eepromInUse)

  3371 			gbaSaveType = 3;

  3372 		else

  3373 			switch (saveType)

  3374 			{

  3375 			case 1:

  3376 				gbaSaveType = 1;

  3377 				break;

  3378 			case 2:

  3379 				gbaSaveType = 2;

  3380 				break;

  3381 			}

  3382 	}

  3383 

  3384 	rtcReset();

  3385 	// clean registers

  3386 	memset(&reg[0], 0, sizeof(reg));

  3387 	// clean OAM

  3388 	memset(oam, 0, 0x400);

  3389 	// clean palette

  3390 	memset(paletteRAM, 0, 0x400);

  3391 	// clean picture

  3392 	memset(pix, 0, 4 * 241 * 162);

  3393 	// clean vram

  3394 	memset(vram, 0, 0x20000);

  3395 	// clean io memory

  3396 	memset(ioMem, 0, 0x400);

  3397 	// clean RAM

  3398 	memset(internalRAM, 0, 0x8000); /// FIXME: is it unsafe to erase ALL of this? Even the init code doesn't.

  3399 	memset(workRAM, 0, 0x40000); /// ditto

  3400 

  3401 	DISPCNT	 = 0x0080;

  3402 	DISPSTAT = 0x0000;

  3403 	VCOUNT	 = 0x0000;

  3404 	BG0CNT	 = 0x0000;

  3405 	BG1CNT	 = 0x0000;

  3406 	BG2CNT	 = 0x0000;

  3407 	BG3CNT	 = 0x0000;

  3408 	BG0HOFS	 = 0x0000;

  3409 	BG0VOFS	 = 0x0000;

  3410 	BG1HOFS	 = 0x0000;

  3411 	BG1VOFS	 = 0x0000;

  3412 	BG2HOFS	 = 0x0000;

  3413 	BG2VOFS	 = 0x0000;

  3414 	BG3HOFS	 = 0x0000;

  3415 	BG3VOFS	 = 0x0000;

  3416 	BG2PA	 = 0x0100;

  3417 	BG2PB	 = 0x0000;

  3418 	BG2PC	 = 0x0000;

  3419 	BG2PD	 = 0x0100;

  3420 	BG2X_L	 = 0x0000;

  3421 	BG2X_H	 = 0x0000;

  3422 	BG2Y_L	 = 0x0000;

  3423 	BG2Y_H	 = 0x0000;

  3424 	BG3PA	 = 0x0100;

  3425 	BG3PB	 = 0x0000;

  3426 	BG3PC	 = 0x0000;

  3427 	BG3PD	 = 0x0100;

  3428 	BG3X_L	 = 0x0000;

  3429 	BG3X_H	 = 0x0000;

  3430 	BG3Y_L	 = 0x0000;

  3431 	BG3Y_H	 = 0x0000;

  3432 	WIN0H	 = 0x0000;

  3433 	WIN1H	 = 0x0000;

  3434 	WIN0V	 = 0x0000;

  3435 	WIN1V	 = 0x0000;

  3436 	WININ	 = 0x0000;

  3437 	WINOUT	 = 0x0000;

  3438 	MOSAIC	 = 0x0000;

  3439 	BLDMOD	 = 0x0000;

  3440 	COLEV	 = 0x0000;

  3441 	COLY	 = 0x0000;

  3442 	DM0SAD_L = 0x0000;

  3443 	DM0SAD_H = 0x0000;

  3444 	DM0DAD_L = 0x0000;

  3445 	DM0DAD_H = 0x0000;

  3446 	DM0CNT_L = 0x0000;

  3447 	DM0CNT_H = 0x0000;

  3448 	DM1SAD_L = 0x0000;

  3449 	DM1SAD_H = 0x0000;

  3450 	DM1DAD_L = 0x0000;

  3451 	DM1DAD_H = 0x0000;

  3452 	DM1CNT_L = 0x0000;

  3453 	DM1CNT_H = 0x0000;

  3454 	DM2SAD_L = 0x0000;

  3455 	DM2SAD_H = 0x0000;

  3456 	DM2DAD_L = 0x0000;

  3457 	DM2DAD_H = 0x0000;

  3458 	DM2CNT_L = 0x0000;

  3459 	DM2CNT_H = 0x0000;

  3460 	DM3SAD_L = 0x0000;

  3461 	DM3SAD_H = 0x0000;

  3462 	DM3DAD_L = 0x0000;

  3463 	DM3DAD_H = 0x0000;

  3464 	DM3CNT_L = 0x0000;

  3465 	DM3CNT_H = 0x0000;

  3466 	TM0D	 = 0x0000;

  3467 	TM0CNT	 = 0x0000;

  3468 	TM1D	 = 0x0000;

  3469 	TM1CNT	 = 0x0000;

  3470 	TM2D	 = 0x0000;

  3471 	TM2CNT	 = 0x0000;

  3472 	TM3D	 = 0x0000;

  3473 	TM3CNT	 = 0x0000;

  3474 	P1		 = 0x03FF;

  3475 	IE		 = 0x0000;

  3476 	IF		 = 0x0000;

  3477 	IME		 = 0x0000;

  3478 

  3479 	armMode = 0x1F;

  3480 

  3481 	if (cpuIsMultiBoot)

  3482 	{

  3483 		reg[13].I	   = 0x03007F00;

  3484 		reg[15].I	   = 0x02000000;

  3485 		reg[16].I	   = 0x00000000;

  3486 		reg[R13_IRQ].I = 0x03007FA0;

  3487 		reg[R13_SVC].I = 0x03007FE0;

  3488 		armIrqEnable   = true;

  3489 	}

  3490 	else

  3491 	{

  3492 		if (useBios && !skipBios)

  3493 		{

  3494 			reg[15].I	 = 0x00000000;

  3495 			armMode		 = 0x13;

  3496 			armIrqEnable = false;

  3497 		}

  3498 		else

  3499 		{

  3500 			reg[13].I	   = 0x03007F00;

  3501 			reg[15].I	   = 0x08000000;

  3502 			reg[16].I	   = 0x00000000;

  3503 			reg[R13_IRQ].I = 0x03007FA0;

  3504 			reg[R13_SVC].I = 0x03007FE0;

  3505 			armIrqEnable   = true;

  3506 		}

  3507 	}

  3508 	armState = true;

  3509 	C_FLAG	 = V_FLAG = N_FLAG = Z_FLAG = false;

  3510 	UPDATE_REG(0x00, DISPCNT);

  3511 	UPDATE_REG(0x20, BG2PA);

  3512 	UPDATE_REG(0x26, BG2PD);

  3513 	UPDATE_REG(0x30, BG3PA);

  3514 	UPDATE_REG(0x36, BG3PD);

  3515 	UPDATE_REG(0x130, P1);

  3516 	UPDATE_REG(0x88, 0x200);

  3517 

  3518 	// disable FIQ

  3519 	reg[16].I |= 0x40;

  3520 	CPUUpdateCPSR();

  3521 

  3522 	armNextPC  = reg[15].I;

  3523 	reg[15].I += 4;

  3524 

  3525 	// reset internal state

  3526 	holdState = false;

  3527 	holdType  = 0;

  3528 

  3529 	biosProtected[0] = 0x00;

  3530 	biosProtected[1] = 0xf0;

  3531 	biosProtected[2] = 0x29;

  3532 	biosProtected[3] = 0xe1;

  3533 

  3534 	BIOS_RegisterRamReset();

  3535 

  3536 	lcdTicks = 960;

  3537 	timer0On = false;

  3538 	timer0Ticks		  = 0;

  3539 	timer0Reload	  = 0;

  3540 	timer0ClockReload = 0;

  3541 	timer1On		  = false;

  3542 	timer1Ticks		  = 0;

  3543 	timer1Reload	  = 0;

  3544 	timer1ClockReload = 0;

  3545 	timer2On		  = false;

  3546 	timer2Ticks		  = 0;

  3547 	timer2Reload	  = 0;

  3548 	timer2ClockReload = 0;

  3549 	timer3On		  = false;

  3550 	timer3Ticks		  = 0;

  3551 	timer3Reload	  = 0;

  3552 	timer3ClockReload = 0;

  3553 	dma0Source		  = 0;

  3554 	dma0Dest		  = 0;

  3555 	dma1Source		  = 0;

  3556 	dma1Dest		  = 0;

  3557 	dma2Source		  = 0;

  3558 	dma2Dest		  = 0;

  3559 	dma3Source		  = 0;

  3560 	dma3Dest		  = 0;

  3561 	cpuSaveGameFunc	  = flashSaveDecide;

  3562 	renderLine		  = mode0RenderLine;

  3563 	fxOn			  = false;

  3564 	windowOn		  = false;

  3565 	frameSkipCount	  = 0;

  3566 	saveType		  = 0;

  3567 	layerEnable		  = DISPCNT & layerSettings;

  3568 

  3569 	CPUUpdateRenderBuffers(true);

  3570 

  3571 	for (int i = 0; i < 256; i++)

  3572 	{

  3573 		map[i].address = (u8 *)&dummyAddress;

  3574 		map[i].mask	   = 0;

  3575 	}

  3576 

  3577 	map[0].address	= bios;

  3578 	map[0].mask		= 0x3FFF;

  3579 	map[2].address	= workRAM;

  3580 	map[2].mask		= 0x3FFFF;

  3581 	map[3].address	= internalRAM;

  3582 	map[3].mask		= 0x7FFF;

  3583 	map[4].address	= ioMem;

  3584 	map[4].mask		= 0x3FF;

  3585 	map[5].address	= paletteRAM;

  3586 	map[5].mask		= 0x3FF;

  3587 	map[6].address	= vram;

  3588 	map[6].mask		= 0x1FFFF;

  3589 	map[7].address	= oam;

  3590 	map[7].mask		= 0x3FF;

  3591 	map[8].address	= rom;

  3592 	map[8].mask		= 0x1FFFFFF;

  3593 	map[9].address	= rom;

  3594 	map[9].mask		= 0x1FFFFFF;

  3595 	map[10].address = rom;

  3596 	map[10].mask	= 0x1FFFFFF;

  3597 	map[12].address = rom;

  3598 	map[12].mask	= 0x1FFFFFF;

  3599 	map[14].address = flashSaveMemory;

  3600 	map[14].mask	= 0xFFFF;

  3601 

  3602 	eepromReset();

  3603 	flashReset();

  3604 

  3605 	soundReset();

  3606 

  3607 	CPUUpdateWindow0();

  3608 	CPUUpdateWindow1();

  3609 

  3610 	// make sure registers are correctly initialized if not using BIOS

  3611 	if (!useBios)

  3612 	{

  3613 		if (cpuIsMultiBoot)

  3614 			BIOS_RegisterRamReset(0xfe);

  3615 		else

  3616 			BIOS_RegisterRamReset(0xff);

  3617 	}

  3618 	else

  3619 	{

  3620 		if (cpuIsMultiBoot)

  3621 			BIOS_RegisterRamReset(0xfe);

  3622 	}

  3623 

  3624 	switch (cpuSaveType)

  3625 	{

  3626 	case 0: // automatic

  3627 		cpuSramEnabled		   = true;

  3628 		cpuFlashEnabled		   = true;

  3629 		cpuEEPROMEnabled	   = true;

  3630 		cpuEEPROMSensorEnabled = false;

  3631 		break;

  3632 	case 1: // EEPROM

  3633 		cpuSramEnabled		   = false;

  3634 		cpuFlashEnabled		   = false;

  3635 		cpuEEPROMEnabled	   = true;

  3636 		cpuEEPROMSensorEnabled = false;

  3637 		break;

  3638 	case 2: // SRAM

  3639 		cpuSramEnabled		   = true;

  3640 		cpuFlashEnabled		   = false;

  3641 		cpuEEPROMEnabled	   = false;

  3642 		cpuEEPROMSensorEnabled = false;

  3643 		cpuSaveGameFunc		   = sramWrite;

  3644 		break;

  3645 	case 3: // FLASH

  3646 		cpuSramEnabled		   = false;

  3647 		cpuFlashEnabled		   = true;

  3648 		cpuEEPROMEnabled	   = false;

  3649 		cpuEEPROMSensorEnabled = false;

  3650 		cpuSaveGameFunc		   = flashWrite;

  3651 		break;

  3652 	case 4: // EEPROM+Sensor

  3653 		cpuSramEnabled		   = false;

  3654 		cpuFlashEnabled		   = false;

  3655 		cpuEEPROMEnabled	   = true;

  3656 		cpuEEPROMSensorEnabled = true;

  3657 		break;

  3658 	case 5: // NONE

  3659 		cpuSramEnabled		   = false;

  3660 		cpuFlashEnabled		   = false;

  3661 		cpuEEPROMEnabled	   = false;

  3662 		cpuEEPROMSensorEnabled = false;

  3663 		break;

  3664 	}

  3665 

  3666 	systemResetSensor();

  3667 

  3668 	systemSaveUpdateCounter = SYSTEM_SAVE_NOT_UPDATED;

  3669 

  3670 	gbaLastTime	  = systemGetClock();

  3671 	gbaFrameCount = 0;

  3672 

  3673 	systemRefreshScreen();

  3674 }

  3675 

  3676 void CPUInterrupt()

  3677 {

  3678 	u32	 PC			= reg[15].I;

  3679 	bool savedState = armState;

  3680 	CPUSwitchMode(0x12, true, false);

  3681 	reg[14].I = PC;

  3682 	if (!savedState)

  3683 		reg[14].I += 2;

  3684 	reg[15].I	 = 0x18;

  3685 	armState	 = true;

  3686 	armIrqEnable = false;

  3687 

  3688 	armNextPC  = reg[15].I;

  3689 	reg[15].I += 4;

  3690 

  3691 	//  if(!holdState)

  3692 	biosProtected[0] = 0x02;

  3693 	biosProtected[1] = 0xc0;

  3694 	biosProtected[2] = 0x5e;

  3695 	biosProtected[3] = 0xe5;

  3696 }

  3697 

  3698 void TogglePrefetchHack()

  3699 {

  3700 	memLagTempEnabled = !memLagTempEnabled;

  3701 

  3702 	if (emulating)

  3703 	{

  3704 		extern bool8 prefetchActive, prefetchPrevActive, prefetchApplies;

  3705 		if (prefetchApplies && prefetchActive == memLagTempEnabled)

  3706 		{

  3707 			prefetchActive = !prefetchActive;

  3708 			//if(prefetchActive && !prefetchPrevActive) systemScreenMessage("pre-fetch enabled",3,600);

  3709 			//if(!prefetchActive && prefetchPrevActive) systemScreenMessage("pre-fetch disabled",3,600);

  3710 			extern int32 memoryWaitFetch [16];

  3711 			if (prefetchActive)

  3712 				memoryWaitFetch[8]--;

  3713 			else

  3714 				memoryWaitFetch[8]++;

  3715 			prefetchPrevActive = prefetchActive;

  3716 		}

  3717 	}

  3718 }

  3719 

  3720 void SetPrefetchHack(bool set)

  3721 {

  3722 	if ((bool)memLagTempEnabled == set)

  3723 		TogglePrefetchHack();

  3724 }

  3725 

  3726 #ifdef SDL

  3727 void log(const char *defaultMsg, ...)

  3728 {

  3729 	char	buffer[2048];

  3730 	va_list valist;

  3731 

  3732 	va_start(valist, defaultMsg);

  3733 	vsprintf(buffer, defaultMsg, valist);

  3734 

  3735 	if (out == NULL)

  3736 	{

  3737 		out = fopen("trace.log", "w");

  3738 	}

  3739 

  3740 	fputs(buffer, out);

  3741 

  3742 	va_end(valist);

  3743 }

  3744 

  3745 #else

  3746 extern void winlog(const char *, ...);

  3747 #endif

  3748 

  3749 void CPULoop(int _ticks)

  3750 {

  3751 	int32 ticks = _ticks;

  3752 	int32 clockTicks;

  3753 	int32 cpuLoopTicks	= 0;

  3754 	int32 timerOverflow = 0;

  3755 	// variables used by the CPU core

  3756 

  3757 	extCpuLoopTicks = &cpuLoopTicks;

  3758 	extClockTicks	= &clockTicks;

  3759 	extTicks		= &ticks;

  3760 

  3761 	cpuLoopTicks = CPUUpdateTicks();

  3762 	if (cpuLoopTicks > ticks)

  3763 	{

  3764 		cpuLoopTicks  = ticks;

  3765 		cpuSavedTicks = ticks;

  3766 	}

  3767 

  3768 	if (intState)

  3769 	{

  3770 		cpuLoopTicks  = 5;

  3771 		cpuSavedTicks = 5;

  3772 	}

  3773 

  3774 	if (newFrame)

  3775 	{

  3776 		extern void VBAOnExitingFrameBoundary();

  3777 		VBAOnExitingFrameBoundary();

  3778 

  3779 		// update joystick information

  3780 		systemReadJoypads();

  3781 

  3782 		u32 joy = systemGetJoypad(0, cpuEEPROMSensorEnabled);

  3783 

  3784 //		if (cpuEEPROMSensorEnabled)

  3785 //			systemUpdateMotionSensor(0);

  3786 

  3787 		P1 = 0x03FF ^ (joy & 0x3FF);

  3788 		UPDATE_REG(0x130, P1);

  3789 		u16 P1CNT = READ16LE(((u16 *)&ioMem[0x132]));

  3790 		// this seems wrong, but there are cases where the game

  3791 		// can enter the stop state without requesting an IRQ from

  3792 		// the joypad.

  3793 		if ((P1CNT & 0x4000) || stopState)

  3794 		{

  3795 			u16 p1 = (0x3FF ^ P1) & 0x3FF;

  3796 			if (P1CNT & 0x8000)

  3797 			{

  3798 				if (p1 == (P1CNT & 0x3FF))

  3799 				{

  3800 					IF |= 0x1000;

  3801 					UPDATE_REG(0x202, IF);

  3802 				}

  3803 			}

  3804 			else

  3805 			{

  3806 				if (p1 & P1CNT)

  3807 				{

  3808 					IF |= 0x1000;

  3809 					UPDATE_REG(0x202, IF);

  3810 				}

  3811 			}

  3812 		}

  3813 

  3814 		// HACK: some special "buttons"

  3815 		extButtons = (joy >> 18);

  3816 		speedup	   = (extButtons & 1) != 0;

  3817 

  3818 		VBAMovieResetIfRequested();

  3819 

  3820 		CallRegisteredLuaFunctions(LUACALL_BEFOREEMULATION);

  3821 

  3822 		newFrame = false;

  3823 	}

  3824 

  3825 	for (;; )

  3826 	{

  3827 #ifndef FINAL_VERSION

  3828 		if (systemDebug)

  3829 		{

  3830 			if (systemDebug >= 10 && !holdState)

  3831 			{

  3832 				CPUUpdateCPSR();

  3833 				sprintf(

  3834 				    buffer,

  3835 				    "R00=%08x R01=%08x R02=%08x R03=%08x R04=%08x R05=%08x R06=%08x R07=%08x R08=%08x"

  3836 				    "R09=%08x R10=%08x R11=%08x R12=%08x R13=%08x R14=%08x R15=%08x R16=%08x R17=%08x\n",

  3837 				    reg[0].I,

  3838 				    reg[1].I,

  3839 				    reg[2].I,

  3840 				    reg[3].I,

  3841 				    reg[4].I,

  3842 				    reg[5].I,

  3843 				    reg[6].I,

  3844 				    reg[7].I,

  3845 				    reg[8].I,

  3846 				    reg[9].I,

  3847 				    reg[10].I,

  3848 				    reg[11].I,

  3849 				    reg[12].I,

  3850 				    reg[13].I,

  3851 				    reg[14].I,

  3852 				    reg[15].I,

  3853 				    reg[16].I,

  3854 				    reg[17].I);

  3855 #ifdef SDL

  3856 				log(buffer);

  3857 #else

  3858 				winlog(buffer);

  3859 #endif

  3860 			}

  3861 			else if (!holdState)

  3862 			{

  3863 				sprintf(buffer, "PC=%08x\n", armNextPC);

  3864 #ifdef SDL

  3865 				log(buffer);

  3866 #else

  3867 				winlog(buffer);

  3868 #endif

  3869 			}

  3870 		}

  3871 #endif

  3872 

  3873 		if (!holdState)

  3874 		{

  3875 			if (armState)

  3876 			{

  3877 				CallRegisteredLuaMemHook(armNextPC, 4, CPUReadMemoryQuick(armNextPC), LUAMEMHOOK_EXEC);

  3878 #include "arm-new.h"

  3879 			}

  3880 			else

  3881 			{

  3882 				CallRegisteredLuaMemHook(armNextPC, 2, CPUReadHalfWordQuick(armNextPC), LUAMEMHOOK_EXEC);

  3883 #include "thumb.h"

  3884 			}

  3885 		}

  3886 		else

  3887 		{

  3888 			clockTicks = lcdTicks;

  3889 

  3890 			if (soundTicks < clockTicks)

  3891 				clockTicks = soundTicks;

  3892 

  3893 			if (timer0On && (timer0Ticks < clockTicks))

  3894 			{

  3895 				clockTicks = timer0Ticks;

  3896 			}

  3897 			if (timer1On && (timer1Ticks < clockTicks))

  3898 			{

  3899 				clockTicks = timer1Ticks;

  3900 			}

  3901 			if (timer2On && (timer2Ticks < clockTicks))

  3902 			{

  3903 				clockTicks = timer2Ticks;

  3904 			}

  3905 			if (timer3On && (timer3Ticks < clockTicks))

  3906 			{

  3907 				clockTicks = timer3Ticks;

  3908 			}

  3909 #ifdef PROFILING

  3910 			if (profilingTicksReload != 0)

  3911 			{

  3912 				if (profilingTicks < clockTicks)

  3913 				{

  3914 					clockTicks = profilingTicks;

  3915 				}

  3916 			}

  3917 #endif

  3918 		}

  3919 

  3920 		cpuLoopTicks -= clockTicks;

  3921 		if ((cpuLoopTicks <= 0))

  3922 		{

  3923 			if (cpuSavedTicks)

  3924 			{

  3925 				clockTicks = cpuSavedTicks; // + cpuLoopTicks;

  3926 			}

  3927 			cpuDmaTicksToUpdate = -cpuLoopTicks;

  3928 

  3929 updateLoop:

  3930 			lcdTicks -= clockTicks;

  3931 

  3932 			if (lcdTicks <= 0)

  3933 			{

  3934 				if (DISPSTAT & 1) // V-BLANK

  3935 				{ // if in V-Blank mode, keep computing...

  3936 					if (DISPSTAT & 2)

  3937 					{

  3938 						lcdTicks += 960;

  3939 						VCOUNT++;

  3940 						UPDATE_REG(0x06, VCOUNT);

  3941 						DISPSTAT &= 0xFFFD;

  3942 						UPDATE_REG(0x04, DISPSTAT);

  3943 						CPUCompareVCOUNT();

  3944 					}

  3945 					else

  3946 					{

  3947 						lcdTicks += 272;

  3948 						DISPSTAT |= 2;

  3949 						UPDATE_REG(0x04, DISPSTAT);

  3950 						if (DISPSTAT & 16)

  3951 						{

  3952 							IF |= 2;

  3953 							UPDATE_REG(0x202, IF);

  3954 						}

  3955 					}

  3956 

  3957 					if (VCOUNT >= 228)

  3958 					{

  3959 						DISPSTAT &= 0xFFFC;

  3960 						UPDATE_REG(0x04, DISPSTAT);

  3961 						VCOUNT = 0;

  3962 						UPDATE_REG(0x06, VCOUNT);

  3963 						CPUCompareVCOUNT();

  3964 					}

  3965 				}

  3966 				else

  3967 				{

  3968 					int framesToSkip = systemFramesToSkip();

  3969 

  3970 					if (DISPSTAT & 2)

  3971 					{

  3972 						// if in H-Blank, leave it and move to drawing mode

  3973 						VCOUNT++;

  3974 						UPDATE_REG(0x06, VCOUNT);

  3975 

  3976 						lcdTicks += 960;

  3977 						DISPSTAT &= 0xFFFD;

  3978 						if (VCOUNT == 160)

  3979 						{

  3980 							DISPSTAT |= 1;

  3981 							DISPSTAT &= 0xFFFD;

  3982 							UPDATE_REG(0x04, DISPSTAT);

  3983 							if (DISPSTAT & 0x0008)

  3984 							{

  3985 								IF |= 1;

  3986 								UPDATE_REG(0x202, IF);

  3987 							}

  3988 							CPUCheckDMA(1, 0x0f);

  3989 

  3990 							systemFrame();

  3991 

  3992 							++gbaFrameCount;

  3993 							u32 gbaCurrentTime = systemGetClock();

  3994 							if (gbaCurrentTime - gbaLastTime >= 1000)

  3995 							{

  3996 								systemShowSpeed(int(float(gbaFrameCount) * 100000 / (float(gbaCurrentTime - gbaLastTime) * 60) + .5f));

  3997 								gbaLastTime	  = gbaCurrentTime;

  3998 								gbaFrameCount = 0;

  3999 							}

  4000 

  4001 							++GBASystemCounters.frameCount;

  4002 							if (GBASystemCounters.lagged)

  4003 							{

  4004 								++GBASystemCounters.lagCount;

  4005 							}

  4006 							GBASystemCounters.laggedLast = GBASystemCounters.lagged;

  4007 							GBASystemCounters.lagged	 = true;

  4008 

  4009 							if (cheatsEnabled)

  4010 								cheatsCheckKeys(P1 ^ 0x3FF, extButtons);

  4011 

  4012 							extern void VBAOnEnteringFrameBoundary();

  4013 							VBAOnEnteringFrameBoundary();

  4014 

  4015 							newFrame = true;

  4016 

  4017 							pauseAfterFrameAdvance = systemPauseOnFrame();

  4018 

  4019 							if (frameSkipCount >= framesToSkip || pauseAfterFrameAdvance)

  4020 							{

  4021 								systemRenderFrame();

  4022 								frameSkipCount = 0;

  4023 

  4024 								bool capturePressed = (extButtons & 2) != 0;

  4025 								if (capturePressed && !capturePrevious)

  4026 								{

  4027 									captureNumber = systemScreenCapture(captureNumber);

  4028 								}

  4029 								capturePrevious = capturePressed && !pauseAfterFrameAdvance;

  4030 							}

  4031 							else

  4032 							{

  4033 								++frameSkipCount;

  4034 							}

  4035 

  4036 							if (pauseAfterFrameAdvance)

  4037 							{

  4038 								systemSetPause(true);

  4039 							}

  4040 						}

  4041 

  4042 						UPDATE_REG(0x04, DISPSTAT);

  4043 						CPUCompareVCOUNT();

  4044 					}

  4045 					else

  4046 					{

  4047 						if (frameSkipCount >= framesToSkip || pauseAfterFrameAdvance)

  4048 						{

  4049 							(*renderLine)();

  4050 

  4051 							switch (systemColorDepth)

  4052 							{

  4053 							case 16:

  4054 							{

  4055 								u16 *dest = (u16 *)pix + 242 * (VCOUNT + 1);

  4056 								for (int x = 0; x < 240; )

  4057 								{

  4058 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4059 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4060 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4061 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4062 

  4063 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4064 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4065 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4066 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4067 

  4068 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4069 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4070 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4071 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4072 

  4073 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4074 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4075 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4076 									*dest++ = systemColorMap16[lineMix[x++] & 0xFFFF];

  4077 								}

  4078 								// for filters that read past the screen

  4079 								*dest++ = 0;

  4080 								break;

  4081 							}

  4082 							case 24:

  4083 							{

  4084 								u8 *dest = (u8 *)pix + 240 * VCOUNT * 3;

  4085 								for (int x = 0; x < 240; )

  4086 								{

  4087 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4088 									dest += 3;

  4089 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4090 									dest += 3;

  4091 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4092 									dest += 3;

  4093 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4094 									dest += 3;

  4095 

  4096 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4097 									dest += 3;

  4098 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4099 									dest += 3;

  4100 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4101 									dest += 3;

  4102 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4103 									dest += 3;

  4104 

  4105 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4106 									dest += 3;

  4107 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4108 									dest += 3;

  4109 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4110 									dest += 3;

  4111 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4112 									dest += 3;

  4113 

  4114 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4115 									dest += 3;

  4116 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4117 									dest += 3;

  4118 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4119 									dest += 3;

  4120 									*((u32 *)dest) = systemColorMap32[lineMix[x++] & 0xFFFF];

  4121 									dest += 3;

  4122 								}

  4123 								break;

  4124 							}

  4125 							case 32:

  4126 							{

  4127 								u32 *dest = (u32 *)pix + 241 * (VCOUNT + 1);

  4128 								for (int x = 0; x < 240; )

  4129 								{

  4130 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4131 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4132 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4133 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4134 

  4135 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4136 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4137 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4138 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4139 

  4140 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4141 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4142 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4143 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4144 

  4145 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4146 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4147 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4148 									*dest++ = systemColorMap32[lineMix[x++] & 0xFFFF];

  4149 								}

  4150 								break;

  4151 							}

  4152 							}

  4153 						}

  4154 						// entering H-Blank

  4155 						DISPSTAT |= 2;

  4156 						UPDATE_REG(0x04, DISPSTAT);

  4157 						lcdTicks += 272;

  4158 						CPUCheckDMA(2, 0x0f);

  4159 						if (DISPSTAT & 16)

  4160 						{

  4161 							IF |= 2;

  4162 							UPDATE_REG(0x202, IF);

  4163 						}

  4164 					}

  4165 				}

  4166 			}

  4167 

  4168 			if (!stopState)

  4169 			{

  4170 				if (timer0On)

  4171 				{

  4172 					if (timer0ClockReload == 1)

  4173 					{

  4174 						u32 tm0d = TM0D + clockTicks;

  4175 						if (tm0d > 0xffff)

  4176 						{

  4177 							tm0d += timer0Reload;

  4178 							timerOverflow |= 1;

  4179 							soundTimerOverflow(0);

  4180 							if (TM0CNT & 0x40)

  4181 							{

  4182 								IF |= 0x08;

  4183 								UPDATE_REG(0x202, IF);

  4184 							}

  4185 						}

  4186 						TM0D		= tm0d & 0xFFFF;

  4187 						timer0Ticks = 0x10000 - TM0D;

  4188 						UPDATE_REG(0x100, TM0D);

  4189 					}

  4190 					else

  4191 					{

  4192 						timer0Ticks -= clockTicks;

  4193 						if (timer0Ticks <= 0)

  4194 						{

  4195 							timer0Ticks += timer0ClockReload;

  4196 							TM0D++;

  4197 							if (TM0D == 0)

  4198 							{

  4199 								TM0D = timer0Reload;

  4200 								timerOverflow |= 1;

  4201 								soundTimerOverflow(0);

  4202 								if (TM0CNT & 0x40)

  4203 								{

  4204 									IF |= 0x08;

  4205 									UPDATE_REG(0x202, IF);

  4206 								}

  4207 							}

  4208 							UPDATE_REG(0x100, TM0D);

  4209 						}

  4210 					}

  4211 				}

  4212 

  4213 				if (timer1On)

  4214 				{

  4215 					if (TM1CNT & 4)

  4216 					{

  4217 						if (timerOverflow & 1)

  4218 						{

  4219 							TM1D++;

  4220 							if (TM1D == 0)

  4221 							{

  4222 								TM1D += timer1Reload;

  4223 								timerOverflow |= 2;

  4224 								soundTimerOverflow(1);

  4225 								if (TM1CNT & 0x40)

  4226 								{

  4227 									IF |= 0x10;

  4228 									UPDATE_REG(0x202, IF);

  4229 								}

  4230 							}

  4231 							UPDATE_REG(0x104, TM1D);

  4232 						}

  4233 					}

  4234 					else

  4235 					{

  4236 						if (timer1ClockReload == 1)

  4237 						{

  4238 							u32 tm1d = TM1D + clockTicks;

  4239 							if (tm1d > 0xffff)

  4240 							{

  4241 								tm1d += timer1Reload;

  4242 								timerOverflow |= 2;

  4243 								soundTimerOverflow(1);

  4244 								if (TM1CNT & 0x40)

  4245 								{

  4246 									IF |= 0x10;

  4247 									UPDATE_REG(0x202, IF);

  4248 								}

  4249 							}

  4250 							TM1D		= tm1d & 0xFFFF;

  4251 							timer1Ticks = 0x10000 - TM1D;

  4252 							UPDATE_REG(0x104, TM1D);

  4253 						}

  4254 						else

  4255 						{

  4256 							timer1Ticks -= clockTicks;

  4257 							if (timer1Ticks <= 0)

  4258 							{

  4259 								timer1Ticks += timer1ClockReload;

  4260 								TM1D++;

  4261 

  4262 								if (TM1D == 0)

  4263 								{

  4264 									TM1D = timer1Reload;

  4265 									timerOverflow |= 2;

  4266 									soundTimerOverflow(1);

  4267 									if (TM1CNT & 0x40)

  4268 									{

  4269 										IF |= 0x10;

  4270 										UPDATE_REG(0x202, IF);

  4271 									}

  4272 								}

  4273 								UPDATE_REG(0x104, TM1D);

  4274 							}

  4275 						}

  4276 					}

  4277 				}

  4278 

  4279 				if (timer2On)

  4280 				{

  4281 					if (TM2CNT & 4)

  4282 					{

  4283 						if (timerOverflow & 2)

  4284 						{

  4285 							TM2D++;

  4286 							if (TM2D == 0)

  4287 							{

  4288 								TM2D += timer2Reload;

  4289 								timerOverflow |= 4;

  4290 								if (TM2CNT & 0x40)

  4291 								{

  4292 									IF |= 0x20;

  4293 									UPDATE_REG(0x202, IF);

  4294 								}

  4295 							}

  4296 							UPDATE_REG(0x108, TM2D);

  4297 						}

  4298 					}

  4299 					else

  4300 					{

  4301 						if (timer2ClockReload == 1)

  4302 						{

  4303 							u32 tm2d = TM2D + clockTicks;

  4304 							if (tm2d > 0xffff)

  4305 							{

  4306 								tm2d += timer2Reload;

  4307 								timerOverflow |= 4;

  4308 								if (TM2CNT & 0x40)

  4309 								{

  4310 									IF |= 0x20;

  4311 									UPDATE_REG(0x202, IF);

  4312 								}

  4313 							}

  4314 							TM2D		= tm2d & 0xFFFF;

  4315 							timer2Ticks = 0x10000 - TM2D;

  4316 							UPDATE_REG(0x108, TM2D);

  4317 						}

  4318 						else

  4319 						{

  4320 							timer2Ticks -= clockTicks;

  4321 							if (timer2Ticks <= 0)

  4322 							{

  4323 								timer2Ticks += timer2ClockReload;

  4324 								TM2D++;

  4325 

  4326 								if (TM2D == 0)

  4327 								{

  4328 									TM2D = timer2Reload;

  4329 									timerOverflow |= 4;

  4330 									if (TM2CNT & 0x40)

  4331 									{

  4332 										IF |= 0x20;

  4333 										UPDATE_REG(0x202, IF);

  4334 									}

  4335 								}

  4336 								UPDATE_REG(0x108, TM2D);

  4337 							}

  4338 						}

  4339 					}

  4340 				}

  4341 

  4342 				if (timer3On)

  4343 				{

  4344 					if (TM3CNT & 4)

  4345 					{

  4346 						if (timerOverflow & 4)

  4347 						{

  4348 							TM3D++;

  4349 							if (TM3D == 0)

  4350 							{

  4351 								TM3D += timer3Reload;

  4352 								if (TM3CNT & 0x40)

  4353 								{

  4354 									IF |= 0x40;

  4355 									UPDATE_REG(0x202, IF);

  4356 								}

  4357 							}

  4358 							UPDATE_REG(0x10c, TM3D);

  4359 						}

  4360 					}

  4361 					else

  4362 					{

  4363 						if (timer3ClockReload == 1)

  4364 						{

  4365 							u32 tm3d = TM3D + clockTicks;

  4366 							if (tm3d > 0xffff)

  4367 							{

  4368 								tm3d += timer3Reload;

  4369 								if (TM3CNT & 0x40)

  4370 								{

  4371 									IF |= 0x40;

  4372 									UPDATE_REG(0x202, IF);

  4373 								}

  4374 							}

  4375 							TM3D		= tm3d & 0xFFFF;

  4376 							timer3Ticks = 0x10000 - TM3D;

  4377 							UPDATE_REG(0x10C, TM3D);

  4378 						}

  4379 						else

  4380 						{

  4381 							timer3Ticks -= clockTicks;

  4382 							if (timer3Ticks <= 0)

  4383 							{

  4384 								timer3Ticks += timer3ClockReload;

  4385 								TM3D++;

  4386 

  4387 								if (TM3D == 0)

  4388 								{

  4389 									TM3D = timer3Reload;

  4390 									if (TM3CNT & 0x40)

  4391 									{

  4392 										IF |= 0x40;

  4393 										UPDATE_REG(0x202, IF);

  4394 									}

  4395 								}

  4396 								UPDATE_REG(0x10C, TM3D);

  4397 							}

  4398 						}

  4399 					}

  4400 				}

  4401 			}

  4402 			// we shouldn't be doing sound in stop state, but we lose synchronization

  4403 			// if sound is disabled, so in stop state, soundTick will just produce

  4404 			// mute sound

  4405 			soundTicks -= clockTicks;

  4406 			if (soundTicks < 1)

  4407 			{

  4408 				soundTick();

  4409 				soundTicks += SOUND_CLOCK_TICKS;

  4410 			}

  4411 			timerOverflow = 0;

  4412 

  4413 #ifdef PROFILING

  4414 			profilingTicks -= clockTicks;

  4415 			if (profilingTicks <= 0)

  4416 			{

  4417 				profilingTicks += profilingTicksReload;

  4418 				if (profilBuffer && profilSize)

  4419 				{

  4420 					u16 *b	= (u16 *)profilBuffer;

  4421 					int	 pc = ((reg[15].I - profilLowPC) * profilScale) / 0x10000;

  4422 					if (pc >= 0 && pc < profilSize)

  4423 					{

  4424 						b[pc]++;

  4425 					}

  4426 				}

  4427 			}

  4428 #endif

  4429 

  4430 			ticks		-= clockTicks;

  4431 			cpuLoopTicks = CPUUpdateTicks();

  4432 

  4433 			// FIXME: it is too bad that it is still not determined whether the loop can be exited at this point

  4434 			if (cpuDmaTicksToUpdate > 0)

  4435 			{

  4436 				clockTicks = cpuSavedTicks;

  4437 				if (clockTicks > cpuDmaTicksToUpdate)

  4438 					clockTicks = cpuDmaTicksToUpdate;

  4439 				cpuDmaTicksToUpdate -= clockTicks;

  4440 				if (cpuDmaTicksToUpdate < 0)

  4441 					cpuDmaTicksToUpdate = 0;

  4442 				goto updateLoop;    // this is evil

  4443 			}

  4444 

  4445 			if (IF && (IME & 1) && armIrqEnable)

  4446 			{

  4447 				int res = IF & IE;

  4448 				if (stopState)

  4449 					res &= 0x3080;

  4450 				if (res)

  4451 				{

  4452 					if (intState)

  4453 					{

  4454 						CPUInterrupt();

  4455 						intState = false;

  4456 						if (holdState)

  4457 						{

  4458 							holdState = false;

  4459 							stopState = false;

  4460 						}

  4461 					}

  4462 					else

  4463 					{

  4464 						if (!holdState)

  4465 						{

  4466 							intState	  = true;

  4467 							cpuLoopTicks  = 5;

  4468 							cpuSavedTicks = 5;

  4469 						}

  4470 						else

  4471 						{

  4472 							CPUInterrupt();

  4473 							if (holdState)

  4474 							{

  4475 								holdState = false;

  4476 								stopState = false;

  4477 							}

  4478 						}

  4479 					}

  4480 				}

  4481 			}

  4482 

  4483 			if (useOldFrameTiming)

  4484 			{

  4485 				if (ticks <= 0)

  4486 				{

  4487 					newFrame = true;

  4488 					break;

  4489 				}

  4490 			}

  4491 			else if (newFrame)

  4492 			{

  4493 				// FIXME: it should be enough to use frameBoundary only if there were no need for supporting the old timing

  4494 				// but is there still any GBA .vbm that uses the old timing?

  4495 ///				extern void VBAOnEnteringFrameBoundary();

  4496 ///				VBAOnEnteringFrameBoundary();

  4497 

  4498 				break;

  4499 			}

  4500 		}

  4501 	}

  4502 }

  4503 

  4504 struct EmulatedSystem GBASystem =

  4505 {

  4506 	// emuMain

  4507 	CPULoop,

  4508 	// emuReset

  4509 	CPUReset,

  4510 	// emuCleanUp

  4511 	CPUCleanUp,

  4512 	// emuReadBattery

  4513 	CPUReadBatteryFile,

  4514 	// emuWriteBattery

  4515 	CPUWriteBatteryFile,

  4516 	// emuReadBatteryFromStream

  4517 	CPUReadBatteryFromStream,

  4518 	// emuWriteBatteryToStream

  4519 	CPUWriteBatteryToStream,

  4520 	// emuReadState

  4521 	CPUReadState,

  4522 	// emuWriteState

  4523 	CPUWriteState,

  4524 	// emuReadStateFromStream

  4525 	CPUReadStateFromStream,

  4526 	// emuWriteStateToStream

  4527 	CPUWriteStateToStream,

  4528 	// emuReadMemState

  4529 	CPUReadMemState,

  4530 	// emuWriteMemState

  4531 	CPUWriteMemState,

  4532 	// emuWritePNG

  4533 	CPUWritePNGFile,

  4534 	// emuWriteBMP

  4535 	CPUWriteBMPFile,

  4536 	// emuUpdateCPSR

  4537 	CPUUpdateCPSR,

  4538 	// emuHasDebugger

  4539 	true,

  4540 	// emuCount

  4541 #ifdef FINAL_VERSION

  4542 	250000,

  4543 #else

  4544 	5000,

  4545 #endif

  4546 };

  4547 

  4548 // is there a reason to use more than one set of counters?

  4549 EmulatedSystemCounters &GBASystemCounters = systemCounters;

  4550 

  4551 /*

  4552    EmulatedSystemCounters GBASystemCounters =

  4553    {

  4554     // frameCount

  4555     0,

  4556     // lagCount

  4557     0,

  4558     // lagged

  4559     true,

  4560     // laggedLast

  4561     true,

  4562    };

  4563  */

  4564 

  4565 

  4566 #undef CPU_BREAK_LOOP

  4567 #undef CPU_BREAK_LOOP2
author	Robert McIntyre <rlm@mit.edu>
date	Sun, 04 Mar 2012 20:32:31 -0600
parents	f9f4f1b99eed
children