1 // This is part of Pico Library
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3 // (c) Copyright 2004 Dave, All rights reserved.
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4 // (c) Copyright 2006,2007 notaz, All rights reserved.
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5 // Free for non-commercial use.
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7 // For commercial use, separate licencing terms must be obtained.
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10 #include "PicoInt.h"
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12 #include "sound/ym2612.h"
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13 #include "sound/sn76496.h"
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15 #ifndef UTYPES_DEFINED
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16 typedef unsigned char u8;
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17 typedef unsigned short u16;
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18 typedef unsigned int u32;
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19 #define UTYPES_DEFINED
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22 extern unsigned int lastSSRamWrite; // used by serial SRAM code
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24 #ifdef _ASM_MEMORY_C
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25 u32 PicoRead8(u32 a);
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26 u32 PicoRead16(u32 a);
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27 void PicoWrite8(u32 a,u8 d);
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28 void PicoWriteRomHW_SSF2(u32 a,u32 d);
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32 #ifdef EMU_CORE_DEBUG
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33 u32 lastread_a, lastread_d[16]={0,}, lastwrite_cyc_d[16]={0,}, lastwrite_mus_d[16]={0,};
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34 int lrp_cyc=0, lrp_mus=0, lwp_cyc=0, lwp_mus=0;
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35 extern unsigned int ppop;
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39 void log_io(unsigned int addr, int bits, int rw);
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40 #elif defined(_MSC_VER)
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46 #if defined(EMU_C68K)
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47 static __inline int PicoMemBase(u32 pc)
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51 if (pc<Pico.romsize+4)
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53 membase=(int)Pico.rom; // Program Counter in Rom
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55 else if ((pc&0xe00000)==0xe00000)
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57 membase=(int)Pico.ram-(pc&0xff0000); // Program Counter in Ram
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61 // Error - Program Counter is invalid
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62 membase=(int)Pico.rom;
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70 PICO_INTERNAL u32 PicoCheckPc(u32 pc)
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73 #if defined(EMU_C68K)
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74 pc-=PicoCpuCM68k.membase; // Get real pc
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79 printf("%i:%03i: game crash detected @ %06x\n", Pico.m.frame_count, Pico.m.scanline, SekPc);
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80 return (int)Pico.rom + Pico.romsize; // common crash condition, can happen if acc timing is off
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83 PicoCpuCM68k.membase=PicoMemBase(pc&0x00ffffff);
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84 PicoCpuCM68k.membase-=pc&0xff000000;
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86 ret = PicoCpuCM68k.membase+pc;
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92 PICO_INTERNAL int PicoInitPc(u32 pc)
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98 #ifndef _ASM_MEMORY_C
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99 PICO_INTERNAL_ASM void PicoMemReset(void)
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104 // -----------------------------------------------------------------
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108 int pad,value,data_reg;
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109 pad=~PicoPad[i]; // Get inverse of pad MXYZ SACB RLDU
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110 data_reg=Pico.ioports[i+1];
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112 // orr the bits, which are set as output
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113 value = data_reg&(Pico.ioports[i+4]|0x80);
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115 if (PicoOpt & POPT_6BTN_PAD)
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117 int phase = Pico.m.padTHPhase[i];
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119 if(phase == 2 && !(data_reg&0x40)) { // TH
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120 value|=(pad&0xc0)>>2; // ?0SA 0000
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122 } else if(phase == 3) {
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124 value|=(pad&0x30)|((pad>>8)&0xf); // ?1CB MXYZ
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126 value|=((pad&0xc0)>>2)|0x0f; // ?0SA 1111
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131 if(data_reg&0x40) // TH
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132 value|=(pad&0x3f); // ?1CB RLDU
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133 else value|=((pad&0xc0)>>2)|(pad&3); // ?0SA 00DU
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135 return value; // will mirror later
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139 #ifndef _ASM_MEMORY_C
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142 u32 SRAMRead(u32 a)
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144 unsigned int sreg = Pico.m.sram_reg;
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145 if (!(sreg & 0x10) && (sreg & 1) && a > 0x200001) { // not yet detected SRAM
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146 elprintf(EL_SRAMIO, "normal sram detected.");
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147 Pico.m.sram_reg|=0x10; // should be normal SRAM
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149 if (sreg & 4) // EEPROM read
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150 return SRAMReadEEPROM();
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151 else // if(sreg & 1) // (sreg&5) is one of prerequisites
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152 return *(u8 *)(SRam.data-SRam.start+a);
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155 #ifndef _ASM_MEMORY_C
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158 u32 SRAMRead16(u32 a)
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161 if (Pico.m.sram_reg & 4) {
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162 d = SRAMReadEEPROM();
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165 u8 *pm=(u8 *)(SRam.data-SRam.start+a);
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172 static void SRAMWrite(u32 a, u32 d)
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174 unsigned int sreg = Pico.m.sram_reg;
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175 if(!(sreg & 0x10)) {
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176 // not detected SRAM
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177 if((a&~1)==0x200000) {
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178 elprintf(EL_SRAMIO, "eeprom detected.");
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179 sreg|=4; // this should be a game with EEPROM (like NBA Jam)
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180 SRam.start=0x200000; SRam.end=SRam.start+1;
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182 elprintf(EL_SRAMIO, "normal sram detected.");
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184 Pico.m.sram_reg=sreg;
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186 if(sreg & 4) { // EEPROM write
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187 // this diff must be at most 16 for NBA Jam to work
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188 if(SekCyclesDoneT()-lastSSRamWrite < 16) {
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189 // just update pending state
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190 elprintf(EL_EEPROM, "eeprom: skip because cycles=%i", SekCyclesDoneT()-lastSSRamWrite);
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191 SRAMUpdPending(a, d);
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194 SRAMWriteEEPROM(sreg>>6); // execute pending
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195 SRAMUpdPending(a, d);
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196 if ((old^Pico.m.sram_reg)&0xc0) // update time only if SDA/SCL changed
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197 lastSSRamWrite = SekCyclesDoneT();
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199 } else if(!(sreg & 2)) {
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200 u8 *pm=(u8 *)(SRam.data-SRam.start+a);
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208 // for nonstandard reads
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209 static u32 OtherRead16End(u32 a, int realsize)
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215 if (a == 0xa130ec) { d = 0x4d41; goto end; } // MA
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216 else if (a == 0xa130ee) { d = 0x5253; goto end; } // RS
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217 else if (a == 0xa15100) { d = 0x0080; goto end; }
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221 // for games with simple protection devices, discovered by Haze
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222 // some dumb detection is used, but that should be enough to make things work
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223 if ((a>>22) == 1 && Pico.romsize >= 512*1024) {
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224 if (*(int *)(Pico.rom+0x123e4) == 0x00550c39 && *(int *)(Pico.rom+0x123e8) == 0x00000040) { // Super Bubble Bobble (Unl) [!]
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225 if (a == 0x400000) { d=0x55<<8; goto end; }
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226 else if (a == 0x400002) { d=0x0f<<8; goto end; }
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228 else if (*(int *)(Pico.rom+0x008c4) == 0x66240055 && *(int *)(Pico.rom+0x008c8) == 0x00404df9) { // Smart Mouse (Unl)
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229 if (a == 0x400000) { d=0x55<<8; goto end; }
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230 else if (a == 0x400002) { d=0x0f<<8; goto end; }
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231 else if (a == 0x400004) { d=0xaa<<8; goto end; }
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232 else if (a == 0x400006) { d=0xf0<<8; goto end; }
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234 else if (*(int *)(Pico.rom+0x00404) == 0x00a90600 && *(int *)(Pico.rom+0x00408) == 0x6708b013) { // King of Fighters '98, The (Unl) [!]
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235 if (a == 0x480000 || a == 0x4800e0 || a == 0x4824a0 || a == 0x488880) { d=0xaa<<8; goto end; }
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236 else if (a == 0x4a8820) { d=0x0a<<8; goto end; }
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237 // there is also a read @ 0x4F8820 which needs 0, but that is returned in default case
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239 else if (*(int *)(Pico.rom+0x01b24) == 0x004013f9 && *(int *)(Pico.rom+0x01b28) == 0x00ff0000) { // Mahjong Lover (Unl) [!]
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240 if (a == 0x400000) { d=0x90<<8; goto end; }
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241 else if (a == 0x401000) { d=0xd3<<8; goto end; } // this one doesn't seem to be needed, the code does 2 comparisons and only then
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242 // checks the result, which is of the above one. Left it just in case.
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244 else if (*(int *)(Pico.rom+0x05254) == 0x0c3962d0 && *(int *)(Pico.rom+0x05258) == 0x00400055) { // Elf Wor (Unl)
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245 if (a == 0x400000) { d=0x55<<8; goto end; }
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246 else if (a == 0x400004) { d=0xc9<<8; goto end; } // this check is done if the above one fails
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247 else if (a == 0x400002) { d=0x0f<<8; goto end; }
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248 else if (a == 0x400006) { d=0x18<<8; goto end; } // similar to above
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250 // our default behaviour is to return whatever was last written a 0x400000-0x7fffff range (used by Squirrel King (R) [!])
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251 // Lion King II, The (Unl) [!] writes @ 400000 and wants to get that val @ 400002 and wites another val
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252 // @ 400004 which is expected @ 400006, so we really remember 2 values here
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253 d = Pico.m.prot_bytes[(a>>2)&1]<<8;
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255 else if (a == 0xa13000 && Pico.romsize >= 1024*1024) {
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256 if (*(int *)(Pico.rom+0xc8af0) == 0x30133013 && *(int *)(Pico.rom+0xc8af4) == 0x000f0240) { // Rockman X3 (Unl) [!]
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259 else if (*(int *)(Pico.rom+0x28888) == 0x07fc0000 && *(int *)(Pico.rom+0x2888c) == 0x4eb94e75) { // Bug's Life, A (Unl) [!]
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260 d=0x28; goto end; // does the check from RAM
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262 else if (*(int *)(Pico.rom+0xc8778) == 0x30133013 && *(int *)(Pico.rom+0xc877c) == 0x000f0240) { // Super Mario Bros. (Unl) [!]
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263 d=0x0c; goto end; // seems to be the same code as in Rockman X3 (Unl) [!]
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265 else if (*(int *)(Pico.rom+0xf20ec) == 0x30143013 && *(int *)(Pico.rom+0xf20f0) == 0x000f0200) { // Super Mario 2 1998 (Unl) [!]
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269 else if (a == 0xa13002) { // Pocket Monsters (Unl)
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272 else if (a == 0xa1303E) { // Pocket Monsters (Unl)
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275 else if (a == 0x30fe02) {
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276 // Virtua Racing - just for fun
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277 // this seems to be some flag that SVP is ready or something similar
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282 elprintf(EL_UIO, "strange r%i: [%06x] %04x @%06x", realsize, a&0xffffff, d, SekPc);
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287 //extern UINT32 mz80GetRegisterValue(void *, UINT32);
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289 static void OtherWrite8End(u32 a,u32 d,int realsize)
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292 if(a >= SRam.start && a <= SRam.end) {
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293 elprintf(EL_SRAMIO, "sram w8 [%06x] %02x @ %06x", a, d, SekPc);
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298 #ifdef _ASM_MEMORY_C
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299 // special ROM hardware (currently only banking and sram reg supported)
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300 if((a&0xfffff1) == 0xA130F1) {
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301 PicoWriteRomHW_SSF2(a, d); // SSF2 or SRAM
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305 // sram access register
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306 if(a == 0xA130F1) {
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307 elprintf(EL_SRAMIO, "sram reg=%02x", d);
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308 Pico.m.sram_reg &= ~3;
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309 Pico.m.sram_reg |= (u8)(d&3);
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313 elprintf(EL_UIO, "strange w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);
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315 // for games with simple protection devices, discovered by Haze
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317 Pico.m.prot_bytes[(a>>2)&1] = (u8)d;
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320 #include "MemoryCmn.c"
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323 // -----------------------------------------------------------------
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324 // Read Rom and read Ram
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326 #ifndef _ASM_MEMORY_C
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327 PICO_INTERNAL_ASM u32 PicoRead8(u32 a)
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331 if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram
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335 #ifndef EMU_CORE_DEBUG
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337 if (a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg&5)) {
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339 elprintf(EL_SRAMIO, "sram r8 [%06x] %02x @ %06x", a, d, SekPc);
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344 if (a<Pico.romsize) { d = *(u8 *)(Pico.rom+(a^1)); goto end; } // Rom
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346 if ((a&0xff4000)==0xa00000) { d=z80Read8(a); goto end; } // Z80 Ram
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348 if ((a&0xe700e0)==0xc00000) // VDP
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349 d=PicoVideoRead(a);
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350 else d=OtherRead16(a&~1, 8);
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351 if ((a&1)==0) d>>=8;
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354 elprintf(EL_IO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc);
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355 #ifdef EMU_CORE_DEBUG
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356 if (a>=Pico.romsize) {
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358 lastread_d[lrp_cyc++&15] = (u8)d;
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364 PICO_INTERNAL_ASM u32 PicoRead16(u32 a)
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368 if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram
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372 #ifndef EMU_CORE_DEBUG
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374 if (a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg&5)) {
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376 elprintf(EL_SRAMIO, "sram r16 [%06x] %04x @ %06x", a, d, SekPc);
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381 if (a<Pico.romsize) { d = *(u16 *)(Pico.rom+a); goto end; } // Rom
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384 if ((a&0xe700e0)==0xc00000)
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385 d = PicoVideoRead(a);
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386 else d = OtherRead16(a, 16);
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389 elprintf(EL_IO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc);
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390 #ifdef EMU_CORE_DEBUG
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391 if (a>=Pico.romsize) {
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393 lastread_d[lrp_cyc++&15] = d;
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399 PICO_INTERNAL_ASM u32 PicoRead32(u32 a)
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403 if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram
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408 if(a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg&5)) {
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409 d = (SRAMRead16(a)<<16)|SRAMRead16(a+2);
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410 elprintf(EL_SRAMIO, "sram r32 [%06x] %08x @ %06x", a, d, SekPc);
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414 if (a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+a); d = (pm[0]<<16)|pm[1]; goto end; } // Rom
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417 if ((a&0xe700e0)==0xc00000)
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418 d = (PicoVideoRead(a)<<16)|PicoVideoRead(a+2);
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419 else d = (OtherRead16(a, 32)<<16)|OtherRead16(a+2, 32);
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422 elprintf(EL_IO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);
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423 #ifdef EMU_CORE_DEBUG
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424 if (a>=Pico.romsize) {
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426 lastread_d[lrp_cyc++&15] = d;
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433 // -----------------------------------------------------------------
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436 #if !defined(_ASM_MEMORY_C) || defined(_ASM_MEMORY_C_AMIPS)
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437 PICO_INTERNAL_ASM void PicoWrite8(u32 a,u8 d)
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439 elprintf(EL_IO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc);
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440 #ifdef EMU_CORE_DEBUG
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441 lastwrite_cyc_d[lwp_cyc++&15] = d;
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444 if ((a&0xe00000)==0xe00000) { *(u8 *)(Pico.ram+((a^1)&0xffff))=d; return; } // Ram
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452 void PicoWrite16(u32 a,u16 d)
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454 elprintf(EL_IO, "w16: %06x, %04x", a&0xffffff, d);
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455 #ifdef EMU_CORE_DEBUG
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456 lastwrite_cyc_d[lwp_cyc++&15] = d;
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459 if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram
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463 if ((a&0xe700e0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; } // VDP
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467 static void PicoWrite32(u32 a,u32 d)
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469 elprintf(EL_IO, "w32: %06x, %08x", a&0xffffff, d);
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470 #ifdef EMU_CORE_DEBUG
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471 lastwrite_cyc_d[lwp_cyc++&15] = d;
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474 if ((a&0xe00000)==0xe00000)
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477 u16 *pm=(u16 *)(Pico.ram+(a&0xfffe));
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478 pm[0]=(u16)(d>>16); pm[1]=(u16)d;
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484 if ((a&0xe700e0)==0xc00000)
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487 PicoVideoWrite(a, (u16)(d>>16));
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488 PicoVideoWrite(a+2,(u16)d);
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492 OtherWrite16(a, (u16)(d>>16));
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493 OtherWrite16(a+2,(u16)d);
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497 // -----------------------------------------------------------------
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499 static void OtherWrite16End(u32 a,u32 d,int realsize)
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501 PicoWrite8Hook(a, d>>8, realsize);
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502 PicoWrite8Hook(a+1,d&0xff, realsize);
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505 u32 (*PicoRead16Hook) (u32 a, int realsize) = OtherRead16End;
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506 void (*PicoWrite8Hook) (u32 a, u32 d, int realsize) = OtherWrite8End;
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507 void (*PicoWrite16Hook)(u32 a, u32 d, int realsize) = OtherWrite16End;
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509 PICO_INTERNAL void PicoMemResetHooks(void)
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511 // default unmapped/cart specific handlers
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512 PicoRead16Hook = OtherRead16End;
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513 PicoWrite8Hook = OtherWrite8End;
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514 PicoWrite16Hook = OtherWrite16End;
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518 static void m68k_mem_setup(void);
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521 PICO_INTERNAL void PicoMemSetup(void)
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523 // Setup memory callbacks:
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525 PicoCpuCM68k.checkpc=PicoCheckPc;
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526 PicoCpuCM68k.fetch8 =PicoCpuCM68k.read8 =PicoRead8;
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527 PicoCpuCM68k.fetch16=PicoCpuCM68k.read16=PicoRead16;
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528 PicoCpuCM68k.fetch32=PicoCpuCM68k.read32=PicoRead32;
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529 PicoCpuCM68k.write8 =PicoWrite8;
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530 PicoCpuCM68k.write16=PicoWrite16;
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531 PicoCpuCM68k.write32=PicoWrite32;
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534 PicoCpuFM68k.read_byte =PicoRead8;
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535 PicoCpuFM68k.read_word =PicoRead16;
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536 PicoCpuFM68k.read_long =PicoRead32;
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537 PicoCpuFM68k.write_byte=PicoWrite8;
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538 PicoCpuFM68k.write_word=PicoWrite16;
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539 PicoCpuFM68k.write_long=PicoWrite32;
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541 // setup FAME fetchmap
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544 // by default, point everything to first 64k of ROM
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545 for (i = 0; i < M68K_FETCHBANK1; i++)
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546 PicoCpuFM68k.Fetch[i] = (unsigned int)Pico.rom - (i<<(24-FAMEC_FETCHBITS));
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548 for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < Pico.romsize; i++)
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549 PicoCpuFM68k.Fetch[i] = (unsigned int)Pico.rom;
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551 for (i = M68K_FETCHBANK1*14/16; i < M68K_FETCHBANK1; i++)
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552 PicoCpuFM68k.Fetch[i] = (unsigned int)Pico.ram - (i<<(24-FAMEC_FETCHBITS));
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560 /* some nasty things below :( */
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562 unsigned int (*pm68k_read_memory_8) (unsigned int address) = NULL;
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563 unsigned int (*pm68k_read_memory_16)(unsigned int address) = NULL;
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564 unsigned int (*pm68k_read_memory_32)(unsigned int address) = NULL;
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565 void (*pm68k_write_memory_8) (unsigned int address, unsigned char value) = NULL;
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566 void (*pm68k_write_memory_16)(unsigned int address, unsigned short value) = NULL;
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567 void (*pm68k_write_memory_32)(unsigned int address, unsigned int value) = NULL;
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568 unsigned int (*pm68k_read_memory_pcr_8) (unsigned int address) = NULL;
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569 unsigned int (*pm68k_read_memory_pcr_16)(unsigned int address) = NULL;
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570 unsigned int (*pm68k_read_memory_pcr_32)(unsigned int address) = NULL;
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572 // these are here for core debugging mode
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573 static unsigned int m68k_read_8 (unsigned int a, int do_fake)
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576 if(a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k) return *(u8 *)(Pico.rom+(a^1)); // Rom
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577 #ifdef EMU_CORE_DEBUG
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578 if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];
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580 return pm68k_read_memory_pcr_8(a);
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582 static unsigned int m68k_read_16(unsigned int a, int do_fake)
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585 if(a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k) return *(u16 *)(Pico.rom+(a&~1)); // Rom
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586 #ifdef EMU_CORE_DEBUG
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587 if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];
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589 return pm68k_read_memory_pcr_16(a);
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591 static unsigned int m68k_read_32(unsigned int a, int do_fake)
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594 if(a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k) { u16 *pm=(u16 *)(Pico.rom+(a&~1)); return (pm[0]<<16)|pm[1]; }
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595 #ifdef EMU_CORE_DEBUG
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596 if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];
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598 return pm68k_read_memory_pcr_32(a);
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601 unsigned int m68k_read_pcrelative_8 (unsigned int a) { return m68k_read_8 (a, 1); }
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602 unsigned int m68k_read_pcrelative_16(unsigned int a) { return m68k_read_16(a, 1); }
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603 unsigned int m68k_read_pcrelative_32(unsigned int a) { return m68k_read_32(a, 1); }
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604 unsigned int m68k_read_immediate_16(unsigned int a) { return m68k_read_16(a, 0); }
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605 unsigned int m68k_read_immediate_32(unsigned int a) { return m68k_read_32(a, 0); }
\r
606 unsigned int m68k_read_disassembler_8 (unsigned int a) { return m68k_read_8 (a, 0); }
\r
607 unsigned int m68k_read_disassembler_16(unsigned int a) { return m68k_read_16(a, 0); }
\r
608 unsigned int m68k_read_disassembler_32(unsigned int a) { return m68k_read_32(a, 0); }
\r
610 static unsigned int m68k_read_memory_pcr_8(unsigned int a)
\r
612 if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram
\r
616 static unsigned int m68k_read_memory_pcr_16(unsigned int a)
\r
618 if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram
\r
622 static unsigned int m68k_read_memory_pcr_32(unsigned int a)
\r
624 if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram
\r
628 #ifdef EMU_CORE_DEBUG
\r
630 unsigned int m68k_read_memory_8(unsigned int a)
\r
633 if (a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k)
\r
634 d = *(u8 *) (Pico.rom+(a^1));
\r
635 else d = (u8) lastread_d[lrp_mus++&15];
\r
636 elprintf(EL_IO, "r8_mu : %06x, %02x @%06x", a&0xffffff, d, SekPc);
\r
639 unsigned int m68k_read_memory_16(unsigned int a)
\r
642 if (a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k)
\r
643 d = *(u16 *)(Pico.rom+(a&~1));
\r
644 else d = (u16) lastread_d[lrp_mus++&15];
\r
645 elprintf(EL_IO, "r16_mu: %06x, %04x @%06x", a&0xffffff, d, SekPc);
\r
648 unsigned int m68k_read_memory_32(unsigned int a)
\r
651 if (a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k)
\r
652 { u16 *pm=(u16 *)(Pico.rom+(a&~1));d=(pm[0]<<16)|pm[1]; }
\r
653 else if (a <= 0x78) d = m68k_read_32(a, 0);
\r
654 else d = lastread_d[lrp_mus++&15];
\r
655 elprintf(EL_IO, "r32_mu: %06x, %08x @%06x", a&0xffffff, d, SekPc);
\r
659 // ignore writes, Cyclone already done that
\r
660 void m68k_write_memory_8(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }
\r
661 void m68k_write_memory_16(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }
\r
662 void m68k_write_memory_32(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }
\r
664 #else // if !EMU_CORE_DEBUG
\r
666 /* it appears that Musashi doesn't always mask the unused bits */
\r
667 unsigned int m68k_read_memory_8 (unsigned int address) { return pm68k_read_memory_8 (address) & 0xff; }
\r
668 unsigned int m68k_read_memory_16(unsigned int address) { return pm68k_read_memory_16(address) & 0xffff; }
\r
669 unsigned int m68k_read_memory_32(unsigned int address) { return pm68k_read_memory_32(address); }
\r
670 void m68k_write_memory_8 (unsigned int address, unsigned int value) { pm68k_write_memory_8 (address, (u8)value); }
\r
671 void m68k_write_memory_16(unsigned int address, unsigned int value) { pm68k_write_memory_16(address,(u16)value); }
\r
672 void m68k_write_memory_32(unsigned int address, unsigned int value) { pm68k_write_memory_32(address, value); }
\r
673 #endif // !EMU_CORE_DEBUG
\r
675 static void m68k_mem_setup(void)
\r
677 pm68k_read_memory_8 = PicoRead8;
\r
678 pm68k_read_memory_16 = PicoRead16;
\r
679 pm68k_read_memory_32 = PicoRead32;
\r
680 pm68k_write_memory_8 = PicoWrite8;
\r
681 pm68k_write_memory_16 = PicoWrite16;
\r
682 pm68k_write_memory_32 = PicoWrite32;
\r
683 pm68k_read_memory_pcr_8 = m68k_read_memory_pcr_8;
\r
684 pm68k_read_memory_pcr_16 = m68k_read_memory_pcr_16;
\r
685 pm68k_read_memory_pcr_32 = m68k_read_memory_pcr_32;
\r
690 // -----------------------------------------------------------------
\r
692 extern const unsigned short vcounts[];
\r
694 static int get_scanline(int is_from_z80)
\r
697 int cycles = z80_cyclesDone();
\r
698 while (cycles - z80_scanline_cycles >= 228)
\r
699 z80_scanline++, z80_scanline_cycles += 228;
\r
700 return z80_scanline;
\r
703 if (Pico.m.scanline != -1)
\r
704 return Pico.m.scanline;
\r
706 return vcounts[SekCyclesDone()>>8];
\r
709 /* probably not should be in this file, but it's near related code here */
\r
710 void ym2612_sync_timers(int z80_cycles, int mode_old, int mode_new)
\r
712 int xcycles = z80_cycles << 8;
\r
714 /* check for overflows */
\r
715 if ((mode_old & 4) && xcycles > timer_a_next_oflow)
\r
716 ym2612.OPN.ST.status |= 1;
\r
718 if ((mode_old & 8) && xcycles > timer_b_next_oflow)
\r
719 ym2612.OPN.ST.status |= 2;
\r
721 /* update timer a */
\r
723 while (xcycles >= timer_a_next_oflow)
\r
724 timer_a_next_oflow += timer_a_step;
\r
726 if ((mode_old ^ mode_new) & 1) // turning on/off
\r
728 if (mode_old & 1) {
\r
729 timer_a_offset = timer_a_next_oflow - xcycles;
\r
730 timer_a_next_oflow = 0x70000000;
\r
733 timer_a_next_oflow = xcycles + timer_a_offset;
\r
736 elprintf(EL_YMTIMER, "timer a upd to %i @ %i", timer_a_next_oflow>>8, z80_cycles);
\r
738 /* update timer b */
\r
740 while (xcycles >= timer_b_next_oflow)
\r
741 timer_b_next_oflow += timer_b_step;
\r
743 if ((mode_old ^ mode_new) & 2)
\r
745 if (mode_old & 2) {
\r
746 timer_b_offset = timer_b_next_oflow - xcycles;
\r
747 timer_b_next_oflow = 0x70000000;
\r
750 timer_b_next_oflow = xcycles + timer_b_offset;
\r
753 elprintf(EL_YMTIMER, "timer b upd to %i @ %i", timer_b_next_oflow>>8, z80_cycles);
\r
756 // ym2612 DAC and timer I/O handlers for z80
\r
757 int ym2612_write_local(u32 a, u32 d, int is_from_z80)
\r
762 if (a == 1 && ym2612.OPN.ST.address == 0x2a) /* DAC data */
\r
764 int scanline = get_scanline(is_from_z80);
\r
765 //elprintf(EL_STATUS, "%03i -> %03i dac w %08x z80 %i", PsndDacLine, scanline, d, is_from_z80);
\r
766 ym2612.dacout = ((int)d - 0x80) << 6;
\r
767 if (PsndOut && ym2612.dacen && scanline >= PsndDacLine)
\r
768 PsndDoDAC(scanline);
\r
774 case 0: /* address port 0 */
\r
775 ym2612.OPN.ST.address = d;
\r
776 ym2612.addr_A1 = 0;
\r
778 if (PicoOpt & POPT_EXT_FM) YM2612Write_940(a, d, -1);
\r
782 case 1: /* data port 0 */
\r
783 if (ym2612.addr_A1 != 0)
\r
786 addr = ym2612.OPN.ST.address;
\r
787 ym2612.REGS[addr] = d;
\r
791 case 0x24: // timer A High 8
\r
792 case 0x25: { // timer A Low 2
\r
793 int TAnew = (addr == 0x24) ? ((ym2612.OPN.ST.TA & 0x03)|(((int)d)<<2))
\r
794 : ((ym2612.OPN.ST.TA & 0x3fc)|(d&3));
\r
795 if (ym2612.OPN.ST.TA != TAnew)
\r
797 //elprintf(EL_STATUS, "timer a set %i", TAnew);
\r
798 ym2612.OPN.ST.TA = TAnew;
\r
799 ym2612.OPN.ST.TAC = (1024-TAnew)*18;
\r
800 //ym2612.OPN.ST.TAT = 0;
\r
802 timer_a_step = timer_a_offset = 16466 * (1024 - TAnew);
\r
803 if (ym2612.OPN.ST.mode & 1) {
\r
804 int cycles = is_from_z80 ? z80_cyclesDone() : cycles_68k_to_z80(SekCyclesDone());
\r
805 timer_a_next_oflow = (cycles << 8) + timer_a_step;
\r
807 elprintf(EL_YMTIMER, "timer a set to %i, %i", 1024 - TAnew, timer_a_next_oflow>>8);
\r
811 case 0x26: // timer B
\r
812 if (ym2612.OPN.ST.TB != d) {
\r
813 //elprintf(EL_STATUS, "timer b set %i", d);
\r
814 ym2612.OPN.ST.TB = d;
\r
815 ym2612.OPN.ST.TBC = (256-d) * 288;
\r
816 //ym2612.OPN.ST.TBT = 0;
\r
817 timer_b_step = timer_b_offset = 262800 * (256 - d); // 262881
\r
818 if (ym2612.OPN.ST.mode & 2) {
\r
819 int cycles = is_from_z80 ? z80_cyclesDone() : cycles_68k_to_z80(SekCyclesDone());
\r
820 timer_b_next_oflow = (cycles << 8) + timer_b_step;
\r
822 elprintf(EL_YMTIMER, "timer b set to %i, %i", 256 - d, timer_b_next_oflow>>8);
\r
825 case 0x27: { /* mode, timer control */
\r
826 int old_mode = ym2612.OPN.ST.mode;
\r
827 int cycles = is_from_z80 ? z80_cyclesDone() : cycles_68k_to_z80(SekCyclesDone());
\r
828 ym2612.OPN.ST.mode = d;
\r
830 elprintf(EL_YMTIMER, "st mode %02x", d);
\r
831 ym2612_sync_timers(cycles, old_mode, d);
\r
833 /* reset Timer a flag */
\r
835 ym2612.OPN.ST.status &= ~1;
\r
837 /* reset Timer b flag */
\r
839 ym2612.OPN.ST.status &= ~2;
\r
841 if ((d ^ old_mode) & 0xc0) {
\r
843 if (PicoOpt & POPT_EXT_FM) YM2612Write_940(a, d, get_scanline(is_from_z80));
\r
849 case 0x2b: { /* DAC Sel (YM2612) */
\r
850 int scanline = get_scanline(is_from_z80);
\r
851 ym2612.dacen = d & 0x80;
\r
852 if (d & 0x80) PsndDacLine = scanline;
\r
854 if (PicoOpt & POPT_EXT_FM) YM2612Write_940(a, d, scanline);
\r
861 case 2: /* address port 1 */
\r
862 ym2612.OPN.ST.address = d;
\r
863 ym2612.addr_A1 = 1;
\r
865 if (PicoOpt & POPT_EXT_FM) YM2612Write_940(a, d, -1);
\r
869 case 3: /* data port 1 */
\r
870 if (ym2612.addr_A1 != 1)
\r
873 addr = ym2612.OPN.ST.address | 0x100;
\r
874 ym2612.REGS[addr] = d;
\r
879 if (PicoOpt & POPT_EXT_FM)
\r
880 return YM2612Write_940(a, d, get_scanline(is_from_z80));
\r
882 return YM2612Write_(a, d);
\r
886 #define ym2612_read_local() \
\r
887 if (xcycles >= timer_a_next_oflow) \
\r
888 ym2612.OPN.ST.status |= (ym2612.OPN.ST.mode >> 2) & 1; \
\r
889 if (xcycles >= timer_b_next_oflow) \
\r
890 ym2612.OPN.ST.status |= (ym2612.OPN.ST.mode >> 2) & 2
\r
892 u32 ym2612_read_local_z80(void)
\r
894 int xcycles = z80_cyclesDone() << 8;
\r
896 ym2612_read_local();
\r
898 elprintf(EL_YMTIMER, "timer z80 read %i, sched %i, %i @ %i|%i", ym2612.OPN.ST.status,
\r
899 timer_a_next_oflow>>8, timer_b_next_oflow>>8, xcycles >> 8, (xcycles >> 8) / 228);
\r
900 return ym2612.OPN.ST.status;
\r
903 u32 ym2612_read_local_68k(void)
\r
905 int xcycles = cycles_68k_to_z80(SekCyclesDone()) << 8;
\r
907 ym2612_read_local();
\r
909 elprintf(EL_YMTIMER, "timer 68k read %i, sched %i, %i @ %i|%i", ym2612.OPN.ST.status,
\r
910 timer_a_next_oflow>>8, timer_b_next_oflow>>8, xcycles >> 8, (xcycles >> 8) / 228);
\r
911 return ym2612.OPN.ST.status;
\r
914 void ym2612_pack_state(void)
\r
918 if (PicoOpt & POPT_EXT_FM)
\r
919 /*YM2612PicoStateSave2_940(0, 0)*/;
\r
922 YM2612PicoStateSave2(0, 0);
\r
925 void ym2612_unpack_state(void)
\r
927 int i, ret, tat, tbt;
\r
928 YM2612PicoStateLoad();
\r
930 // feed all the registers and update internal state
\r
931 for (i = 0x20; i < 0xB8; i++) {
\r
932 ym2612_write_local(0, i, 0);
\r
933 ym2612_write_local(1, ym2612.REGS[i], 0);
\r
935 for (i = 0x30; i < 0xB8; i++) {
\r
936 ym2612_write_local(2, i, 0);
\r
937 ym2612_write_local(3, ym2612.REGS[i|0x100], 0);
\r
941 if (PicoOpt & POPT_EXT_FM)
\r
942 /*ret = YM2612PicoStateLoad2_940(&tat, &tbt)*/;
\r
945 ret = YM2612PicoStateLoad2(&tat, &tbt);
\r
948 // -----------------------------------------------------------------
\r
951 PICO_INTERNAL unsigned char z80_read(unsigned short a)
\r
955 if ((a>>13)==2) // 0x4000-0x5fff (Charles MacDonald)
\r
957 if (PicoOpt&POPT_EN_FM) ret = ym2612_read_local_z80();
\r
963 extern u32 PicoReadM68k8(u32 a);
\r
965 addr68k=Pico.m.z80_bank68k<<15;
\r
968 if (addr68k < Pico.romsize) { ret = Pico.rom[addr68k^1]; goto bnkend; }
\r
969 elprintf(EL_ANOMALY, "z80->68k upper read [%06x] %02x", addr68k, ret);
\r
970 if (PicoAHW & PAHW_MCD)
\r
971 ret = PicoReadM68k8(addr68k);
\r
972 else ret = PicoRead8(addr68k);
\r
974 elprintf(EL_Z80BNK, "z80->68k r8 [%06x] %02x", addr68k, ret);
\r
978 // should not be needed, cores should be able to access RAM themselves
\r
979 if (a<0x4000) return Pico.zram[a&0x1fff];
\r
981 elprintf(EL_ANOMALY, "z80 invalid r8 [%06x] %02x", a, ret);
\r
986 PICO_INTERNAL_ASM void z80_write(unsigned char data, unsigned short a)
\r
988 PICO_INTERNAL_ASM void z80_write(unsigned int a, unsigned char data)
\r
991 if ((a>>13)==2) // 0x4000-0x5fff (Charles MacDonald)
\r
993 if(PicoOpt&POPT_EN_FM) emustatus|=ym2612_write_local(a, data, 1) & 1;
\r
997 if ((a&0xfff9)==0x7f11) // 7f11 7f13 7f15 7f17
\r
999 if(PicoOpt&POPT_EN_PSG) SN76496Write(data);
\r
1005 Pico.m.z80_bank68k>>=1;
\r
1006 Pico.m.z80_bank68k|=(data&1)<<8;
\r
1007 Pico.m.z80_bank68k&=0x1ff; // 9 bits and filled in the new top one
\r
1013 extern void PicoWriteM68k8(u32 a,u8 d);
\r
1015 addr68k=Pico.m.z80_bank68k<<15;
\r
1016 addr68k+=a&0x7fff;
\r
1017 elprintf(EL_Z80BNK, "z80->68k w8 [%06x] %02x", addr68k, data);
\r
1018 if (PicoAHW & PAHW_MCD)
\r
1019 PicoWriteM68k8(addr68k, data);
\r
1020 else PicoWrite8(addr68k, data);
\r
1024 // should not be needed
\r
1025 if (a<0x4000) { Pico.zram[a&0x1fff]=data; return; }
\r
1027 elprintf(EL_ANOMALY, "z80 invalid w8 [%06x] %02x", a, data);
\r
1031 PICO_INTERNAL unsigned short z80_read16(unsigned short a)
\r
1033 return (u16) ( (u16)z80_read(a) | ((u16)z80_read((u16)(a+1))<<8) );
\r
1036 PICO_INTERNAL void z80_write16(unsigned short data, unsigned short a)
\r
1038 z80_write((unsigned char) data,a);
\r
1039 z80_write((unsigned char)(data>>8),(u16)(a+1));
\r