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 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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13 #include "sound/ym2612.h"
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16 extern int *sn76496_regs;
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19 struct PicoArea { void *data; int len; char *name; };
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21 // strange observation on Symbian OS 9.1, m600 organizer fw r3a06:
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22 // taking an address of fread or fwrite causes "application could't be started" error
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23 // on startup randomly depending on binary layout of executable file.
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25 arearw *areaRead = (arearw *) 0; // fread; // read and write function pointers for
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26 arearw *areaWrite = (arearw *) 0; // fwrite; // gzip save state ability
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27 areaeof *areaEof = (areaeof *) 0;
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28 areaseek *areaSeek = (areaseek *) 0;
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29 areaclose *areaClose = (areaclose *) 0;
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32 // Scan one variable and callback
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33 static int ScanVar(void *data,int len,char *name,void *PmovFile,int PmovAction)
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36 if ((PmovAction&3)==1) ret = areaWrite(data,1,len,PmovFile);
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37 if ((PmovAction&3)==2) ret = areaRead (data,1,len,PmovFile);
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38 return (ret != len);
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41 #define SCAN_VAR(x,y) ScanVar(&x,sizeof(x),y,PmovFile,PmovAction);
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42 #define SCANP(x) ScanVar(&Pico.x,sizeof(Pico.x),#x,PmovFile,PmovAction);
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44 // Pack the cpu into a common format:
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45 int PicoAreaPackCpu(unsigned char *cpu, int is_sub)
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50 memcpy(cpu,M68000_regs.d,0x40);
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52 *(unsigned char *)(cpu+0x44)=(unsigned char)M68000_regs.ccr;
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53 *(unsigned char *)(cpu+0x45)=(unsigned char)M68000_regs.srh;
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54 *(unsigned int *)(cpu+0x48)=M68000_regs.isp;
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55 cpu[0x4c] = M68000_regs.irq;
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60 struct Cyclone *context = is_sub ? &PicoCpuS68k : &PicoCpu;
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61 memcpy(cpu,context->d,0x40);
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62 pc=context->pc-context->membase;
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63 *(unsigned int *)(cpu+0x44)=CycloneGetSr(context);
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64 *(unsigned int *)(cpu+0x48)=context->osp;
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65 cpu[0x4c] = context->irq;
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66 cpu[0x4d] = context->stopped;
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70 void *oldcontext = m68ki_cpu_p;
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71 m68k_set_context(is_sub ? &PicoS68kCPU : &PicoM68kCPU);
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72 memcpy(cpu,m68ki_cpu_p->dar,0x40);
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74 *(unsigned int *)(cpu+0x44)=m68k_get_reg(NULL, M68K_REG_SR);
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75 *(unsigned int *)(cpu+0x48)=m68ki_cpu_p->sp[0];
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76 cpu[0x4c] = CPU_INT_LEVEL>>8;
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77 cpu[0x4d] = CPU_STOPPED;
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78 m68k_set_context(oldcontext);
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81 *(unsigned int *)(cpu+0x40)=pc;
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85 int PicoAreaUnpackCpu(unsigned char *cpu, int is_sub)
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88 memcpy(M68000_regs.d,cpu,0x40);
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90 M68000_regs.ccr=*(unsigned char *)(cpu+0x44);
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91 M68000_regs.srh=*(unsigned char *)(cpu+0x45);
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92 M68000_regs.isp=*(unsigned int *)(cpu+0x48);
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93 M68000_regs.irq = cpu[0x4c];
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98 struct Cyclone *context = is_sub ? &PicoCpuS68k : &PicoCpu;
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99 CycloneSetSr(context, *(unsigned int *)(cpu+0x44));
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100 context->osp=*(unsigned int *)(cpu+0x48);
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101 memcpy(context->d,cpu,0x40);
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102 context->membase=0;
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103 context->pc = context->checkpc(*(unsigned int *)(cpu+0x40)); // Base pc
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104 context->irq = cpu[0x4c];
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105 context->stopped = cpu[0x4d];
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109 void *oldcontext = m68ki_cpu_p;
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110 m68k_set_context(is_sub ? &PicoS68kCPU : &PicoM68kCPU);
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111 memcpy(m68ki_cpu_p->dar,cpu,0x40);
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112 m68ki_cpu_p->pc=*(unsigned int *)(cpu+0x40);
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113 m68k_set_reg(M68K_REG_SR, *(unsigned int *)(cpu+0x44));
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114 m68ki_cpu_p->sp[0]=*(unsigned int *)(cpu+0x48);
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115 CPU_INT_LEVEL = cpu[0x4c] << 8;
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116 CPU_STOPPED = cpu[0x4d];
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117 m68k_set_context(oldcontext);
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122 // Scan the contents of the virtual machine's memory for saving or loading
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123 static int PicoAreaScan(int PmovAction,unsigned int ver, void *PmovFile)
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126 unsigned char cpu[0x60];
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127 unsigned char cpu_z80[0x60];
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130 memset(&cpu,0,sizeof(cpu));
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131 memset(&cpu_z80,0,sizeof(cpu_z80));
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133 ym2612_regs = YM2612GetRegs();
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139 // Scan all the memory areas:
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140 SCANP(ram) SCANP(vram) SCANP(zram) SCANP(cram) SCANP(vsram)
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142 // Pack, scan and unpack the cpu data:
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143 if((PmovAction&3)==1) PicoAreaPackCpu(cpu, 0);
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144 //SekInit(); // notaz: do we really have to do this here?
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146 SCAN_VAR(cpu,"cpu")
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147 if((PmovAction&3)==2) PicoAreaUnpackCpu(cpu, 0);
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149 SCAN_VAR(Pico.m ,"misc")
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150 SCAN_VAR(Pico.video,"video")
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152 // notaz: save/load z80, YM2612, sn76496 states instead of Pico.s (which is unused anyway)
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154 if((PmovAction&3)==1) z80_pack(cpu_z80);
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155 ret = SCAN_VAR(cpu_z80,"cpu_z80")
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156 // do not unpack if we fail to load z80 state
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157 if((PmovAction&3)==2) {
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158 if(ret) z80_reset();
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159 else z80_unpack(cpu_z80);
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163 ScanVar(sn76496_regs,28*4,"SN76496state", PmovFile, PmovAction); // regs and other stuff
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165 ScanVar(ym2612_regs, 0x200+4, "YM2612state", PmovFile, PmovAction); // regs + addr line
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166 if((PmovAction&3)==2) YM2612PicoStateLoad(); // reload YM2612 state from it's regs
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173 // ---------------------------------------------------------------------------
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174 // Helper code to save/load to a file handle
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176 // Save or load the state from PmovFile:
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177 int PmovState(int PmovAction, void *PmovFile)
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180 unsigned char head[32];
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184 if (PmovAction&1) return PicoCdSaveState(PmovFile);
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185 if (PmovAction&2) return PicoCdLoadState(PmovFile);
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188 memset(head,0,sizeof(head));
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190 // Find out minimal compatible version:
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191 //PicoAreaScan(PmovAction&0xc,&minimum);
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194 memcpy(head,"Pico",4);
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195 *(unsigned int *)(head+0x8)=PicoVer;
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196 *(unsigned int *)(head+0xc)=minimum;
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199 if (PmovAction&1) areaWrite(head,1,sizeof(head),PmovFile);
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200 if (PmovAction&2) areaRead (head,1,sizeof(head),PmovFile);
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202 // Scan memory areas:
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203 PicoAreaScan(PmovAction, *(unsigned int *)(head+0x8), PmovFile);
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