--- /dev/null
+// This is part of Pico Library\r
+\r
+// (c) Copyright 2004 Dave, All rights reserved.\r
+// (c) Copyright 2006 notaz, All rights reserved.\r
+// Free for non-commercial use.\r
+\r
+// For commercial use, separate licencing terms must be obtained.\r
+\r
+\r
+#include "pico_int.h"\r
+\r
+// ym2612\r
+#include "sound/ym2612.h"\r
+\r
+// sn76496\r
+extern int *sn76496_regs;\r
+\r
+\r
+struct PicoArea { void *data; int len; char *name; };\r
+\r
+// strange observation on Symbian OS 9.1, m600 organizer fw r3a06:\r
+// taking an address of fread or fwrite causes "application could't be started" error\r
+// on startup randomly depending on binary layout of executable file.\r
+\r
+arearw *areaRead = (arearw *) 0; // fread; // read and write function pointers for\r
+arearw *areaWrite = (arearw *) 0; // fwrite; // gzip save state ability\r
+areaeof *areaEof = (areaeof *) 0;\r
+areaseek *areaSeek = (areaseek *) 0;\r
+areaclose *areaClose = (areaclose *) 0;\r
+\r
+void (*PicoLoadStateHook)(void) = NULL;\r
+\r
+\r
+// Scan one variable and callback\r
+static int ScanVar(void *data,int len,char *name,void *PmovFile,int PmovAction)\r
+{\r
+ int ret = 0;\r
+ if ((PmovAction&3)==1) ret = areaWrite(data,1,len,PmovFile);\r
+ if ((PmovAction&3)==2) ret = areaRead (data,1,len,PmovFile);\r
+ return (ret != len);\r
+}\r
+\r
+#define SCAN_VAR(x,y) ScanVar(&x,sizeof(x),y,PmovFile,PmovAction);\r
+#define SCANP(x) ScanVar(&Pico.x,sizeof(Pico.x),#x,PmovFile,PmovAction);\r
+\r
+// Pack the cpu into a common format:\r
+PICO_INTERNAL void PicoAreaPackCpu(unsigned char *cpu, int is_sub)\r
+{\r
+ unsigned int pc=0;\r
+\r
+#if defined(EMU_C68K)\r
+ struct Cyclone *context = is_sub ? &PicoCpuCS68k : &PicoCpuCM68k;\r
+ memcpy(cpu,context->d,0x40);\r
+ pc=context->pc-context->membase;\r
+ *(unsigned int *)(cpu+0x44)=CycloneGetSr(context);\r
+ *(unsigned int *)(cpu+0x48)=context->osp;\r
+ cpu[0x4c] = context->irq;\r
+ cpu[0x4d] = context->state_flags & 1;\r
+#elif defined(EMU_M68K)\r
+ void *oldcontext = m68ki_cpu_p;\r
+ m68k_set_context(is_sub ? &PicoCpuMS68k : &PicoCpuMM68k);\r
+ memcpy(cpu,m68ki_cpu_p->dar,0x40);\r
+ pc=m68ki_cpu_p->pc;\r
+ *(unsigned int *)(cpu+0x44)=m68k_get_reg(NULL, M68K_REG_SR);\r
+ *(unsigned int *)(cpu+0x48)=m68ki_cpu_p->sp[m68ki_cpu_p->s_flag^SFLAG_SET];\r
+ cpu[0x4c] = CPU_INT_LEVEL>>8;\r
+ cpu[0x4d] = CPU_STOPPED;\r
+ m68k_set_context(oldcontext);\r
+#elif defined(EMU_F68K)\r
+ M68K_CONTEXT *context = is_sub ? &PicoCpuFS68k : &PicoCpuFM68k;\r
+ memcpy(cpu,context->dreg,0x40);\r
+ pc=context->pc;\r
+ *(unsigned int *)(cpu+0x44)=context->sr;\r
+ *(unsigned int *)(cpu+0x48)=context->asp;\r
+ cpu[0x4c] = context->interrupts[0];\r
+ cpu[0x4d] = (context->execinfo & FM68K_HALTED) ? 1 : 0;\r
+#endif\r
+\r
+ *(unsigned int *)(cpu+0x40)=pc;\r
+}\r
+\r
+PICO_INTERNAL void PicoAreaUnpackCpu(unsigned char *cpu, int is_sub)\r
+{\r
+#if defined(EMU_C68K)\r
+ struct Cyclone *context = is_sub ? &PicoCpuCS68k : &PicoCpuCM68k;\r
+ CycloneSetSr(context, *(unsigned int *)(cpu+0x44));\r
+ context->osp=*(unsigned int *)(cpu+0x48);\r
+ memcpy(context->d,cpu,0x40);\r
+ context->membase=0;\r
+ context->pc = context->checkpc(*(unsigned int *)(cpu+0x40)); // Base pc\r
+ context->irq = cpu[0x4c];\r
+ context->state_flags = 0;\r
+ if (cpu[0x4d])\r
+ context->state_flags |= 1;\r
+#elif defined(EMU_M68K)\r
+ void *oldcontext = m68ki_cpu_p;\r
+ m68k_set_context(is_sub ? &PicoCpuMS68k : &PicoCpuMM68k);\r
+ m68k_set_reg(M68K_REG_SR, *(unsigned int *)(cpu+0x44));\r
+ memcpy(m68ki_cpu_p->dar,cpu,0x40);\r
+ m68ki_cpu_p->pc=*(unsigned int *)(cpu+0x40);\r
+ m68ki_cpu_p->sp[m68ki_cpu_p->s_flag^SFLAG_SET]=*(unsigned int *)(cpu+0x48);\r
+ CPU_INT_LEVEL = cpu[0x4c] << 8;\r
+ CPU_STOPPED = cpu[0x4d];\r
+ m68k_set_context(oldcontext);\r
+#elif defined(EMU_F68K)\r
+ M68K_CONTEXT *context = is_sub ? &PicoCpuFS68k : &PicoCpuFM68k;\r
+ memcpy(context->dreg,cpu,0x40);\r
+ context->pc =*(unsigned int *)(cpu+0x40);\r
+ context->sr =*(unsigned int *)(cpu+0x44);\r
+ context->asp=*(unsigned int *)(cpu+0x48);\r
+ context->interrupts[0] = cpu[0x4c];\r
+ context->execinfo &= ~FM68K_HALTED;\r
+ if (cpu[0x4d]&1) context->execinfo |= FM68K_HALTED;\r
+#endif\r
+}\r
+\r
+// Scan the contents of the virtual machine's memory for saving or loading\r
+static int PicoAreaScan(int PmovAction,unsigned int ver, void *PmovFile)\r
+{\r
+ void *ym2612_regs;\r
+ unsigned char cpu[0x60];\r
+ unsigned char cpu_z80[0x60];\r
+ int ret;\r
+\r
+ memset(&cpu,0,sizeof(cpu));\r
+ memset(&cpu_z80,0,sizeof(cpu_z80));\r
+\r
+ ym2612_regs = YM2612GetRegs();\r
+\r
+ if (PmovAction&4)\r
+ {\r
+ Pico.m.scanline=0;\r
+\r
+ // Scan all the memory areas:\r
+ SCANP(ram) SCANP(vram) SCANP(zram) SCANP(cram) SCANP(vsram)\r
+\r
+ // Pack, scan and unpack the cpu data:\r
+ if((PmovAction&3)==1) PicoAreaPackCpu(cpu, 0);\r
+ //PicoMemInit();\r
+ SCAN_VAR(cpu,"cpu")\r
+ if((PmovAction&3)==2) PicoAreaUnpackCpu(cpu, 0);\r
+\r
+ SCAN_VAR(Pico.m ,"misc")\r
+ SCAN_VAR(Pico.video,"video")\r
+\r
+ if (PicoOpt&7) {\r
+ if((PmovAction&3)==1) z80_pack(cpu_z80);\r
+ ret = SCAN_VAR(cpu_z80,"cpu_z80")\r
+ // do not unpack if we fail to load z80 state\r
+ if((PmovAction&3)==2) {\r
+ if(ret) z80_reset();\r
+ else z80_unpack(cpu_z80);\r
+ }\r
+ }\r
+ if (PicoOpt&3)\r
+ ScanVar(sn76496_regs,28*4,"SN76496state", PmovFile, PmovAction); // regs and other stuff\r
+ if (PicoOpt&1) {\r
+ if((PmovAction&3)==1) ym2612_pack_state();\r
+ ScanVar(ym2612_regs, 0x200+4, "YM2612state", PmovFile, PmovAction); // regs + addr line\r
+ if((PmovAction&3)==2) ym2612_unpack_state(); // reload YM2612 state from it's regs\r
+ }\r
+ }\r
+\r
+ return 0;\r
+}\r
+\r
+// ---------------------------------------------------------------------------\r
+// Helper code to save/load to a file handle\r
+\r
+// Save or load the state from PmovFile:\r
+int PmovState(int PmovAction, void *PmovFile)\r
+{\r
+ int minimum=0;\r
+ unsigned char head[32];\r
+\r
+ if ((PicoAHW & PAHW_MCD) || carthw_chunks != NULL)\r
+ {\r
+ if (PmovAction&1) return PicoCdSaveState(PmovFile);\r
+ if (PmovAction&2) {\r
+ int ret = PicoCdLoadState(PmovFile);\r
+ if (PicoLoadStateHook) PicoLoadStateHook();\r
+ return ret;\r
+ }\r
+ }\r
+\r
+ memset(head,0,sizeof(head));\r
+\r
+ // Find out minimal compatible version:\r
+ //PicoAreaScan(PmovAction&0xc,&minimum);\r
+ minimum = 0x0021;\r
+\r
+ memcpy(head,"Pico",4);\r
+ *(unsigned int *)(head+0x8)=PicoVer;\r
+ *(unsigned int *)(head+0xc)=minimum;\r
+\r
+ // Scan header:\r
+ if (PmovAction&1) areaWrite(head,1,sizeof(head),PmovFile);\r
+ if (PmovAction&2) areaRead (head,1,sizeof(head),PmovFile);\r
+\r
+ // Scan memory areas:\r
+ PicoAreaScan(PmovAction, *(unsigned int *)(head+0x8), PmovFile);\r
+\r
+ if ((PmovAction&2) && PicoLoadStateHook) PicoLoadStateHook();\r
+\r
+ return 0;\r
+}\r
+\r
notaz.gp2x.de / picodrive.git / blobdiff