| 1 | \r |
| 2 | // This file is part of the PicoDrive Megadrive Emulator\r |
| 3 | \r |
| 4 | // Copyright (c) 2011 FinalDave (emudave (at) gmail.com)\r |
| 5 | \r |
| 6 | // This code is licensed under the GNU General Public License version 2.0 and the MAME License.\r |
| 7 | // You can choose the license that has the most advantages for you.\r |
| 8 | \r |
| 9 | // SVN repository can be found at http://code.google.com/p/cyclone68000/\r |
| 10 | \r |
| 11 | #include "PicoInt.h"\r |
| 12 | \r |
| 13 | int (*PicoAcb)(struct PicoArea *)=NULL; // Area callback for each block of memory\r |
| 14 | FILE *PmovFile=NULL;\r |
| 15 | int PmovAction=0;\r |
| 16 | \r |
| 17 | // Scan one variable and callback\r |
| 18 | static void ScanVar(void *data,int len,char *name)\r |
| 19 | {\r |
| 20 | struct PicoArea pa={NULL,0,NULL};\r |
| 21 | pa.data=data; pa.len=len; pa.name=name;\r |
| 22 | if (PicoAcb) PicoAcb(&pa);\r |
| 23 | }\r |
| 24 | \r |
| 25 | #define SCAN_VAR(x,y) ScanVar(&x,sizeof(x),y);\r |
| 26 | #define SCANP(x) ScanVar(&Pico.x,sizeof(Pico.x),#x);\r |
| 27 | \r |
| 28 | // Pack the cpu into a common format:\r |
| 29 | static int PackCpu(unsigned char *cpu)\r |
| 30 | {\r |
| 31 | unsigned int pc=0;\r |
| 32 | \r |
| 33 | #ifdef EMU_A68K\r |
| 34 | memcpy(cpu,M68000_regs.d,0x40);\r |
| 35 | pc=M68000_regs.pc;\r |
| 36 | *(unsigned char *)(cpu+0x44)=(unsigned char)M68000_regs.ccr;\r |
| 37 | *(unsigned char *)(cpu+0x45)=(unsigned char)M68000_regs.srh;\r |
| 38 | *(unsigned int *)(cpu+0x48)=M68000_regs.isp;\r |
| 39 | #endif\r |
| 40 | \r |
| 41 | #ifdef EMU_C68K\r |
| 42 | memcpy(cpu,PicoCpu.d,0x40);\r |
| 43 | pc=PicoCpu.pc-PicoCpu.membase;\r |
| 44 | *(unsigned char *)(cpu+0x44)=PicoCpu.ccr;\r |
| 45 | *(unsigned char *)(cpu+0x45)=PicoCpu.srh;\r |
| 46 | *(unsigned int *)(cpu+0x48)=PicoCpu.osp;\r |
| 47 | #endif\r |
| 48 | \r |
| 49 | *(unsigned int *)(cpu+0x40)=pc;\r |
| 50 | return 0;\r |
| 51 | }\r |
| 52 | \r |
| 53 | static int UnpackCpu(unsigned char *cpu)\r |
| 54 | {\r |
| 55 | unsigned int pc=0;\r |
| 56 | \r |
| 57 | pc=*(unsigned int *)(cpu+0x40);\r |
| 58 | \r |
| 59 | #ifdef EMU_A68K\r |
| 60 | memcpy(M68000_regs.d,cpu,0x40);\r |
| 61 | M68000_regs.pc=pc;\r |
| 62 | M68000_regs.ccr=*(unsigned char *)(cpu+0x44);\r |
| 63 | M68000_regs.srh=*(unsigned char *)(cpu+0x45);\r |
| 64 | M68000_regs.isp=*(unsigned int *)(cpu+0x48);\r |
| 65 | #endif\r |
| 66 | \r |
| 67 | #ifdef EMU_C68K\r |
| 68 | memcpy(PicoCpu.d,cpu,0x40);\r |
| 69 | PicoCpu.membase=0;\r |
| 70 | PicoCpu.pc =PicoCpu.checkpc(pc); // Base pc\r |
| 71 | PicoCpu.ccr=*(unsigned char *)(cpu+0x44);\r |
| 72 | PicoCpu.srh=*(unsigned char *)(cpu+0x45);\r |
| 73 | PicoCpu.osp=*(unsigned int *)(cpu+0x48);\r |
| 74 | #endif\r |
| 75 | return 0;\r |
| 76 | }\r |
| 77 | \r |
| 78 | // Scan the contents of the virtual machine's memory for saving or loading\r |
| 79 | int PicoAreaScan(int action,int *pmin)\r |
| 80 | {\r |
| 81 | unsigned char cpu[0x60];\r |
| 82 | \r |
| 83 | memset(&cpu,0,sizeof(cpu));\r |
| 84 | \r |
| 85 | if (action&4)\r |
| 86 | {\r |
| 87 | // Scan all the memory areas:\r |
| 88 | SCANP(ram) SCANP(vram) SCANP(zram) SCANP(cram) SCANP(vsram)\r |
| 89 | \r |
| 90 | // Pack, scan and unpack the cpu data:\r |
| 91 | PackCpu(cpu);\r |
| 92 | SekInit();\r |
| 93 | PicoMemInit();\r |
| 94 | SCAN_VAR(cpu,"cpu")\r |
| 95 | UnpackCpu(cpu);\r |
| 96 | \r |
| 97 | SCAN_VAR(Pico.m ,"misc")\r |
| 98 | SCAN_VAR(Pico.video,"video")\r |
| 99 | SCAN_VAR(Pico.s ,"sound")\r |
| 100 | \r |
| 101 | Pico.m.scanline=0;\r |
| 102 | if (action&2)\r |
| 103 | {\r |
| 104 | memset(Pico.highpal,0,sizeof(Pico.highpal));\r |
| 105 | Pico.m.dirtyPal=1; // Recalculate palette\r |
| 106 | }\r |
| 107 | }\r |
| 108 | \r |
| 109 | if (pmin) *pmin=0x0021;\r |
| 110 | \r |
| 111 | return 0;\r |
| 112 | }\r |
| 113 | \r |
| 114 | // ---------------------------------------------------------------------------\r |
| 115 | // Helper code to save/load to a file handle\r |
| 116 | \r |
| 117 | // Area callback for each piece of Megadrive memory, read or write to the file:\r |
| 118 | static int StateAcb(struct PicoArea *pa)\r |
| 119 | {\r |
| 120 | if (PmovFile==NULL) return 1;\r |
| 121 | \r |
| 122 | if ((PmovAction&3)==1) fwrite(pa->data,1,pa->len,PmovFile);\r |
| 123 | if ((PmovAction&3)==2) fread (pa->data,1,pa->len,PmovFile);\r |
| 124 | return 0;\r |
| 125 | }\r |
| 126 | \r |
| 127 | // Save or load the state from PmovFile:\r |
| 128 | int PmovState()\r |
| 129 | {\r |
| 130 | int minimum=0;\r |
| 131 | unsigned char head[32];\r |
| 132 | \r |
| 133 | memset(head,0,sizeof(head));\r |
| 134 | \r |
| 135 | // Find out minial compatible version:\r |
| 136 | PicoAreaScan(PmovAction&0xc,&minimum); \r |
| 137 | \r |
| 138 | memcpy(head,"Pico",4);\r |
| 139 | *(unsigned int *)(head+0x8)=PicoVer;\r |
| 140 | *(unsigned int *)(head+0xc)=minimum;\r |
| 141 | \r |
| 142 | // Scan header:\r |
| 143 | if (PmovAction&1) fwrite(head,1,sizeof(head),PmovFile);\r |
| 144 | if (PmovAction&2) fread (head,1,sizeof(head),PmovFile);\r |
| 145 | \r |
| 146 | // Scan memory areas:\r |
| 147 | PicoAcb=StateAcb;\r |
| 148 | PicoAreaScan(PmovAction,NULL);\r |
| 149 | PicoAcb=NULL;\r |
| 150 | return 0;\r |
| 151 | }\r |
| 152 | \r |
| 153 | int PmovUpdate()\r |
| 154 | {\r |
| 155 | int ret=0;\r |
| 156 | if (PmovFile==NULL) return 1;\r |
| 157 | \r |
| 158 | if ((PmovAction&3)==0) return 0;\r |
| 159 | \r |
| 160 | PicoPad[1]=0; // Make sure pad #2 is blank\r |
| 161 | if (PmovAction&1) ret=fwrite(PicoPad,1,2,PmovFile);\r |
| 162 | if (PmovAction&2) ret=fread (PicoPad,1,2,PmovFile);\r |
| 163 | \r |
| 164 | if (ret!=2)\r |
| 165 | {\r |
| 166 | // End of file\r |
| 167 | fclose(PmovFile); PmovFile=NULL;\r |
| 168 | PmovAction=0;\r |
| 169 | }\r |
| 170 | \r |
| 171 | return 0;\r |
| 172 | }\r |