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1 | \r |
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2 | // This file is part of the PicoDrive Megadrive Emulator\r |
3 | \r |
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4 | // Copyright (c) 2011 FinalDave (emudave (at) gmail.com)\r |
5 | \r |
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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 |
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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 |