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1 | // This is part of Pico Library\r |
2 | \r |
3 | // (c) Copyright 2004 Dave, All rights reserved.\r |
4 | // (c) Copyright 2006 notaz, All rights reserved.\r |
5 | // Free for non-commercial use.\r |
6 | \r |
7 | // For commercial use, separate licencing terms must be obtained.\r |
8 | \r |
9 | \r |
efcba75f |
10 | #include "pico_int.h"\r |
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11 | #include <zlib/zlib.h>\r |
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12 | \r |
13 | // ym2612\r |
14 | #include "sound/ym2612.h"\r |
15 | \r |
16 | // sn76496\r |
17 | extern int *sn76496_regs;\r |
18 | \r |
19 | \r |
20 | struct PicoArea { void *data; int len; char *name; };\r |
21 | \r |
22 | // strange observation on Symbian OS 9.1, m600 organizer fw r3a06:\r |
23 | // taking an address of fread or fwrite causes "application could't be started" error\r |
24 | // on startup randomly depending on binary layout of executable file.\r |
25 | \r |
860c6322 |
26 | arearw *areaRead = (arearw *) 0; // fread; // read and write function pointers for\r |
27 | arearw *areaWrite = (arearw *) 0; // fwrite; // gzip save state ability\r |
28 | areaeof *areaEof = (areaeof *) 0;\r |
29 | areaseek *areaSeek = (areaseek *) 0;\r |
30 | areaclose *areaClose = (areaclose *) 0;\r |
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31 | \r |
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32 | void (*PicoLoadStateHook)(void) = NULL;\r |
33 | \r |
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34 | \r |
35 | // Scan one variable and callback\r |
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36 | static int ScanVar(void *data,int len,char *name,void *PmovFile,int is_write)\r |
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37 | {\r |
38 | int ret = 0;\r |
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39 | if (is_write)\r |
40 | ret = areaWrite(data,1,len,PmovFile);\r |
41 | else\r |
42 | ret = areaRead (data,1,len,PmovFile);\r |
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43 | return (ret != len);\r |
44 | }\r |
45 | \r |
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46 | #define SCAN_VAR(x,y) ScanVar(&x,sizeof(x),y,PmovFile,is_write);\r |
47 | #define SCANP(x) ScanVar(&Pico.x,sizeof(Pico.x),#x,PmovFile,is_write);\r |
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48 | \r |
49 | // Pack the cpu into a common format:\r |
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50 | PICO_INTERNAL void PicoAreaPackCpu(unsigned char *cpu, int is_sub)\r |
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51 | {\r |
52 | unsigned int pc=0;\r |
53 | \r |
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54 | #if defined(EMU_C68K)\r |
55 | struct Cyclone *context = is_sub ? &PicoCpuCS68k : &PicoCpuCM68k;\r |
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56 | memcpy(cpu,context->d,0x40);\r |
57 | pc=context->pc-context->membase;\r |
58 | *(unsigned int *)(cpu+0x44)=CycloneGetSr(context);\r |
59 | *(unsigned int *)(cpu+0x48)=context->osp;\r |
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60 | cpu[0x4c] = context->irq;\r |
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61 | cpu[0x4d] = context->state_flags & 1;\r |
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62 | #elif defined(EMU_M68K)\r |
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63 | void *oldcontext = m68ki_cpu_p;\r |
3aa1e148 |
64 | m68k_set_context(is_sub ? &PicoCpuMS68k : &PicoCpuMM68k);\r |
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65 | memcpy(cpu,m68ki_cpu_p->dar,0x40);\r |
66 | pc=m68ki_cpu_p->pc;\r |
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67 | *(unsigned int *)(cpu+0x44)=m68k_get_reg(NULL, M68K_REG_SR);\r |
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68 | *(unsigned int *)(cpu+0x48)=m68ki_cpu_p->sp[m68ki_cpu_p->s_flag^SFLAG_SET];\r |
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69 | cpu[0x4c] = CPU_INT_LEVEL>>8;\r |
70 | cpu[0x4d] = CPU_STOPPED;\r |
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71 | m68k_set_context(oldcontext);\r |
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72 | #elif defined(EMU_F68K)\r |
73 | M68K_CONTEXT *context = is_sub ? &PicoCpuFS68k : &PicoCpuFM68k;\r |
74 | memcpy(cpu,context->dreg,0x40);\r |
75 | pc=context->pc;\r |
76 | *(unsigned int *)(cpu+0x44)=context->sr;\r |
77 | *(unsigned int *)(cpu+0x48)=context->asp;\r |
78 | cpu[0x4c] = context->interrupts[0];\r |
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79 | cpu[0x4d] = (context->execinfo & FM68K_HALTED) ? 1 : 0;\r |
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80 | #endif\r |
81 | \r |
82 | *(unsigned int *)(cpu+0x40)=pc;\r |
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83 | }\r |
84 | \r |
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85 | PICO_INTERNAL void PicoAreaUnpackCpu(unsigned char *cpu, int is_sub)\r |
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86 | {\r |
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87 | #if defined(EMU_C68K)\r |
88 | struct Cyclone *context = is_sub ? &PicoCpuCS68k : &PicoCpuCM68k;\r |
89 | CycloneSetSr(context, *(unsigned int *)(cpu+0x44));\r |
90 | context->osp=*(unsigned int *)(cpu+0x48);\r |
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91 | memcpy(context->d,cpu,0x40);\r |
92 | context->membase=0;\r |
93 | context->pc = context->checkpc(*(unsigned int *)(cpu+0x40)); // Base pc\r |
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94 | context->irq = cpu[0x4c];\r |
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95 | context->state_flags = 0;\r |
96 | if (cpu[0x4d])\r |
97 | context->state_flags |= 1;\r |
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98 | #elif defined(EMU_M68K)\r |
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99 | void *oldcontext = m68ki_cpu_p;\r |
3aa1e148 |
100 | m68k_set_context(is_sub ? &PicoCpuMS68k : &PicoCpuMM68k);\r |
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101 | m68k_set_reg(M68K_REG_SR, *(unsigned int *)(cpu+0x44));\r |
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102 | memcpy(m68ki_cpu_p->dar,cpu,0x40);\r |
103 | m68ki_cpu_p->pc=*(unsigned int *)(cpu+0x40);\r |
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104 | m68ki_cpu_p->sp[m68ki_cpu_p->s_flag^SFLAG_SET]=*(unsigned int *)(cpu+0x48);\r |
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105 | CPU_INT_LEVEL = cpu[0x4c] << 8;\r |
106 | CPU_STOPPED = cpu[0x4d];\r |
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107 | m68k_set_context(oldcontext);\r |
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108 | #elif defined(EMU_F68K)\r |
109 | M68K_CONTEXT *context = is_sub ? &PicoCpuFS68k : &PicoCpuFM68k;\r |
110 | memcpy(context->dreg,cpu,0x40);\r |
111 | context->pc =*(unsigned int *)(cpu+0x40);\r |
112 | context->sr =*(unsigned int *)(cpu+0x44);\r |
113 | context->asp=*(unsigned int *)(cpu+0x48);\r |
114 | context->interrupts[0] = cpu[0x4c];\r |
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115 | context->execinfo &= ~FM68K_HALTED;\r |
116 | if (cpu[0x4d]&1) context->execinfo |= FM68K_HALTED;\r |
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117 | #endif\r |
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118 | }\r |
119 | \r |
120 | // Scan the contents of the virtual machine's memory for saving or loading\r |
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121 | static int PicoAreaScan(int is_write, unsigned int ver, void *PmovFile)\r |
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122 | {\r |
123 | void *ym2612_regs;\r |
124 | unsigned char cpu[0x60];\r |
125 | unsigned char cpu_z80[0x60];\r |
126 | int ret;\r |
127 | \r |
128 | memset(&cpu,0,sizeof(cpu));\r |
129 | memset(&cpu_z80,0,sizeof(cpu_z80));\r |
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130 | Pico.m.scanline=0;\r |
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131 | \r |
132 | ym2612_regs = YM2612GetRegs();\r |
133 | \r |
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134 | // Scan all the memory areas:\r |
135 | SCANP(ram) SCANP(vram) SCANP(zram) SCANP(cram) SCANP(vsram)\r |
136 | \r |
137 | // Pack, scan and unpack the cpu data:\r |
138 | if (is_write)\r |
139 | PicoAreaPackCpu(cpu, 0);\r |
140 | SCAN_VAR(cpu,"cpu")\r |
141 | if (!is_write)\r |
142 | PicoAreaUnpackCpu(cpu, 0);\r |
143 | \r |
144 | SCAN_VAR(Pico.m ,"misc")\r |
145 | SCAN_VAR(Pico.video,"video")\r |
146 | \r |
147 | if (is_write)\r |
148 | z80_pack(cpu_z80);\r |
149 | ret = SCAN_VAR(cpu_z80,"cpu_z80")\r |
150 | // do not unpack if we fail to load z80 state\r |
151 | if (!is_write) {\r |
152 | if (ret) z80_reset();\r |
153 | else z80_unpack(cpu_z80);\r |
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154 | }\r |
155 | \r |
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156 | ScanVar(sn76496_regs, 28*4, "SN76496state", PmovFile, is_write);\r |
157 | if (is_write)\r |
158 | ym2612_pack_state();\r |
159 | ret = ScanVar(ym2612_regs, 0x200+4, "YM2612state", PmovFile, is_write); // regs + addr line\r |
160 | if (!is_write && !ret)\r |
161 | ym2612_unpack_state();\r |
162 | \r |
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163 | return 0;\r |
164 | }\r |
165 | \r |
166 | // ---------------------------------------------------------------------------\r |
167 | // Helper code to save/load to a file handle\r |
168 | \r |
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169 | // XXX: error checking\r |
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170 | // Save or load the state from PmovFile:\r |
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171 | static int PmovState(int is_write, void *PmovFile)\r |
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172 | {\r |
173 | int minimum=0;\r |
174 | unsigned char head[32];\r |
175 | \r |
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176 | if ((PicoAHW & PAHW_MCD) || carthw_chunks != NULL)\r |
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177 | {\r |
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178 | if (is_write)\r |
179 | return PicoCdSaveState(PmovFile);\r |
180 | else {\r |
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181 | int ret = PicoCdLoadState(PmovFile);\r |
182 | if (PicoLoadStateHook) PicoLoadStateHook();\r |
183 | return ret;\r |
184 | }\r |
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185 | }\r |
186 | \r |
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187 | memset(head,0,sizeof(head));\r |
188 | \r |
189 | // Find out minimal compatible version:\r |
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190 | minimum = 0x0021;\r |
191 | \r |
192 | memcpy(head,"Pico",4);\r |
193 | *(unsigned int *)(head+0x8)=PicoVer;\r |
194 | *(unsigned int *)(head+0xc)=minimum;\r |
195 | \r |
196 | // Scan header:\r |
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197 | if (is_write)\r |
198 | areaWrite(head,1,sizeof(head),PmovFile);\r |
199 | else\r |
200 | areaRead (head,1,sizeof(head),PmovFile);\r |
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201 | \r |
202 | // Scan memory areas:\r |
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203 | PicoAreaScan(is_write, *(unsigned int *)(head+0x8), PmovFile);\r |
204 | \r |
205 | if (!is_write && PicoLoadStateHook)\r |
206 | PicoLoadStateHook();\r |
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207 | \r |
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208 | return 0;\r |
209 | }\r |
210 | \r |
211 | static size_t gzRead2(void *p, size_t _size, size_t _n, void *file)\r |
212 | {\r |
213 | return gzread(file, p, _n);\r |
214 | }\r |
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215 | \r |
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216 | static size_t gzWrite2(void *p, size_t _size, size_t _n, void *file)\r |
217 | {\r |
218 | return gzwrite(file, p, _n);\r |
219 | }\r |
220 | \r |
221 | static void set_cbs(int gz)\r |
222 | {\r |
223 | if (gz) {\r |
224 | areaRead = gzRead2;\r |
225 | areaWrite = gzWrite2;\r |
226 | areaEof = (areaeof *) gzeof;\r |
227 | areaSeek = (areaseek *) gzseek;\r |
228 | areaClose = (areaclose *) gzclose;\r |
229 | } else {\r |
230 | areaRead = (arearw *) fread;\r |
231 | areaWrite = (arearw *) fwrite;\r |
232 | areaEof = (areaeof *) feof;\r |
233 | areaSeek = (areaseek *) fseek;\r |
234 | areaClose = (areaclose *) fclose;\r |
235 | }\r |
236 | }\r |
237 | \r |
238 | int PicoState(const char *fname, int is_save)\r |
239 | {\r |
240 | void *afile = NULL;\r |
241 | int ret;\r |
242 | \r |
243 | if (strcmp(fname + strlen(fname) - 3, ".gz") == 0)\r |
244 | {\r |
245 | if ( (afile = gzopen(fname, is_save ? "wb" : "rb")) ) {\r |
246 | set_cbs(1);\r |
247 | if (is_save)\r |
248 | gzsetparams(afile, 9, Z_DEFAULT_STRATEGY);\r |
249 | }\r |
250 | }\r |
251 | else\r |
252 | {\r |
253 | if ( (afile = fopen(fname, is_save ? "wb" : "rb")) ) {\r |
254 | set_cbs(0);\r |
255 | }\r |
256 | }\r |
257 | \r |
258 | if (afile == NULL)\r |
259 | return -1;\r |
260 | \r |
261 | ret = PmovState(is_save, afile);\r |
262 | areaClose(afile);\r |
263 | if (!is_save)\r |
264 | Pico.m.dirtyPal=1;\r |
265 | \r |
266 | return ret;\r |
267 | }\r |
268 | \r |
269 | int PicoStateLoadVDP(const char *fname)\r |
270 | {\r |
271 | void *afile = NULL;\r |
272 | if (strcmp(fname + strlen(fname) - 3, ".gz") == 0)\r |
273 | {\r |
274 | if ( (afile = gzopen(fname, "rb")) )\r |
275 | set_cbs(1);\r |
276 | }\r |
277 | else\r |
278 | {\r |
279 | if ( (afile = fopen(fname, "rb")) )\r |
280 | set_cbs(0);\r |
281 | }\r |
282 | if (afile == NULL)\r |
283 | return -1;\r |
284 | \r |
285 | if ((PicoAHW & PAHW_MCD) || carthw_chunks != NULL) {\r |
286 | PicoCdLoadStateGfx(afile);\r |
287 | } else {\r |
288 | areaSeek(afile, 0x10020, SEEK_SET); // skip header and RAM in state file\r |
289 | areaRead(Pico.vram, 1, sizeof(Pico.vram), afile);\r |
290 | areaSeek(afile, 0x2000, SEEK_CUR);\r |
291 | areaRead(Pico.cram, 1, sizeof(Pico.cram), afile);\r |
292 | areaRead(Pico.vsram, 1, sizeof(Pico.vsram), afile);\r |
293 | areaSeek(afile, 0x221a0, SEEK_SET);\r |
294 | areaRead(&Pico.video, 1, sizeof(Pico.video), afile);\r |
295 | }\r |
296 | areaClose(afile);\r |
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297 | return 0;\r |
298 | }\r |
299 | \r |