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1 | // Savestate handling for emulated Sega/Mega CD machine. |
2 | // (c) Copyright 2007, Grazvydas "notaz" Ignotas |
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3 | |
4 | |
5 | #include "../PicoInt.h" |
6 | |
7 | // ym2612 |
8 | #include "../sound/ym2612.h" |
9 | |
10 | // sn76496 |
11 | extern int *sn76496_regs; |
12 | |
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13 | void (*PicoStateProgressCB)(const char *str) = 0; |
14 | |
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15 | |
16 | typedef enum { |
17 | CHUNK_M68K = 1, |
18 | CHUNK_RAM, |
19 | CHUNK_VRAM, |
20 | CHUNK_ZRAM, |
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21 | CHUNK_CRAM, // 5 |
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22 | CHUNK_VSRAM, |
23 | CHUNK_MISC, |
24 | CHUNK_VIDEO, |
25 | CHUNK_Z80, |
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26 | CHUNK_PSG, // 10 |
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27 | CHUNK_FM, |
28 | // CD stuff |
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29 | CHUNK_S68K, |
30 | CHUNK_PRG_RAM, |
31 | CHUNK_WORD_RAM, |
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32 | CHUNK_PCM_RAM, // 15 |
33 | CHUNK_BRAM, |
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34 | CHUNK_GA_REGS, |
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35 | CHUNK_PCM, |
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36 | CHUNK_CDC, |
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37 | CHUNK_CDD, // 20 |
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38 | CHUNK_SCD, |
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39 | CHUNK_RC, |
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40 | CHUNK_MISC_CD, |
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41 | } chunk_name_e; |
42 | |
43 | |
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44 | static char *chunk_names[] = { |
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45 | "INVALID!", |
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46 | "Saving.. M68K state", |
47 | "Saving.. RAM", |
48 | "Saving.. VRAM", |
49 | "Saving.. ZRAM", |
50 | "Saving.. CRAM", // 5 |
51 | "Saving.. VSRAM", |
52 | "Saving.. emu state", |
53 | "Saving.. VIDEO", |
54 | "Saving.. Z80 state", |
55 | "Saving.. PSG", // 10 |
56 | "Saving.. FM", |
57 | // CD stuff |
58 | "Saving.. S68K state", |
59 | "Saving.. PRG_RAM", |
60 | "Saving.. WORD_RAM", |
61 | "Saving.. PCM_RAM", // 15 |
62 | "Saving.. BRAM", |
63 | "Saving.. GATE ARRAY regs", |
64 | "Saving.. PCM state", |
65 | "Saving.. CDC", |
66 | "Saving.. CDD", // 20 |
67 | "Saving.. SCD", |
68 | "Saving.. GFX chip", |
69 | "Saving.. MCD state", |
70 | }; |
71 | |
72 | |
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73 | static int write_chunk(chunk_name_e name, int len, void *data, void *file) |
74 | { |
75 | size_t bwritten = 0; |
76 | bwritten += areaWrite(&name, 1, 1, file); |
77 | bwritten += areaWrite(&len, 1, 4, file); |
78 | bwritten += areaWrite(data, 1, len, file); |
79 | |
80 | return (bwritten == len + 4 + 1); |
81 | } |
82 | |
83 | |
84 | #define CHECKED_WRITE(name,len,data) \ |
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85 | if (PicoStateProgressCB) PicoStateProgressCB(chunk_names[name]); \ |
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86 | if (!write_chunk(name, len, data, file)) return 1; |
87 | |
88 | #define CHECKED_WRITE_BUFF(name,buff) \ |
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89 | if (PicoStateProgressCB) PicoStateProgressCB(chunk_names[name]); \ |
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90 | if (!write_chunk(name, sizeof(buff), &buff, file)) return 1; |
91 | |
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92 | PICO_INTERNAL int PicoCdSaveState(void *file) |
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93 | { |
94 | unsigned char buff[0x60]; |
95 | void *ym2612_regs = YM2612GetRegs(); |
96 | |
97 | areaWrite("PicoSMCD", 1, 8, file); |
98 | areaWrite(&PicoVer, 1, 4, file); |
99 | |
100 | memset(buff, 0, sizeof(buff)); |
101 | PicoAreaPackCpu(buff, 0); |
102 | CHECKED_WRITE_BUFF(CHUNK_M68K, buff); |
103 | CHECKED_WRITE_BUFF(CHUNK_RAM, Pico.ram); |
104 | CHECKED_WRITE_BUFF(CHUNK_VRAM, Pico.vram); |
105 | CHECKED_WRITE_BUFF(CHUNK_ZRAM, Pico.zram); |
106 | CHECKED_WRITE_BUFF(CHUNK_CRAM, Pico.cram); |
107 | CHECKED_WRITE_BUFF(CHUNK_VSRAM, Pico.vsram); |
108 | CHECKED_WRITE_BUFF(CHUNK_MISC, Pico.m); |
109 | CHECKED_WRITE_BUFF(CHUNK_VIDEO, Pico.video); |
110 | if(PicoOpt&7) { |
111 | memset(buff, 0, sizeof(buff)); |
112 | z80_pack(buff); |
113 | CHECKED_WRITE_BUFF(CHUNK_Z80, buff); |
114 | } |
115 | if(PicoOpt&3) |
116 | CHECKED_WRITE(CHUNK_PSG, 28*4, sn76496_regs); |
117 | if(PicoOpt&1) |
118 | CHECKED_WRITE(CHUNK_FM, 0x200+4, ym2612_regs); |
119 | |
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120 | if (PicoMCD & 1) |
121 | { |
122 | Pico_mcd->m.audio_offset = mp3_get_offset(); |
123 | memset(buff, 0, sizeof(buff)); |
124 | PicoAreaPackCpu(buff, 1); |
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125 | if (Pico_mcd->s68k_regs[3]&4) // 1M mode? |
126 | wram_1M_to_2M(Pico_mcd->word_ram2M); |
127 | Pico_mcd->m.hint_vector = *(unsigned short *)(Pico_mcd->bios + 0x72); |
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128 | |
129 | CHECKED_WRITE_BUFF(CHUNK_S68K, buff); |
130 | CHECKED_WRITE_BUFF(CHUNK_PRG_RAM, Pico_mcd->prg_ram); |
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131 | CHECKED_WRITE_BUFF(CHUNK_WORD_RAM, Pico_mcd->word_ram2M); // in 2M format |
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132 | CHECKED_WRITE_BUFF(CHUNK_PCM_RAM, Pico_mcd->pcm_ram); |
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133 | CHECKED_WRITE_BUFF(CHUNK_BRAM, Pico_mcd->bram); |
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134 | CHECKED_WRITE_BUFF(CHUNK_GA_REGS, Pico_mcd->s68k_regs); // GA regs, not CPU regs |
135 | CHECKED_WRITE_BUFF(CHUNK_PCM, Pico_mcd->pcm); |
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136 | CHECKED_WRITE_BUFF(CHUNK_CDD, Pico_mcd->cdd); |
137 | CHECKED_WRITE_BUFF(CHUNK_CDC, Pico_mcd->cdc); |
138 | CHECKED_WRITE_BUFF(CHUNK_SCD, Pico_mcd->scd); |
139 | CHECKED_WRITE_BUFF(CHUNK_RC, Pico_mcd->rot_comp); |
140 | CHECKED_WRITE_BUFF(CHUNK_MISC_CD, Pico_mcd->m); |
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141 | |
142 | if (Pico_mcd->s68k_regs[3]&4) // convert back |
143 | wram_2M_to_1M(Pico_mcd->word_ram2M); |
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144 | } |
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145 | |
146 | return 0; |
147 | } |
148 | |
149 | static int g_read_offs = 0; |
150 | |
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151 | #define R_ERROR_RETURN(error) \ |
152 | { \ |
153 | printf("PicoCdLoadState @ %x: " error "\n", g_read_offs); \ |
154 | return 1; \ |
155 | } |
156 | |
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157 | // when is eof really set? |
158 | #define CHECKED_READ(len,data) \ |
159 | if (areaRead(data, 1, len, file) != len) { \ |
160 | if (len == 1 && areaEof(file)) return 0; \ |
161 | R_ERROR_RETURN("areaRead: premature EOF\n"); \ |
162 | return 1; \ |
163 | } \ |
164 | g_read_offs += len; |
165 | |
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166 | #define CHECKED_READ2(len2,data) \ |
167 | if (len2 != len) R_ERROR_RETURN("unexpected len, wanted " #len2); \ |
168 | CHECKED_READ(len2, data) |
169 | |
170 | #define CHECKED_READ_BUFF(buff) CHECKED_READ2(sizeof(buff), &buff); |
171 | |
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172 | PICO_INTERNAL int PicoCdLoadState(void *file) |
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173 | { |
174 | unsigned char buff[0x60]; |
175 | int ver, len; |
176 | void *ym2612_regs = YM2612GetRegs(); |
177 | |
178 | g_read_offs = 0; |
179 | CHECKED_READ(8, buff); |
180 | if (strncmp((char *)buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header"); |
181 | CHECKED_READ(4, &ver); |
182 | |
183 | while (!areaEof(file)) |
184 | { |
185 | CHECKED_READ(1, buff); |
186 | CHECKED_READ(4, &len); |
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187 | if (len < 0 || len > 1024*512) R_ERROR_RETURN("bad length"); |
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188 | if (buff[0] > CHUNK_FM && !(PicoMCD & 1)) R_ERROR_RETURN("cd chunk in non CD state?"); |
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189 | |
190 | switch (buff[0]) |
191 | { |
192 | case CHUNK_M68K: |
193 | CHECKED_READ_BUFF(buff); |
194 | PicoAreaUnpackCpu(buff, 0); |
195 | break; |
196 | |
197 | case CHUNK_Z80: |
198 | CHECKED_READ_BUFF(buff); |
199 | z80_unpack(buff); |
200 | break; |
201 | |
202 | case CHUNK_RAM: CHECKED_READ_BUFF(Pico.ram); break; |
203 | case CHUNK_VRAM: CHECKED_READ_BUFF(Pico.vram); break; |
204 | case CHUNK_ZRAM: CHECKED_READ_BUFF(Pico.zram); break; |
205 | case CHUNK_CRAM: CHECKED_READ_BUFF(Pico.cram); break; |
206 | case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); break; |
207 | case CHUNK_MISC: CHECKED_READ_BUFF(Pico.m); break; |
208 | case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); break; |
209 | case CHUNK_PSG: CHECKED_READ2(28*4, sn76496_regs); break; |
210 | case CHUNK_FM: |
211 | CHECKED_READ2(0x200+4, ym2612_regs); |
212 | YM2612PicoStateLoad(); |
213 | break; |
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214 | |
215 | // cd stuff |
216 | case CHUNK_S68K: |
217 | CHECKED_READ_BUFF(buff); |
218 | PicoAreaUnpackCpu(buff, 1); |
219 | break; |
220 | |
221 | case CHUNK_PRG_RAM: CHECKED_READ_BUFF(Pico_mcd->prg_ram); break; |
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222 | case CHUNK_WORD_RAM: CHECKED_READ_BUFF(Pico_mcd->word_ram2M); break; |
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223 | case CHUNK_PCM_RAM: CHECKED_READ_BUFF(Pico_mcd->pcm_ram); break; |
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224 | case CHUNK_BRAM: CHECKED_READ_BUFF(Pico_mcd->bram); break; |
225 | case CHUNK_GA_REGS: CHECKED_READ_BUFF(Pico_mcd->s68k_regs); break; |
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226 | case CHUNK_PCM: CHECKED_READ_BUFF(Pico_mcd->pcm); break; |
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227 | case CHUNK_CDD: CHECKED_READ_BUFF(Pico_mcd->cdd); break; |
228 | case CHUNK_CDC: CHECKED_READ_BUFF(Pico_mcd->cdc); break; |
229 | case CHUNK_SCD: CHECKED_READ_BUFF(Pico_mcd->scd); break; |
230 | case CHUNK_RC: CHECKED_READ_BUFF(Pico_mcd->rot_comp); break; |
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231 | case CHUNK_MISC_CD: CHECKED_READ_BUFF(Pico_mcd->m); break; |
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232 | |
233 | default: |
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234 | printf("PicoCdLoadState: skipping unknown chunk %i of size %i\n", buff[0], len); |
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235 | areaSeek(file, len, SEEK_CUR); |
236 | break; |
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237 | } |
238 | } |
239 | |
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240 | /* after load events */ |
241 | if (Pico_mcd->s68k_regs[3]&4) // 1M mode? |
242 | wram_2M_to_1M(Pico_mcd->word_ram2M); |
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243 | PicoMemResetCD(Pico_mcd->s68k_regs[3]); |
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244 | #ifdef _ASM_CD_MEMORY_C |
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245 | if (Pico_mcd->s68k_regs[3]&4) |
246 | PicoMemResetCDdecode(Pico_mcd->s68k_regs[3]); |
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247 | #endif |
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248 | if (Pico_mcd->m.audio_track > 0 && Pico_mcd->m.audio_track < Pico_mcd->TOC.Last_Track) |
249 | mp3_start_play(Pico_mcd->TOC.Tracks[Pico_mcd->m.audio_track].F, Pico_mcd->m.audio_offset); |
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250 | // restore hint vector |
251 | *(unsigned short *)(Pico_mcd->bios + 0x72) = Pico_mcd->m.hint_vector; |
252 | |
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253 | return 0; |
254 | } |
255 | |
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256 | |
257 | int PicoCdLoadStateGfx(void *file) |
258 | { |
259 | int ver, len, found = 0; |
260 | char buff[8]; |
261 | |
262 | g_read_offs = 0; |
263 | CHECKED_READ(8, buff); |
264 | if (strncmp(buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header"); |
265 | CHECKED_READ(4, &ver); |
266 | |
267 | while (!areaEof(file) && found < 4) |
268 | { |
269 | CHECKED_READ(1, buff); |
270 | CHECKED_READ(4, &len); |
271 | if (len < 0 || len > 1024*512) R_ERROR_RETURN("bad length"); |
272 | if (buff[0] > CHUNK_FM && !(PicoMCD & 1)) R_ERROR_RETURN("cd chunk in non CD state?"); |
273 | |
274 | switch (buff[0]) |
275 | { |
276 | case CHUNK_VRAM: CHECKED_READ_BUFF(Pico.vram); found++; break; |
277 | case CHUNK_CRAM: CHECKED_READ_BUFF(Pico.cram); found++; break; |
278 | case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); found++; break; |
279 | case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); found++; break; |
280 | default: |
281 | areaSeek(file, len, SEEK_CUR); |
282 | break; |
283 | } |
284 | } |
285 | |
286 | return 0; |
287 | } |
288 | |
289 | |