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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 |
10 | #include "PicoInt.h"\r |
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11 | #include "sound/ym2612.h"\r |
12 | \r |
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13 | int PicoVer=0x0133;\r |
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14 | struct Pico Pico;\r |
15 | int PicoOpt=0; // disable everything by default\r |
16 | int PicoSkipFrame=0; // skip rendering frame?\r |
17 | int PicoRegionOverride = 0; // override the region detection 0: Auto, 1: Japan NTSC, 2: Japan PAL, 4: US, 8: Europe\r |
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18 | int PicoAutoRgnOrder = 0;\r |
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19 | int emustatus = 0;\r |
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20 | void (*PicoWriteSound)(int len) = 0; // called once per frame at the best time to send sound buffer (PsndOut) to hardware\r |
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21 | \r |
22 | struct PicoSRAM SRam;\r |
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23 | int z80startCycle, z80stopCycle; // in 68k cycles\r |
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24 | //int z80ExtraCycles = 0;\r |
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25 | int PicoPad[2]; // Joypads, format is SACB RLDU\r |
26 | int PicoMCD = 0; // mega CD status: scd_started, reset_pending\r |
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27 | \r |
28 | // to be called once on emu init\r |
29 | int PicoInit(void)\r |
30 | {\r |
31 | // Blank space for state:\r |
32 | memset(&Pico,0,sizeof(Pico));\r |
33 | memset(&PicoPad,0,sizeof(PicoPad));\r |
34 | \r |
35 | // Init CPUs:\r |
36 | SekInit();\r |
37 | z80_init(); // init even if we aren't going to use it\r |
38 | \r |
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39 | PicoInitMCD();\r |
40 | \r |
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41 | SRam.data=0;\r |
42 | SRam.resize=1;\r |
43 | \r |
44 | return 0;\r |
45 | }\r |
46 | \r |
47 | // to be called once on emu exit\r |
48 | void PicoExit(void)\r |
49 | {\r |
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50 | if (PicoMCD&1)\r |
51 | PicoExitMCD();\r |
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52 | z80_exit();\r |
53 | \r |
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54 | if(SRam.data) free(SRam.data); SRam.data=0;\r |
55 | }\r |
56 | \r |
57 | int PicoReset(int hard)\r |
58 | {\r |
59 | unsigned int region=0;\r |
60 | int support=0,hw=0,i=0;\r |
61 | unsigned char pal=0;\r |
62 | \r |
63 | if (Pico.romsize<=0) return 1;\r |
64 | \r |
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65 | // setup correct memory map\r |
66 | if (PicoMCD & 1)\r |
67 | PicoMemSetupCD();\r |
68 | else PicoMemSetup();\r |
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69 | PicoMemReset();\r |
70 | SekReset();\r |
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71 | // s68k doesn't have the TAS quirk, so we just globally set normal TAS handler in MCD mode (used by Batman games).\r |
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72 | SekSetRealTAS(PicoMCD & 1);\r |
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73 | SekCycleCntT=0;\r |
74 | z80_reset();\r |
75 | \r |
76 | // reset VDP state, VRAM and PicoMisc\r |
77 | //memset(&Pico.video,0,sizeof(Pico.video));\r |
78 | //memset(&Pico.vram,0,sizeof(Pico.vram));\r |
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79 | memset(Pico.ioports,0,sizeof(Pico.ioports)); // needed for MCD to reset properly\r |
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80 | memset(&Pico.m,0,sizeof(Pico.m));\r |
81 | Pico.video.pending_ints=0;\r |
82 | emustatus = 0;\r |
83 | \r |
84 | if(hard) {\r |
85 | // clear all memory of the emulated machine\r |
86 | memset(&Pico.ram,0,(unsigned int)&Pico.rom-(unsigned int)&Pico.ram);\r |
87 | }\r |
88 | \r |
89 | // default VDP register values (based on Fusion)\r |
90 | Pico.video.reg[0] = Pico.video.reg[1] = 0x04;\r |
91 | Pico.video.reg[0xc] = 0x81;\r |
92 | Pico.video.reg[0xf] = 0x02;\r |
93 | Pico.m.dirtyPal = 1;\r |
94 | \r |
95 | if(PicoRegionOverride)\r |
96 | {\r |
97 | support = PicoRegionOverride;\r |
98 | }\r |
99 | else\r |
100 | {\r |
101 | // Read cartridge region data:\r |
102 | region=PicoRead32(0x1f0);\r |
103 | \r |
104 | for (i=0;i<4;i++)\r |
105 | {\r |
106 | int c=0;\r |
107 | \r |
108 | c=region>>(i<<3); c&=0xff;\r |
109 | if (c<=' ') continue;\r |
110 | \r |
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111 | if (c=='J') support|=1;\r |
112 | else if (c=='U') support|=4;\r |
113 | else if (c=='E') support|=8;\r |
114 | else if (c=='j') {support|=1; break; }\r |
115 | else if (c=='u') {support|=4; break; }\r |
116 | else if (c=='e') {support|=8; break; }\r |
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117 | else\r |
118 | {\r |
119 | // New style code:\r |
120 | char s[2]={0,0};\r |
121 | s[0]=(char)c;\r |
122 | support|=strtol(s,NULL,16);\r |
123 | }\r |
124 | }\r |
125 | }\r |
126 | \r |
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127 | // auto detection order override\r |
128 | if (PicoAutoRgnOrder) {\r |
129 | if (((PicoAutoRgnOrder>>0)&0xf) & support) support = (PicoAutoRgnOrder>>0)&0xf;\r |
130 | else if (((PicoAutoRgnOrder>>4)&0xf) & support) support = (PicoAutoRgnOrder>>4)&0xf;\r |
131 | else if (((PicoAutoRgnOrder>>8)&0xf) & support) support = (PicoAutoRgnOrder>>8)&0xf;\r |
132 | }\r |
133 | \r |
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134 | // Try to pick the best hardware value for English/50hz:\r |
135 | if (support&8) { hw=0xc0; pal=1; } // Europe\r |
136 | else if (support&4) hw=0x80; // USA\r |
137 | else if (support&2) { hw=0x40; pal=1; } // Japan PAL\r |
138 | else if (support&1) hw=0x00; // Japan NTSC\r |
139 | else hw=0x80; // USA\r |
140 | \r |
141 | Pico.m.hardware=(unsigned char)(hw|0x20); // No disk attached\r |
142 | Pico.m.pal=pal;\r |
143 | Pico.video.status = 0x3408 | pal; // always set bits | vblank | pal\r |
144 | \r |
145 | sound_reset(); // pal must be known here\r |
146 | \r |
147 | if (PicoMCD & 1) {\r |
148 | PicoResetMCD(hard);\r |
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149 | return 0;\r |
150 | }\r |
151 | \r |
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152 | if(SRam.resize) {\r |
153 | int sram_size = 0;\r |
154 | if(SRam.data) free(SRam.data); SRam.data=0;\r |
155 | Pico.m.sram_reg = 0;\r |
156 | \r |
157 | if(*(Pico.rom+0x1B1) == 'R' && *(Pico.rom+0x1B0) == 'A') {\r |
158 | if(*(Pico.rom+0x1B2) & 0x40) {\r |
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159 | // EEPROM\r |
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160 | // what kind of EEPROMs are actually used? X24C02? X24C04? (X24C01 has only 128), but we will support up to 8K\r |
161 | SRam.start = PicoRead32(0x1B4) & ~1; // zero address is used for clock by some games\r |
162 | SRam.end = PicoRead32(0x1B8);\r |
163 | sram_size = 0x2000;\r |
164 | Pico.m.sram_reg = 4;\r |
165 | } else {\r |
166 | // normal SRAM\r |
167 | SRam.start = PicoRead32(0x1B4) & 0xFFFF00;\r |
168 | SRam.end = PicoRead32(0x1B8) | 1;\r |
169 | sram_size = SRam.end - SRam.start + 1;\r |
170 | }\r |
171 | Pico.m.sram_reg |= 0x10; // SRAM was detected\r |
172 | }\r |
173 | if(sram_size <= 0) {\r |
174 | // some games may have bad headers, like S&K and Sonic3\r |
175 | SRam.start = 0x200000;\r |
176 | SRam.end = 0x203FFF;\r |
177 | sram_size = 0x004000;\r |
178 | }\r |
179 | \r |
180 | // enable sram access by default if it doesn't overlap with ROM\r |
181 | if(Pico.romsize <= SRam.start) Pico.m.sram_reg |= 1;\r |
182 | SRam.reg_back = Pico.m.sram_reg;\r |
183 | \r |
184 | if(sram_size) {\r |
185 | SRam.data = (unsigned char *) calloc(sram_size, 1);\r |
186 | if(!SRam.data) return 1;\r |
187 | }\r |
188 | SRam.resize=0;\r |
189 | // Dino Dini's Soccer malfunctions if SRAM is not filled with 0xff\r |
190 | if (strncmp((char *)Pico.rom+0x150, "IDOND NI'I", 10) == 0)\r |
191 | memset(SRam.data, 0xff, sram_size);\r |
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192 | elprintf(EL_STATUS, "sram: det: %i; eeprom: %i; start: %06x; end: %06x",\r |
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193 | (Pico.m.sram_reg>>4)&1, (Pico.m.sram_reg>>2)&1, SRam.start, SRam.end);\r |
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194 | }\r |
195 | \r |
196 | Pico.m.sram_reg = SRam.reg_back; // restore sram_reg\r |
197 | SRam.changed = 0;\r |
198 | \r |
199 | return 0;\r |
200 | }\r |
201 | \r |
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202 | // dma2vram settings are just hacks to unglitch Legend of Galahad (needs <= 104 to work)\r |
203 | // same for Outrunners (92-121, when active is set to 24)\r |
204 | static const int dma_timings[] = {\r |
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205 | 83, 167, 166, 83, // vblank: 32cell: dma2vram dma2[vs|c]ram vram_fill vram_copy\r |
206 | 102, 205, 204, 102, // vblank: 40cell:\r |
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207 | 16, 16, 15, 8, // active: 32cell:\r |
208 | 24, 18, 17, 9 // ...\r |
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209 | };\r |
210 | \r |
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211 | static const int dma_bsycles[] = {\r |
212 | (488<<8)/82, (488<<8)/167, (488<<8)/166, (488<<8)/83,\r |
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213 | (488<<8)/102, (488<<8)/205, (488<<8)/204, (488<<8)/102,\r |
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214 | (488<<8)/16, (488<<8)/16, (488<<8)/15, (488<<8)/8,\r |
215 | (488<<8)/24, (488<<8)/18, (488<<8)/17, (488<<8)/9\r |
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216 | };\r |
217 | \r |
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218 | PICO_INTERNAL int CheckDMA(void)\r |
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219 | {\r |
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220 | int burn = 0, xfers_can, dma_op = Pico.video.reg[0x17]>>6; // see gens for 00 and 01 modes\r |
221 | int xfers = Pico.m.dma_xfers;\r |
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222 | int dma_op1;\r |
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223 | \r |
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224 | if(!(dma_op&2)) dma_op = (Pico.video.type==1) ? 0 : 1; // setting dma_timings offset here according to Gens\r |
225 | dma_op1 = dma_op;\r |
226 | if(Pico.video.reg[12] & 1) dma_op |= 4; // 40 cell mode?\r |
227 | if(!(Pico.video.status&8)&&(Pico.video.reg[1]&0x40)) dma_op|=8; // active display?\r |
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228 | xfers_can = dma_timings[dma_op];\r |
229 | if(xfers <= xfers_can) {\r |
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230 | if(dma_op&2) Pico.video.status&=~2; // dma no longer busy\r |
231 | else {\r |
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232 | burn = xfers * dma_bsycles[dma_op] >> 8; // have to be approximate because can't afford division..\r |
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233 | }\r |
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234 | Pico.m.dma_xfers = 0;\r |
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235 | } else {\r |
236 | if(!(dma_op&2)) burn = 488;\r |
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237 | Pico.m.dma_xfers -= xfers_can;\r |
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238 | }\r |
239 | \r |
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240 | elprintf(EL_VDPDMA, "~Dma %i op=%i can=%i burn=%i [%i]", Pico.m.dma_xfers, dma_op1, xfers_can, burn, SekCyclesDone());\r |
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241 | //dprintf("~aim: %i, cnt: %i", SekCycleAim, SekCycleCnt);\r |
242 | return burn;\r |
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243 | }\r |
244 | \r |
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245 | static __inline void SekRun(int cyc)\r |
246 | {\r |
247 | int cyc_do;\r |
248 | SekCycleAim+=cyc;\r |
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249 | //printf("aim: %i, cnt: %i\n", SekCycleAim, SekCycleCnt);\r |
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250 | if((cyc_do=SekCycleAim-SekCycleCnt) <= 0) return;\r |
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251 | //printf("cyc_do: %i\n", cyc_do);\r |
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252 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
253 | // this means we do run-compare Cyclone vs Musashi\r |
254 | SekCycleCnt+=CM_compareRun(cyc_do);\r |
255 | #elif defined(EMU_C68K)\r |
256 | PicoCpu.cycles=cyc_do;\r |
257 | CycloneRun(&PicoCpu);\r |
258 | SekCycleCnt+=cyc_do-PicoCpu.cycles;\r |
259 | #elif defined(EMU_A68K)\r |
260 | m68k_ICount=cyc_do;\r |
261 | M68000_RUN();\r |
262 | SekCycleCnt+=cyc_do-m68k_ICount;\r |
263 | #elif defined(EMU_M68K)\r |
264 | SekCycleCnt+=m68k_execute(cyc_do);\r |
265 | #endif\r |
266 | }\r |
267 | \r |
268 | static __inline void SekStep(void)\r |
269 | {\r |
270 | // this is required for timing sensitive stuff to work\r |
271 | int realaim=SekCycleAim; SekCycleAim=SekCycleCnt+1;\r |
272 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
273 | // this means we do run-compare Cyclone vs Musashi\r |
274 | SekCycleCnt+=CM_compareRun(1);\r |
275 | #elif defined(EMU_C68K)\r |
276 | PicoCpu.cycles=1;\r |
277 | CycloneRun(&PicoCpu);\r |
278 | SekCycleCnt+=1-PicoCpu.cycles;\r |
279 | #elif defined(EMU_A68K)\r |
280 | m68k_ICount=1;\r |
281 | M68000_RUN();\r |
282 | SekCycleCnt+=1-m68k_ICount;\r |
283 | #elif defined(EMU_M68K)\r |
284 | SekCycleCnt+=m68k_execute(1);\r |
285 | #endif\r |
286 | SekCycleAim=realaim;\r |
287 | }\r |
288 | \r |
289 | static int CheckIdle(void)\r |
290 | {\r |
291 | #if 1\r |
292 | unsigned char state[0x88];\r |
293 | \r |
294 | memset(state,0,sizeof(state));\r |
295 | \r |
296 | // See if the state is the same after 2 steps:\r |
297 | SekState(state); SekStep(); SekStep(); SekState(state+0x44);\r |
298 | if (memcmp(state,state+0x44,0x44)==0) return 1;\r |
299 | #else\r |
300 | unsigned char state[0x44];\r |
301 | static unsigned char oldstate[0x44];\r |
302 | \r |
303 | SekState(state);\r |
304 | if(memcmp(state,oldstate,0x40)==0) return 1;\r |
305 | memcpy(oldstate, state, 0x40);\r |
306 | #endif\r |
307 | \r |
308 | return 0;\r |
309 | }\r |
310 | \r |
311 | // to be called on 224 or line_sample scanlines only\r |
312 | static __inline void getSamples(int y)\r |
313 | {\r |
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314 | static int curr_pos = 0;\r |
315 | \r |
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316 | if(y == 224) {\r |
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317 | if(emustatus & 2)\r |
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318 | curr_pos += sound_render(curr_pos, PsndLen-PsndLen/2);\r |
319 | else curr_pos = sound_render(0, PsndLen);\r |
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320 | if (emustatus&1) emustatus|=2; else emustatus&=~2;\r |
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321 | if (PicoWriteSound) PicoWriteSound(curr_pos);\r |
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322 | // clear sound buffer\r |
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323 | sound_clear();\r |
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324 | }\r |
325 | else if(emustatus & 3) {\r |
326 | emustatus|= 2;\r |
327 | emustatus&=~1;\r |
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328 | curr_pos = sound_render(0, PsndLen/2);\r |
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329 | }\r |
330 | }\r |
331 | \r |
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332 | \r |
333 | #if 1*0\r |
334 | int vint_delay = 205/*68*/, as_delay = 18/*148*/;\r |
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335 | \r |
336 | // Accurate but slower frame which does hints\r |
337 | static int PicoFrameHints(void)\r |
338 | {\r |
339 | struct PicoVideo *pv=&Pico.video;\r |
340 | int total_z80=0,lines,y,lines_vis = 224,z80CycleAim = 0,line_sample;\r |
341 | const int cycles_68k=488,cycles_z80=228; // both PAL and NTSC compile to same values\r |
342 | int skip=PicoSkipFrame || (PicoOpt&0x10);\r |
343 | int hint; // Hint counter\r |
344 | \r |
345 | if(Pico.m.pal) { //\r |
346 | //cycles_68k = (int) ((double) OSC_PAL / 7 / 50 / 312 + 0.4); // should compile to a constant (488)\r |
347 | //cycles_z80 = (int) ((double) OSC_PAL / 15 / 50 / 312 + 0.4); // 228\r |
348 | lines = 312; // Steve Snake says there are 313 lines, but this seems to also work well\r |
349 | line_sample = 68;\r |
350 | if(pv->reg[1]&8) lines_vis = 240;\r |
351 | } else {\r |
352 | //cycles_68k = (int) ((double) OSC_NTSC / 7 / 60 / 262 + 0.4); // 488\r |
353 | //cycles_z80 = (int) ((double) OSC_NTSC / 15 / 60 / 262 + 0.4); // 228\r |
354 | lines = 262;\r |
355 | line_sample = 93;\r |
356 | }\r |
357 | \r |
358 | SekCyclesReset();\r |
359 | //z80ExtraCycles = 0;\r |
360 | \r |
361 | if(PicoOpt&4)\r |
362 | z80CycleAim = 0;\r |
363 | // z80_resetCycles();\r |
364 | \r |
365 | pv->status&=~0x88; // clear V-Int, come out of vblank\r |
366 | \r |
367 | hint=pv->reg[10]; // Load H-Int counter\r |
368 | //dprintf("-hint: %i", hint);\r |
369 | \r |
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370 | //SekRun(as_delay);\r |
371 | SekRun(148);\r |
372 | \r |
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373 | for (y=0;y<lines;y++)\r |
374 | {\r |
375 | Pico.m.scanline=(short)y;\r |
376 | \r |
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377 | // VDP FIFO\r |
378 | pv->lwrite_cnt -= 12;\r |
379 | if (pv->lwrite_cnt < 0) pv->lwrite_cnt=0;\r |
380 | if (pv->lwrite_cnt == 0)\r |
381 | Pico.video.status|=0x200;\r |
382 | \r |
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383 | // pad delay (for 6 button pads)\r |
384 | if(PicoOpt&0x20) {\r |
385 | if(Pico.m.padDelay[0]++ > 25) Pico.m.padTHPhase[0]=0;\r |
386 | if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0;\r |
387 | }\r |
388 | \r |
389 | // H-Interrupts:\r |
390 | if(y <= lines_vis && --hint < 0) // y <= lines_vis: Comix Zone, Golden Axe\r |
391 | {\r |
392 | //dprintf("rhint:old @ %06x", SekPc);\r |
393 | hint=pv->reg[10]; // Reload H-Int counter\r |
394 | pv->pending_ints|=0x10;\r |
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395 | if (pv->reg[0]&0x10) {\r |
396 | elprintf(EL_INTS, "hint: @ %06x [%i]", SekPc, SekCycleCnt);\r |
397 | SekInterrupt(4);\r |
398 | }\r |
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399 | //dprintf("hint_routine: %x", (*(unsigned short*)(Pico.ram+0x0B84)<<16)|*(unsigned short*)(Pico.ram+0x0B86));\r |
400 | }\r |
401 | \r |
402 | // V-Interrupt:\r |
403 | if (y == lines_vis)\r |
404 | {\r |
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405 | pv->status|=0x08; // go into vblank\r |
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406 | //pv->status|=0x80; // V-Int happened\r |
407 | //if(!Pico.m.dma_bytes||(Pico.video.reg[0x17]&0x80)) {\r |
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408 | // there must be a gap between H and V ints, also after vblank bit set (Mazin Saga, Bram Stoker's Dracula)\r |
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409 | SekRun(68); SekCycleAim-=68; // 128; ?\r |
410 | SekCycleAim-=148;\r |
411 | // SekRun(vint_delay); SekCycleAim-=vint_delay; // 128; ?\r |
412 | // SekCycleAim-=as_delay;\r |
413 | //}\r |
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414 | pv->pending_ints|=0x20;\r |
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415 | if(pv->reg[1]&0x20) {\r |
416 | elprintf(EL_INTS, "vint: @ %06x [%i]", SekPc, SekCycleCnt);\r |
417 | SekInterrupt(6);\r |
418 | }\r |
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419 | if(Pico.m.z80Run && (PicoOpt&4)) // ?\r |
420 | z80_int();\r |
421 | //dprintf("zint: [%i|%i] zPC=%04x", Pico.m.scanline, SekCyclesDone(), mz80GetRegisterValue(NULL, 0));\r |
422 | }\r |
423 | \r |
424 | // decide if we draw this line\r |
425 | #if CAN_HANDLE_240_LINES\r |
426 | if(!skip && ((!(pv->reg[1]&8) && y<224) || ((pv->reg[1]&8) && y<240)) )\r |
427 | #else\r |
428 | if(!skip && y<224)\r |
429 | #endif\r |
430 | PicoLine(y);\r |
431 | \r |
432 | if(PicoOpt&1)\r |
433 | sound_timers_and_dac(y);\r |
434 | \r |
435 | // get samples from sound chips\r |
436 | if(y == 32 && PsndOut)\r |
437 | emustatus &= ~1;\r |
438 | else if((y == 224 || y == line_sample) && PsndOut)\r |
439 | getSamples(y);\r |
440 | \r |
441 | // Run scanline:\r |
69996cb7 |
442 | if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());\r |
cc68a136 |
443 | SekRun(cycles_68k);\r |
d9153729 |
444 | if ((PicoOpt&4) && Pico.m.z80Run) {\r |
445 | if (Pico.m.z80Run & 2) z80CycleAim+=cycles_z80;\r |
446 | else {\r |
447 | int cnt = SekCyclesDone() - z80startCycle;\r |
448 | cnt = (cnt>>1)-(cnt>>5);\r |
449 | //if (cnt > cycles_z80) printf("FIXME: z80 cycles: %i\n", cnt);\r |
450 | if (cnt > cycles_z80) cnt = cycles_z80;\r |
451 | Pico.m.z80Run |= 2;\r |
452 | z80CycleAim+=cnt;\r |
453 | }\r |
cc68a136 |
454 | total_z80+=z80_run(z80CycleAim-total_z80);\r |
455 | }\r |
456 | }\r |
457 | \r |
458 | // draw a frame just after vblank in alternative render mode\r |
459 | if(!PicoSkipFrame && (PicoOpt&0x10))\r |
460 | PicoFrameFull();\r |
461 | \r |
462 | return 0;\r |
463 | }\r |
69996cb7 |
464 | #else\r |
465 | #include "PicoFrameHints.c"\r |
466 | #endif\r |
cc68a136 |
467 | \r |
468 | // helper z80 runner\r |
469 | static void PicoRunZ80Simple(int line_from, int line_to)\r |
470 | {\r |
471 | int line_from_r=line_from, line_to_r=line_to, line = line_from;\r |
472 | int line_sample = Pico.m.pal ? 68 : 93;\r |
cc68a136 |
473 | \r |
474 | if(!(PicoOpt&4) || Pico.m.z80Run == 0) { line_from_r = line_to_r; line_to_r = 0; }\r |
475 | \r |
cc68a136 |
476 | if(PicoOpt&1) {\r |
477 | // we have ym2612 enabled, so we have to run Z80 in lines, so we could update DAC and timers\r |
478 | for(; line < line_to; line++) {\r |
479 | sound_timers_and_dac(line);\r |
480 | if((line == 224 || line == line_sample) && PsndOut) getSamples(line);\r |
481 | if(line == 32 && PsndOut) emustatus &= ~1;\r |
482 | if(line >= line_from_r && line < line_to_r)\r |
483 | z80_run(228);\r |
484 | }\r |
485 | } else if(line_to_r-line_from_r > 0) {\r |
486 | z80_run(228*(line_to_r-line_from_r));\r |
487 | // samples will be taken by caller\r |
488 | }\r |
489 | }\r |
490 | \r |
491 | // Simple frame without H-Ints\r |
492 | static int PicoFrameSimple(void)\r |
493 | {\r |
494 | struct PicoVideo *pv=&Pico.video;\r |
495 | int y=0,line=0,lines=0,lines_step=0,sects;\r |
496 | int cycles_68k_vblock,cycles_68k_block;\r |
497 | \r |
2433f409 |
498 | if (Pico.m.pal) {\r |
cc68a136 |
499 | // M68k cycles/frame: 152009.78\r |
500 | if(pv->reg[1]&8) { // 240 lines\r |
501 | cycles_68k_block = (int) ((double) OSC_PAL / 7 / 50 / 312 * 15 + 0.4); // 16 sects, 16*15=240, 7308\r |
502 | cycles_68k_vblock = (int) ((double) OSC_PAL / 7 / 50 / 312 * 24 + 0.4); // 3 sects, 3*24=72, 35163?\r |
503 | lines_step = 15;\r |
504 | } else {\r |
505 | cycles_68k_block = (int) ((double) OSC_PAL / 7 / 50 / 312 * 14 + 0.4); // 16*14=224\r |
506 | cycles_68k_vblock = (int) ((double) OSC_PAL / 7 / 50 / 312 * 22 + 0.4); // 4 sects, 4*22=88\r |
507 | lines_step = 14;\r |
508 | }\r |
509 | } else {\r |
510 | // M68k cycles/frame: 127840.71\r |
511 | cycles_68k_block = (int) ((double) OSC_NTSC / 7 / 60 / 262 * 14 + 0.4); // 16*14=224, 6831\r |
512 | cycles_68k_vblock = (int) ((double) OSC_NTSC / 7 / 60 / 262 * 19 + 0.4); // 2 sects, 2*19=38, 18544\r |
513 | lines_step = 14;\r |
514 | }\r |
515 | \r |
69996cb7 |
516 | // we don't emulate DMA timing in this mode\r |
517 | if (Pico.m.dma_xfers) {\r |
518 | Pico.m.dma_xfers=0;\r |
519 | Pico.video.status&=~2;\r |
520 | }\r |
521 | \r |
522 | // VDP FIFO too\r |
523 | pv->lwrite_cnt = 0;\r |
524 | Pico.video.status|=0x200;\r |
525 | \r |
cc68a136 |
526 | Pico.m.scanline=-1;\r |
527 | \r |
528 | SekCyclesReset();\r |
529 | \r |
cc68a136 |
530 | // 6 button pad: let's just say it timed out now\r |
531 | Pico.m.padTHPhase[0]=Pico.m.padTHPhase[1]=0;\r |
532 | \r |
533 | // ---- Active Scan ----\r |
69996cb7 |
534 | pv->status&=~0x88; // clear V-Int, come out of vblank\r |
cc68a136 |
535 | \r |
536 | // Run in sections:\r |
537 | for(sects=16; sects; sects--)\r |
538 | {\r |
539 | if (CheckIdle()) break;\r |
540 | \r |
541 | lines += lines_step;\r |
542 | SekRun(cycles_68k_block);\r |
543 | \r |
544 | PicoRunZ80Simple(line, lines);\r |
545 | line=lines;\r |
546 | }\r |
547 | \r |
548 | // run Z80 for remaining sections\r |
549 | if(sects) {\r |
550 | int c = sects*cycles_68k_block;\r |
551 | \r |
552 | lines += sects*lines_step;\r |
553 | PicoRunZ80Simple(line, lines);\r |
554 | // this is for approriate line counter, etc\r |
555 | SekCycleCnt += c;\r |
556 | SekCycleAim += c;\r |
557 | }\r |
558 | \r |
559 | // here we render sound if ym2612 is disabled\r |
560 | if(!(PicoOpt&1) && PsndOut) {\r |
7a93adeb |
561 | int len = sound_render(0, PsndLen);\r |
562 | if(PicoWriteSound) PicoWriteSound(len);\r |
cc68a136 |
563 | // clear sound buffer\r |
7a93adeb |
564 | sound_clear();\r |
cc68a136 |
565 | }\r |
566 | \r |
567 | // render screen\r |
568 | if(!PicoSkipFrame) {\r |
569 | if(!(PicoOpt&0x10))\r |
570 | // Draw the screen\r |
571 | #if CAN_HANDLE_240_LINES\r |
572 | if(pv->reg[1]&8) {\r |
573 | for (y=0;y<240;y++) PicoLine(y);\r |
574 | } else {\r |
575 | for (y=0;y<224;y++) PicoLine(y);\r |
576 | }\r |
577 | #else\r |
578 | for (y=0;y<224;y++) PicoLine(y);\r |
579 | #endif\r |
580 | else PicoFrameFull();\r |
581 | }\r |
582 | \r |
583 | // ---- V-Blanking period ----\r |
584 | // fix line counts\r |
585 | if(Pico.m.pal) {\r |
586 | if(pv->reg[1]&8) { // 240 lines\r |
587 | lines = line = 240;\r |
588 | sects = 3;\r |
589 | lines_step = 24;\r |
590 | } else {\r |
591 | lines = line = 224;\r |
592 | sects = 4;\r |
593 | lines_step = 22;\r |
594 | }\r |
595 | } else {\r |
596 | lines = line = 224;\r |
597 | sects = 2;\r |
598 | lines_step = 19;\r |
599 | }\r |
600 | \r |
601 | //dprintf("vint: @ %06x [%i]", SekPc, SekCycleCnt);\r |
602 | pv->pending_ints|=0x20;\r |
603 | if (pv->reg[1]&0x20) SekInterrupt(6); // Set IRQ\r |
69996cb7 |
604 | pv->status|=8; // go into vblank\r |
cc68a136 |
605 | if(Pico.m.z80Run && (PicoOpt&4)) // ?\r |
606 | z80_int();\r |
607 | \r |
608 | while(sects) {\r |
609 | lines += lines_step;\r |
610 | \r |
611 | SekRun(cycles_68k_vblock);\r |
612 | \r |
613 | PicoRunZ80Simple(line, lines);\r |
614 | line=lines;\r |
615 | \r |
616 | sects--;\r |
617 | if(sects && CheckIdle()) break;\r |
618 | }\r |
619 | \r |
620 | // run Z80 for remaining sections\r |
621 | if(sects) {\r |
622 | lines += sects*lines_step;\r |
623 | PicoRunZ80Simple(line, lines);\r |
624 | }\r |
625 | \r |
626 | return 0;\r |
627 | }\r |
628 | \r |
629 | int PicoFrame(void)\r |
630 | {\r |
631 | int acc;\r |
632 | \r |
8c1952f0 |
633 | Pico.m.frame_count++;\r |
634 | \r |
cc68a136 |
635 | if (PicoMCD & 1) {\r |
636 | PicoFrameMCD();\r |
637 | return 0;\r |
638 | }\r |
639 | \r |
640 | // be accurate if we are asked for this\r |
641 | if(PicoOpt&0x40) acc=1;\r |
642 | // don't be accurate in alternative render mode, as hint effects will not be rendered anyway\r |
643 | else if(PicoOpt&0x10) acc = 0;\r |
644 | else acc=Pico.video.reg[0]&0x10; // be accurate if hints are used\r |
645 | \r |
646 | //if(Pico.video.reg[12]&0x2) Pico.video.status ^= 0x10; // change odd bit in interlace mode\r |
647 | \r |
648 | if(!(PicoOpt&0x10))\r |
649 | PicoFrameStart();\r |
650 | \r |
651 | if(acc)\r |
652 | PicoFrameHints();\r |
653 | else PicoFrameSimple();\r |
654 | \r |
655 | return 0;\r |
656 | }\r |
657 | \r |
a12e0116 |
658 | void PicoFrameDrawOnly(void)\r |
659 | {\r |
660 | int y;\r |
661 | PicoFrameStart();\r |
662 | for (y=0;y<224;y++) PicoLine(y);\r |
663 | }\r |
664 | \r |
66fdc0f0 |
665 | // callback to output message from emu\r |
666 | void (*PicoMessage)(const char *msg)=NULL;\r |
cc68a136 |
667 | \r |
0af33fe0 |
668 | #if defined(__DEBUG_PRINT) || defined(__GP2X__)\r |
cc68a136 |
669 | // tmp debug: dump some stuff\r |
670 | #define bit(r, x) ((r>>x)&1)\r |
671 | void z80_debug(char *dstr);\r |
0af33fe0 |
672 | char *debugString(void)\r |
cc68a136 |
673 | {\r |
674 | #if 1\r |
675 | static char dstr[1024];\r |
0af33fe0 |
676 | struct PicoVideo *pv=&Pico.video;\r |
677 | unsigned char *reg=pv->reg, r;\r |
678 | char *dstrp;\r |
679 | \r |
680 | dstrp = dstr;\r |
681 | sprintf(dstrp, "mode set 1: %02x\n", (r=reg[0])); dstrp+=strlen(dstrp);\r |
682 | sprintf(dstrp, "display_disable: %i, M3: %i, palette: %i, ?, hints: %i\n", bit(r,0), bit(r,1), bit(r,2), bit(r,4));\r |
683 | dstrp+=strlen(dstrp);\r |
684 | sprintf(dstrp, "mode set 2: %02x\n", (r=reg[1])); dstrp+=strlen(dstrp);\r |
685 | sprintf(dstrp, "SMS/gen: %i, pal: %i, dma: %i, vints: %i, disp: %i, TMS: %i\n", bit(r,2), bit(r,3), bit(r,4),\r |
686 | bit(r,5), bit(r,6), bit(r,7)); dstrp+=strlen(dstrp);\r |
687 | sprintf(dstrp, "mode set 3: %02x\n", (r=reg[0xB])); dstrp+=strlen(dstrp);\r |
688 | sprintf(dstrp, "LSCR: %i, HSCR: %i, 2cell vscroll: %i, IE2: %i\n", bit(r,0), bit(r,1), bit(r,2), bit(r,3)); dstrp+=strlen(dstrp);\r |
689 | sprintf(dstrp, "mode set 4: %02x\n", (r=reg[0xC])); dstrp+=strlen(dstrp);\r |
690 | sprintf(dstrp, "interlace: %i%i, cells: %i, shadow: %i\n", bit(r,2), bit(r,1), (r&0x80) ? 40 : 32, bit(r,3));\r |
691 | dstrp+=strlen(dstrp);\r |
692 | sprintf(dstrp, "scroll size: w: %i, h: %i SRAM: %i; eeprom: %i\n", reg[0x10]&3, (reg[0x10]&0x30)>>4,\r |
693 | bit(Pico.m.sram_reg, 4), bit(Pico.m.sram_reg, 2)); dstrp+=strlen(dstrp);\r |
7969166e |
694 | sprintf(dstrp, "sram range: %06x-%06x, reg: %02x\n", SRam.start, SRam.end, Pico.m.sram_reg); dstrp+=strlen(dstrp);\r |
0af33fe0 |
695 | sprintf(dstrp, "pend int: v:%i, h:%i, vdp status: %04x\n", bit(pv->pending_ints,5), bit(pv->pending_ints,4), pv->status);\r |
696 | dstrp+=strlen(dstrp);\r |
cc68a136 |
697 | #ifdef EMU_C68K\r |
0af33fe0 |
698 | sprintf(dstrp, "M68k: PC: %06x, st_flg: %x, cycles: %u\n", SekPc, PicoCpu.state_flags, SekCyclesDoneT());\r |
699 | dstrp+=strlen(dstrp);\r |
700 | sprintf(dstrp, "d0=%08x, a0=%08x, osp=%08x, irql=%i\n", PicoCpu.d[0], PicoCpu.a[0], PicoCpu.osp, PicoCpu.irq); dstrp+=strlen(dstrp);\r |
701 | sprintf(dstrp, "d1=%08x, a1=%08x, sr=%04x\n", PicoCpu.d[1], PicoCpu.a[1], CycloneGetSr(&PicoCpu)); dstrp+=strlen(dstrp);\r |
702 | for(r=2; r < 8; r++) {\r |
703 | sprintf(dstrp, "d%i=%08x, a%i=%08x\n", r, PicoCpu.d[r], r, PicoCpu.a[r]); dstrp+=strlen(dstrp);\r |
704 | }\r |
cc68a136 |
705 | #endif\r |
0af33fe0 |
706 | sprintf(dstrp, "z80Run: %i, pal: %i, frame#: %i\n", Pico.m.z80Run, Pico.m.pal, Pico.m.frame_count); dstrp+=strlen(dstrp);\r |
707 | z80_debug(dstrp); dstrp+=strlen(dstrp);\r |
708 | if (strlen(dstr) > sizeof(dstr))\r |
709 | printf("warning: debug buffer overflow (%i/%i)\n", strlen(dstr), sizeof(dstr));\r |
cc68a136 |
710 | \r |
711 | #else\r |
712 | struct PicoVideo *pvid=&Pico.video;\r |
713 | int table=0;\r |
714 | int i,u,n,link=0;\r |
715 | static char dstr[1024*8];\r |
716 | dstr[0] = 0;\r |
717 | \r |
718 | table=pvid->reg[5]&0x7f;\r |
719 | if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r |
720 | table<<=8; // Get sprite table address/2\r |
721 | \r |
722 | for (i=u=n=0; u < 80 && n < 20; u++)\r |
723 | {\r |
724 | unsigned int *sprite;\r |
725 | int code, code2, sx, sy, height;\r |
726 | \r |
727 | sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r |
728 | \r |
729 | // get sprite info\r |
730 | code = sprite[0];\r |
731 | \r |
732 | // check if it is on this line\r |
733 | sy = (code&0x1ff);//-0x80;\r |
734 | height = ((code>>24)&3)+1;\r |
735 | \r |
736 | // masking sprite?\r |
737 | code2 = sprite[1];\r |
738 | sx = (code2>>16)&0x1ff;\r |
739 | \r |
69996cb7 |
740 | printf("#%02i x: %03i y: %03i %ix%i\n", u, sx, sy, ((code>>26)&3)+1, height);\r |
cc68a136 |
741 | \r |
742 | link=(code>>16)&0x7f;\r |
743 | if(!link) break; // End of sprites\r |
744 | }\r |
745 | #endif\r |
746 | \r |
747 | #if 0\r |
748 | {\r |
749 | FILE *f = fopen("zram", "wb");\r |
750 | fwrite(Pico.zram, 1, 0x2000, f);\r |
751 | fclose(f);\r |
752 | }\r |
753 | #endif\r |
754 | \r |
755 | return dstr;\r |
756 | }\r |
757 | #endif\r |