cc68a136 |
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 |
11 | #include "sound/sound.h"\r |
12 | #include "sound/ym2612.h"\r |
13 | \r |
b837b69b |
14 | int PicoVer=0x0110;\r |
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15 | struct Pico Pico;\r |
16 | int PicoOpt=0; // disable everything by default\r |
17 | int PicoSkipFrame=0; // skip rendering frame?\r |
18 | int PicoRegionOverride = 0; // override the region detection 0: Auto, 1: Japan NTSC, 2: Japan PAL, 4: US, 8: Europe\r |
51a902ae |
19 | int PicoAutoRgnOrder = 0;\r |
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20 | int emustatus = 0;\r |
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21 | void (*PicoWriteSound)(int len) = 0; // called once per frame at the best time to send sound buffer (PsndOut) to hardware\r |
cc68a136 |
22 | \r |
23 | struct PicoSRAM SRam;\r |
24 | int z80startCycle = 0, z80stopCycle = 0; // in 68k cycles\r |
25 | //int z80ExtraCycles = 0;\r |
bf098bc5 |
26 | int PicoPad[2]; // Joypads, format is SACB RLDU\r |
27 | int PicoMCD = 0; // mega CD status: scd_started, reset_pending\r |
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28 | \r |
29 | // to be called once on emu init\r |
30 | int PicoInit(void)\r |
31 | {\r |
32 | // Blank space for state:\r |
33 | memset(&Pico,0,sizeof(Pico));\r |
34 | memset(&PicoPad,0,sizeof(PicoPad));\r |
35 | \r |
36 | // Init CPUs:\r |
37 | SekInit();\r |
38 | z80_init(); // init even if we aren't going to use it\r |
39 | \r |
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40 | PicoInitMCD();\r |
41 | \r |
42 | // notaz: sram\r |
43 | SRam.data=0;\r |
44 | SRam.resize=1;\r |
45 | \r |
46 | return 0;\r |
47 | }\r |
48 | \r |
49 | // to be called once on emu exit\r |
50 | void PicoExit(void)\r |
51 | {\r |
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52 | if (PicoMCD&1)\r |
53 | PicoExitMCD();\r |
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54 | z80_exit();\r |
55 | \r |
56 | // notaz: sram\r |
57 | if(SRam.data) free(SRam.data); SRam.data=0;\r |
58 | }\r |
59 | \r |
60 | int PicoReset(int hard)\r |
61 | {\r |
62 | unsigned int region=0;\r |
63 | int support=0,hw=0,i=0;\r |
64 | unsigned char pal=0;\r |
65 | \r |
66 | if (Pico.romsize<=0) return 1;\r |
67 | \r |
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68 | // setup correct memory map\r |
69 | if (PicoMCD & 1)\r |
70 | PicoMemSetupCD();\r |
71 | else PicoMemSetup();\r |
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72 | PicoMemReset();\r |
73 | SekReset();\r |
74 | SekCycleCntT=0;\r |
75 | z80_reset();\r |
76 | \r |
77 | // reset VDP state, VRAM and PicoMisc\r |
78 | //memset(&Pico.video,0,sizeof(Pico.video));\r |
79 | //memset(&Pico.vram,0,sizeof(Pico.vram));\r |
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80 | memset(Pico.ioports,0,sizeof(Pico.ioports)); // needed for MCD to reset properly\r |
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81 | memset(&Pico.m,0,sizeof(Pico.m));\r |
82 | Pico.video.pending_ints=0;\r |
83 | emustatus = 0;\r |
84 | \r |
85 | if(hard) {\r |
86 | // clear all memory of the emulated machine\r |
87 | memset(&Pico.ram,0,(unsigned int)&Pico.rom-(unsigned int)&Pico.ram);\r |
88 | }\r |
89 | \r |
90 | // default VDP register values (based on Fusion)\r |
91 | Pico.video.reg[0] = Pico.video.reg[1] = 0x04;\r |
92 | Pico.video.reg[0xc] = 0x81;\r |
93 | Pico.video.reg[0xf] = 0x02;\r |
94 | Pico.m.dirtyPal = 1;\r |
95 | \r |
96 | if(PicoRegionOverride)\r |
97 | {\r |
98 | support = PicoRegionOverride;\r |
99 | }\r |
100 | else\r |
101 | {\r |
102 | // Read cartridge region data:\r |
103 | region=PicoRead32(0x1f0);\r |
104 | \r |
105 | for (i=0;i<4;i++)\r |
106 | {\r |
107 | int c=0;\r |
108 | \r |
109 | c=region>>(i<<3); c&=0xff;\r |
110 | if (c<=' ') continue;\r |
111 | \r |
51a902ae |
112 | if (c=='J') support|=1;\r |
113 | else if (c=='U') support|=4;\r |
114 | else if (c=='E') support|=8;\r |
115 | else if (c=='j') {support|=1; break; }\r |
116 | else if (c=='u') {support|=4; break; }\r |
117 | else if (c=='e') {support|=8; break; }\r |
cc68a136 |
118 | else\r |
119 | {\r |
120 | // New style code:\r |
121 | char s[2]={0,0};\r |
122 | s[0]=(char)c;\r |
123 | support|=strtol(s,NULL,16);\r |
124 | }\r |
125 | }\r |
126 | }\r |
127 | \r |
51a902ae |
128 | // auto detection order override\r |
129 | if (PicoAutoRgnOrder) {\r |
130 | if (((PicoAutoRgnOrder>>0)&0xf) & support) support = (PicoAutoRgnOrder>>0)&0xf;\r |
131 | else if (((PicoAutoRgnOrder>>4)&0xf) & support) support = (PicoAutoRgnOrder>>4)&0xf;\r |
132 | else if (((PicoAutoRgnOrder>>8)&0xf) & support) support = (PicoAutoRgnOrder>>8)&0xf;\r |
133 | }\r |
134 | \r |
cc68a136 |
135 | // Try to pick the best hardware value for English/50hz:\r |
136 | if (support&8) { hw=0xc0; pal=1; } // Europe\r |
137 | else if (support&4) hw=0x80; // USA\r |
138 | else if (support&2) { hw=0x40; pal=1; } // Japan PAL\r |
139 | else if (support&1) hw=0x00; // Japan NTSC\r |
140 | else hw=0x80; // USA\r |
141 | \r |
142 | Pico.m.hardware=(unsigned char)(hw|0x20); // No disk attached\r |
143 | Pico.m.pal=pal;\r |
144 | Pico.video.status = 0x3408 | pal; // always set bits | vblank | pal\r |
145 | \r |
146 | sound_reset(); // pal must be known here\r |
147 | \r |
148 | if (PicoMCD & 1) {\r |
149 | PicoResetMCD(hard);\r |
150 | SRam.data = 0;\r |
151 | return 0;\r |
152 | }\r |
153 | \r |
154 | \r |
155 | // notaz: sram\r |
156 | if(SRam.resize) {\r |
157 | int sram_size = 0;\r |
158 | if(SRam.data) free(SRam.data); SRam.data=0;\r |
159 | Pico.m.sram_reg = 0;\r |
160 | \r |
161 | if(*(Pico.rom+0x1B1) == 'R' && *(Pico.rom+0x1B0) == 'A') {\r |
162 | if(*(Pico.rom+0x1B2) & 0x40) {\r |
163 | // EEPROM SRAM\r |
164 | // what kind of EEPROMs are actually used? X24C02? X24C04? (X24C01 has only 128), but we will support up to 8K\r |
165 | SRam.start = PicoRead32(0x1B4) & ~1; // zero address is used for clock by some games\r |
166 | SRam.end = PicoRead32(0x1B8);\r |
167 | sram_size = 0x2000;\r |
168 | Pico.m.sram_reg = 4;\r |
169 | } else {\r |
170 | // normal SRAM\r |
171 | SRam.start = PicoRead32(0x1B4) & 0xFFFF00;\r |
172 | SRam.end = PicoRead32(0x1B8) | 1;\r |
173 | sram_size = SRam.end - SRam.start + 1;\r |
174 | }\r |
175 | Pico.m.sram_reg |= 0x10; // SRAM was detected\r |
176 | }\r |
177 | if(sram_size <= 0) {\r |
178 | // some games may have bad headers, like S&K and Sonic3\r |
179 | SRam.start = 0x200000;\r |
180 | SRam.end = 0x203FFF;\r |
181 | sram_size = 0x004000;\r |
182 | }\r |
183 | \r |
184 | // enable sram access by default if it doesn't overlap with ROM\r |
185 | if(Pico.romsize <= SRam.start) Pico.m.sram_reg |= 1;\r |
186 | SRam.reg_back = Pico.m.sram_reg;\r |
187 | \r |
188 | if(sram_size) {\r |
189 | SRam.data = (unsigned char *) calloc(sram_size, 1);\r |
190 | if(!SRam.data) return 1;\r |
191 | }\r |
192 | SRam.resize=0;\r |
193 | // Dino Dini's Soccer malfunctions if SRAM is not filled with 0xff\r |
194 | if (strncmp((char *)Pico.rom+0x150, "IDOND NI'I", 10) == 0)\r |
195 | memset(SRam.data, 0xff, sram_size);\r |
196 | }\r |
197 | \r |
198 | Pico.m.sram_reg = SRam.reg_back; // restore sram_reg\r |
199 | SRam.changed = 0;\r |
200 | \r |
201 | return 0;\r |
202 | }\r |
203 | \r |
4f672280 |
204 | static int dma_timings[] = {\r |
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 |
207 | 8, 16, 15, 8, // active: 32cell:\r |
208 | 9, 18, 17, 9 // ...\r |
209 | };\r |
210 | \r |
312e9ce1 |
211 | static int dma_bsycles[] = {\r |
212 | (488<<8)/83, (488<<8)/167, (488<<8)/166, (488<<8)/83,\r |
213 | (488<<8)/102, (488<<8)/205, (488<<8)/204, (488<<8)/102,\r |
214 | (488<<8)/8, (488<<8)/16, (488<<8)/15, (488<<8)/8,\r |
215 | (488<<8)/9, (488<<8)/18, (488<<8)/17, (488<<8)/9\r |
216 | };\r |
217 | \r |
218 | //static\r |
219 | int CheckDMA(void)\r |
4f672280 |
220 | {\r |
221 | int burn = 0, bytes_can = 0, dma_op = Pico.video.reg[0x17]>>6; // see gens for 00 and 01 modes\r |
222 | int bytes = Pico.m.dma_bytes;\r |
312e9ce1 |
223 | int dma_op1;\r |
4f672280 |
224 | \r |
312e9ce1 |
225 | if(!(dma_op&2)) dma_op = (Pico.video.type==1) ? 0 : 1; // setting dma_timings offset here according to Gens\r |
226 | dma_op1 = dma_op;\r |
227 | if(Pico.video.reg[12] & 1) dma_op |= 4; // 40 cell mode?\r |
228 | if(!(Pico.video.status&8)&&(Pico.video.reg[1]&0x40)) dma_op|=8; // active display?\r |
229 | bytes_can = dma_timings[dma_op];\r |
4f672280 |
230 | \r |
231 | if(bytes <= bytes_can) {\r |
232 | if(dma_op&2) Pico.video.status&=~2; // dma no longer busy\r |
233 | else {\r |
312e9ce1 |
234 | burn = bytes * dma_bsycles[dma_op] >> 8; // have to be approximate because can't afford division..\r |
235 | //SekCycleCnt-=Pico.m.dma_endcycles;\r |
236 | //Pico.m.dma_endcycles = 0;\r |
4f672280 |
237 | }\r |
238 | Pico.m.dma_bytes = 0;\r |
239 | } else {\r |
240 | if(!(dma_op&2)) burn = 488;\r |
241 | Pico.m.dma_bytes -= bytes_can;\r |
242 | }\r |
243 | \r |
312e9ce1 |
244 | //SekCycleCnt+=burn;\r |
245 | dprintf("~Dma %i op=%i can=%i burn=%i [%i|%i]", Pico.m.dma_bytes, dma_op1, bytes_can, burn, Pico.m.scanline, SekCyclesDone());\r |
246 | //dprintf("~aim: %i, cnt: %i", SekCycleAim, SekCycleCnt);\r |
247 | return burn;\r |
4f672280 |
248 | }\r |
249 | \r |
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250 | static __inline void SekRun(int cyc)\r |
251 | {\r |
252 | int cyc_do;\r |
253 | SekCycleAim+=cyc;\r |
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254 | //dprintf("aim: %i, cnt: %i", SekCycleAim, SekCycleCnt);\r |
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255 | if((cyc_do=SekCycleAim-SekCycleCnt) <= 0) return;\r |
312e9ce1 |
256 | //dprintf("cyc_do: %i", cyc_do);\r |
cc68a136 |
257 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
258 | // this means we do run-compare Cyclone vs Musashi\r |
259 | SekCycleCnt+=CM_compareRun(cyc_do);\r |
260 | #elif defined(EMU_C68K)\r |
261 | PicoCpu.cycles=cyc_do;\r |
262 | CycloneRun(&PicoCpu);\r |
263 | SekCycleCnt+=cyc_do-PicoCpu.cycles;\r |
264 | #elif defined(EMU_A68K)\r |
265 | m68k_ICount=cyc_do;\r |
266 | M68000_RUN();\r |
267 | SekCycleCnt+=cyc_do-m68k_ICount;\r |
268 | #elif defined(EMU_M68K)\r |
269 | SekCycleCnt+=m68k_execute(cyc_do);\r |
270 | #endif\r |
271 | }\r |
272 | \r |
273 | static __inline void SekStep(void)\r |
274 | {\r |
275 | // this is required for timing sensitive stuff to work\r |
276 | int realaim=SekCycleAim; SekCycleAim=SekCycleCnt+1;\r |
277 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
278 | // this means we do run-compare Cyclone vs Musashi\r |
279 | SekCycleCnt+=CM_compareRun(1);\r |
280 | #elif defined(EMU_C68K)\r |
281 | PicoCpu.cycles=1;\r |
282 | CycloneRun(&PicoCpu);\r |
283 | SekCycleCnt+=1-PicoCpu.cycles;\r |
284 | #elif defined(EMU_A68K)\r |
285 | m68k_ICount=1;\r |
286 | M68000_RUN();\r |
287 | SekCycleCnt+=1-m68k_ICount;\r |
288 | #elif defined(EMU_M68K)\r |
289 | SekCycleCnt+=m68k_execute(1);\r |
290 | #endif\r |
291 | SekCycleAim=realaim;\r |
292 | }\r |
293 | \r |
294 | static int CheckIdle(void)\r |
295 | {\r |
296 | #if 1\r |
297 | unsigned char state[0x88];\r |
298 | \r |
299 | memset(state,0,sizeof(state));\r |
300 | \r |
301 | // See if the state is the same after 2 steps:\r |
302 | SekState(state); SekStep(); SekStep(); SekState(state+0x44);\r |
303 | if (memcmp(state,state+0x44,0x44)==0) return 1;\r |
304 | #else\r |
305 | unsigned char state[0x44];\r |
306 | static unsigned char oldstate[0x44];\r |
307 | \r |
308 | SekState(state);\r |
309 | if(memcmp(state,oldstate,0x40)==0) return 1;\r |
310 | memcpy(oldstate, state, 0x40);\r |
311 | #endif\r |
312 | \r |
313 | return 0;\r |
314 | }\r |
315 | \r |
316 | // to be called on 224 or line_sample scanlines only\r |
317 | static __inline void getSamples(int y)\r |
318 | {\r |
7a93adeb |
319 | static int curr_pos = 0;\r |
320 | \r |
cc68a136 |
321 | if(y == 224) {\r |
322 | //dprintf("sta%i: %i [%i]", (emustatus & 2), emustatus, y);\r |
323 | if(emustatus & 2)\r |
7a93adeb |
324 | curr_pos += sound_render(curr_pos, PsndLen-PsndLen/2);\r |
325 | else curr_pos = sound_render(0, PsndLen);\r |
cc68a136 |
326 | if (emustatus&1) emustatus|=2; else emustatus&=~2;\r |
7a93adeb |
327 | if (PicoWriteSound) PicoWriteSound(curr_pos);\r |
cc68a136 |
328 | // clear sound buffer\r |
4f265db7 |
329 | sound_clear();\r |
cc68a136 |
330 | }\r |
331 | else if(emustatus & 3) {\r |
332 | emustatus|= 2;\r |
333 | emustatus&=~1;\r |
7a93adeb |
334 | curr_pos = sound_render(0, PsndLen/2);\r |
cc68a136 |
335 | }\r |
336 | }\r |
337 | \r |
338 | //extern UINT32 mz80GetRegisterValue(void *, UINT32);\r |
339 | \r |
340 | // Accurate but slower frame which does hints\r |
341 | static int PicoFrameHints(void)\r |
342 | {\r |
343 | struct PicoVideo *pv=&Pico.video;\r |
344 | int total_z80=0,lines,y,lines_vis = 224,z80CycleAim = 0,line_sample;\r |
345 | const int cycles_68k=488,cycles_z80=228; // both PAL and NTSC compile to same values\r |
346 | int skip=PicoSkipFrame || (PicoOpt&0x10);\r |
347 | int hint; // Hint counter\r |
348 | \r |
349 | if(Pico.m.pal) { //\r |
350 | //cycles_68k = (int) ((double) OSC_PAL / 7 / 50 / 312 + 0.4); // should compile to a constant (488)\r |
351 | //cycles_z80 = (int) ((double) OSC_PAL / 15 / 50 / 312 + 0.4); // 228\r |
352 | lines = 312; // Steve Snake says there are 313 lines, but this seems to also work well\r |
353 | line_sample = 68;\r |
354 | if(pv->reg[1]&8) lines_vis = 240;\r |
355 | } else {\r |
356 | //cycles_68k = (int) ((double) OSC_NTSC / 7 / 60 / 262 + 0.4); // 488\r |
357 | //cycles_z80 = (int) ((double) OSC_NTSC / 15 / 60 / 262 + 0.4); // 228\r |
358 | lines = 262;\r |
359 | line_sample = 93;\r |
360 | }\r |
361 | \r |
362 | SekCyclesReset();\r |
363 | //z80ExtraCycles = 0;\r |
364 | \r |
365 | if(PicoOpt&4)\r |
366 | z80CycleAim = 0;\r |
367 | // z80_resetCycles();\r |
368 | \r |
369 | pv->status&=~0x88; // clear V-Int, come out of vblank\r |
370 | \r |
371 | hint=pv->reg[10]; // Load H-Int counter\r |
372 | //dprintf("-hint: %i", hint);\r |
373 | \r |
374 | for (y=0;y<lines;y++)\r |
375 | {\r |
376 | Pico.m.scanline=(short)y;\r |
377 | \r |
378 | // pad delay (for 6 button pads)\r |
379 | if(PicoOpt&0x20) {\r |
380 | if(Pico.m.padDelay[0]++ > 25) Pico.m.padTHPhase[0]=0;\r |
381 | if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0;\r |
382 | }\r |
383 | \r |
384 | // H-Interrupts:\r |
385 | if(y <= lines_vis && --hint < 0) // y <= lines_vis: Comix Zone, Golden Axe\r |
386 | {\r |
387 | //dprintf("rhint:old @ %06x", SekPc);\r |
388 | hint=pv->reg[10]; // Reload H-Int counter\r |
389 | pv->pending_ints|=0x10;\r |
390 | if (pv->reg[0]&0x10) SekInterrupt(4);\r |
391 | //dprintf("rhint: %i @ %06x [%i|%i]", hint, SekPc, y, SekCycleCnt);\r |
392 | //dprintf("hint_routine: %x", (*(unsigned short*)(Pico.ram+0x0B84)<<16)|*(unsigned short*)(Pico.ram+0x0B86));\r |
393 | }\r |
394 | \r |
395 | // V-Interrupt:\r |
396 | if (y == lines_vis)\r |
397 | {\r |
312e9ce1 |
398 | dprintf("vint: @ %06x [%i|%i], aim=%i cnt=%i", SekPc, y, SekCycleCnt, SekCycleAim, SekCycleCnt);\r |
399 | pv->status|=0x08; // go into vblank\r |
4f672280 |
400 | if(!Pico.m.dma_bytes||(Pico.video.reg[0x17]&0x80)) {\r |
401 | // there must be a gap between H and V ints, also after vblank bit set (Mazin Saga, Bram Stoker's Dracula)\r |
312e9ce1 |
402 | SekRun(128); SekCycleAim-=128; // 128; ?\r |
4f672280 |
403 | }\r |
312e9ce1 |
404 | dprintf("[%i|%i], aim=%i cnt=%i @ %x", y, SekCycleCnt, SekCycleAim, SekCycleCnt, SekPc);\r |
405 | pv->status|=0x80; // V-Int happened\r |
cc68a136 |
406 | pv->pending_ints|=0x20;\r |
407 | if(pv->reg[1]&0x20) SekInterrupt(6);\r |
408 | if(Pico.m.z80Run && (PicoOpt&4)) // ?\r |
409 | z80_int();\r |
410 | //dprintf("zint: [%i|%i] zPC=%04x", Pico.m.scanline, SekCyclesDone(), mz80GetRegisterValue(NULL, 0));\r |
411 | }\r |
412 | \r |
413 | // decide if we draw this line\r |
414 | #if CAN_HANDLE_240_LINES\r |
415 | if(!skip && ((!(pv->reg[1]&8) && y<224) || ((pv->reg[1]&8) && y<240)) )\r |
416 | #else\r |
417 | if(!skip && y<224)\r |
418 | #endif\r |
419 | PicoLine(y);\r |
420 | \r |
421 | if(PicoOpt&1)\r |
422 | sound_timers_and_dac(y);\r |
423 | \r |
424 | // get samples from sound chips\r |
425 | if(y == 32 && PsndOut)\r |
426 | emustatus &= ~1;\r |
427 | else if((y == 224 || y == line_sample) && PsndOut)\r |
428 | getSamples(y);\r |
429 | \r |
430 | // Run scanline:\r |
312e9ce1 |
431 | if(Pico.m.dma_bytes) SekCycleCnt+=CheckDMA();\r |
cc68a136 |
432 | SekRun(cycles_68k);\r |
433 | if((PicoOpt&4) && Pico.m.z80Run) {\r |
434 | Pico.m.z80Run|=2;\r |
435 | z80CycleAim+=cycles_z80;\r |
436 | total_z80+=z80_run(z80CycleAim-total_z80);\r |
437 | }\r |
438 | }\r |
439 | \r |
440 | // draw a frame just after vblank in alternative render mode\r |
441 | if(!PicoSkipFrame && (PicoOpt&0x10))\r |
442 | PicoFrameFull();\r |
443 | \r |
444 | return 0;\r |
445 | }\r |
446 | \r |
447 | // helper z80 runner\r |
448 | static void PicoRunZ80Simple(int line_from, int line_to)\r |
449 | {\r |
450 | int line_from_r=line_from, line_to_r=line_to, line = line_from;\r |
451 | int line_sample = Pico.m.pal ? 68 : 93;\r |
452 | extern const unsigned short vcounts[];\r |
453 | \r |
454 | if(!(PicoOpt&4) || Pico.m.z80Run == 0) { line_from_r = line_to_r; line_to_r = 0; }\r |
455 | \r |
456 | if(z80startCycle != 0) {\r |
457 | line_from_r = vcounts[z80startCycle>>8]+1;\r |
458 | z80startCycle = 0;\r |
459 | }\r |
460 | if(z80stopCycle != 0) {\r |
461 | line_to_r = vcounts[z80stopCycle>>8]+1;\r |
462 | z80stopCycle = 0;\r |
463 | }\r |
464 | \r |
465 | if(PicoOpt&1) {\r |
466 | // we have ym2612 enabled, so we have to run Z80 in lines, so we could update DAC and timers\r |
467 | for(; line < line_to; line++) {\r |
468 | sound_timers_and_dac(line);\r |
469 | if((line == 224 || line == line_sample) && PsndOut) getSamples(line);\r |
470 | if(line == 32 && PsndOut) emustatus &= ~1;\r |
471 | if(line >= line_from_r && line < line_to_r)\r |
472 | z80_run(228);\r |
473 | }\r |
474 | } else if(line_to_r-line_from_r > 0) {\r |
475 | z80_run(228*(line_to_r-line_from_r));\r |
476 | // samples will be taken by caller\r |
477 | }\r |
478 | }\r |
479 | \r |
480 | // Simple frame without H-Ints\r |
481 | static int PicoFrameSimple(void)\r |
482 | {\r |
483 | struct PicoVideo *pv=&Pico.video;\r |
484 | int y=0,line=0,lines=0,lines_step=0,sects;\r |
485 | int cycles_68k_vblock,cycles_68k_block;\r |
486 | \r |
487 | if(Pico.m.pal) {\r |
488 | // M68k cycles/frame: 152009.78\r |
489 | if(pv->reg[1]&8) { // 240 lines\r |
490 | cycles_68k_block = (int) ((double) OSC_PAL / 7 / 50 / 312 * 15 + 0.4); // 16 sects, 16*15=240, 7308\r |
491 | cycles_68k_vblock = (int) ((double) OSC_PAL / 7 / 50 / 312 * 24 + 0.4); // 3 sects, 3*24=72, 35163?\r |
492 | lines_step = 15;\r |
493 | } else {\r |
494 | cycles_68k_block = (int) ((double) OSC_PAL / 7 / 50 / 312 * 14 + 0.4); // 16*14=224\r |
495 | cycles_68k_vblock = (int) ((double) OSC_PAL / 7 / 50 / 312 * 22 + 0.4); // 4 sects, 4*22=88\r |
496 | lines_step = 14;\r |
497 | }\r |
498 | } else {\r |
499 | // M68k cycles/frame: 127840.71\r |
500 | cycles_68k_block = (int) ((double) OSC_NTSC / 7 / 60 / 262 * 14 + 0.4); // 16*14=224, 6831\r |
501 | cycles_68k_vblock = (int) ((double) OSC_NTSC / 7 / 60 / 262 * 19 + 0.4); // 2 sects, 2*19=38, 18544\r |
502 | lines_step = 14;\r |
503 | }\r |
504 | \r |
505 | Pico.m.scanline=-1;\r |
506 | \r |
507 | SekCyclesReset();\r |
508 | \r |
509 | if(PicoOpt&4)\r |
510 | z80_resetCycles();\r |
511 | \r |
512 | // 6 button pad: let's just say it timed out now\r |
513 | Pico.m.padTHPhase[0]=Pico.m.padTHPhase[1]=0;\r |
514 | \r |
515 | // ---- Active Scan ----\r |
516 | pv->status&=~88; // clear V-Int, come out of vblank\r |
517 | \r |
518 | // Run in sections:\r |
519 | for(sects=16; sects; sects--)\r |
520 | {\r |
521 | if (CheckIdle()) break;\r |
522 | \r |
523 | lines += lines_step;\r |
524 | SekRun(cycles_68k_block);\r |
525 | \r |
526 | PicoRunZ80Simple(line, lines);\r |
527 | line=lines;\r |
528 | }\r |
529 | \r |
530 | // run Z80 for remaining sections\r |
531 | if(sects) {\r |
532 | int c = sects*cycles_68k_block;\r |
533 | \r |
534 | lines += sects*lines_step;\r |
535 | PicoRunZ80Simple(line, lines);\r |
536 | // this is for approriate line counter, etc\r |
537 | SekCycleCnt += c;\r |
538 | SekCycleAim += c;\r |
539 | }\r |
540 | \r |
541 | // here we render sound if ym2612 is disabled\r |
542 | if(!(PicoOpt&1) && PsndOut) {\r |
7a93adeb |
543 | int len = sound_render(0, PsndLen);\r |
544 | if(PicoWriteSound) PicoWriteSound(len);\r |
cc68a136 |
545 | // clear sound buffer\r |
7a93adeb |
546 | sound_clear();\r |
cc68a136 |
547 | }\r |
548 | \r |
549 | // render screen\r |
550 | if(!PicoSkipFrame) {\r |
551 | if(!(PicoOpt&0x10))\r |
552 | // Draw the screen\r |
553 | #if CAN_HANDLE_240_LINES\r |
554 | if(pv->reg[1]&8) {\r |
555 | for (y=0;y<240;y++) PicoLine(y);\r |
556 | } else {\r |
557 | for (y=0;y<224;y++) PicoLine(y);\r |
558 | }\r |
559 | #else\r |
560 | for (y=0;y<224;y++) PicoLine(y);\r |
561 | #endif\r |
562 | else PicoFrameFull();\r |
563 | }\r |
564 | \r |
565 | // ---- V-Blanking period ----\r |
566 | // fix line counts\r |
567 | if(Pico.m.pal) {\r |
568 | if(pv->reg[1]&8) { // 240 lines\r |
569 | lines = line = 240;\r |
570 | sects = 3;\r |
571 | lines_step = 24;\r |
572 | } else {\r |
573 | lines = line = 224;\r |
574 | sects = 4;\r |
575 | lines_step = 22;\r |
576 | }\r |
577 | } else {\r |
578 | lines = line = 224;\r |
579 | sects = 2;\r |
580 | lines_step = 19;\r |
581 | }\r |
582 | \r |
583 | //dprintf("vint: @ %06x [%i]", SekPc, SekCycleCnt);\r |
584 | pv->pending_ints|=0x20;\r |
585 | if (pv->reg[1]&0x20) SekInterrupt(6); // Set IRQ\r |
586 | pv->status|=0x88; // V-Int happened / go into vblank\r |
587 | if(Pico.m.z80Run && (PicoOpt&4)) // ?\r |
588 | z80_int();\r |
589 | \r |
590 | while(sects) {\r |
591 | lines += lines_step;\r |
592 | \r |
593 | SekRun(cycles_68k_vblock);\r |
594 | \r |
595 | PicoRunZ80Simple(line, lines);\r |
596 | line=lines;\r |
597 | \r |
598 | sects--;\r |
599 | if(sects && CheckIdle()) break;\r |
600 | }\r |
601 | \r |
602 | // run Z80 for remaining sections\r |
603 | if(sects) {\r |
604 | lines += sects*lines_step;\r |
605 | PicoRunZ80Simple(line, lines);\r |
606 | }\r |
607 | \r |
608 | return 0;\r |
609 | }\r |
610 | \r |
611 | int PicoFrame(void)\r |
612 | {\r |
613 | int acc;\r |
614 | \r |
8c1952f0 |
615 | Pico.m.frame_count++;\r |
616 | \r |
cc68a136 |
617 | if (PicoMCD & 1) {\r |
618 | PicoFrameMCD();\r |
619 | return 0;\r |
620 | }\r |
621 | \r |
622 | // be accurate if we are asked for this\r |
623 | if(PicoOpt&0x40) acc=1;\r |
624 | // don't be accurate in alternative render mode, as hint effects will not be rendered anyway\r |
625 | else if(PicoOpt&0x10) acc = 0;\r |
626 | else acc=Pico.video.reg[0]&0x10; // be accurate if hints are used\r |
627 | \r |
628 | //if(Pico.video.reg[12]&0x2) Pico.video.status ^= 0x10; // change odd bit in interlace mode\r |
629 | \r |
630 | if(!(PicoOpt&0x10))\r |
631 | PicoFrameStart();\r |
632 | \r |
633 | if(acc)\r |
634 | PicoFrameHints();\r |
635 | else PicoFrameSimple();\r |
636 | \r |
637 | return 0;\r |
638 | }\r |
639 | \r |
66fdc0f0 |
640 | // callback to output message from emu\r |
641 | void (*PicoMessage)(const char *msg)=NULL;\r |
cc68a136 |
642 | \r |
643 | #if defined(__DEBUG_PRINT) || defined(WIN32)\r |
644 | // tmp debug: dump some stuff\r |
645 | #define bit(r, x) ((r>>x)&1)\r |
646 | void z80_debug(char *dstr);\r |
647 | char *debugString()\r |
648 | {\r |
649 | #if 1\r |
650 | static char dstr[1024];\r |
651 | unsigned char *reg=Pico.video.reg, r;\r |
652 | \r |
653 | // dump some info\r |
654 | sprintf(dstr, "mode set 1: %02x\n", (r=reg[0]));\r |
655 | sprintf(dstr, "%sdisplay_disable: %i, M3: %i, palette: %i, ?, hints: %i\n\n", dstr, bit(r,0), bit(r,1), bit(r,2), bit(r,4));\r |
656 | sprintf(dstr, "%smode set 2: %02x\n", dstr, (r=reg[1]));\r |
657 | sprintf(dstr, "%sSMS/genesis: %i, pal: %i, dma: %i, vints: %i, disp: %i, TMS9918: %i\n\n",dstr, bit(r,2), bit(r,3), bit(r,4), bit(r,5), bit(r,6), bit(r,7));\r |
658 | sprintf(dstr, "%smode set 3: %02x\n", dstr, (r=reg[0xB]));\r |
659 | sprintf(dstr, "%sLSCR: %i, HSCR: %i, 2cell vscroll: %i, IE2: %i\n\n", dstr, bit(r,0), bit(r,1), bit(r,2), bit(r,3));\r |
660 | sprintf(dstr, "%smode set 4: %02x\n", dstr, (r=reg[0xC]));\r |
661 | sprintf(dstr, "%sinterlace: %i%i; cells: %i; shadow: %i\n\n", dstr, bit(r,2), bit(r,1), (r&0x80) ? 40 : 32, bit(r,3));\r |
662 | sprintf(dstr, "%sscroll size: w: %i; h: %i\n\n", dstr, reg[0x10]&3, (reg[0x10]&0x30)>>4);\r |
663 | sprintf(dstr, "%sSRAM: det: %i; eeprom: %i\n", dstr, bit(Pico.m.sram_reg, 4), bit(Pico.m.sram_reg, 2));\r |
664 | sprintf(dstr, "%sCPU state: PC: %06x cycles: %i\n", dstr, SekPc, SekCyclesDoneT());\r |
665 | #ifdef EMU_C68K\r |
666 | for(r=0; r < 8; r++)\r |
667 | sprintf(dstr, "%sd%i=%08x, a%i=%08x\n", dstr, r, PicoCpu.d[r], r, PicoCpu.a[r]);\r |
668 | #endif\r |
669 | z80_debug(dstr);\r |
670 | \r |
671 | #else\r |
672 | struct PicoVideo *pvid=&Pico.video;\r |
673 | int table=0;\r |
674 | int i,u,n,link=0;\r |
675 | static char dstr[1024*8];\r |
676 | dstr[0] = 0;\r |
677 | \r |
678 | table=pvid->reg[5]&0x7f;\r |
679 | if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r |
680 | table<<=8; // Get sprite table address/2\r |
681 | \r |
682 | for (i=u=n=0; u < 80 && n < 20; u++)\r |
683 | {\r |
684 | unsigned int *sprite;\r |
685 | int code, code2, sx, sy, height;\r |
686 | \r |
687 | sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r |
688 | \r |
689 | // get sprite info\r |
690 | code = sprite[0];\r |
691 | \r |
692 | // check if it is on this line\r |
693 | sy = (code&0x1ff);//-0x80;\r |
694 | height = ((code>>24)&3)+1;\r |
695 | \r |
696 | // masking sprite?\r |
697 | code2 = sprite[1];\r |
698 | sx = (code2>>16)&0x1ff;\r |
699 | \r |
700 | dprintf("#%02i x: %03i y: %03i %ix%i", u, sx, sy, ((code>>26)&3)+1, height);\r |
701 | \r |
702 | link=(code>>16)&0x7f;\r |
703 | if(!link) break; // End of sprites\r |
704 | }\r |
705 | #endif\r |
706 | \r |
707 | #if 0\r |
708 | {\r |
709 | FILE *f = fopen("zram", "wb");\r |
710 | fwrite(Pico.zram, 1, 0x2000, f);\r |
711 | fclose(f);\r |
712 | }\r |
713 | #endif\r |
714 | \r |
715 | return dstr;\r |
716 | }\r |
717 | #endif\r |