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1 | // (c) Copyright 2007 notaz, All rights reserved. |
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2 | |
3 | |
4 | #include "../PicoInt.h" |
5 | #include "../sound/sound.h" |
6 | |
7 | |
76276b0b |
8 | extern unsigned char formatted_bram[4*0x10]; |
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9 | extern unsigned int s68k_poll_adclk; |
10 | |
721cd396 |
11 | void (*PicoMCDopenTray)(void) = NULL; |
12 | int (*PicoMCDcloseTray)(void) = NULL; |
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13 | |
14 | #define dump_ram(ram,fname) \ |
15 | { \ |
16 | int i, d; \ |
17 | FILE *f; \ |
18 | \ |
19 | for (i = 0; i < sizeof(ram); i+=2) { \ |
20 | d = (ram[i]<<8) | ram[i+1]; \ |
21 | *(unsigned short *)(ram+i) = d; \ |
22 | } \ |
23 | f = fopen(fname, "wb"); \ |
24 | if (f) { \ |
25 | fwrite(ram, 1, sizeof(ram), f); \ |
26 | fclose(f); \ |
27 | } \ |
28 | for (i = 0; i < sizeof(ram); i+=2) { \ |
29 | d = (ram[i]<<8) | ram[i+1]; \ |
30 | *(unsigned short *)(ram+i) = d; \ |
31 | } \ |
32 | } |
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33 | |
34 | |
35 | int PicoInitMCD(void) |
36 | { |
37 | SekInitS68k(); |
38 | Init_CD_Driver(); |
39 | |
40 | return 0; |
41 | } |
42 | |
43 | |
44 | void PicoExitMCD(void) |
45 | { |
46 | End_CD_Driver(); |
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47 | |
48 | //dump_ram(Pico_mcd->prg_ram, "prg.bin"); |
49 | //dump_ram(Pico.ram, "ram.bin"); |
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50 | } |
51 | |
52 | int PicoResetMCD(int hard) |
53 | { |
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54 | if (hard) { |
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55 | int fmt_size = sizeof(formatted_bram); |
56 | memset(Pico_mcd->prg_ram, 0, sizeof(Pico_mcd->prg_ram)); |
57 | memset(Pico_mcd->word_ram2M, 0, sizeof(Pico_mcd->word_ram2M)); |
58 | memset(Pico_mcd->pcm_ram, 0, sizeof(Pico_mcd->pcm_ram)); |
59 | memset(Pico_mcd->bram, 0, sizeof(Pico_mcd->bram)); |
60 | memcpy(Pico_mcd->bram + sizeof(Pico_mcd->bram) - fmt_size, formatted_bram, fmt_size); |
51a902ae |
61 | } |
62 | memset(Pico_mcd->s68k_regs, 0, sizeof(Pico_mcd->s68k_regs)); |
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63 | memset(&Pico_mcd->pcm, 0, sizeof(Pico_mcd->pcm)); |
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64 | memset(&Pico_mcd->m, 0, sizeof(Pico_mcd->m)); |
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65 | |
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66 | *(unsigned int *)(Pico_mcd->bios + 0x70) = 0xffffffff; // reset hint vector (simplest way to implement reg6) |
c008977e |
67 | Pico_mcd->m.state_flags |= 1; // s68k reset pending |
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68 | Pico_mcd->s68k_regs[3] = 1; // 2M word RAM mode with m68k access after reset |
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69 | |
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70 | Reset_CD(); |
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71 | LC89510_Reset(); |
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72 | gfx_cd_reset(); |
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73 | #ifdef _ASM_CD_MEMORY_C |
74 | PicoMemResetCD(1); |
00bd648e |
75 | //PicoMemResetCDdecode(1); // don't have to call this in 2M mode |
4ff2d527 |
76 | #endif |
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77 | |
6cadc2da |
78 | // use SRam.data for RAM cart |
79 | if (SRam.data) free(SRam.data); |
80 | SRam.data = NULL; |
81 | if (PicoOpt&0x8000) |
82 | SRam.data = calloc(1, 0x12000); |
83 | |
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84 | return 0; |
85 | } |
86 | |
87 | static __inline void SekRun(int cyc) |
88 | { |
89 | int cyc_do; |
90 | SekCycleAim+=cyc; |
91 | if((cyc_do=SekCycleAim-SekCycleCnt) < 0) return; |
b837b69b |
92 | #if defined(EMU_C68K) |
93 | PicoCpu.cycles=cyc_do; |
94 | CycloneRun(&PicoCpu); |
95 | SekCycleCnt+=cyc_do-PicoCpu.cycles; |
96 | #elif defined(EMU_M68K) |
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97 | m68k_set_context(&PicoM68kCPU); |
98 | SekCycleCnt+=m68k_execute(cyc_do); |
99 | #endif |
100 | } |
101 | |
102 | static __inline void SekRunS68k(int cyc) |
103 | { |
104 | int cyc_do; |
105 | SekCycleAimS68k+=cyc; |
106 | if((cyc_do=SekCycleAimS68k-SekCycleCntS68k) < 0) return; |
b837b69b |
107 | #if defined(EMU_C68K) |
108 | PicoCpuS68k.cycles=cyc_do; |
109 | CycloneRun(&PicoCpuS68k); |
110 | SekCycleCntS68k+=cyc_do-PicoCpuS68k.cycles; |
111 | #elif defined(EMU_M68K) |
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112 | m68k_set_context(&PicoS68kCPU); |
113 | SekCycleCntS68k+=m68k_execute(cyc_do); |
114 | #endif |
115 | } |
116 | |
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117 | #define PS_STEP_M68K ((488<<16)/20) // ~24 |
118 | //#define PS_STEP_S68K 13 |
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119 | |
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120 | #ifdef _ASM_CD_PICO_C |
121 | void SekRunPS(int cyc_m68k, int cyc_s68k); |
122 | #else |
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123 | static __inline void SekRunPS(int cyc_m68k, int cyc_s68k) |
124 | { |
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125 | int cycn, cycn_s68k, cyc_do; |
126 | int d_cm = 0, d_cs = 0, ex; |
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127 | SekCycleAim+=cyc_m68k; |
128 | SekCycleAimS68k+=cyc_s68k; |
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129 | |
130 | // fprintf(stderr, "=== start %3i/%3i [%3i/%3i] {%05i.%i} ===\n", cyc_m68k, cyc_s68k, |
131 | // SekCycleAim-SekCycleCnt, SekCycleAimS68k-SekCycleCntS68k, Pico.m.frame_count, Pico.m.scanline); |
132 | |
133 | /* loop 488 downto 0 in steps of PS_STEP */ |
134 | for (cycn = (488<<16)-PS_STEP_M68K; cycn >= 0; cycn -= PS_STEP_M68K) |
135 | { |
136 | ex = 0; |
137 | cycn_s68k = (cycn + cycn/2 + cycn/8) >> 16; |
138 | //fprintf(stderr, "%3i/%3i: ", cycn>>16, cycn_s68k); |
139 | if ((cyc_do = SekCycleAim-SekCycleCnt-(cycn>>16)) > 0) { |
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140 | #if defined(EMU_C68K) |
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141 | PicoCpu.cycles = cyc_do; |
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142 | CycloneRun(&PicoCpu); |
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143 | SekCycleCnt += cyc_do - PicoCpu.cycles; |
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144 | #elif defined(EMU_M68K) |
145 | m68k_set_context(&PicoM68kCPU); |
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146 | SekCycleCnt += (ex = m68k_execute(cyc_do)); |
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147 | #endif |
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148 | } |
149 | //fprintf(stderr, "%3i ", ex); d_cm += ex; ex = 0; |
150 | if ((cyc_do = SekCycleAimS68k-SekCycleCntS68k-cycn_s68k) > 0) { |
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151 | #if defined(EMU_C68K) |
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152 | PicoCpuS68k.cycles = cyc_do; |
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153 | CycloneRun(&PicoCpuS68k); |
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154 | SekCycleCntS68k += cyc_do - PicoCpuS68k.cycles; |
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155 | #elif defined(EMU_M68K) |
156 | m68k_set_context(&PicoS68kCPU); |
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157 | SekCycleCntS68k += (ex = m68k_execute(cyc_do)); |
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158 | #endif |
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159 | } |
160 | //fprintf(stderr, "%3i\n", ex); d_cs += ex; |
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161 | } |
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162 | |
163 | //fprintf(stderr, "== end %3i/%3i ==\n", d_cm, d_cs); |
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164 | } |
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165 | #endif |
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166 | |
167 | |
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168 | static __inline void check_cd_dma(void) |
169 | { |
170 | int ddx; |
171 | |
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172 | if (!(Pico_mcd->scd.Status_CDC & 0x08)) return; |
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173 | |
174 | ddx = Pico_mcd->s68k_regs[4] & 7; |
175 | if (ddx < 2) return; // invalid |
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176 | if (ddx < 4) { |
177 | Pico_mcd->s68k_regs[4] |= 0x40; // Data set ready in host port |
178 | return; |
179 | } |
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180 | if (ddx == 6) return; // invalid |
181 | |
182 | Update_CDC_TRansfer(ddx); // now go and do the actual transfer |
183 | } |
184 | |
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185 | static __inline void update_chips(void) |
186 | { |
187 | int counter_timer, int3_set; |
188 | int counter75hz_lim = Pico.m.pal ? 2080 : 2096; |
189 | |
190 | // 75Hz CDC update |
191 | if ((Pico_mcd->m.counter75hz+=10) >= counter75hz_lim) { |
192 | Pico_mcd->m.counter75hz -= counter75hz_lim; |
193 | Check_CD_Command(); |
194 | } |
195 | |
196 | // update timers |
197 | counter_timer = Pico.m.pal ? 0x21630 : 0x2121c; // 136752 : 135708; |
198 | Pico_mcd->m.timer_stopwatch += counter_timer; |
199 | if ((int3_set = Pico_mcd->s68k_regs[0x31])) { |
200 | Pico_mcd->m.timer_int3 -= counter_timer; |
201 | if (Pico_mcd->m.timer_int3 < 0) { |
202 | if (Pico_mcd->s68k_regs[0x33] & (1<<3)) { |
203 | dprintf("s68k: timer irq 3"); |
204 | SekInterruptS68k(3); |
205 | Pico_mcd->m.timer_int3 += int3_set << 16; |
206 | } |
207 | // is this really what happens if irq3 is masked out? |
208 | Pico_mcd->m.timer_int3 &= 0xffffff; |
209 | } |
210 | } |
211 | |
212 | // update gfx chip |
213 | if (Pico_mcd->rot_comp.Reg_58 & 0x8000) |
214 | gfx_cd_update(); |
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215 | |
216 | // delayed setting of DMNA bit (needed for Silpheed) |
217 | if (Pico_mcd->m.state_flags & 2) { |
218 | Pico_mcd->m.state_flags &= ~2; |
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219 | if (!(Pico_mcd->s68k_regs[3] & 4)) { |
220 | Pico_mcd->s68k_regs[3] |= 2; |
221 | Pico_mcd->s68k_regs[3] &= ~1; |
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222 | #ifdef USE_POLL_DETECT |
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223 | if ((s68k_poll_adclk&0xfe) == 2) { |
224 | SekSetStopS68k(0); s68k_poll_adclk = 0; |
225 | } |
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226 | #endif |
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227 | } |
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228 | } |
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229 | } |
230 | |
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231 | |
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232 | static int PicoFrameHintsMCD(void) |
233 | { |
234 | struct PicoVideo *pv=&Pico.video; |
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235 | int total_z80=0,lines,y,lines_vis = 224,z80CycleAim = 0,line_sample; |
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236 | const int cycles_68k=488,cycles_z80=228,cycles_s68k=795; // both PAL and NTSC compile to same values |
237 | int skip=PicoSkipFrame || (PicoOpt&0x10); |
238 | int hint; // Hint counter |
239 | |
240 | if(Pico.m.pal) { // |
241 | //cycles_68k = (int) ((double) OSC_PAL / 7 / 50 / 312 + 0.4); // should compile to a constant (488) |
242 | //cycles_z80 = (int) ((double) OSC_PAL / 15 / 50 / 312 + 0.4); // 228 |
243 | lines = 312; // Steve Snake says there are 313 lines, but this seems to also work well |
244 | line_sample = 68; |
245 | if(pv->reg[1]&8) lines_vis = 240; |
246 | } else { |
247 | //cycles_68k = (int) ((double) OSC_NTSC / 7 / 60 / 262 + 0.4); // 488 |
248 | //cycles_z80 = (int) ((double) OSC_NTSC / 15 / 60 / 262 + 0.4); // 228 |
249 | lines = 262; |
250 | line_sample = 93; |
251 | } |
252 | |
253 | SekCyclesReset(); |
254 | SekCyclesResetS68k(); |
255 | //z80ExtraCycles = 0; |
256 | |
257 | if(PicoOpt&4) |
258 | z80CycleAim = 0; |
259 | // z80_resetCycles(); |
260 | |
261 | pv->status&=~0x88; // clear V-Int, come out of vblank |
262 | |
263 | hint=pv->reg[10]; // Load H-Int counter |
264 | //dprintf("-hint: %i", hint); |
265 | |
266 | for (y=0;y<lines;y++) |
267 | { |
268 | Pico.m.scanline=(short)y; |
269 | |
270 | // pad delay (for 6 button pads) |
271 | if(PicoOpt&0x20) { |
272 | if(Pico.m.padDelay[0]++ > 25) Pico.m.padTHPhase[0]=0; |
273 | if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0; |
274 | } |
275 | |
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276 | check_cd_dma(); |
277 | |
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278 | // H-Interrupts: |
279 | if(y <= lines_vis && --hint < 0) // y <= lines_vis: Comix Zone, Golden Axe |
280 | { |
281 | //dprintf("rhint:old @ %06x", SekPc); |
282 | hint=pv->reg[10]; // Reload H-Int counter |
283 | pv->pending_ints|=0x10; |
284 | if (pv->reg[0]&0x10) SekInterrupt(4); |
285 | //dprintf("rhint: %i @ %06x [%i|%i]", hint, SekPc, y, SekCycleCnt); |
286 | //dprintf("hint_routine: %x", (*(unsigned short*)(Pico.ram+0x0B84)<<16)|*(unsigned short*)(Pico.ram+0x0B86)); |
287 | } |
288 | |
289 | // V-Interrupt: |
290 | if (y == lines_vis) |
291 | { |
292 | //dprintf("vint: @ %06x [%i|%i]", SekPc, y, SekCycleCnt); |
293 | pv->status|=0x88; // V-Int happened, go into vblank |
294 | SekRun(128); SekCycleAim-=128; // there must be a gap between H and V ints, also after vblank bit set (Mazin Saga, Bram Stoker's Dracula) |
295 | /*if(Pico.m.z80Run && (PicoOpt&4)) { |
296 | z80CycleAim+=cycles_z80/2; |
297 | total_z80+=z80_run(z80CycleAim-total_z80); |
298 | z80CycleAim-=cycles_z80/2; |
299 | }*/ |
300 | pv->pending_ints|=0x20; |
301 | if(pv->reg[1]&0x20) SekInterrupt(6); |
302 | if(Pico.m.z80Run && (PicoOpt&4)) // ? |
303 | z80_int(); |
304 | //dprintf("zint: [%i|%i] zPC=%04x", Pico.m.scanline, SekCyclesDone(), mz80GetRegisterValue(NULL, 0)); |
305 | } |
306 | |
307 | // decide if we draw this line |
308 | #if CAN_HANDLE_240_LINES |
309 | if(!skip && ((!(pv->reg[1]&8) && y<224) || ((pv->reg[1]&8) && y<240)) ) |
310 | #else |
311 | if(!skip && y<224) |
312 | #endif |
313 | PicoLine(y); |
314 | |
315 | if(PicoOpt&1) |
316 | sound_timers_and_dac(y); |
317 | |
318 | // get samples from sound chips |
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319 | if (y == 224 && PsndOut) { |
320 | int len = sound_render(0, PsndLen); |
321 | if (PicoWriteSound) PicoWriteSound(len); |
322 | // clear sound buffer |
323 | sound_clear(); |
324 | } |
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325 | |
326 | // Run scanline: |
327 | //dprintf("m68k starting exec @ %06x", SekPc); |
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328 | if (Pico.m.dma_bytes) SekCycleCnt+=CheckDMA(); |
329 | if ((PicoOpt & 0x2000) && (Pico_mcd->m.busreq&3) == 1) { |
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330 | SekRunPS(cycles_68k, cycles_s68k); // "better/perfect sync" |
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331 | } else { |
332 | SekRun(cycles_68k); |
333 | if ((Pico_mcd->m.busreq&3) == 1) // no busreq/no reset |
334 | SekRunS68k(cycles_s68k); |
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335 | } |
336 | |
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337 | if ((PicoOpt&4) && Pico.m.z80Run) { |
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338 | if (Pico.m.z80Run & 2) z80CycleAim+=cycles_z80; |
339 | else { |
340 | int cnt = SekCyclesDone() - z80startCycle; |
341 | cnt = (cnt>>1)-(cnt>>5); |
342 | //if (cnt > cycles_z80) printf("FIXME: z80 cycles: %i\n", cnt); |
343 | if (cnt > cycles_z80) cnt = cycles_z80; |
344 | Pico.m.z80Run |= 2; |
345 | z80CycleAim+=cnt; |
346 | } |
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347 | total_z80+=z80_run(z80CycleAim-total_z80); |
348 | } |
349 | |
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350 | update_chips(); |
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351 | } |
352 | |
353 | // draw a frame just after vblank in alternative render mode |
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354 | if (!PicoSkipFrame && (PicoOpt&0x10)) |
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355 | PicoFrameFull(); |
356 | |
357 | return 0; |
358 | } |
359 | |
360 | |
361 | int PicoFrameMCD(void) |
362 | { |
363 | if(!(PicoOpt&0x10)) |
364 | PicoFrameStart(); |
365 | |
366 | PicoFrameHintsMCD(); |
367 | |
368 | return 0; |
369 | } |
370 | |
371 | |