1 // common code for Pico.c and cd/Pico.c
2 // (c) Copyright 2007-2009 Grazvydas "notaz" Ignotas
4 #define CYCLES_M68K_LINE 488 // suitable for both PAL/NTSC
5 #define CYCLES_M68K_VINT_LAG 68
6 #define CYCLES_M68K_ASD 148
7 #define CYCLES_S68K_LINE 795
8 #define CYCLES_S68K_ASD 241
10 // pad delay (for 6 button pads)
12 if (PicoOpt&POPT_6BTN_PAD) { \
13 if(Pico.m.padDelay[0]++ > 25) Pico.m.padTHPhase[0]=0; \
14 if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0; \
23 #define CPUS_RUN(m68k_cycles,s68k_cycles) \
25 SekRunM68k(m68k_cycles); \
26 RUN_SH2S(m68k_cycles); \
29 #define CPUS_RUN(m68k_cycles,s68k_cycles) \
31 if ((PicoOpt&POPT_EN_MCD_PSYNC) && (Pico_mcd->m.busreq&3) == 1) { \
32 SekRunPS(m68k_cycles, s68k_cycles); /* "better/perfect sync" */ \
34 SekRunM68k(m68k_cycles); \
35 if ((Pico_mcd->m.busreq&3) == 1) /* no busreq/no reset */ \
36 SekRunS68k(s68k_cycles); \
41 static int PicoFrameHints(void)
43 struct PicoVideo *pv=&Pico.video;
44 int lines, y, lines_vis = 224, line_sample, skip, vcnt_wrap;
45 int hint; // Hint counter
47 pv->v_counter = Pico.m.scanline = 0;
49 if ((PicoOpt&POPT_ALT_RENDERER) && !PicoSkipFrame && (pv->reg[1]&0x40)) { // fast rend., display enabled
50 // draw a frame just after vblank in alternative render mode
51 // yes, this will cause 1 frame lag, but this is inaccurate mode anyway.
53 #ifdef DRAW_FINISH_FUNC
58 else skip=PicoSkipFrame;
62 if (pv->reg[1]&8) lines_vis = 240;
75 pv->status&=~0x88; // clear V-Int, come out of vblank
77 hint=pv->reg[10]; // Load H-Int counter
78 //dprintf("-hint: %i", hint);
80 // This is to make active scan longer (needed for Double Dragon 2, mainly)
81 CPUS_RUN(CYCLES_M68K_ASD, CYCLES_S68K_ASD);
83 for (y = 0; y < lines_vis; y++)
85 pv->v_counter = Pico.m.scanline = y;
86 if ((pv->reg[12]&6) == 6) { // interlace mode 2
88 pv->v_counter |= pv->v_counter >> 8;
89 pv->v_counter &= 0xff;
94 if (pv->lwrite_cnt <= 0) {
96 Pico.video.status|=0x200;
104 p32x_pwm_irq_check(1);
108 if (--hint < 0) // y <= lines_vis: Comix Zone, Golden Axe
110 hint=pv->reg[10]; // Reload H-Int counter
111 pv->pending_ints|=0x10;
112 if (pv->reg[0]&0x10) {
113 elprintf(EL_INTS, "hint: @ %06x [%i]", SekPc, SekCycleCnt);
118 // decide if we draw this line
119 if (!skip && (PicoOpt & POPT_ALT_RENDERER))
121 // find the right moment for frame renderer, when display is no longer blanked
122 if ((pv->reg[1]&0x40) || y > 100) {
124 #ifdef DRAW_FINISH_FUNC
131 // get samples from sound chips
132 if ((y == 224 || y == line_sample) && PsndOut)
134 if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80))
135 PicoSyncZ80(SekCycleCnt);
136 if (ym2612.dacen && PsndDacLine <= y)
142 if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
143 CPUS_RUN(CYCLES_M68K_LINE, CYCLES_S68K_LINE);
148 if (PicoLineHook) PicoLineHook();
154 if (DrawScanline < y)
155 PicoDrawSync(y - 1, 0);
156 #ifdef DRAW_FINISH_FUNC
161 // V-int line (224 or 240)
163 pv->v_counter = 0xe0; // bad for 240 mode
164 if ((pv->reg[12]&6) == 6) pv->v_counter = 0xc1;
168 Pico.video.status|=0x200;
170 memcpy(PicoPadInt, PicoPad, sizeof(PicoPadInt));
176 p32x_pwm_irq_check(1);
182 hint=pv->reg[10]; // Reload H-Int counter
183 pv->pending_ints|=0x10;
184 //printf("rhint: %i @ %06x [%i|%i]\n", hint, SekPc, y, SekCycleCnt);
185 if (pv->reg[0]&0x10) SekInterrupt(4);
188 pv->status|=0x08; // go into vblank
189 pv->pending_ints|=0x20;
195 // the following SekRun is there for several reasons:
196 // there must be a delay after vblank bit is set and irq is asserted (Mazin Saga)
197 // also delay between F bit (bit 7) is set in SR and IRQ happens (Ex-Mutants)
198 // also delay between last H-int and V-int (Golden Axe 3)
199 SekRunM68k(CYCLES_M68K_VINT_LAG);
201 if (pv->reg[1]&0x20) {
202 elprintf(EL_INTS, "vint: @ %06x [%i]", SekPc, SekCycleCnt);
205 if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80)) {
206 PicoSyncZ80(SekCycleCnt);
207 elprintf(EL_INTS, "zint");
211 // get samples from sound chips
212 if (y == 224 && PsndOut)
214 if (ym2612.dacen && PsndDacLine <= y)
220 if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
221 CPUS_RUN(CYCLES_M68K_LINE - CYCLES_M68K_VINT_LAG - CYCLES_M68K_ASD,
222 CYCLES_S68K_LINE - CYCLES_S68K_ASD);
227 if (PicoLineHook) PicoLineHook();
230 lines = scanlines_total;
231 vcnt_wrap = Pico.m.pal ? 0x103 : 0xEB; // based on Gens, TODO: verify
233 for (y++; y < lines; y++)
235 pv->v_counter = Pico.m.scanline = y;
237 pv->v_counter -= Pico.m.pal ? 56 : 6;
238 if ((pv->reg[12]&6) == 6)
239 pv->v_counter = (pv->v_counter << 1) | 1;
240 pv->v_counter &= 0xff;
247 p32x_pwm_irq_check(1);
251 if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
252 CPUS_RUN(CYCLES_M68K_LINE, CYCLES_S68K_LINE);
257 if (PicoLineHook) PicoLineHook();
262 if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80))
263 PicoSyncZ80(Pico.m.pal ? 151809 : 127671); // cycles adjusted for converter
264 if (PsndOut && ym2612.dacen && PsndDacLine <= lines-1)