X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2FPicoFrameHints.c;h=7a372bf773c272be188d4c0dc20e68a655cb4c56;hb=b06778874d140bd5187cb74444ddc40931b9bd1d;hp=e27484d4fb2ac461b3f467a188432b4c4b3675eb;hpb=69996cb7c62468cd97842e35bdd2b74006a28dba;p=picodrive.git diff --git a/Pico/PicoFrameHints.c b/Pico/PicoFrameHints.c index e27484d..7a372bf 100644 --- a/Pico/PicoFrameHints.c +++ b/Pico/PicoFrameHints.c @@ -1,52 +1,69 @@ +// common code for Pico.c and cd/Pico.c +// (c) Copyright 2007,2008 Grazvydas "notaz" Ignotas + #define CYCLES_M68K_LINE 488 // suitable for both PAL/NTSC #define CYCLES_M68K_VINT_LAG 68 #define CYCLES_M68K_ASD 148 -#define CYCLES_Z80_LINE 228 -#define CYCLES_Z80_ASD 69 +#define CYCLES_S68K_LINE 795 +#define CYCLES_S68K_ASD 241 // pad delay (for 6 button pads) #define PAD_DELAY \ - if (PicoOpt&0x20) { \ + if (PicoOpt&POPT_6BTN_PAD) { \ if(Pico.m.padDelay[0]++ > 25) Pico.m.padTHPhase[0]=0; \ if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0; \ } -#define Z80_RUN(z80_cycles) \ +// CPUS_RUN +#ifndef PICO_CD +#define CPUS_RUN(m68k_cycles,s68k_cycles) \ + SekRunM68k(m68k_cycles); +#else +#define CPUS_RUN(m68k_cycles,s68k_cycles) \ { \ - if ((PicoOpt&4) && Pico.m.z80Run) \ - { \ - if (Pico.m.z80Run & 2) z80CycleAim += z80_cycles; \ - else { \ - int cnt = SekCyclesDone() - z80startCycle; \ - cnt = (cnt>>1)-(cnt>>5); \ - if (cnt > (z80_cycles)) cnt = z80_cycles; \ - Pico.m.z80Run |= 2; \ - z80CycleAim+=cnt; \ + if ((PicoOpt&POPT_EN_MCD_PSYNC) && (Pico_mcd->m.busreq&3) == 1) { \ + SekRunPS(m68k_cycles, s68k_cycles); /* "better/perfect sync" */ \ + } else { \ + SekRunM68k(m68k_cycles); \ + if ((Pico_mcd->m.busreq&3) == 1) /* no busreq/no reset */ \ + SekRunS68k(s68k_cycles); \ } \ - total_z80+=z80_run(z80CycleAim-total_z80); \ - } \ } +#endif // Accurate but slower frame which does hints static int PicoFrameHints(void) { struct PicoVideo *pv=&Pico.video; - int total_z80=0,lines,y,lines_vis = 224,z80CycleAim = 0,line_sample; - int skip=PicoSkipFrame || (PicoOpt&0x10); + int lines, y, lines_vis = 224, line_sample, skip, vcnt_wrap; int hint; // Hint counter + pv->v_counter = Pico.m.scanline = 0; + + if ((PicoOpt&POPT_ALT_RENDERER) && !PicoSkipFrame && (pv->reg[1]&0x40)) { // fast rend., display enabled + // draw a frame just after vblank in alternative render mode + // yes, this will cause 1 frame lag, but this is inaccurate mode anyway. + PicoFrameFull(); +#ifdef DRAW_FINISH_FUNC + DRAW_FINISH_FUNC(); +#endif + skip = 1; + } + else skip=PicoSkipFrame; + if (Pico.m.pal) { - //cycles_68k = (int) ((double) OSC_PAL / 7 / 50 / 312 + 0.4); // should compile to a constant (488) - //cycles_z80 = (int) ((double) OSC_PAL / 15 / 50 / 312 + 0.4); // 228 line_sample = 68; - if(pv->reg[1]&8) lines_vis = 240; + if (pv->reg[1]&8) lines_vis = 240; } else { - //cycles_68k = (int) ((double) OSC_NTSC / 7 / 60 / 262 + 0.4); // 488 - //cycles_z80 = (int) ((double) OSC_NTSC / 15 / 60 / 262 + 0.4); // 228 line_sample = 93; } SekCyclesReset(); + z80_resetCycles(); +#ifdef PICO_CD + SekCyclesResetS68k(); +#endif + PsndDacLine = 0; pv->status&=~0x88; // clear V-Int, come out of vblank @@ -54,12 +71,16 @@ static int PicoFrameHints(void) //dprintf("-hint: %i", hint); // This is to make active scan longer (needed for Double Dragon 2, mainly) - SekRun(CYCLES_M68K_ASD); - Z80_RUN(CYCLES_Z80_ASD); + CPUS_RUN(CYCLES_M68K_ASD, CYCLES_S68K_ASD); - for (y=0;yv_counter = Pico.m.scanline = y; + if ((pv->reg[12]&6) == 6) { // interlace mode 2 + pv->v_counter <<= 1; + pv->v_counter |= pv->v_counter >> 8; + pv->v_counter &= 0xff; + } // VDP FIFO pv->lwrite_cnt -= 12; @@ -69,6 +90,9 @@ static int PicoFrameHints(void) } PAD_DELAY +#ifdef PICO_CD + check_cd_dma(); +#endif // H-Interrupts: if (--hint < 0) // y <= lines_vis: Comix Zone, Golden Axe @@ -82,36 +106,65 @@ static int PicoFrameHints(void) } // decide if we draw this line -#if CAN_HANDLE_240_LINES - if(!skip && ((!(pv->reg[1]&8) && y<224) || (pv->reg[1]&8)) ) -#else - if(!skip && y<224) + if (!skip && (PicoOpt & POPT_ALT_RENDERER)) + { + // find the right moment for frame renderer, when display is no longer blanked + if ((pv->reg[1]&0x40) || y > 100) { + PicoFrameFull(); +#ifdef DRAW_FINISH_FUNC + DRAW_FINISH_FUNC(); #endif - PicoLine(y); - - if(PicoOpt&1) - sound_timers_and_dac(y); + skip = 1; + } + } +#ifndef PICO_CD // get samples from sound chips - if(y == 32 && PsndOut) + if (y == 32 && PsndOut) emustatus &= ~1; - else if((y == 224 || y == line_sample) && PsndOut) + else if ((y == 224 || y == line_sample) && PsndOut) + { + if (Pico.m.z80Run && (PicoOpt&POPT_EN_Z80)) + PicoSyncZ80(SekCycleCnt); + if (ym2612.dacen && PsndDacLine <= y) + PsndDoDAC(y); getSamples(y); + } +#endif // Run scanline: if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA()); - SekRun(CYCLES_M68K_LINE); - Z80_RUN(CYCLES_Z80_LINE); + CPUS_RUN(CYCLES_M68K_LINE, CYCLES_S68K_LINE); + +#ifdef PICO_CD + update_chips(); +#else + if (PicoLineHook) PicoLineHook(); +#endif + } + + if (!skip) + { + if (DrawScanline < y) + PicoDrawSync(y - 1, 0); +#ifdef DRAW_FINISH_FUNC + DRAW_FINISH_FUNC(); +#endif } // V-int line (224 or 240) - Pico.m.scanline=(short)y; + Pico.m.scanline = y; + pv->v_counter = 0xe0; // bad for 240 mode + if ((pv->reg[12]&6) == 6) pv->v_counter = 0xc1; // VDP FIFO pv->lwrite_cnt=0; Pico.video.status|=0x200; PAD_DELAY +#ifdef PICO_CD + check_cd_dma(); +#endif // Last H-Int: if (--hint < 0) @@ -122,7 +175,6 @@ static int PicoFrameHints(void) if (pv->reg[0]&0x10) SekInterrupt(4); } - // V-Interrupt: pv->status|=0x08; // go into vblank pv->pending_ints|=0x20; @@ -130,51 +182,80 @@ static int PicoFrameHints(void) // there must be a delay after vblank bit is set and irq is asserted (Mazin Saga) // also delay between F bit (bit 7) is set in SR and IRQ happens (Ex-Mutants) // also delay between last H-int and V-int (Golden Axe 3) - SekRun(CYCLES_M68K_VINT_LAG); + SekRunM68k(CYCLES_M68K_VINT_LAG); + if (pv->reg[1]&0x20) { elprintf(EL_INTS, "vint: @ %06x [%i]", SekPc, SekCycleCnt); SekInterrupt(6); } - if (Pico.m.z80Run && (PicoOpt&4)) + if (Pico.m.z80Run && (PicoOpt&POPT_EN_Z80)) { + PicoSyncZ80(SekCycleCnt); + elprintf(EL_INTS, "zint"); z80_int(); - - if (PicoOpt&1) - sound_timers_and_dac(y); + } // get samples from sound chips - if ((y == 224) && PsndOut) - getSamples(y); +#ifndef PICO_CD + if (y == 224) +#endif + if (PsndOut) + { + if (ym2612.dacen && PsndDacLine <= y) + PsndDoDAC(y); + getSamples(y); + } // Run scanline: if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA()); - SekRun(CYCLES_M68K_LINE - CYCLES_M68K_VINT_LAG - CYCLES_M68K_ASD); - Z80_RUN(CYCLES_Z80_LINE - CYCLES_Z80_ASD); + CPUS_RUN(CYCLES_M68K_LINE - CYCLES_M68K_VINT_LAG - CYCLES_M68K_ASD, + CYCLES_S68K_LINE - CYCLES_S68K_ASD); + +#ifdef PICO_CD + update_chips(); +#else + if (PicoLineHook) PicoLineHook(); +#endif // PAL line count might actually be 313 according to Steve Snake, but that would complicate things. lines = Pico.m.pal ? 312 : 262; + vcnt_wrap = Pico.m.pal ? 0x103 : 0xEB; // based on Gens - for (y++;yv_counter = Pico.m.scanline = y; + if (y >= vcnt_wrap) + pv->v_counter -= Pico.m.pal ? 56 : 6; + if ((pv->reg[12]&6) == 6) + pv->v_counter = (pv->v_counter << 1) | 1; + pv->v_counter &= 0xff; PAD_DELAY - - if(PicoOpt&1) - sound_timers_and_dac(y); +#ifdef PICO_CD + check_cd_dma(); +#endif // Run scanline: if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA()); - SekRun(CYCLES_M68K_LINE); - Z80_RUN(CYCLES_Z80_LINE); + CPUS_RUN(CYCLES_M68K_LINE, CYCLES_S68K_LINE); + +#ifdef PICO_CD + update_chips(); +#else + if (PicoLineHook) PicoLineHook(); +#endif } - // draw a frame just after vblank in alternative render mode - if (!PicoSkipFrame && (PicoOpt&0x10)) - PicoFrameFull(); + // sync z80 + if (Pico.m.z80Run && (PicoOpt&POPT_EN_Z80)) + PicoSyncZ80(Pico.m.pal ? 151809 : 127671); // cycles adjusted for converter + if (PsndOut && ym2612.dacen && PsndDacLine <= lines-1) + PsndDoDAC(lines-1); + + timers_cycle(); return 0; } #undef PAD_DELAY -#undef Z80_RUN +#undef CPUS_RUN