X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2Fcd%2FPico.c;h=6db7e6aefcfa81f0e1e8e04e31812528be9eeabd;hb=b5e5172d049a83251874fb33e65a53c9654dc0bc;hp=d98795603a9dda94c3934fb2dd758d3524d2e721;hpb=672ad671130bb662f099b790fdaef4be85e6c146;p=picodrive.git diff --git a/Pico/cd/Pico.c b/Pico/cd/Pico.c index d987956..6db7e6a 100644 --- a/Pico/cd/Pico.c +++ b/Pico/cd/Pico.c @@ -1,20 +1,37 @@ -// This is part of Pico Library - -// (c) Copyright 2004 Dave, All rights reserved. // (c) Copyright 2007 notaz, All rights reserved. -// Free for non-commercial use. - -// For commercial use, separate licencing terms must be obtained. #include "../PicoInt.h" -#include "../sound/sound.h" -static int counter75hz = 0; // TODO: move 2 context +extern unsigned char formatted_bram[4*0x10]; +extern unsigned int s68k_poll_adclk; + +void (*PicoMCDopenTray)(void) = NULL; +int (*PicoMCDcloseTray)(void) = NULL; + +#define dump_ram(ram,fname) \ +{ \ + int i, d; \ + FILE *f; \ +\ + for (i = 0; i < sizeof(ram); i+=2) { \ + d = (ram[i]<<8) | ram[i+1]; \ + *(unsigned short *)(ram+i) = d; \ + } \ + f = fopen(fname, "wb"); \ + if (f) { \ + fwrite(ram, 1, sizeof(ram), f); \ + fclose(f); \ + } \ + for (i = 0; i < sizeof(ram); i+=2) { \ + d = (ram[i]<<8) | ram[i+1]; \ + *(unsigned short *)(ram+i) = d; \ + } \ +} -int PicoInitMCD(void) +PICO_INTERNAL int PicoInitMCD(void) { SekInitS68k(); Init_CD_Driver(); @@ -23,33 +40,66 @@ int PicoInitMCD(void) } -void PicoExitMCD(void) +PICO_INTERNAL void PicoExitMCD(void) { End_CD_Driver(); + + //dump_ram(Pico_mcd->prg_ram, "prg.bin"); + //dump_ram(Pico.ram, "ram.bin"); } -int PicoResetMCD(int hard) +PICO_INTERNAL int PicoResetMCD(int hard) { - // clear everything except BIOS - memset(Pico_mcd->prg_ram, 0, sizeof(mcd_state) - sizeof(Pico_mcd->bios)); - PicoMCD |= 2; // s68k reset pending + if (hard) { + int fmt_size = sizeof(formatted_bram); + memset(Pico_mcd->prg_ram, 0, sizeof(Pico_mcd->prg_ram)); + memset(Pico_mcd->word_ram2M, 0, sizeof(Pico_mcd->word_ram2M)); + memset(Pico_mcd->pcm_ram, 0, sizeof(Pico_mcd->pcm_ram)); + memset(Pico_mcd->bram, 0, sizeof(Pico_mcd->bram)); + memcpy(Pico_mcd->bram + sizeof(Pico_mcd->bram) - fmt_size, formatted_bram, fmt_size); + } + memset(Pico_mcd->s68k_regs, 0, sizeof(Pico_mcd->s68k_regs)); + memset(&Pico_mcd->pcm, 0, sizeof(Pico_mcd->pcm)); + memset(&Pico_mcd->m, 0, sizeof(Pico_mcd->m)); + + *(unsigned int *)(Pico_mcd->bios + 0x70) = 0xffffffff; // reset hint vector (simplest way to implement reg6) + Pico_mcd->m.state_flags |= 1; // s68k reset pending Pico_mcd->s68k_regs[3] = 1; // 2M word RAM mode with m68k access after reset - counter75hz = 0; - LC89510_Reset(); Reset_CD(); + LC89510_Reset(); + gfx_cd_reset(); + PicoMemResetCD(1); +#ifdef _ASM_CD_MEMORY_C + //PicoMemResetCDdecode(1); // don't have to call this in 2M mode +#endif + + // use SRam.data for RAM cart + if (SRam.data) free(SRam.data); + SRam.data = NULL; + if (PicoOpt&0x8000) + SRam.data = calloc(1, 0x12000); return 0; } -static __inline void SekRun(int cyc) +static __inline void SekRunM68k(int cyc) { int cyc_do; SekCycleAim+=cyc; - if((cyc_do=SekCycleAim-SekCycleCnt) < 0) return; -#if defined(EMU_M68K) - m68k_set_context(&PicoM68kCPU); + if ((cyc_do=SekCycleAim-SekCycleCnt) <= 0) return; +#if defined(EMU_CORE_DEBUG) + SekCycleCnt+=CM_compareRun(cyc_do, 0); +#elif defined(EMU_C68K) + PicoCpuCM68k.cycles=cyc_do; + CycloneRun(&PicoCpuCM68k); + SekCycleCnt+=cyc_do-PicoCpuCM68k.cycles; +#elif defined(EMU_M68K) + m68k_set_context(&PicoCpuMM68k); SekCycleCnt+=m68k_execute(cyc_do); +#elif defined(EMU_F68K) + g_m68kcontext=&PicoCpuFM68k; + SekCycleCnt+=fm68k_emulate(cyc_do); #endif } @@ -57,158 +107,155 @@ static __inline void SekRunS68k(int cyc) { int cyc_do; SekCycleAimS68k+=cyc; - if((cyc_do=SekCycleAimS68k-SekCycleCntS68k) < 0) return; -#if defined(EMU_M68K) - m68k_set_context(&PicoS68kCPU); + if ((cyc_do=SekCycleAimS68k-SekCycleCntS68k) <= 0) return; +#if defined(EMU_CORE_DEBUG) + SekCycleCntS68k+=CM_compareRun(cyc_do, 1); +#elif defined(EMU_C68K) + PicoCpuCS68k.cycles=cyc_do; + CycloneRun(&PicoCpuCS68k); + SekCycleCntS68k+=cyc_do-PicoCpuCS68k.cycles; +#elif defined(EMU_M68K) + m68k_set_context(&PicoCpuMS68k); SekCycleCntS68k+=m68k_execute(cyc_do); +#elif defined(EMU_F68K) + g_m68kcontext=&PicoCpuFS68k; + SekCycleCntS68k+=fm68k_emulate(cyc_do); #endif } -// TODO: tidy -extern unsigned char m68k_regs[0x40]; -extern unsigned char s68k_regs[0x200]; +#define PS_STEP_M68K ((488<<16)/20) // ~24 +//#define PS_STEP_S68K 13 -// Accurate but slower frame which does hints -static int PicoFrameHintsMCD(void) +#ifdef _ASM_CD_PICO_C +void SekRunPS(int cyc_m68k, int cyc_s68k); +#else +static __inline void SekRunPS(int cyc_m68k, int cyc_s68k) { - struct PicoVideo *pv=&Pico.video; - int total_z80=0,lines,y,lines_vis = 224,z80CycleAim = 0,line_sample,counter75hz_lim; - const int cycles_68k=488,cycles_z80=228,cycles_s68k=795; // both PAL and NTSC compile to same values - int skip=PicoSkipFrame || (PicoOpt&0x10); - int hint; // Hint counter - - 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 - lines = 312; // Steve Snake says there are 313 lines, but this seems to also work well - line_sample = 68; - counter75hz_lim = 2080; - 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 - lines = 262; - counter75hz_lim = 2096; - line_sample = 93; - } - - SekCyclesReset(); - SekCyclesResetS68k(); - //z80ExtraCycles = 0; + int cycn, cycn_s68k, cyc_do; + SekCycleAim+=cyc_m68k; + SekCycleAimS68k+=cyc_s68k; - if(PicoOpt&4) - z80CycleAim = 0; -// z80_resetCycles(); +// fprintf(stderr, "=== start %3i/%3i [%3i/%3i] {%05i.%i} ===\n", cyc_m68k, cyc_s68k, +// SekCycleAim-SekCycleCnt, SekCycleAimS68k-SekCycleCntS68k, Pico.m.frame_count, Pico.m.scanline); - pv->status&=~0x88; // clear V-Int, come out of vblank + /* loop 488 downto 0 in steps of PS_STEP */ + for (cycn = (488<<16)-PS_STEP_M68K; cycn >= 0; cycn -= PS_STEP_M68K) + { + cycn_s68k = (cycn + cycn/2 + cycn/8) >> 16; + if ((cyc_do = SekCycleAim-SekCycleCnt-(cycn>>16)) > 0) { +#if defined(EMU_C68K) + PicoCpuCM68k.cycles = cyc_do; + CycloneRun(&PicoCpuCM68k); + SekCycleCnt += cyc_do - PicoCpuCM68k.cycles; +#elif defined(EMU_M68K) + m68k_set_context(&PicoCpuMM68k); + SekCycleCnt += m68k_execute(cyc_do); +#elif defined(EMU_F68K) + g_m68kcontext = &PicoCpuFM68k; + SekCycleCnt += fm68k_emulate(cyc_do); +#endif + } + if ((cyc_do = SekCycleAimS68k-SekCycleCntS68k-cycn_s68k) > 0) { +#if defined(EMU_C68K) + PicoCpuCS68k.cycles = cyc_do; + CycloneRun(&PicoCpuCS68k); + SekCycleCntS68k += cyc_do - PicoCpuCS68k.cycles; +#elif defined(EMU_M68K) + m68k_set_context(&PicoCpuMS68k); + SekCycleCntS68k += m68k_execute(cyc_do); +#elif defined(EMU_F68K) + g_m68kcontext = &PicoCpuFS68k; + SekCycleCntS68k += fm68k_emulate(cyc_do); +#endif + } + } +} +#endif - hint=pv->reg[10]; // Load H-Int counter - //dprintf("-hint: %i", hint); - for (y=0;y 25) Pico.m.padTHPhase[0]=0; - if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0; - } + if (!(Pico_mcd->scd.Status_CDC & 0x08)) return; - // H-Interrupts: - if(y <= lines_vis && --hint < 0) // y <= lines_vis: Comix Zone, Golden Axe - { - //dprintf("rhint:old @ %06x", SekPc); - hint=pv->reg[10]; // Reload H-Int counter - pv->pending_ints|=0x10; - if (pv->reg[0]&0x10) SekInterrupt(4); - //dprintf("rhint: %i @ %06x [%i|%i]", hint, SekPc, y, SekCycleCnt); - //dprintf("hint_routine: %x", (*(unsigned short*)(Pico.ram+0x0B84)<<16)|*(unsigned short*)(Pico.ram+0x0B86)); - } + ddx = Pico_mcd->s68k_regs[4] & 7; + if (ddx < 2) return; // invalid + if (ddx < 4) { + Pico_mcd->s68k_regs[4] |= 0x40; // Data set ready in host port + return; + } + if (ddx == 6) return; // invalid - // V-Interrupt: - if (y == lines_vis) - { - //dprintf("vint: @ %06x [%i|%i]", SekPc, y, SekCycleCnt); - pv->status|=0x88; // V-Int happened, go into vblank - 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) - /*if(Pico.m.z80Run && (PicoOpt&4)) { - z80CycleAim+=cycles_z80/2; - total_z80+=z80_run(z80CycleAim-total_z80); - z80CycleAim-=cycles_z80/2; - }*/ - pv->pending_ints|=0x20; - if(pv->reg[1]&0x20) SekInterrupt(6); - if(Pico.m.z80Run && (PicoOpt&4)) // ? - z80_int(); - //dprintf("zint: [%i|%i] zPC=%04x", Pico.m.scanline, SekCyclesDone(), mz80GetRegisterValue(NULL, 0)); - } + Update_CDC_TRansfer(ddx); // now go and do the actual transfer +} - // decide if we draw this line -#if CAN_HANDLE_240_LINES - if(!skip && ((!(pv->reg[1]&8) && y<224) || ((pv->reg[1]&8) && y<240)) ) -#else - if(!skip && y<224) -#endif - PicoLine(y); - - if(PicoOpt&1) - sound_timers_and_dac(y); - - // get samples from sound chips - if(y == 32 && PsndOut) - emustatus &= ~1; - else if((y == 224 || y == line_sample) && PsndOut) - ;//getSamples(y); - - // Run scanline: - //dprintf("m68k starting exec @ %06x", SekPc); - if(Pico.m.dma_bytes) SekCycleCnt+=CheckDMA(); - SekRun(cycles_68k); - if ((Pico_mcd->m68k_regs[1]&3) == 1) { // no busreq/no reset -#if 0 - int i; - FILE *f = fopen("prg_ram.bin", "wb"); - for (i = 0; i < 0x80000; i+=2) - { - int tmp = Pico_mcd->prg_ram[i]; - Pico_mcd->prg_ram[i] = Pico_mcd->prg_ram[i+1]; - Pico_mcd->prg_ram[i+1] = tmp; - } - fwrite(Pico_mcd->prg_ram, 1, 0x80000, f); - fclose(f); - exit(1); +static __inline void update_chips(void) +{ + int counter_timer, int3_set; + int counter75hz_lim = Pico.m.pal ? 2080 : 2096; + + // 75Hz CDC update + if ((Pico_mcd->m.counter75hz+=10) >= counter75hz_lim) { + Pico_mcd->m.counter75hz -= counter75hz_lim; + Check_CD_Command(); + } + + // update timers + counter_timer = Pico.m.pal ? 0x21630 : 0x2121c; // 136752 : 135708; + Pico_mcd->m.timer_stopwatch += counter_timer; + if ((int3_set = Pico_mcd->s68k_regs[0x31])) { + Pico_mcd->m.timer_int3 -= counter_timer; + if (Pico_mcd->m.timer_int3 < 0) { + if (Pico_mcd->s68k_regs[0x33] & (1<<3)) { + elprintf(EL_INTS, "s68k: timer irq 3"); + SekInterruptS68k(3); + Pico_mcd->m.timer_int3 += int3_set << 16; + } + // is this really what happens if irq3 is masked out? + Pico_mcd->m.timer_int3 &= 0xffffff; + } + } + + // update gfx chip + if (Pico_mcd->rot_comp.Reg_58 & 0x8000) + gfx_cd_update(); + + // delayed setting of DMNA bit (needed for Silpheed) + if (Pico_mcd->m.state_flags & 2) { + Pico_mcd->m.state_flags &= ~2; + if (!(Pico_mcd->s68k_regs[3] & 4)) { + Pico_mcd->s68k_regs[3] |= 2; + Pico_mcd->s68k_regs[3] &= ~1; +#ifdef USE_POLL_DETECT + if ((s68k_poll_adclk&0xfe) == 2) { + SekSetStopS68k(0); s68k_poll_adclk = 0; + } #endif - //dprintf("s68k starting exec @ %06x", SekPcS68k); - SekRunS68k(cycles_s68k); - } + } + } +} - if((PicoOpt&4) && Pico.m.z80Run) { - Pico.m.z80Run|=2; - z80CycleAim+=cycles_z80; - total_z80+=z80_run(z80CycleAim-total_z80); - } - if ((counter75hz+=10) >= counter75hz_lim) { - counter75hz -= counter75hz_lim; - Check_CD_Command(); - } - } +static __inline void getSamples(int y) +{ + int len = PsndRender(0, PsndLen); + if (PicoWriteSound) PicoWriteSound(len); + // clear sound buffer + PsndClear(); +} - // draw a frame just after vblank in alternative render mode - if(!PicoSkipFrame && (PicoOpt&0x10)) - PicoFrameFull(); - return 0; -} +#define PICO_CD +#include "../PicoFrameHints.c" -int PicoFrameMCD(void) +PICO_INTERNAL int PicoFrameMCD(void) { if(!(PicoOpt&0x10)) PicoFrameStart(); - PicoFrameHintsMCD(); + PicoFrameHints(); return 0; }