// (c) Copyright 2007 notaz, All rights reserved. #include "../PicoInt.h" 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; \ } \ } PICO_INTERNAL int PicoInitMCD(void) { SekInitS68k(); Init_CD_Driver(); return 0; } PICO_INTERNAL void PicoExitMCD(void) { End_CD_Driver(); //dump_ram(Pico_mcd->prg_ram, "prg.bin"); //dump_ram(Pico.ram, "ram.bin"); } PICO_INTERNAL int PicoResetMCD(int hard) { 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 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 SekRunM68k(int cyc) { int cyc_do; SekCycleAim+=cyc; if((cyc_do=SekCycleAim-SekCycleCnt) < 0) return; #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 } static __inline void SekRunS68k(int cyc) { int cyc_do; SekCycleAimS68k+=cyc; if((cyc_do=SekCycleAimS68k-SekCycleCntS68k) < 0) return; #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 } #define PS_STEP_M68K ((488<<16)/20) // ~24 //#define PS_STEP_S68K 13 #ifdef _ASM_CD_PICO_C void SekRunPS(int cyc_m68k, int cyc_s68k); #else static __inline void SekRunPS(int cyc_m68k, int cyc_s68k) { int cycn, cycn_s68k, cyc_do; SekCycleAim+=cyc_m68k; SekCycleAimS68k+=cyc_s68k; // 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); /* 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 static __inline void check_cd_dma(void) { int ddx; if (!(Pico_mcd->scd.Status_CDC & 0x08)) return; 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 Update_CDC_TRansfer(ddx); // now go and do the actual transfer } 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 } } } static __inline void getSamples(int y) { int len = PsndRender(0, PsndLen); if (PicoWriteSound) PicoWriteSound(len); // clear sound buffer PsndClear(); } #define PICO_CD #include "../PicoFrameHints.c" PICO_INTERNAL int PicoFrameMCD(void) { if(!(PicoOpt&0x10)) PicoFrameStart(); PicoFrameHints(); return 0; }