-// 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();
}
-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));
+ 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)
- PicoMCD |= 2; // s68k reset pending
+ 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);
+ SRam.start = SRam.end = 0; // unused
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, 0);
#endif
}
{
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, 0);
#endif
}
+#define PS_STEP_M68K ((488<<16)/20) // ~24
+//#define PS_STEP_S68K 13
+
+#if defined(_ASM_CD_PICO_C)
+extern void SekRunPS(int cyc_m68k, int cyc_s68k);
+#elif defined(EMU_F68K)
+static __inline void SekRunPS(int cyc_m68k, int cyc_s68k)
+{
+ SekCycleAim+=cyc_m68k;
+ SekCycleAimS68k+=cyc_s68k;
+ fm68k_emulate(0, 1);
+}
+#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, 0);
+#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, 0);
+#endif
+ }
+ }
+}
+#endif
+
+
static __inline void check_cd_dma(void)
{
int ddx;
Update_CDC_TRansfer(ddx); // now go and do the actual transfer
}
-
-// Accurate but slower frame which does hints
-static int PicoFrameHintsMCD(void)
+static __inline void update_chips(void)
{
- 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;
-
- if(PicoOpt&4)
- z80CycleAim = 0;
-// z80_resetCycles();
-
- pv->status&=~0x88; // clear V-Int, come out of vblank
-
- hint=pv->reg[10]; // Load H-Int counter
- //dprintf("-hint: %i", hint);
-
- for (y=0;y<lines;y++)
- {
- Pico.m.scanline=(short)y;
-
- // pad delay (for 6 button pads)
- if(PicoOpt&0x20) {
- if(Pico.m.padDelay[0]++ > 25) Pico.m.padTHPhase[0]=0;
- if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0;
- }
+ int counter_timer, int3_set;
+ int counter75hz_lim = Pico.m.pal ? 2080 : 2096;
- check_cd_dma();
-
- // 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));
- }
+ // 75Hz CDC update
+ if ((Pico_mcd->m.counter75hz+=10) >= counter75hz_lim) {
+ Pico_mcd->m.counter75hz -= counter75hz_lim;
+ Check_CD_Command();
+ }
- // 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 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;
+ }
+ }
- // 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->m.busreq&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);
+ // 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();
- }
-
- if (Pico_mcd->rot_comp.Reg_58 & 0x8000)
- gfx_cd_update();
- }
+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;
}
notaz.gp2x.de / picodrive.git / blobdiff