-// 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();
+#ifdef _ASM_CD_MEMORY_C
+ PicoMemResetCD(1);
+ //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)
+#if defined(EMU_C68K)
+ PicoCpu.cycles=cyc_do;
+ CycloneRun(&PicoCpu);
+ SekCycleCnt+=cyc_do-PicoCpu.cycles;
+#elif defined(EMU_M68K)
m68k_set_context(&PicoM68kCPU);
SekCycleCnt+=m68k_execute(cyc_do);
#endif
int cyc_do;
SekCycleAimS68k+=cyc;
if((cyc_do=SekCycleAimS68k-SekCycleCntS68k) < 0) return;
-#if defined(EMU_M68K)
+#if defined(EMU_C68K)
+ PicoCpuS68k.cycles=cyc_do;
+ CycloneRun(&PicoCpuS68k);
+ SekCycleCntS68k+=cyc_do-PicoCpuS68k.cycles;
+#elif defined(EMU_M68K)
m68k_set_context(&PicoS68kCPU);
SekCycleCntS68k+=m68k_execute(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;
+ int d_cm = 0, d_cs = 0, ex;
+ 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)
+ {
+ ex = 0;
+ cycn_s68k = (cycn + cycn/2 + cycn/8) >> 16;
+//fprintf(stderr, "%3i/%3i: ", cycn>>16, cycn_s68k);
+ if ((cyc_do = SekCycleAim-SekCycleCnt-(cycn>>16)) > 0) {
+#if defined(EMU_C68K)
+ PicoCpu.cycles = cyc_do;
+ CycloneRun(&PicoCpu);
+ SekCycleCnt += cyc_do - PicoCpu.cycles;
+#elif defined(EMU_M68K)
+ m68k_set_context(&PicoM68kCPU);
+ SekCycleCnt += (ex = m68k_execute(cyc_do));
+#endif
+ }
+//fprintf(stderr, "%3i ", ex); d_cm += ex; ex = 0;
+ if ((cyc_do = SekCycleAimS68k-SekCycleCntS68k-cycn_s68k) > 0) {
+#if defined(EMU_C68K)
+ PicoCpuS68k.cycles = cyc_do;
+ CycloneRun(&PicoCpuS68k);
+ SekCycleCntS68k += cyc_do - PicoCpuS68k.cycles;
+#elif defined(EMU_M68K)
+ m68k_set_context(&PicoS68kCPU);
+ SekCycleCntS68k += (ex = m68k_execute(cyc_do));
+#endif
+ }
+//fprintf(stderr, "%3i\n", ex); d_cs += ex;
+ }
+
+//fprintf(stderr, "== end %3i/%3i ==\n", d_cm, d_cs);
+}
+#endif
+
+
static __inline void check_cd_dma(void)
{
int ddx;
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)) {
+ dprintf("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
+ }
+ }
+}
+
-// Accurate but slower frame which does hints
static int PicoFrameHintsMCD(void)
{
struct PicoVideo *pv=&Pico.video;
- int total_z80=0,lines,y,lines_vis = 224,z80CycleAim = 0,line_sample,counter75hz_lim;
+ int total_z80=0,lines,y,lines_vis = 224,z80CycleAim = 0,line_sample;
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
//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;
}
{
//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)
+ SekRunM68k(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);
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);
+ if (y == 224 && PsndOut) {
+ int len = sound_render(0, PsndLen);
+ if (PicoWriteSound) PicoWriteSound(len);
+ // clear sound buffer
+ sound_clear();
+ }
// 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);
-#endif
- //dprintf("s68k starting exec @ %06x", SekPcS68k);
- SekRunS68k(cycles_s68k);
+ if (Pico.m.dma_bytes) SekCycleCnt+=CheckDMA();
+ if ((PicoOpt & 0x2000) && (Pico_mcd->m.busreq&3) == 1) {
+ SekRunPS(cycles_68k, cycles_s68k); // "better/perfect sync"
+ } else {
+ SekRunM68k(cycles_68k);
+ if ((Pico_mcd->m.busreq&3) == 1) // no busreq/no reset
+ SekRunS68k(cycles_s68k);
}
- if((PicoOpt&4) && Pico.m.z80Run) {
- Pico.m.z80Run|=2;
- z80CycleAim+=cycles_z80;
+ if ((PicoOpt&4) && Pico.m.z80Run) {
+ if (Pico.m.z80Run & 2) z80CycleAim+=cycles_z80;
+ else {
+ int cnt = SekCyclesDone() - z80startCycle;
+ cnt = (cnt>>1)-(cnt>>5);
+ //if (cnt > cycles_z80) printf("FIXME: z80 cycles: %i\n", cnt);
+ if (cnt > cycles_z80) cnt = cycles_z80;
+ Pico.m.z80Run |= 2;
+ z80CycleAim+=cnt;
+ }
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();
+ update_chips();
}
// draw a frame just after vblank in alternative render mode
- if(!PicoSkipFrame && (PicoOpt&0x10))
+ if (!PicoSkipFrame && (PicoOpt&0x10))
PicoFrameFull();
return 0;
}
-int PicoFrameMCD(void)
+PICO_INTERNAL int PicoFrameMCD(void)
{
if(!(PicoOpt&0x10))
PicoFrameStart();
notaz.gp2x.de / picodrive.git / blobdiff