-// 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"
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)
{
- 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));
if (hard) {
- int fmt_size = sizeof(formatted_bram);
- memset(Pico_mcd->bram, 0, sizeof(Pico_mcd->bram));
- memcpy(Pico_mcd->bram + sizeof(Pico_mcd->bram) - fmt_size, formatted_bram, fmt_size);
+ 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 |= 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
- Pico_mcd->m.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;
#define PS_STEP_M68K ((488<<16)/20) // ~24
//#define PS_STEP_S68K 13
-#ifndef _ASM_CD_PICO_C
+#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;
//fprintf(stderr, "== end %3i/%3i ==\n", d_cm, d_cs);
}
-#else
-void SekRunPS(int cyc_m68k, int cyc_s68k);
#endif
// 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("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);
// Run scanline:
//dprintf("m68k starting exec @ %06x", SekPc);
- if(Pico.m.dma_bytes) SekCycleCnt+=CheckDMA();
- if((PicoOpt & 0x2000) && (Pico_mcd->m.busreq&3) == 1) {
+ 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 {
- SekRun(cycles_68k);
+ 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);
}
}
// 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