-// common code for Pico.c and cd/Pico.c
-// (c) Copyright 2007-2009 Grazvydas "notaz" Ignotas
+/*
+ * common code for base/cd/32x
+ * (C) notaz, 2007-2009,2013
+ *
+ * This work is licensed under the terms of MAME license.
+ * See COPYING file in the top-level directory.
+ */
#define CYCLES_M68K_LINE 488 // suitable for both PAL/NTSC
#define CYCLES_M68K_VINT_LAG 68
-#define CYCLES_M68K_ASD 148
-#define CYCLES_S68K_LINE 795
-#define CYCLES_S68K_ASD 241
// pad delay (for 6 button pads)
-#define PAD_DELAY \
- if (PicoOpt&POPT_6BTN_PAD) { \
- if(Pico.m.padDelay[0]++ > 25) Pico.m.padTHPhase[0]=0; \
- if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0; \
- }
+#define PAD_DELAY() { \
+ if(Pico.m.padDelay[0]++ > 25) Pico.m.padTHPhase[0]=0; \
+ if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0; \
+}
// CPUS_RUN
-#ifndef RUN_SH2S
-#define RUN_SH2S
+#ifndef CPUS_RUN
+#define CPUS_RUN(m68k_cycles) \
+ SekRunM68k(m68k_cycles)
+#endif
+
+// sync m68k to SekCycleAim
+static void SekSyncM68k(void)
+{
+ int cyc_do;
+ pprof_start(m68k);
+ pevt_log_m68k_o(EVT_RUN_START);
+
+ while ((cyc_do = SekCycleAim - SekCycleCnt) > 0) {
+ SekCycleCnt += cyc_do;
+
+#if defined(EMU_C68K)
+ PicoCpuCM68k.cycles = cyc_do;
+ CycloneRun(&PicoCpuCM68k);
+ SekCycleCnt -= PicoCpuCM68k.cycles;
+#elif defined(EMU_M68K)
+ SekCycleCnt += m68k_execute(cyc_do) - cyc_do;
+#elif defined(EMU_F68K)
+ SekCycleCnt += fm68k_emulate(cyc_do, 0) - cyc_do;
#endif
+ }
-#ifndef PICO_CD
-#define CPUS_RUN(m68k_cycles,s68k_cycles) \
-{ \
- SekRunM68k(m68k_cycles); \
- RUN_SH2S \
+ SekCyclesLeft = 0;
+
+ SekTrace(0);
+ pevt_log_m68k_o(EVT_RUN_END);
+ pprof_end(m68k);
}
-#else
-#define CPUS_RUN(m68k_cycles,s68k_cycles) \
-{ \
- if ((PicoOpt&POPT_EN_MCD_PSYNC) && (Pico_mcd->m.busreq&3) == 1) { \
- SekRunPS(m68k_cycles, s68k_cycles); /* "better/perfect sync" */ \
- } else { \
- SekRunM68k(m68k_cycles); \
- if ((Pico_mcd->m.busreq&3) == 1) /* no busreq/no reset */ \
- SekRunS68k(s68k_cycles); \
- } \
+
+static inline void SekRunM68k(int cyc)
+{
+ SekCycleAim += cyc;
+ cyc = SekCycleAim - SekCycleCnt;
+ if (cyc <= 0)
+ return;
+ SekCycleCnt += cyc >> 6; // refresh slowdowns
+ SekSyncM68k();
+}
+
+static void do_hint(struct PicoVideo *pv)
+{
+ pv->pending_ints |= 0x10;
+ if (pv->reg[0] & 0x10) {
+ elprintf(EL_INTS, "hint: @ %06x [%u]", SekPc, SekCyclesDone());
+ SekInterrupt(4);
+ }
+}
+
+static void do_timing_hacks_as(struct PicoVideo *pv, int vdp_slots)
+{
+ pv->lwrite_cnt += vdp_slots - Pico.m.dma_xfers * 2; // wrong *2
+ if (pv->lwrite_cnt > vdp_slots)
+ pv->lwrite_cnt = vdp_slots;
+ else if (pv->lwrite_cnt < 0)
+ pv->lwrite_cnt = 0;
+ if (Pico.m.dma_xfers)
+ SekCyclesBurn(CheckDMA());
+}
+
+static void do_timing_hacks_vb(void)
+{
+ if (Pico.m.dma_xfers)
+ SekCyclesBurn(CheckDMA());
}
-#endif
static int PicoFrameHints(void)
{
- struct PicoVideo *pv=&Pico.video;
- int lines, y, lines_vis = 224, line_sample, skip, vcnt_wrap;
+ struct PicoVideo *pv = &Pico.video;
+ int line_sample = Pico.m.pal ? 68 : 93;
+ int vdp_slots = (Pico.video.reg[12] & 1) ? 18 : 16;
+ int lines, y, lines_vis, skip;
+ int vcnt_wrap, vcnt_adj;
+ unsigned int cycles;
int hint; // Hint counter
- pv->v_counter = Pico.m.scanline = 0;
+ pevt_log_m68k_o(EVT_FRAME_START);
if ((PicoOpt&POPT_ALT_RENDERER) && !PicoSkipFrame && (pv->reg[1]&0x40)) { // fast rend., display enabled
// draw a frame just after vblank in alternative render mode
}
else skip=PicoSkipFrame;
- if (Pico.m.pal) {
- line_sample = 68;
- if (pv->reg[1]&8) lines_vis = 240;
- } else {
- line_sample = 93;
- }
-
- SekCyclesReset();
+ timing.m68c_frame_start = SekCyclesDone();
+ pv->v_counter = Pico.m.scanline = 0;
z80_resetCycles();
-#ifdef PICO_CD
- SekCyclesResetS68k();
-#endif
- PsndDacLine = 0;
- emustatus &= ~1;
-
- pv->status&=~0x88; // clear V-Int, come out of vblank
+ PsndStartFrame();
- hint=pv->reg[10]; // Load H-Int counter
- //dprintf("-hint: %i", hint);
+ // Load H-Int counter
+ hint = (pv->status & PVS_ACTIVE) ? pv->hint_cnt : pv->reg[10];
- // This is to make active scan longer (needed for Double Dragon 2, mainly)
- CPUS_RUN(CYCLES_M68K_ASD, CYCLES_S68K_ASD);
+ pv->status |= PVS_ACTIVE;
- for (y = 0; y < lines_vis; y++)
+ for (y = 0; ; y++)
{
pv->v_counter = Pico.m.scanline = y;
if ((pv->reg[12]&6) == 6) { // interlace mode 2
pv->v_counter &= 0xff;
}
- // VDP FIFO
- pv->lwrite_cnt -= 12;
- if (pv->lwrite_cnt <= 0) {
- pv->lwrite_cnt=0;
- Pico.video.status|=0x200;
- }
+ if ((y == 224 && !(pv->reg[1] & 8)) || y == 240)
+ break;
- PAD_DELAY
-#ifdef PICO_CD
- check_cd_dma();
-#endif
-#ifdef PICO_32X
- p32x_pwm_irq_check();
-#endif
+ PAD_DELAY();
// H-Interrupts:
- if (--hint < 0) // y <= lines_vis: Comix Zone, Golden Axe
+ if (--hint < 0)
{
- hint=pv->reg[10]; // Reload H-Int counter
- pv->pending_ints|=0x10;
- if (pv->reg[0]&0x10) {
- elprintf(EL_INTS, "hint: @ %06x [%i]", SekPc, SekCycleCnt);
- SekInterrupt(4);
- }
+ hint = pv->reg[10]; // Reload H-Int counter
+ do_hint(pv);
}
// decide if we draw this line
// get samples from sound chips
if ((y == 224 || y == line_sample) && PsndOut)
{
+ cycles = SekCyclesDone();
+
if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80))
- PicoSyncZ80(SekCycleCnt);
- if (ym2612.dacen && PsndDacLine <= y)
- PsndDoDAC(y);
+ PicoSyncZ80(cycles);
+#ifdef PICO_CD
+ if (PicoAHW & PAHW_MCD)
+ pcd_sync_s68k(cycles, 0);
+#endif
+#ifdef PICO_32X
+ p32x_sync_sh2s(cycles);
+#endif
PsndGetSamples(y);
}
// Run scanline:
- if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
- CPUS_RUN(CYCLES_M68K_LINE, CYCLES_S68K_LINE);
+ line_base_cycles = SekCyclesDone();
+ do_timing_hacks_as(pv, vdp_slots);
+ CPUS_RUN(CYCLES_M68K_LINE);
-#ifdef PICO_CD
- update_chips();
-#else
if (PicoLineHook) PicoLineHook();
-#endif
+ pevt_log_m68k_o(EVT_NEXT_LINE);
}
+ lines_vis = (pv->reg[1] & 8) ? 240 : 224;
+ if (y == lines_vis)
+ pv->status &= ~PVS_ACTIVE;
+
if (!skip)
{
- if (DrawScanline < y)
+ if (Pico.est.DrawScanline < y)
PicoDrawSync(y - 1, 0);
#ifdef DRAW_FINISH_FUNC
DRAW_FINISH_FUNC();
#endif
}
- // V-int line (224 or 240)
- Pico.m.scanline = y;
- pv->v_counter = 0xe0; // bad for 240 mode
- if ((pv->reg[12]&6) == 6) pv->v_counter = 0xc1;
-
// VDP FIFO
- pv->lwrite_cnt=0;
- Pico.video.status|=0x200;
+ pv->lwrite_cnt = 0;
+ Pico.video.status |= SR_EMPT;
memcpy(PicoPadInt, PicoPad, sizeof(PicoPadInt));
- PAD_DELAY
-#ifdef PICO_CD
- check_cd_dma();
-#endif
-#ifdef PICO_32X
- p32x_pwm_irq_check();
-#endif
+ PAD_DELAY();
- // Last H-Int:
+ // Last H-Int (normally):
if (--hint < 0)
{
- hint=pv->reg[10]; // Reload H-Int counter
- pv->pending_ints|=0x10;
- //printf("rhint: %i @ %06x [%i|%i]\n", hint, SekPc, y, SekCycleCnt);
- if (pv->reg[0]&0x10) SekInterrupt(4);
+ hint = pv->reg[10]; // Reload H-Int counter
+ do_hint(pv);
}
- pv->status|=0x08; // go into vblank
- pv->pending_ints|=0x20;
-
-#ifdef PICO_32X
- p32x_start_blank();
-#endif
+ pv->status |= SR_VB; // go into vblank
+ pv->pending_ints |= 0x20;
// the following SekRun is there for several reasons:
// there must be a delay after vblank bit is set and irq is asserted (Mazin Saga)
// also delay between F bit (bit 7) is set in SR and IRQ happens (Ex-Mutants)
// also delay between last H-int and V-int (Golden Axe 3)
- SekRunM68k(CYCLES_M68K_VINT_LAG);
+ line_base_cycles = SekCyclesDone();
+ do_timing_hacks_vb();
+ CPUS_RUN(CYCLES_M68K_VINT_LAG);
- if (pv->reg[1]&0x20) {
- elprintf(EL_INTS, "vint: @ %06x [%i]", SekPc, SekCycleCnt);
+ if (pv->reg[1] & 0x20) {
+ elprintf(EL_INTS, "vint: @ %06x [%u]", SekPc, SekCyclesDone());
SekInterrupt(6);
}
+
+ cycles = SekCyclesDone();
if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80)) {
- PicoSyncZ80(SekCycleCnt);
+ PicoSyncZ80(cycles);
elprintf(EL_INTS, "zint");
z80_int();
}
+#ifdef PICO_CD
+ if (PicoAHW & PAHW_MCD)
+ pcd_sync_s68k(cycles, 0);
+#endif
+#ifdef PICO_32X
+ p32x_sync_sh2s(cycles);
+ p32x_start_blank();
+#endif
+
// get samples from sound chips
if (y == 224 && PsndOut)
- {
- if (ym2612.dacen && PsndDacLine <= y)
- PsndDoDAC(y);
PsndGetSamples(y);
- }
// Run scanline:
- if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
- CPUS_RUN(CYCLES_M68K_LINE - CYCLES_M68K_VINT_LAG - CYCLES_M68K_ASD,
- CYCLES_S68K_LINE - CYCLES_S68K_ASD);
+ CPUS_RUN(CYCLES_M68K_LINE - CYCLES_M68K_VINT_LAG);
-#ifdef PICO_CD
- update_chips();
-#else
if (PicoLineHook) PicoLineHook();
-#endif
+ pevt_log_m68k_o(EVT_NEXT_LINE);
- lines = scanlines_total;
- vcnt_wrap = Pico.m.pal ? 0x103 : 0xEB; // based on Gens, TODO: verify
+ if (Pico.m.pal) {
+ lines = 313;
+ vcnt_wrap = 0x103;
+ vcnt_adj = 57;
+ }
+ else {
+ lines = 262;
+ vcnt_wrap = 0xEB;
+ vcnt_adj = 6;
+ }
- for (y++; y < lines; y++)
+ for (y++; y < lines - 1; y++)
{
pv->v_counter = Pico.m.scanline = y;
if (y >= vcnt_wrap)
- pv->v_counter -= Pico.m.pal ? 56 : 6;
+ pv->v_counter -= vcnt_adj;
if ((pv->reg[12]&6) == 6)
pv->v_counter = (pv->v_counter << 1) | 1;
pv->v_counter &= 0xff;
- PAD_DELAY
-#ifdef PICO_CD
- check_cd_dma();
-#endif
-#ifdef PICO_32X
- p32x_pwm_irq_check();
-#endif
+ PAD_DELAY();
+
+ if ((pv->status & PVS_ACTIVE) && --hint < 0)
+ {
+ hint = pv->reg[10]; // Reload H-Int counter
+ do_hint(pv);
+ }
// Run scanline:
- if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
- CPUS_RUN(CYCLES_M68K_LINE, CYCLES_S68K_LINE);
+ line_base_cycles = SekCyclesDone();
+ do_timing_hacks_vb();
+ CPUS_RUN(CYCLES_M68K_LINE);
-#ifdef PICO_CD
- update_chips();
-#else
if (PicoLineHook) PicoLineHook();
-#endif
+ pevt_log_m68k_o(EVT_NEXT_LINE);
+ }
+
+ pv->status &= ~SR_VB;
+
+ // last scanline
+ Pico.m.scanline = y;
+ pv->v_counter = 0xff;
+ pv->lwrite_cnt = 0;
+
+ PAD_DELAY();
+
+ if ((pv->status & PVS_ACTIVE) && --hint < 0)
+ {
+ hint = pv->reg[10]; // Reload H-Int counter
+ do_hint(pv);
}
- // sync z80
+ // Run scanline:
+ line_base_cycles = SekCyclesDone();
+ do_timing_hacks_as(pv, vdp_slots);
+ CPUS_RUN(CYCLES_M68K_LINE);
+
+ if (PicoLineHook) PicoLineHook();
+ pevt_log_m68k_o(EVT_NEXT_LINE);
+
+ // sync cpus
+ cycles = SekCyclesDone();
if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80))
- PicoSyncZ80(Pico.m.pal ? 151809 : 127671); // cycles adjusted for converter
- if (PsndOut && ym2612.dacen && PsndDacLine <= lines-1)
- PsndDoDAC(lines-1);
+ PicoSyncZ80(cycles);
+ if (PsndOut && ym2612.dacen && PsndDacLine < lines)
+ PsndDoDAC(lines - 1);
+ if (PsndOut && PsndPsgLine < lines)
+ PsndDoPSG(lines - 1);
+#ifdef PICO_CD
+ if (PicoAHW & PAHW_MCD)
+ pcd_sync_s68k(cycles, 0);
+#endif
+#ifdef PICO_32X
+ p32x_sync_sh2s(cycles);
+#endif
timers_cycle();
+ pv->hint_cnt = hint;
+
return 0;
}
#undef PAD_DELAY
#undef CPUS_RUN
+// vim:shiftwidth=2:ts=2:expandtab
notaz.gp2x.de / picodrive.git / blobdiff