32x: add preliminary hint emulation

[picodrive.git] / pico / pico_cmn.c

diff --git a/pico/pico_cmn.c b/pico/pico_cmn.c
index d2801ed..2b558c1 100644 (file)
--- a/pico/pico_cmn.c
+++ b/pico/pico_cmn.c
@@ -1,10 +1,16 @@
-// common code for Pico.c and cd/Pico.c
-// (c) Copyright 2007-2009 Grazvydas "notaz" Ignotas
+/*
+ * common code for pico.c and cd/pico.c
+ * (C) notaz, 2007-2009
+ *
+ * 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_VINT_LAG 111
 #define CYCLES_S68K_ASD      241
 
 // pad delay (for 6 button pads)
@@ -15,35 +21,47 @@
   }
 
 // CPUS_RUN
-#ifndef RUN_SH2S
-#define RUN_SH2S
+#ifndef CPUS_RUN
+#define CPUS_RUN(m68k_cycles,s68k_cycles) \
+  SekRunM68k(m68k_cycles)
 #endif
 
-#ifndef PICO_CD
-#define CPUS_RUN(m68k_cycles,s68k_cycles) \
-{ \
-    SekRunM68k(m68k_cycles); \
-    RUN_SH2S \
-}
-#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)
+{
+  int cyc_do;
+  pprof_start(m68k);
+  pevt_log_m68k_o(EVT_RUN_START);
+
+  SekCycleAim+=cyc;
+  if ((cyc_do=SekCycleAim-SekCycleCnt) <= 0)
+    goto out;
+
+#if defined(EMU_CORE_DEBUG)
+  // this means we do run-compare
+  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)
+  SekCycleCnt+=m68k_execute(cyc_do);
+#elif defined(EMU_F68K)
+  SekCycleCnt+=fm68k_emulate(cyc_do, 0, 0);
 #endif
 
+out:
+  SekTrace(0);
+  pevt_log_m68k_o(EVT_RUN_END);
+  pprof_end(m68k);
+}
+
 static int PicoFrameHints(void)
 {
   struct PicoVideo *pv=&Pico.video;
   int lines, y, lines_vis = 224, line_sample, skip, vcnt_wrap;
   int hint; // Hint counter
 
+  pevt_log_m68k_o(EVT_FRAME_START);
   pv->v_counter = Pico.m.scanline = 0;
 
   if ((PicoOpt&POPT_ALT_RENDERER) && !PicoSkipFrame && (pv->reg[1]&0x40)) { // fast rend., display enabled
@@ -132,6 +150,9 @@ static int PicoFrameHints(void)
         PicoSyncZ80(SekCycleCnt);
       if (ym2612.dacen && PsndDacLine <= y)
         PsndDoDAC(y);
+#ifdef PICO_32X
+      p32x_sync_sh2s(SekCyclesDoneT2());
+#endif
       PsndGetSamples(y);
     }
 
@@ -144,6 +165,7 @@ static int PicoFrameHints(void)
 #else
     if (PicoLineHook) PicoLineHook();
 #endif
+    pevt_log_m68k_o(EVT_NEXT_LINE);
   }
 
   if (!skip)
@@ -182,15 +204,11 @@ static int PicoFrameHints(void)
   pv->status|=0x08; // go into vblank
   pv->pending_ints|=0x20;
 
-#ifdef PICO_32X
-  p32x_start_blank();
-#endif
-
   // 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);
+  CPUS_RUN(CYCLES_M68K_VINT_LAG, CYCLES_S68K_VINT_LAG);
 
   if (pv->reg[1]&0x20) {
     elprintf(EL_INTS, "vint: @ %06x [%i]", SekPc, SekCycleCnt);
@@ -202,6 +220,11 @@ static int PicoFrameHints(void)
     z80_int();
   }
 
+#ifdef PICO_32X
+  p32x_sync_sh2s(SekCyclesDoneT2());
+  p32x_start_blank();
+#endif
+
   // get samples from sound chips
   if (y == 224 && PsndOut)
   {
@@ -213,13 +236,14 @@ static int PicoFrameHints(void)
   // 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);
+    CYCLES_S68K_LINE - CYCLES_S68K_VINT_LAG - CYCLES_S68K_ASD);
 
 #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
@@ -247,6 +271,7 @@ static int PicoFrameHints(void)
 #else
     if (PicoLineHook) PicoLineHook();
 #endif
+    pevt_log_m68k_o(EVT_NEXT_LINE);
   }
 
   // sync z80
@@ -255,6 +280,9 @@ static int PicoFrameHints(void)
   if (PsndOut && ym2612.dacen && PsndDacLine <= lines-1)
     PsndDoDAC(lines-1);
 
+#ifdef PICO_32X
+  p32x_sync_sh2s(SekCyclesDoneT2());
+#endif
   timers_cycle();
 
   return 0;