32x: improve 'simple' scheduling, works for 'interesting' games

[picodrive.git] / pico / pico_cmn.c

diff --git a/pico/pico_cmn.c b/pico/pico_cmn.c
index cc77f5f..d256f72 100644 (file)
--- a/pico/pico_cmn.c
+++ b/pico/pico_cmn.c
@@ -1,10 +1,11 @@
 // common code for Pico.c and cd/Pico.c
-// (c) Copyright 2007,2008 Grazvydas "notaz" Ignotas
+// (c) Copyright 2007-2009 Grazvydas "notaz" Ignotas
 
 #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)
@@ -15,23 +16,11 @@
   }
 
 // CPUS_RUN
-#ifndef PICO_CD
+#ifndef CPUS_RUN
 #define CPUS_RUN(m68k_cycles,s68k_cycles) \
-    SekRunM68k(m68k_cycles);
-#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); \
-    } \
-}
+  SekRunM68k(m68k_cycles)
 #endif
 
-// Accurate but slower frame which does hints
 static int PicoFrameHints(void)
 {
   struct PicoVideo *pv=&Pico.video;
@@ -64,6 +53,7 @@ static int PicoFrameHints(void)
   SekCyclesResetS68k();
 #endif
   PsndDacLine = 0;
+  emustatus &= ~1;
 
   pv->status&=~0x88; // clear V-Int, come out of vblank
 
@@ -93,6 +83,9 @@ static int PicoFrameHints(void)
 #ifdef PICO_CD
     check_cd_dma();
 #endif
+#ifdef PICO_32X
+    p32x_pwm_irq_check(1);
+#endif
 
     // H-Interrupts:
     if (--hint < 0) // y <= lines_vis: Comix Zone, Golden Axe
@@ -118,19 +111,15 @@ static int PicoFrameHints(void)
       }
     }
 
-#ifndef PICO_CD
     // get samples from sound chips
-    if (y == 32 && PsndOut)
-      emustatus &= ~1;
-    else if ((y == 224 || y == line_sample) && PsndOut)
+    if ((y == 224 || y == line_sample) && PsndOut)
     {
       if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80))
         PicoSyncZ80(SekCycleCnt);
       if (ym2612.dacen && PsndDacLine <= y)
         PsndDoDAC(y);
-      getSamples(y);
+      PsndGetSamples(y);
     }
-#endif
 
     // Run scanline:
     if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
@@ -166,6 +155,9 @@ static int PicoFrameHints(void)
 #ifdef PICO_CD
   check_cd_dma();
 #endif
+#ifdef PICO_32X
+  p32x_pwm_irq_check(1);
+#endif
 
   // Last H-Int:
   if (--hint < 0)
@@ -179,11 +171,15 @@ 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);
@@ -196,20 +192,17 @@ static int PicoFrameHints(void)
   }
 
   // get samples from sound chips
-#ifndef PICO_CD
-  if (y == 224)
-#endif
-    if (PsndOut)
-    {
-      if (ym2612.dacen && PsndDacLine <= y)
-        PsndDoDAC(y);
-      getSamples(y);
-    }
+  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);
+    CYCLES_S68K_LINE - CYCLES_S68K_VINT_LAG - CYCLES_S68K_ASD);
 
 #ifdef PICO_CD
   update_chips();
@@ -217,9 +210,8 @@ static int PicoFrameHints(void)
   if (PicoLineHook) PicoLineHook();
 #endif
 
-  // PAL line count might actually be 313 according to Steve Snake, but that would complicate things.
-  lines = Pico.m.pal ? 312 : 262;
-  vcnt_wrap = Pico.m.pal ? 0x103 : 0xEB; // based on Gens
+  lines = scanlines_total;
+  vcnt_wrap = Pico.m.pal ? 0x103 : 0xEB; // based on Gens, TODO: verify
 
   for (y++; y < lines; y++)
   {
@@ -234,6 +226,9 @@ static int PicoFrameHints(void)
 #ifdef PICO_CD
     check_cd_dma();
 #endif
+#ifdef PICO_32X
+    p32x_pwm_irq_check(1);
+#endif
 
     // Run scanline:
     if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());