32x: improved lockstep mode, allows compatibility over 50%

[picodrive.git] / pico / pico_cmn.c

diff --git a/pico/pico_cmn.c b/pico/pico_cmn.c
index 368b4c8..5f31694 100644 (file)
--- a/pico/pico_cmn.c
+++ b/pico/pico_cmn.c
@@ -1,5 +1,5 @@
 // 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
@@ -15,23 +15,11 @@
   }
 
 // 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;
@@ -94,6 +82,9 @@ 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
@@ -163,6 +154,9 @@ 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)
@@ -176,6 +170,10 @@ 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)
@@ -211,9 +209,8 @@ 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++)
   {
@@ -228,6 +225,9 @@ 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());