clarify PicoDrive's license

[picodrive.git] / pico / pico_cmn.c

diff --git a/pico/pico_cmn.c b/pico/pico_cmn.c
index 212ed8d..8499f93 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)
@@ -15,27 +21,9 @@
   }
 
 // CPUS_RUN
-#ifndef RUN_SH2S
-#define RUN_SH2S
-#endif
-
-#ifndef PICO_CD
-#define CPUS_RUN(m68k_cycles,s68k_cycles) \
-{ \
-    SekRunM68k(m68k_cycles); \
-    RUN_SH2S \
-}
-#else
+#ifndef CPUS_RUN
 #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
 
 static int PicoFrameHints(void)
@@ -100,6 +88,9 @@ static int PicoFrameHints(void)
 #ifdef PICO_CD
     check_cd_dma();
 #endif
+#ifdef PICO_32X
+    p32x_timers_do(1);
+#endif
 
     // H-Interrupts:
     if (--hint < 0) // y <= lines_vis: Comix Zone, Golden Axe
@@ -169,6 +160,9 @@ static int PicoFrameHints(void)
 #ifdef PICO_CD
   check_cd_dma();
 #endif
+#ifdef PICO_32X
+  p32x_timers_do(1);
+#endif
 
   // Last H-Int:
   if (--hint < 0)
@@ -190,7 +184,7 @@ static int PicoFrameHints(void)
   // 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);
@@ -213,7 +207,7 @@ 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();
@@ -221,9 +215,8 @@ 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++)
   {
@@ -238,6 +231,9 @@ static int PicoFrameHints(void)
 #ifdef PICO_CD
     check_cd_dma();
 #endif
+#ifdef PICO_32X
+    p32x_timers_do(1);
+#endif
 
     // Run scanline:
     if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());