clean up dac code a bit

[picodrive.git] / pico / pico_cmn.c

diff --git a/pico/pico_cmn.c b/pico/pico_cmn.c
index 98dfa93..b39cfdb 100644 (file)
--- a/pico/pico_cmn.c
+++ b/pico/pico_cmn.c
@@ -1,6 +1,6 @@
 /*
- * common code for pico.c and cd/pico.c
- * (C) notaz, 2007-2009
+ * 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.
@@ -22,13 +22,13 @@
   SekRunM68k(m68k_cycles)
 #endif
 
-static __inline void SekRunM68k(int cyc)
+// sync m68k to SekCycleAim
+static void SekSyncM68k(void)
 {
   int cyc_do;
   pprof_start(m68k);
   pevt_log_m68k_o(EVT_RUN_START);
 
-  SekCycleAim += cyc;
   while ((cyc_do = SekCycleAim - SekCycleCnt) > 0) {
     SekCycleCnt += cyc_do;
 
@@ -39,7 +39,7 @@ static __inline void SekRunM68k(int cyc)
 #elif defined(EMU_M68K)
     SekCycleCnt += m68k_execute(cyc_do) - cyc_do;
 #elif defined(EMU_F68K)
-    SekCycleCnt += fm68k_emulate(cyc_do, 0, 0) - cyc_do;
+    SekCycleCnt += fm68k_emulate(cyc_do, 0) - cyc_do;
 #endif
   }
 
@@ -50,6 +50,12 @@ static __inline void SekRunM68k(int cyc)
   pprof_end(m68k);
 }
 
+static inline void SekRunM68k(int cyc)
+{
+  SekCycleAim += cyc;
+  SekSyncM68k();
+}
+
 static int PicoFrameHints(void)
 {
   struct PicoVideo *pv=&Pico.video;
@@ -79,8 +85,7 @@ static int PicoFrameHints(void)
   }
 
   z80_resetCycles();
-  PsndDacLine = 0;
-  emustatus &= ~1;
+  PsndStartFrame();
 
   pv->status&=~0x88; // clear V-Int, come out of vblank
 
@@ -139,10 +144,9 @@ static int PicoFrameHints(void)
 
       if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80))
         PicoSyncZ80(cycles);
-      if (ym2612.dacen && PsndDacLine <= y)
-        PsndDoDAC(y);
 #ifdef PICO_CD
-      pcd_sync_s68k(cycles);
+      if (PicoAHW & PAHW_MCD)
+        pcd_sync_s68k(cycles, 0);
 #endif
 #ifdef PICO_32X
       p32x_sync_sh2s(cycles);
@@ -151,6 +155,7 @@ static int PicoFrameHints(void)
     }
 
     // Run scanline:
+    line_base_cycles = SekCyclesDone();
     if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
     CPUS_RUN(CYCLES_M68K_LINE);
 
@@ -160,7 +165,7 @@ static int PicoFrameHints(void)
 
   if (!skip)
   {
-    if (DrawScanline < y)
+    if (Pico.est.DrawScanline < y)
       PicoDrawSync(y - 1, 0);
 #ifdef DRAW_FINISH_FUNC
     DRAW_FINISH_FUNC();
@@ -195,6 +200,8 @@ 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)
+  line_base_cycles = SekCyclesDone();
+  if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
   CPUS_RUN(CYCLES_M68K_VINT_LAG);
 
   if (pv->reg[1]&0x20) {
@@ -210,7 +217,8 @@ static int PicoFrameHints(void)
   }
 
 #ifdef PICO_CD
-  pcd_sync_s68k(cycles);
+  if (PicoAHW & PAHW_MCD)
+    pcd_sync_s68k(cycles, 0);
 #endif
 #ifdef PICO_32X
   p32x_sync_sh2s(cycles);
@@ -219,14 +227,9 @@ static int PicoFrameHints(void)
 
   // 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);
 
   if (PicoLineHook) PicoLineHook();
@@ -247,6 +250,7 @@ static int PicoFrameHints(void)
     PAD_DELAY();
 
     // Run scanline:
+    line_base_cycles = SekCyclesDone();
     if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
     CPUS_RUN(CYCLES_M68K_LINE);
 
@@ -258,11 +262,12 @@ static int PicoFrameHints(void)
   cycles = SekCyclesDone();
   if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80))
     PicoSyncZ80(cycles);
-  if (PsndOut && ym2612.dacen && PsndDacLine <= lines-1)
-    PsndDoDAC(lines-1);
+  if (PsndOut && ym2612.dacen && PsndDacLine < lines)
+    PsndDoDAC(lines - 1);
 
 #ifdef PICO_CD
-  pcd_sync_s68k(cycles);
+  if (PicoAHW & PAHW_MCD)
+    pcd_sync_s68k(cycles, 0);
 #endif
 #ifdef PICO_32X
   p32x_sync_sh2s(cycles);