region detection, cd states wip, fixes, stuff

[picodrive.git] / Pico / cd / Pico.c

diff --git a/Pico/cd/Pico.c b/Pico/cd/Pico.c
index 9e87e9e..8b4c9e5 100644 (file)
--- a/Pico/cd/Pico.c
+++ b/Pico/cd/Pico.c
@@ -11,7 +11,7 @@
 #include "../sound/sound.h"
 
 
-static int counter75hz = 0; // TODO: move 2 context
+extern unsigned char formatted_bram[8*0x10];
 
 
 int PicoInitMCD(void)
@@ -30,15 +30,22 @@ void PicoExitMCD(void)
 
 int PicoResetMCD(int hard)
 {
-  // clear everything except BIOS
-  memset(Pico_mcd->prg_ram, 0, sizeof(mcd_state) - sizeof(Pico_mcd->bios));
+  memset(Pico_mcd->prg_ram,  0, sizeof(Pico_mcd->prg_ram));
+  memset(Pico_mcd->word_ram, 0, sizeof(Pico_mcd->word_ram));
+  if (hard) {
+         memset(Pico_mcd->bram, 0, sizeof(Pico_mcd->bram));
+         memcpy(Pico_mcd->bram + sizeof(Pico_mcd->bram) - 8*0x10, formatted_bram, 8*0x10);
+  }
+  memset(Pico_mcd->s68k_regs, 0, sizeof(Pico_mcd->s68k_regs));
+
   *(unsigned int *)(Pico_mcd->bios + 0x70) = 0xffffffff; // reset hint vector (simplest way to implement reg6)
-  PicoMCD |= 2; // s68k reset pending
+  Pico_mcd->m.state_flags |= 2; // s68k reset pending
   Pico_mcd->s68k_regs[3] = 1; // 2M word RAM mode with m68k access after reset
-  counter75hz = 0;
+  Pico_mcd->m.counter75hz = 0;
 
   LC89510_Reset();
   Reset_CD();
+  gfx_cd_reset();
 
   return 0;
 }
@@ -48,7 +55,11 @@ static __inline void SekRun(int cyc)
   int cyc_do;
   SekCycleAim+=cyc;
   if((cyc_do=SekCycleAim-SekCycleCnt) < 0) return;
-#if defined(EMU_M68K)
+#if defined(EMU_C68K)
+  PicoCpu.cycles=cyc_do;
+  CycloneRun(&PicoCpu);
+  SekCycleCnt+=cyc_do-PicoCpu.cycles;
+#elif defined(EMU_M68K)
   m68k_set_context(&PicoM68kCPU);
   SekCycleCnt+=m68k_execute(cyc_do);
 #endif
@@ -59,7 +70,11 @@ static __inline void SekRunS68k(int cyc)
   int cyc_do;
   SekCycleAimS68k+=cyc;
   if((cyc_do=SekCycleAimS68k-SekCycleCntS68k) < 0) return;
-#if defined(EMU_M68K)
+#if defined(EMU_C68K)
+  PicoCpuS68k.cycles=cyc_do;
+  CycloneRun(&PicoCpuS68k);
+  SekCycleCntS68k+=cyc_do-PicoCpuS68k.cycles;
+#elif defined(EMU_M68K)
   m68k_set_context(&PicoS68kCPU);
   SekCycleCntS68k+=m68k_execute(cyc_do);
 #endif
@@ -82,6 +97,27 @@ static __inline void check_cd_dma(void)
        Update_CDC_TRansfer(ddx); // now go and do the actual transfer
 }
 
+// to be called on 224 or line_sample scanlines only
+static __inline void getSamples(int y)
+{
+  if(y == 224) {
+    //dprintf("sta%i: %i [%i]", (emustatus & 2), emustatus, y);
+    if(emustatus & 2)
+        sound_render(PsndLen/2, PsndLen-PsndLen/2);
+    else sound_render(0, PsndLen);
+    if (emustatus&1) emustatus|=2; else emustatus&=~2;
+    if (PicoWriteSound) PicoWriteSound();
+    // clear sound buffer
+    memset(PsndOut, 0, (PicoOpt & 8) ? (PsndLen<<2) : (PsndLen<<1));
+  }
+  else if(emustatus & 3) {
+    emustatus|= 2;
+    emustatus&=~1;
+    sound_render(0, PsndLen/2);
+  }
+}
+
+
 
 // Accurate but slower frame which does hints
 static int PicoFrameHintsMCD(void)
@@ -176,7 +212,7 @@ static int PicoFrameHintsMCD(void)
     if(y == 32 && PsndOut)
       emustatus &= ~1;
     else if((y == 224 || y == line_sample) && PsndOut)
-      ;//getSamples(y);
+      getSamples(y);
 
     // Run scanline:
       //dprintf("m68k starting exec @ %06x", SekPc);
@@ -206,8 +242,8 @@ static int PicoFrameHintsMCD(void)
       total_z80+=z80_run(z80CycleAim-total_z80);
     }
 
-    if ((counter75hz+=10) >= counter75hz_lim) {
-      counter75hz -= counter75hz_lim;
+    if ((Pico_mcd->m.counter75hz+=10) >= counter75hz_lim) {
+      Pico_mcd->m.counter75hz -= counter75hz_lim;
       Check_CD_Command();
     }