Pico version reg, irq3 handling changed

git-svn-id: file:///home/notaz/opt/svn/PicoDrive@443 be3aeb3a-fb24-0410-a615-afba39da0efa

Pico/Pico.c

@@ -80,39 +80,19 @@ void PicoPower(void)
   PicoReset();
 }
 
-int PicoReset(void)
+PICO_INTERNAL void PicoDetectRegion(void)
 {
-  unsigned int region=0;
-  int support=0,hw=0,i=0;
+  int support=0, hw=0, i;
   unsigned char pal=0;
-  unsigned char sram_reg=Pico.m.sram_reg; // must be preserved
 
-  if (Pico.romsize<=0) return 1;
-
-  /* must call now, so that banking is reset, and correct vectors get fetched */
-  if (PicoResetHook) PicoResetHook();
-
-  PicoMemReset();
-  SekReset();
-  // s68k doesn't have the TAS quirk, so we just globally set normal TAS handler in MCD mode (used by Batman games).
-  SekSetRealTAS(PicoAHW & PAHW_MCD);
-  SekCycleCntT=0;
-
-  if (PicoAHW & PAHW_MCD)
-    // needed for MCD to reset properly, probably some bug hides behind this..
-    memset(Pico.ioports,0,sizeof(Pico.ioports));
-  emustatus = 0;
-
-  Pico.m.dirtyPal = 1;
-
-  if(PicoRegionOverride)
+  if (PicoRegionOverride)
   {
     support = PicoRegionOverride;
   }
   else
   {
     // Read cartridge region data:
-    region=PicoRead32(0x1f0);
+    int region=PicoRead32(0x1f0);
 
     for (i=0;i<4;i++)
     {
@@ -153,7 +133,32 @@ int PicoReset(void)
 
   Pico.m.hardware=(unsigned char)(hw|0x20); // No disk attached
   Pico.m.pal=pal;
-  Pico.video.status = 0x3408 | pal; // 'always set' bits | vblank | pal
+}
+
+int PicoReset(void)
+{
+  unsigned char sram_reg=Pico.m.sram_reg; // must be preserved
+
+  if (Pico.romsize<=0) return 1;
+
+  /* must call now, so that banking is reset, and correct vectors get fetched */
+  if (PicoResetHook) PicoResetHook();
+
+  PicoMemReset();
+  SekReset();
+  // s68k doesn't have the TAS quirk, so we just globally set normal TAS handler in MCD mode (used by Batman games).
+  SekSetRealTAS(PicoAHW & PAHW_MCD);
+  SekCycleCntT=0;
+
+  if (PicoAHW & PAHW_MCD)
+    // needed for MCD to reset properly, probably some bug hides behind this..
+    memset(Pico.ioports,0,sizeof(Pico.ioports));
+  emustatus = 0;
+
+  Pico.m.dirtyPal = 1;
+
+  PicoDetectRegion();
+  Pico.video.status = 0x3408 | Pico.m.pal; // 'always set' bits | vblank | pal
 
   PsndReset(); // pal must be known here
 

Pico/Pico.h

@@ -78,6 +78,7 @@ typedef struct
 	// internal
 	int fifo_bytes;
 	int line_counter;
+	unsigned int r1, r12;
 } picohw_state;
 extern picohw_state PicoPicohw;
 

Pico/Pico/Memory.c

@@ -31,6 +31,7 @@ static u32 PicoReadPico8(u32 a)
   {
     switch (a & 0x1f)
     {
+      case 0x01: d = PicoPicohw.r1; break;
       case 0x03:
         d  =  PicoPad[0]&0x1f; // d-pad
         d |= (PicoPad[0]&0x20) << 2; // red button -> C
@@ -143,6 +144,7 @@ static void PicoWritePico16(u32 a,u16 d)
 
 //  if (a == 0x800010) dump(d);
   if (a == 0x800010) PicoPicohw.fifo_bytes += 2;
+  if (a == 0x800012) PicoPicohw.r12 = d;
 
   elprintf(EL_UIO, "w16: %06x, %04x", a&0xffffff, d);
 }

Pico/Pico/Pico.c

@@ -9,23 +9,32 @@ static int prev_line_cnt_irq3 = 0, prev_line_cnt_irq5 = 0;
 
 static void PicoLineHookPico(int count)
 {
-
   PicoPicohw.line_counter += count;
-  if ((PicoPicohw.line_counter & 0xf) == 0 || count > 10)
-  {
-    if (PicoPicohw.fifo_bytes > 0)
-      PicoPicohw.fifo_bytes--;
-  }
 
-#if 0
-  if (PicoPicohw.line_counter - prev_line_cnt_irq3 > 200) {
+#if 1
+  if ((PicoPicohw.r12 & 0x4003) && PicoPicohw.line_counter - prev_line_cnt_irq3 > 200) {
     prev_line_cnt_irq3 = PicoPicohw.line_counter;
     // just a guess/hack, allows 101 Dalmantians to boot
     elprintf(EL_ANOMALY, "irq3");
     SekInterrupt(3);
+    return;
+  }
+
+  if (PicoPicohw.fifo_bytes == 16) {
+    prev_line_cnt_irq3 = PicoPicohw.line_counter;
+    elprintf(EL_ANOMALY, "irq3, fb=%i", PicoPicohw.fifo_bytes);
+    SekInterrupt(3);
+    PicoPicohw.fifo_bytes--;
+    return;
   }
 #endif
 
+  if ((PicoPicohw.line_counter & 3) == 0 || count > 10)
+  {
+    if (PicoPicohw.fifo_bytes > 0)
+      PicoPicohw.fifo_bytes--;
+  }
+
 #if 0
   if (PicoPicohw.line_counter - prev_line_cnt_irq5 > 512) {
     prev_line_cnt_irq5 = PicoPicohw.line_counter;
@@ -46,6 +55,16 @@ PICO_INTERNAL int PicoInitPico(void)
   PicoPicohw.pen_pos[1] = 0x200 + 252/2;
   prev_line_cnt_irq3 = 0, prev_line_cnt_irq5 = 0;
 
+  // map version register
+  PicoDetectRegion();
+  elprintf(EL_STATUS, "a %x", Pico.m.hardware);
+  switch (Pico.m.hardware >> 6) {
+    case 0: PicoPicohw.r1 = 0x00; break;
+    case 1: PicoPicohw.r1 = 0x00; break;
+    case 2: PicoPicohw.r1 = 0x40; break;
+    case 3: PicoPicohw.r1 = 0x20; break;
+  }
+
   return 0;
 }
 

Pico/PicoInt.h

@@ -431,7 +431,8 @@ extern int emustatus;
 extern int z80startCycle, z80stopCycle; // in 68k cycles
 extern void (*PicoResetHook)(void);
 extern void (*PicoLineHook)(int count);
-PICO_INTERNAL int CheckDMA(void);
+PICO_INTERNAL int  CheckDMA(void);
+PICO_INTERNAL void PicoDetectRegion(void);
 
 // cd/Pico.c
 PICO_INTERNAL int  PicoInitMCD(void);

platform/linux/gp2x.c

@@ -71,6 +71,11 @@ static gint key_press_event (GtkWidget *widget, GdkEventKey *event)
 		case 0x19: current_keys |= GP2X_VOL_UP;break; // w
 		case 0x2d: log_io_clear(); break; // k
 		case 0x2e: log_io_dump();  break; // l
+		case 0x17: { // tab
+			extern int PicoReset(void);
+			PicoReset();
+			break;
+		}
 	}
 
 	return 0;