SVP stubs

git-svn-id: file:///home/notaz/opt/svn/PicoDrive@317 be3aeb3a-fb24-0410-a615-afba39da0efa

Pico/Cart.c

@@ -632,5 +632,13 @@ void PicoCartDetect(void)
   // Unusual region 'code'
   if (rom_strcmp(0x1f0, "EUROPE") == 0)
     *(int *) (Pico.rom+0x1f0) = 0x20204520;
+
+  // SVP detection
+  if (name_cmp("Virtua Racing") == 0)
+  {
+    PicoSVPInit();
+    PicoRead16Hook = PicoSVPRead16;
+    PicoWrite8Hook = PicoSVPWrite8;
+  }
 }
 

Pico/Memory.c

@@ -203,10 +203,7 @@ static void SRAMWrite(u32 a, u32 d)
 }
 
 // for nonstandard reads
-#ifndef _ASM_MEMORY_C
-static
-#endif
-u32 OtherRead16End(u32 a, int realsize)
+static u32 OtherRead16End(u32 a, int realsize)
 {
   u32 d=0;
 
@@ -499,8 +496,17 @@ static void PicoWrite32(u32 a,u32 d)
 
 
 // -----------------------------------------------------------------
+
+// TODO: asm code
+u32  (*PicoRead16Hook)(u32 a, int realsize) = OtherRead16End;
+void (*PicoWrite8Hook)(u32 a, u32 d, int realsize) = OtherWrite8End;
+
 PICO_INTERNAL void PicoMemSetup(void)
 {
+  // default unmapped/cart specific handlers
+  PicoRead16Hook = OtherRead16End;
+  PicoWrite8Hook = OtherWrite8End;
+
   // Setup memory callbacks:
 #ifdef EMU_C68K
   PicoCpuCM68k.checkpc=PicoCheckPc;

Pico/MemoryCmn.c

@@ -136,7 +136,7 @@ u32 OtherRead16(u32 a, int realsize)
     goto end;
   }
 
-  d = OtherRead16End(a, realsize);
+  d = PicoRead16Hook(a, realsize);
 
 end:
   return d;
@@ -191,7 +191,7 @@ void OtherWrite8(u32 a,u32 d)
     return;
   }
 
-  OtherWrite8End(a, d, 8);
+  PicoWrite8Hook(a, d, 8);
 }
 
 
@@ -227,10 +227,10 @@ void OtherWrite16(u32 a,u32 d)
       SRAMWrite(a, d);
     return;
   }
-#else
-  OtherWrite8End(a,  d>>8, 16);
-  OtherWrite8End(a+1,d&0xff, 16);
 #endif
+
+  PicoWrite8Hook(a,  d>>8, 16);
+  PicoWrite8Hook(a+1,d&0xff, 16);
 }
 
 

Pico/PicoInt.h

@@ -13,6 +13,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include "Pico.h"
+#include "carthw/carthw.h"
 
 //
 #define USE_POLL_DETECT
@@ -393,6 +394,8 @@ PICO_INTERNAL unsigned short z80_read16(unsigned short a);
 #else
 PICO_INTERNAL_ASM void z80_write(unsigned int a, unsigned char data);
 #endif
+extern unsigned int (*PicoRead16Hook)(unsigned int a, int realsize);
+extern void (*PicoWrite8Hook)(unsigned int a,unsigned int d,int realsize);
 
 // cd/Memory.c
 PICO_INTERNAL void PicoMemSetupCD(void);

Pico/carthw/carthw.h

@@ -0,0 +1,8 @@
+
+
+/* svp */
+void PicoSVPInit(void);
+
+unsigned int PicoSVPRead16(unsigned int a, int realsize);
+void PicoSVPWrite8(unsigned int a,unsigned int d,int realsize);
+

Pico/carthw/svp/Memory.c

@@ -0,0 +1,16 @@
+#include "../../PicoInt.h"
+
+unsigned int PicoSVPRead16(unsigned int a, int realsize)
+{
+  unsigned int d = 0;
+
+  elprintf(EL_UIO, "SVP r%i: [%06x] %04x @%06x", realsize, a&0xffffff, d, SekPc);
+
+  return d;
+}
+
+void PicoSVPWrite8(unsigned int a, unsigned int d, int realsize)
+{
+  elprintf(EL_UIO, "SVP w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);
+}
+

Pico/carthw/svp/svp.c

@@ -0,0 +1,7 @@
+#include "../../PicoInt.h"
+
+void PicoSVPInit(void)
+{
+  elprintf(0xffff, "SVP");
+}
+

Pico/cd/Memory.c

@@ -1626,6 +1626,10 @@ void PicoMemResetCD(int r3)
 
 PICO_INTERNAL void PicoMemSetupCD(void)
 {
+  // additional handlers for common code
+  PicoRead16Hook = OtherRead16End;
+  PicoWrite8Hook = OtherWrite8End;
+
 #ifdef EMU_C68K
   // Setup m68k memory callbacks:
   PicoCpuCM68k.checkpc=PicoCheckPcM68k;