sanic cd now loads up to a "backup ram broken" screen

genplus-gx/core/cd_hw/cdd.c

@@ -134,14 +134,33 @@ typedef struct
 	void (*cdd_readcallback)(int lba, void *dest);
 } frontendcd_t;
 
-int cdd_load(void)
+int cdd_load(char *header)
 {
 	frontendcd_t fecd;
+	char data[2048];
+	int startoffs;
+
+
 	int bytes = sizeof(frontendcd_t);
 	if (load_archive("PRIMARY_CD", (unsigned char *)&fecd, bytes, NULL) != bytes)
 		return 0;
+
+	// look for valid header
+	fecd.cdd_readcallback(0, data);
+	if (memcmp("SEGADISCSYSTEM", data, 14) == 0)
+		startoffs = 0;
+	else if (memcmp("SEGADISCSYSTEM", data + 16, 14) == 0)
+		startoffs = 16;
+	else
+		return 0;
+	// copy security block
+	memcpy(header, data + startoffs, 0x210);
+
+	// copy disk information
 	cdd_readcallback = fecd.cdd_readcallback;
 	memcpy(&cdd.toc, &fecd.toc, sizeof(toc_t));
+	
+	cdd.loaded = 1;
 	return 1;
 }
 

genplus-gx/core/cd_hw/cdd.h

@@ -96,7 +96,7 @@ extern void cdd_init(blip_t* left, blip_t* right);
 extern void cdd_reset(void);
 extern int cdd_context_save(uint8 *state);
 extern int cdd_context_load(uint8 *state);
-extern int cdd_load(void);
+extern int cdd_load(char *header);
 extern void cdd_unload(void);
 extern void cdd_read_data(uint8 *dst);
 extern void cdd_read_audio(unsigned int samples);

genplus-gx/core/loadrom.c

@@ -541,7 +541,7 @@ int load_rom(char *filename)
   }
 
   /* auto-detect CD image files */
-  size = cdd_load();
+  size = cdd_load((char *)(cart.rom));
   if (size < 0)
   {
     /* error opening file */
@@ -730,7 +730,7 @@ int load_rom(char *filename)
 
         /* automatically load associated .iso image */
         strncpy(&filename[strlen(filename) - 4], ".iso", 4);
-        cdd_load(); // should this be checked for failure?
+        cdd_load((char *)cdc.ram); // should this be checked for failure?
       }
       else
       {