pico, added detection by extension

pico/cart.c

@@ -837,7 +837,7 @@ int PicoCartInsert(unsigned char *rom, unsigned int romsize, const char *carthw_
   }
   pdb_cleanup();
 
-  PicoIn.AHW &= PAHW_MCD|PAHW_SMS;
+  PicoIn.AHW &= PAHW_MCD|PAHW_SMS|PAHW_PICO;
 
   PicoCartMemSetup = NULL;
   PicoDmaHook = NULL;
@@ -846,9 +846,9 @@ int PicoCartInsert(unsigned char *rom, unsigned int romsize, const char *carthw_
   PicoLoadStateHook = NULL;
   carthw_chunks = NULL;
 
-  if (!(PicoIn.AHW & (PAHW_MCD|PAHW_SMS)))
+  if (!(PicoIn.AHW & (PAHW_MCD|PAHW_SMS|PAHW_PICO)))
     PicoCartDetect(carthw_cfg);
-  else if (PicoIn.AHW & PAHW_SMS)
+  if (PicoIn.AHW & PAHW_SMS)
     PicoCartDetectMS();
 
   // setup correct memory map for loaded ROM

pico/carthw.cfg

@@ -42,24 +42,13 @@ check_str = 0x150, "VIRTUA RACING"
 check_str = 0x810, "OHMP"
 hw = svp
 
-[Pico]
+[Soreike! Anpanman no Game de Asobou Anpanman - Pico]
-check_str = 0x100, "SEGA PICO"
+check_str = 0x100, "SEGA IAC "
 hw = pico
 
-[Pico]
+# Unou Kaihatsu Series: IMA IKUNO[U]JYUKU
-check_str = 0x100, "SEGATOYS PICO"
+[Unou Kaihatsu Series - Pico]
-hw = pico
+check_str = 0x100, "IMA IKUNO"
-
-[Pico]
-check_str = 0x100, "SEGA TOYS PICO"
-hw = pico
-
-[Pico]
-check_str = 0x100, "SAMSUNG PICO"
-hw = pico
-
-[Pico]
-check_str = 0x100, "IMA IKUNOUJYUKU"
 hw = pico
 
 # sram emulation triggers some protection for this one

pico/carthw_cfg.c

@@ -9,19 +9,10 @@ static const char builtin_carthw_cfg[] =
   "check_str=0x810,\"OHMP\"\n"
   "hw=svp\n"
   "[]\n"
-  "check_str=0x100,\"SEGA PICO\"\n"
+  "check_str=0x100,\"SEGA IAC \"\n"
   "hw=pico\n"
   "[]\n"
-  "check_str=0x100,\"SEGATOYS PICO\"\n"
+  "check_str=0x100,\"IMA IKUNO\"\n"
-  "hw=pico\n"
-  "[]\n"
-  "check_str=0x100,\"SEGA TOYS PICO\"\n"
-  "hw=pico\n"
-  "[]\n"
-  "check_str=0x100,\"SAMSUNG PICO\"\n"
-  "hw=pico\n"
-  "[]\n"
-  "check_str=0x100,\"IMA IKUNOUJYUKU\"\n"
   "hw=pico\n"
   "[]\n"
   "check_str=0x120,\"PUGGSY\"\n"

pico/media.c

@@ -36,6 +36,7 @@ static int detect_media(const char *fname)
   static const short sms_offsets[] = { 0x7ff0, 0x3ff0, 0x1ff0 };
   static const char *sms_exts[] = { "sms", "gg", "sg" };
   static const char *md_exts[] = { "gen", "smd" };
+  static const char *pico_exts[] = { "pco" };
   char buff0[512], buff[32];
   unsigned short *d16;
   pm_file *pmf;
@@ -78,8 +79,12 @@ static int detect_media(const char *fname)
     goto extension_check;
   }
 
-  /* MD header? Act as TMSS BIOS here */
   if (pm_seek(pmf, 0x100, SEEK_SET) == 0x100 && pm_read(buff, 16, pmf) == 16) {
+    /* PICO header? Almost always appropriately marked */
+    buff[16] = '\0';
+    if (strstr(buff, " PICO "))
+      goto looks_like_pico;
+    /* MD header? Act as TMSS BIOS here */
     if (strncmp(buff, "SEGA", 4) == 0 || strncmp(buff, " SEG", 4) == 0)
       goto looks_like_md;
   }
@@ -105,6 +110,10 @@ extension_check:
     if (strcasecmp(pmf->ext, sms_exts[i]) == 0)
       goto looks_like_sms;
 
+  for (i = 0; i < ARRAY_SIZE(pico_exts); i++)
+    if (strcasecmp(pmf->ext, pico_exts[i]) == 0)
+      goto looks_like_pico;
+
   /* If everything else fails, make a guess on the reset vector */
   d16 = (unsigned short *)(buff0 + 4);
   if ((((d16[0] << 16) | d16[1]) & 0xffffff) >= pmf->size) {
@@ -124,6 +133,10 @@ looks_like_md:
 looks_like_sms:
   pm_close(pmf);
   return PM_MARK3;
+
+looks_like_pico:
+  pm_close(pmf);
+  return PM_PICO;
 }
 
 /* checks if fname points to valid MegaCD image */
@@ -250,6 +263,9 @@ enum media_type_e PicoLoadMedia(const char *filename,
   else if (media_type == PM_MARK3) {
     PicoIn.AHW = PAHW_SMS;
   }
+  else if (media_type == PM_PICO) {
+    PicoIn.AHW = PAHW_PICO;
+  }
 
   rom = pm_open(rom_fname);
   if (rom == NULL) {

pico/pico.h

@@ -264,6 +264,7 @@ enum media_type_e {
   PM_BAD_CD_NO_BIOS = -4,
   PM_MD_CART = 1,	/* also 32x */
   PM_MARK3,
+  PM_PICO,
   PM_CD,
 };