[Gamecube/Wii] added configurable BIOS & Lock-on ROM support

core/cart_hw/areplay.c

@@ -2,7 +2,7 @@
  *  Genesis Plus
  *  Action Replay / Pro Action Replay emulation
  *
- *  Copyright (C) 2009-2011  Eke-Eke (Genesis Plus GX)
+ *  Copyright (C) 2009-2014  Eke-Eke (Genesis Plus GX)
  *
  *  Redistribution and use of this code or any derivative works are permitted
  *  provided that the following conditions are met:
@@ -60,7 +60,6 @@ static void ar_write_ram_8(uint32 address, uint32 data);
 void areplay_init(void)
 {
   int size;
-  FILE *f;
   
   memset(&action_replay,0,sizeof(action_replay));
 
@@ -69,19 +68,15 @@ void areplay_init(void)
   action_replay.rom = cart.rom + 0x810000;
   action_replay.ram = cart.rom + 0x830000;
 
-  /* Open Action Replay ROM */
+  /* try to load Action Replay ROM file */
-  f = fopen(AR_ROM,"rb");
+  size = load_archive(AR_ROM, action_replay.rom, 0x20000, NULL);
-  if (f == NULL) return;
-
-  /* ROM size */
-  fseek(f, 0, SEEK_END);
-  size = ftell(f);
-  fseek(f, 0, SEEK_SET);
 
   /* detect Action Replay board type */
   switch (size)
   {
     case 0x8000:  
+    {
+      if (!memcmp(action_replay.rom + 0x120, "ACTION REPLAY   ", 16))
       {
         /* normal Action Replay (32K) */
         action_replay.enabled = TYPE_AR;
@@ -90,17 +85,16 @@ void areplay_init(void)
         m68k.memory_map[0x01].write16 = ar_write_regs;
         break;
       }
+    }
 
     case 0x10000:
     case 0x20000:
     {
-      /* read Stack Pointer */
+      /* Read stack pointer MSB */
-      uint8 sp[4];
+      uint8 sp = READ_BYTE(action_replay.rom, 0x01);
-      fread(&sp, 4, 1, f);
-      fseek(f, 0, SEEK_SET);
 
       /* Detect board version */
-      if (sp[1] == 0x42)
+      if ((sp == 0x42) && !memcmp(action_replay.rom + 0x120, "ACTION REPLAY 2 ", 16))
       {
         /* PRO Action Replay 1 (64/128K) */
         action_replay.enabled = TYPE_PRO1;
@@ -108,7 +102,7 @@ void areplay_init(void)
         /* internal registers mapped at $010000-$01ffff */
         m68k.memory_map[0x01].write16 = ar_write_regs;
       }
-      else if (sp[1] == 0x60)
+      else if ((sp == 0x60) && !memcmp(action_replay.rom + 0x3c6, "ACTION REPLAY II", 16))
       {
         /* PRO Action Replay 2 (64K) */
         action_replay.enabled = TYPE_PRO2;
@@ -120,11 +114,11 @@ void areplay_init(void)
       /* internal RAM (64k), mapped at $420000-$42ffff or $600000-$60ffff */
       if (action_replay.enabled)
       {
-        m68k.memory_map[sp[1]].base      = action_replay.ram;
+        m68k.memory_map[sp].base      = action_replay.ram;
-        m68k.memory_map[sp[1]].read8     = NULL;
+        m68k.memory_map[sp].read8     = NULL;
-        m68k.memory_map[sp[1]].read16    = NULL;
+        m68k.memory_map[sp].read16    = NULL;
-        m68k.memory_map[sp[1]].write8    = ar_write_ram_8;
+        m68k.memory_map[sp].write8    = ar_write_ram_8;
-        m68k.memory_map[sp[1]].write16   = NULL;
+        m68k.memory_map[sp].write16   = NULL;
       }
       break;
     }
@@ -135,16 +129,10 @@ void areplay_init(void)
     }
   }
 
+#ifdef LSB_FIRST
   if (action_replay.enabled)
   {
-    /* Load ROM */
+    int i;
-    int i = 0;
-    for (i=0; i<size; i+=0x1000)
-    {
-      fread(action_replay.rom + i, 0x1000, 1, f);
-    }
-
-#ifdef LSB_FIRST
     for (i= 0; i<size; i+=2)
     {
       /* Byteswap ROM */
@@ -152,11 +140,8 @@ void areplay_init(void)
       action_replay.rom[i] = action_replay.rom[i+1];
       action_replay.rom[i+1] = temp;
     }
-#endif
   }
-
+#endif
-  /* Close ROM file */
-  fclose(f);
 }
 
 void areplay_shutdown(void)

core/cart_hw/areplay.h

@@ -2,7 +2,7 @@
  *  Genesis Plus
  *  DATEL Action Replay / Pro Action Replay emulation
  *
- *  Copyright (C) 2009-2011  Eke-Eke (Genesis Plus GX)
+ *  Copyright (C) 2009-2014  Eke-Eke (Genesis Plus GX)
  *
  *  Redistribution and use of this code or any derivative works are permitted
  *  provided that the following conditions are met:

core/cart_hw/ggenie.c

@@ -2,7 +2,7 @@
  *  Genesis Plus
  *  Game Genie Hardware emulation
  *
- *  Copyright (C) 2009-2011  Eke-Eke (Genesis Plus GX)
+ *  Copyright (C) 2009-2014  Eke-Eke (Genesis Plus GX)
  *
  *  Based on documentation from Charles McDonald
  *  (http://cgfm2.emuviews.com/txt/genie.txt)
@@ -59,29 +59,17 @@ static void ggenie_write_regs(unsigned int offset, unsigned int data);
 
 void ggenie_init(void)
 {  
-  int i;
-  FILE *f;
-  
   memset(&ggenie,0,sizeof(ggenie));
 
   /* Store Game Genie ROM (32k) above cartridge ROM + SRAM area */
   if (cart.romsize > 0x810000) return;
   ggenie.rom = cart.rom + 0x810000;
 
-  /* Open Game Genie ROM file */
+  /* Try to load Game Genie ROM file */
-  f = fopen(GG_ROM,"rb");
+  if (load_archive(GG_ROM, ggenie.rom, 0x8000, NULL) > 0)
-  if (f == NULL) return;
-
-  /* Load ROM */
-  for (i=0; i<0x8000; i+=0x1000)
   {
-    fread(ggenie.rom + i, 0x1000, 1, f);
-  }
-
-  /* Close ROM file */
-  fclose(f);
-
 #ifdef LSB_FIRST
+    int i;
     for (i=0; i<0x8000; i+=2)
     {
       /* Byteswap ROM */
@@ -94,8 +82,9 @@ void ggenie_init(void)
     /* $0000-$7fff mirrored into $8000-$ffff */
     memcpy(ggenie.rom + 0x8000, ggenie.rom, 0x8000);
 
-  /* set flag */
+    /* Game Genie hardware is enabled */
     ggenie.enabled = 1;
+  }
 }
 
 void ggenie_shutdown(void)

core/cart_hw/ggenie.h

@@ -2,7 +2,7 @@
  *  Genesis Plus
  *  Game Genie Hardware emulation
  *
- *  Copyright (C) 2009-2011  Eke-Eke (Genesis Plus GX)
+ *  Copyright (C) 2009-2014  Eke-Eke (Genesis Plus GX)
  *
  *  Based on documentation from Charles McDonald
  *  (http://cgfm2.emuviews.com/txt/genie.txt)

core/cart_hw/md_cart.c

@@ -463,28 +463,23 @@ void md_cart_init(void)
 
     case TYPE_SK:
     {
-      FILE *f;
-      
       /* store S&K ROM above cartridge ROM (and before backup memory) */
       if (cart.romsize > 0x600000) break;
 
-      /* load Sonic & Knuckles ROM (2 MB) */
+      /* try to load Sonic & Knuckles ROM file (2 MB) */
-      f = fopen(SK_ROM,"rb");
+      if (load_archive(SK_ROM, cart.rom + 0x600000, 0x200000, NULL) == 0x200000)
-      if (!f) break;
-      for (i=0; i<0x200000; i+=0x1000)
       {
-        fread(cart.rom + 0x600000 + i, 0x1000, 1, f);
+        /* check ROM header */
-      }
+        if (!memcmp(cart.rom + 0x600000 + 0x120, "SONIC & KNUCKLES",16))
-      fclose(f);
-
-      /* load Sonic 2 UPMEM ROM (256 KB) */
-      f = fopen(SK_UPMEM,"rb");
-      if (!f) break;
-      for (i=0; i<0x40000; i+=0x1000)
         {
-        fread(cart.rom + 0x900000 + i, 0x1000, 1, f);
+          /* try to load Sonic 2 & Knuckles UPMEM ROM (256 KB) */
+          if (load_archive(SK_UPMEM, cart.rom + 0x900000, 0x40000, NULL) == 0x40000)
+          {          
+            /* $000000-$1FFFFF is mapped to S&K ROM */
+            for (i=0x00; i<0x20; i++)
+            {
+              m68k.memory_map[i].base = cart.rom + 0x600000 + (i << 16);
             }
-      fclose(f);
 
 #ifdef LSB_FIRST
             for (i=0; i<0x200000; i+=2)
@@ -503,14 +498,10 @@ void md_cart_init(void)
               cart.rom[i + 0x900000 + 1] = temp;
             }
 #endif
-
-      /* $000000-$1FFFFF is mapped to S&K ROM */
-      for (i=0x00; i<0x20; i++)
-      {
-        m68k.memory_map[i].base = cart.rom + 0x600000 + (i << 16);
-      }
-
             cart.special |= HW_LOCK_ON;
+          }
+        }
+      }
       break;
     }
 

core/loadrom.c

@@ -453,7 +453,7 @@ int load_bios(void)
         if (cart.romsize <= 0x400000)
         {
           /* load Game Gear BOOTROM file */
-          size = load_archive(GG_BIOS, cart.rom + 0x400000, 0x100000, 0);
+          size = load_archive(GG_BIOS, cart.rom + 0x400000, 0x400000, 0);
 
           if (size > 0)
           {

gx/config.c

@@ -41,6 +41,8 @@
 #include "gui.h"
 #include "file_load.h"
 
+t_config config;
+
 static int config_load(void)
 {
   /* open configuration file */
@@ -239,6 +241,20 @@ void config_default(void)
   sprintf (config.lastdir[4][TYPE_DVD], "dvd:%s/roms/", DEFAULT_PATH);
 #endif
 
+  /* system ROM paths */
+  sprintf (config.sys_rom[0],   "%s/bios/bios_CD_U.bin",  DEFAULT_PATH);
+  sprintf (config.sys_rom[1],   "%s/bios/bios_CD_E.bin",  DEFAULT_PATH);
+  sprintf (config.sys_rom[2],   "%s/bios/bios_CD_J.bin",  DEFAULT_PATH);
+  sprintf (config.sys_rom[3],   "%s/bios/bios_MD.bin",  DEFAULT_PATH);
+  sprintf (config.sys_rom[4],   "%s/bios/bios_U.sms", DEFAULT_PATH);
+  sprintf (config.sys_rom[5],   "%s/bios/bios_E.sms", DEFAULT_PATH);
+  sprintf (config.sys_rom[6],   "%s/bios/bios_J.sms", DEFAULT_PATH);
+  sprintf (config.sys_rom[7],   "%s/bios/bios.gg",  DEFAULT_PATH);
+  sprintf (config.sys_rom[8],   "%s/lock-on/ggenie.bin",  DEFAULT_PATH);
+  sprintf (config.sys_rom[9],   "%s/lock-on/areplay.bin", DEFAULT_PATH);
+  sprintf (config.sys_rom[10],  "%s/lock-on/sk.bin",  DEFAULT_PATH);
+  sprintf (config.sys_rom[11],  "%s/lock-on/sk2chip.bin", DEFAULT_PATH);
+
   /* try to restore user config */
   int loaded = config_load();
   

gx/config.h

@@ -119,11 +119,10 @@ typedef struct
   float ntsc_artifacts;
   float ntsc_fringing;
   float ntsc_bleed;
+  char sys_rom[12][256];
 } t_config;
 
-/* Global data */
+extern t_config config;
-t_config config;
-
 
 extern void config_save(void);
 extern void config_default(void);

gx/fileio/file_load.c

@@ -1,7 +1,7 @@
 /*
  * file_load.c
  * 
- *  ROM File loading support
+ *  File loading support
  *
  *  Copyright Eke-Eke (2008-2014)
  *
@@ -238,12 +238,6 @@ int UpdateDirectory(bool go_up, char *dirname)
   /* go up to parent directory */
   if (go_up)
   {
-    /* special case */
-    if (deviceType == TYPE_RECENT) return 0;
-
-    /* check if we already are at root directory */
-    if (!strcmp(rootdir[deviceType], (const char *)fileDir)) return 0;
-
     int size=0;
     char temp[MAXPATHLEN];
 
@@ -253,14 +247,20 @@ int UpdateDirectory(bool go_up, char *dirname)
     while (test != NULL)
     {
       size = strlen(test);
+      if (dirname)
+      {
         strncpy(dirname,test,size);
         dirname[size] = 0;
+      }
       test = strtok(NULL,"/");
     }
 
+    /* check if we already are at root directory */
+    size = strlen(fileDir) - size - 1;
+    if (!size) return 0;
+
     /* remove last folder from path */
-    size = strlen(fileDir) - size;
+    fileDir[size] = 0;
-    fileDir[size - 1] = 0;
   }
   else
   {
@@ -501,8 +501,30 @@ int OpenDirectory(int device, int type)
       }
     }
 
-    /* parse last directory */
+    /* System ROM selection */
+    if (type >= FILETYPE_MAX)
+    {
+      /* allocate temporary directory */
+      fileDir = malloc(MAXPATHLEN);
+      if (!fileDir)
+      {
+        GUI_WaitPrompt("Error","Unable to allocate memory !");
+        return 0;
+      }
+
+      /* extract System ROM directory */
+      strcpy(fileDir, config.sys_rom[type-FILETYPE_MAX]);
+      int i = strlen(fileDir) - 1;
+      while (fileDir[i] != '/')
+        i--;
+      fileDir[i+1] = 0;
+    }
+    else
+    {
+      /* parse last ROM type directory on selected device */
       fileDir = config.lastdir[type][device];
+    }
+    
     max = ParseDirectory();
     if (max <= 0)
     {
@@ -527,13 +549,24 @@ int OpenDirectory(int device, int type)
   /* check if device or file type has changed */
   if ((device != deviceType) || (type != fileType))
   {
-    /* reset current types */
+    /* reset device type */
     deviceType = device;
+
+    /* make sure we are not selecting System ROM file */
+    if (type < FILETYPE_MAX)
+    {
+      /* reset file type */
       fileType = type;
 
       /* reset File selector */
       ClearSelector(max);
     }
+  }
 
-  return 1;
+  return max;
+}
+
+char *GetCurrentDirectory(void)
+{
+  return fileDir;
 }

gx/fileio/file_load.h

@@ -1,7 +1,7 @@
 /*
  * file_load.c
  * 
- *  ROM File loading support
+ *  File loading support
  *
  *  Copyright Eke-Eke (2008-2014)
  *
@@ -62,6 +62,8 @@ typedef enum
   FILETYPE_MAX
 }FILETYPES;
 
+
+extern char *GetCurrentDirectory(void);
 extern int OpenDirectory(int device, int type);
 extern int UpdateDirectory(bool go_up, char *filename);
 extern int ParseDirectory(void);

gx/fileio/fileio.c

@@ -4,7 +4,7 @@
  *  Load a normal file, or ZIP/GZ archive into ROM buffer.
  *  Returns loaded ROM size (zero if an error occured).
  *  
- *  Copyright Eke-Eke (2007-2013), based on original work from Softdev (2006)
+ *  Copyright Eke-Eke (2007-2014), based on original work from Softdev (2006)
  *
  *  Redistribution and use of this code or any derivative works are permitted
  *  provided that the following conditions are met:
@@ -87,26 +87,54 @@ int load_archive(char *filename, unsigned char *buffer, int maxsize, char *exten
 {
   int size = 0;
   char in[CHUNKSIZE];
-  char msg[64] = "Unable to open file";
+  char msg[64];
+  char type[16];
 
   /* Open file */
   FILE *fd = fopen(filename, "rb");
 
-  /* Master System & Game Gear BIOS are optional files */
+  /* Autodetect needed System ROM files */
-  if (!strcmp(filename,MS_BIOS_US) || !strcmp(filename,MS_BIOS_EU) || !strcmp(filename,MS_BIOS_JP) || !strcmp(filename,GG_BIOS))
+  if (filename == CD_BIOS_US)
   {
-    /* disable all messages */
+    sprintf(type,"CD BIOS (USA)");
+  }
+  else if (filename == CD_BIOS_EU)
+  {
+    sprintf(type,"CD BIOS (PAL)");
+  }
+  else if (filename == CD_BIOS_JP)
+  {
+    sprintf(type,"CD BIOS (JAP)");
+  }
+  else if (filename == AR_ROM)
+  {
+    sprintf(type,"Action Replay");
+  }
+  else if (filename == GG_ROM)
+  {
+    sprintf(type,"Game Genie");
+  }
+  else if (filename == SK_ROM)
+  {
+    sprintf(type,"S&K (2MB ROM)");
+  }
+  else if (filename == SK_UPMEM)
+  {
+    sprintf(type,"S2&K (256K ROM)");
+  }
+  else if ((filename == MS_BIOS_US) || (filename == MS_BIOS_EU) || (filename == MS_BIOS_JP) || (filename == GG_BIOS) || (filename == MD_BIOS))
+  {
+    /* Mega Drive / Genesis, Master System & Game Gear BIOS are optional so we disable error messages */
     SILENT = 1;
   }
-  
+  else
-  /* Mega CD BIOS are required files */
-  if (!strcmp(filename,CD_BIOS_US) || !strcmp(filename,CD_BIOS_EU) || !strcmp(filename,CD_BIOS_JP)) 
   {
-    sprintf(msg,"Unable to open %s", filename + 14);
+    sprintf(type,"file");
   }
 
   if (!fd)
   {
+    sprintf(msg,"Unable to open %s", type);
     GUI_WaitPrompt("Error", msg);
     SILENT = 0;
     return 0;
@@ -128,13 +156,17 @@ int load_archive(char *filename, unsigned char *buffer, int maxsize, char *exten
     size = FLIP32(pkzip->uncompressedSize);
 
     /* Check ROM size */
-    if (size > maxsize)
+    if (size > MAXROMSIZE)
     {
       fclose(fd);
       GUI_WaitPrompt("Error","File is too large");
       SILENT = 0;
       return 0;
     }
+    else if (size > maxsize)
+    {
+      size = maxsize;
+    }
 
     sprintf (msg, "Unzipping %d bytes ...", size);
     GUI_MsgBoxUpdate("Information",msg);
@@ -148,25 +180,23 @@ int load_archive(char *filename, unsigned char *buffer, int maxsize, char *exten
     zs.avail_in = 0;
     zs.next_in = Z_NULL;
     int res = inflateInit2(&zs, -MAX_WBITS);
-
     if (res != Z_OK)
     {
       fclose(fd);
-      GUI_WaitPrompt("Error","Unable to unzip file");
+      sprintf(msg,"Unable to unzip %s", type);
+      GUI_WaitPrompt("Error",msg);
       SILENT = 0;
       return 0;
     }
 
     /* Compressed filename offset */
     int offset = sizeof (PKZIPHEADER) + FLIP16(pkzip->filenameLength);
- 
     if (extension)
     {
       memcpy(extension, &in[offset - 3], 3);
       extension[3] = 0;
     }
 
-   
     /* Initial Zip buffer offset */
     offset += FLIP16(pkzip->extraDataLength);
     zs.next_in = (Bytef *)&in[offset];
@@ -174,6 +204,9 @@ int load_archive(char *filename, unsigned char *buffer, int maxsize, char *exten
     /* Initial Zip remaining chunk size */
     zs.avail_in = CHUNKSIZE - offset;
 
+    /* Initialize output size */
+    size = 0;
+
     /* Start unzipping file */
     do
     {
@@ -188,26 +221,34 @@ int load_archive(char *filename, unsigned char *buffer, int maxsize, char *exten
         {
           inflateEnd(&zs);
           fclose(fd);
-          GUI_WaitPrompt("Error","Unable to unzip file");
+          sprintf(msg,"Unable to unzip %s", type);
+          GUI_WaitPrompt("Error",msg);
           SILENT = 0;
           return 0;
         }
 
         offset = CHUNKSIZE - zs.avail_out;
+
+        if ((size + offset) > maxsize)
+        {
+          offset = maxsize - size;
+        }
+
         if (offset)
         {
           memcpy(buffer, out, offset);
           buffer += offset;
+          size += offset;
         }
       }
-      while (zs.avail_out == 0);
+      while ((zs.avail_out == 0) && (size < maxsize));
 
       /* Read next chunk of zipped data */
       fread(in, CHUNKSIZE, 1, fd);
       zs.next_in = (Bytef *)&in[0];
       zs.avail_in = CHUNKSIZE;
     }
-    while (res != Z_STREAM_END);
+    while ((res != Z_STREAM_END) && (size < maxsize));
     inflateEnd (&zs);
   }
   else
@@ -217,14 +258,18 @@ int load_archive(char *filename, unsigned char *buffer, int maxsize, char *exten
     size = ftell(fd);
     fseek(fd, 0, SEEK_SET);
 
-    /* size limit */
+    /* Check ROM size */
-    if(size > maxsize)
+    if (size > MAXROMSIZE)
     {
       fclose(fd);
       GUI_WaitPrompt("Error","File is too large");
       SILENT = 0;
       return 0;
     }
+    else if (size > maxsize)
+    {
+      size = maxsize;
+    }
 
     sprintf((char *)msg,"Loading %d bytes ...", size);
     GUI_MsgBoxUpdate("Information", (char *)msg);

gx/fileio/fileio.h

@@ -4,7 +4,7 @@
  *  Load a normal file, or ZIP/GZ archive into ROM buffer.
  *  Returns loaded ROM size (zero if an error occured).
  *
- *  Copyright Eke-Eke (2007-2013), based on original work from Softdev (2006)
+ *  Copyright Eke-Eke (2007-2014), based on original work from Softdev (2006)
  *
  *  Redistribution and use of this code or any derivative works are permitted
  *  provided that the following conditions are met:

gx/gui/filesel.c

@@ -1,7 +1,7 @@
 /*
  *  filesel.c
  * 
- *   ROM File Browser
+ *  File Browser
  *
  *  Copyright Eke-Eke (2009-2014)
  *
@@ -97,7 +97,7 @@ static gui_item action_cancel =
 
 static gui_item action_select =
 {
-  NULL,Key_A_png,"","Load ROM file",602,422,28,28
+  NULL,Key_A_png,"","Load file",602,422,28,28
 };
 
 /*****************************************************************************/
@@ -139,6 +139,9 @@ static const char *Cart_dir[FILETYPE_MAX] =
   "sg"
 };
 
+static gui_image dir_icon;
+static gui_image bar_over;
+
 /*****************************************************************************/
 /*  GUI Descriptor                                                           */
 /*****************************************************************************/
@@ -162,22 +165,6 @@ static void selector_cb(void)
   char text[MAXPATHLEN];
   int yoffset = 108;
 
-  /* Initialize directory icon */
-  gui_image dir_icon;
-  dir_icon.texture = gxTextureOpenPNG(Browser_dir_png,0);
-  dir_icon.w = dir_icon.texture->width;
-  dir_icon.h = dir_icon.texture->height;
-  dir_icon.x = 26;
-  dir_icon.y = (26 - dir_icon.h)/2;
-
-  /* Initialize selection bar */
-  gui_image bar_over;
-  bar_over.texture = gxTextureOpenPNG(Overlay_bar_png,0);
-  bar_over.w = bar_over.texture->width;
-  bar_over.h = bar_over.texture->height;
-  bar_over.x = 16;
-  bar_over.y = (26 - bar_over.h)/2;
-
   /* Draw browser array */
   gxDrawRectangle(15, 108, 358, 26, 127, (GXColor)BG_COLOR_1);
   gxDrawRectangle(15, 134, 358, 26, 127, (GXColor)BG_COLOR_2);
@@ -250,9 +237,6 @@ static void selector_cb(void)
 
     yoffset += 26;
   }
-
-  gxTextureClose(&bar_over.texture);
-  gxTextureClose(&dir_icon.texture);
 }  
   
 
@@ -272,6 +256,10 @@ int FileSelector(int type)
   FILE *snap;
   gui_menu *m = &menu_selector;
 
+  int offset_ = -1;
+  int selection_ = -1;
+  int maxfiles_ = -1;
+
 #ifdef HW_RVL
   int x,y;
   gui_butn *button;
@@ -294,14 +282,171 @@ int FileSelector(int type)
     bg_filesel[9+i].state  &= ~IMAGE_VISIBLE;
   }
 
-  /* Select cartridge type */
+  /* System ROM selection */
+  if (type >= FILETYPE_MAX)
+  {
+    /* Save current ROM browser */
+    offset_ = offset;
+    maxfiles_ = maxfiles;
+    selection_ = selection;
+
+    /* Initialize ROM browser */
+    maxfiles = ParseDirectory();
+    selection = offset = 0;
+    while (selection < maxfiles)
+    {
+      if (strstr(config.sys_rom[type-FILETYPE_MAX], filelist[selection].filename))
+      {
+        offset = selection;
+        while ((offset > (maxfiles - 10)) && (offset > 0))
+        {
+          offset--;
+        }
+        break;
+      }
+      selection++;
+    }
+
+    /* By default, select first file in directory if ROM is not found */
+    if (selection >= maxfiles)
+    {
+      selection = 0;
+    }
+
+    /* Set menu title and cartridge label type */
+    switch (type - FILETYPE_MAX)
+    {
+      case 0:
+      {
+        strcpy(m->title,"Sega CD (USA) BIOS Selection");
+        type = FILETYPE_MD;
+        break;
+      }
+
+      case 1:
+      {
+        strcpy(m->title,"Mega CD (PAL) BIOS Selection");
+        type = FILETYPE_MD;
+        break;
+      }
+
+      case 2:
+      {
+        strcpy(m->title,"Mega CD (JAP) BIOS Selection");
+        type = FILETYPE_MD;
+        break;
+      }
+
+      case 3:
+      {
+        strcpy(m->title,"Mega Drive/Genesis BootROM Selection");
+        type = FILETYPE_MD;
+        break;
+      }
+
+      case 4:
+      {
+        strcpy(m->title,"Master System (USA) BootROM Selection");
+        type = FILETYPE_MS;
+        break;
+      }
+
+      case 5:
+      {
+        strcpy(m->title,"Master System (PAL) BootROM Selection");
+        type = FILETYPE_MS;
+        break;
+      }
+
+      case 6:
+      {
+        strcpy(m->title,"Master System (JAP) BootROM Selection");
+        type = FILETYPE_MS;
+        break;
+      }
+
+      case 7:
+      {
+        strcpy(m->title,"Game Gear BootROM Selection");
+        type = FILETYPE_GG;
+        break;
+      }
+
+      case 8:
+      {
+        strcpy(m->title,"Game Genie ROM Selection");
+        type = FILETYPE_MD;
+        break;
+      }
+
+      case 9:
+      {
+        strcpy(m->title,"Action Replay (Pro) ROM Selection");
+        type = FILETYPE_MD;
+        break;
+      }
+
+      case 10:
+      {
+        strcpy(m->title,"Sonic & Knuckles ROM Selection");
+        type = FILETYPE_MD;
+        break;
+      }
+
+      case 11:
+      {
+        strcpy(m->title,"Sonic 2 & Knuckles ROM Selection");
+        type = FILETYPE_MD;
+        break;
+      }
+    }
+  }
+  else
+  {
+    /* reset menu title */
+    strcpy(m->title, "Game Selection");
+  }
+
+  /* Set default helper for Back button */
+  strcpy(m->helpers[0]->comment, "Exit");
+
+  /* Check if we are not browsing recent file list */
   if (type >= 0)
   {
-
     /* Select cartridge type */
     bg_filesel[9 + type].data = Cart_png[type];
     bg_filesel[9 + type].state |= IMAGE_VISIBLE;
+
+    /* Get current directory */
+    char *dir = GetCurrentDirectory();
+
+    /* Get current directory name length */
+    int size = strlen(dir);
+
+    /* Check if we are not in Root directory */
+    if (size > 1)
+    {
+      if (dir[size - 2] != ':')
+      {
+        /* Update helper for Back button */
+        strcpy(m->helpers[0]->comment, "Previous Directory");
       }
+    }
+
+    /* Initialize directory icon */
+    dir_icon.texture = gxTextureOpenPNG(Browser_dir_png,0);
+    dir_icon.w = dir_icon.texture->width;
+    dir_icon.h = dir_icon.texture->height;
+    dir_icon.x = 26;
+    dir_icon.y = (26 - dir_icon.h)/2;
+  }
+
+  /* Initialize selection bar */
+  bar_over.texture = gxTextureOpenPNG(Overlay_bar_png,0);
+  bar_over.w = bar_over.texture->width;
+  bar_over.h = bar_over.texture->height;
+  bar_over.x = 16;
+  bar_over.y = (26 - bar_over.h)/2;
 
   /* Initialize Menu */
   GUI_InitMenu(m);
@@ -340,10 +485,10 @@ int FileSelector(int type)
 
             /* show selected cartridge label */
             bg_filesel[9 + type].state |= IMAGE_VISIBLE;
+          }
 
           /* default screenshot file path */
           sprintf(fname,"%s/snaps/%s/%s", DEFAULT_PATH, Cart_dir[type], filelist[selection].filename);
-          }
 
           /* restore recent type flag */
           type = -1;
@@ -376,7 +521,7 @@ int FileSelector(int type)
       }
     }
 
-    /* update helper */
+    /* update Action button helper */
     if (m->selected != -1)
     {
       /* out of focus */
@@ -390,8 +535,17 @@ int FileSelector(int type)
     else
     {
       /* this is a ROM file */
+      if (offset_ != -1)
+      {
+        /* System ROM browser */
+        strcpy(action_select.comment,"Select File");
+      }
+      else
+      {
+        /* Normal ROM browser */
         strcpy(action_select.comment,"Load File");
       }
+    }
  
     /* Draw menu*/
     GUI_DrawMenu(m);
@@ -399,6 +553,8 @@ int FileSelector(int type)
 #ifdef HW_RVL
     if (Shutdown)
     {
+      gxTextureClose(&bar_over.texture);
+      gxTextureClose(&dir_icon.texture);
       gxTextureClose(&w_pointer);
       GUI_DeleteMenu(m);
       GUI_FadeOut();
@@ -465,10 +621,10 @@ int FileSelector(int type)
     if (p & PAD_BUTTON_DOWN)
     {
       selection++;
-      if (selection == maxfiles)
+      if (selection >= maxfiles)
         selection = offset = 0;
-      if ((selection - offset) >= 10)
+      else if (selection >= (offset + 10))
-        offset += 10;
+        offset++;
     }
 
     /* highlight previous item */
@@ -479,11 +635,10 @@ int FileSelector(int type)
       {
         selection = maxfiles - 1;
         offset = maxfiles - 10;
+        if (offset < 0) offset = 0;
       }
-      if (selection < offset)
+      else if (selection < offset)
-        offset -= 10;
+        offset --;
-      if (offset < 0)
-        offset = 0;
     }
 
     /* go back one page */
@@ -494,10 +649,12 @@ int FileSelector(int type)
         selection -= 10;
         if (selection < 0)
         {
+          /* first page */
           selection = offset = 0;
         }
         else if (selection < offset)
         {
+          /* previous page */
           offset -= 10;
           if (offset < 0) offset = 0;
         }
@@ -528,8 +685,19 @@ int FileSelector(int type)
     /* quit */
     else if (p & PAD_TRIGGER_Z)
     {
+      /* System ROM selection */
+      if (offset_ != -1)
+      {
+        /* restore current ROM browser */
+        offset = offset_;
+        maxfiles = maxfiles_;
+        selection = selection_;
+      }
+
+      gxTextureClose(&bar_over.texture);
+      gxTextureClose(&dir_icon.texture);
       GUI_DeleteMenu(m);
-      return 0;
+      return -1;
     }
 
     /* previous directory */
@@ -537,12 +705,40 @@ int FileSelector(int type)
     {
       string_offset = 0;
 
+      /* recent ROM list */
+      if (type < 0)
+      {
+        /* exit */
+        gxTextureClose(&bar_over.texture);
+        gxTextureClose(&dir_icon.texture);
+        GUI_DeleteMenu(m);
+        return -1;
+      }
+
       /* update browser directory (and get current folder)*/
       if (UpdateDirectory(1, prev_folder))
       {
         /* get directory entries */
         maxfiles = ParseDirectory();
 
+        /* Get current directory */
+        char *dir = GetCurrentDirectory();
+
+        /* current directory name length */
+        int size = strlen(dir);
+
+        /* Adjust helper for back button */
+        if ((size > 1) && (dir[size - 2] != ':'))
+        {
+          /* Back button goes up one directory */
+          strcpy(m->helpers[0]->comment, "Previous Directory");
+        }
+        else
+        {
+          /* Back button exits from root directory */
+          strcpy(m->helpers[0]->comment, "Exit");
+        }
+
         /* clear selection by default */
         selection = offset = 0;
         old = -1;
@@ -564,9 +760,20 @@ int FileSelector(int type)
       }
       else
       {
-        /* exit */
+        /* System ROM selection */
+        if (offset_ != -1)
+        {
+          /* restore current ROM browser */
+          offset = offset_;
+          maxfiles = maxfiles_;
+          selection = selection_;
+        }
+
+        /* Exit */
+        gxTextureClose(&bar_over.texture);
+        gxTextureClose(&dir_icon.texture);
         GUI_DeleteMenu(m);
-        return 0;
+        return -1;
       }
     }
 
@@ -592,13 +799,29 @@ int FileSelector(int type)
         }
         else
         {
-          /* load ROM file from device */
+          int ret;
-          int ret = LoadFile(selection);
+
+          /* System ROM selection */
+          if (offset_ != -1)
+          {
+            /* return ROM file index */
+            ret = selection;
+
+            /* restore current ROM browser */
+            offset = offset_;
+            maxfiles = maxfiles_;
+            selection = selection_;
+          }
+          else
+          {
+            /* load ROM file from device then return ROM size (zero if an error occured) */
+            ret = LoadFile(selection);
+          }
 
           /* exit menu */
+          gxTextureClose(&bar_over.texture);
+          gxTextureClose(&dir_icon.texture);
           GUI_DeleteMenu(m);
-
-          /* return ROM size (or zero if an error occured) */
           return ret;
         }
       }

gx/gui/filesel.h

@@ -1,7 +1,7 @@
 /*
  *  filesel.c
  * 
- *   ROM File Browser
+ *  File Browser
  *
  *  Copyright Eke-Eke (2009-2014)
  *

gx/gui/menu.c

@@ -355,8 +355,25 @@ static gui_item items_audio[13] =
   {NULL,NULL,"High Freq: 20000 Hz",    "Adjust EQ Highest Frequency",             56,132,276,48}
 };
 
+/* System ROM paths */
+static gui_item items_rompaths[12] =
+{
+  {NULL,NULL,"CD BIOS (USA): NOT FOUND",  "Select Sega CD (USA) BIOS",            56,132,276,48},
+  {NULL,NULL,"CD BIOS (PAL): NOT FOUND",  "Select Mega CD (PAL) BIOS",            56,132,276,48},
+  {NULL,NULL,"CD BIOS (JAP): NOT FOUND",  "Select Mega CD (JAP) BIOS",            56,132,276,48},
+  {NULL,NULL,"MD BIOS (TMSS): NOT FOUND", "Select Mega Drive / Genesis BootROM",  56,132,276,48},
+  {NULL,NULL,"MS BIOS (USA): NOT FOUND",  "Select Master System (USA) BootROM",   56,132,276,48},
+  {NULL,NULL,"MS BIOS (PAL): NOT FOUND",  "Select Master System (PAL) BootROM",   56,132,276,48},
+  {NULL,NULL,"MS BIOS (JAP): NOT FOUND",  "Select Master System (JAP) BootROM",   56,132,276,48},
+  {NULL,NULL,"Game Gear BIOS: NOT FOUND", "Select Game Gear BootROM",             56,132,276,48},
+  {NULL,NULL,"Game Genie: NOT FOUND",     "Select Game Genie ROM",                56,132,276,48},
+  {NULL,NULL,"Action Replay: NOT FOUND",  "Select Action Replay (Pro) ROM",       56,132,276,48},
+  {NULL,NULL,"S&K (2MB ROM): NOT FOUND",  "Select Sonic & Knuckle main ROM",      56,132,276,48},
+  {NULL,NULL,"S2&K (256K ROM): NOT FOUND","Select Sonic 2 & Knuckle upmem ROM",   56,132,276,48},
+};
+
 /* System options */
-static gui_item items_system[10] =
+static gui_item items_system[11] =
 {
   {NULL,NULL,"Console Hardware: AUTO",  "Select system hardware model",                56,132,276,48},
   {NULL,NULL,"Console Region: AUTO",    "Select system region",                        56,132,276,48},
@@ -367,6 +384,7 @@ static gui_item items_system[10] =
   {NULL,NULL,"68k Address Error: ON",   "Enable/disable 68k address error exceptions", 56,132,276,48},
   {NULL,NULL,"Lock-on: OFF",            "Select Lock-On cartridge type",               56,132,276,48},
   {NULL,NULL,"Cartridge Swap: OFF",     "Enable/disable cartridge hot swap",           56,132,276,48},
+  {NULL,NULL,"BIOS & Lock-On ROM paths","Configure BIOS & Lock-On ROM paths",          56,132,276,48},
   {NULL,NULL,"SVP Cycles: 1500",        "Adjust SVP chip emulation speed",             56,132,276,48}
 };
 
@@ -378,7 +396,7 @@ static gui_item items_video[16] =
 #endif
 {
   {NULL,NULL,"Display: PROGRESSIVE",     "Select video mode",                          56,132,276,48},
-  {NULL,NULL,"TV mode: 50/60Hz",         "Select video refresh rate",                  56,132,276,48},
+  {NULL,NULL,"TV mode: 50/60HZ",         "Select video refresh rate",                  56,132,276,48},
   {NULL,NULL,"VSYNC: AUTO",              "Enable/disable sync with Video Hardware",    56,132,276,48},
   {NULL,NULL,"GX Bilinear Filter: OFF",  "Enable/disable texture hardware filtering",  56,132,276,48},
   {NULL,NULL,"GX Deflickering Filter: OFF","Enable/disable GX hardware filtering",     56,132,276,48},
@@ -582,6 +600,20 @@ static gui_menu menu_options =
   NULL
 };
 
+/* System ROM Path submenu */
+static gui_menu menu_rompaths =
+{
+  "System ROM Paths",
+  0,0,
+  12,4,6,0,
+  items_rompaths,
+  buttons_list,
+  bg_list,
+  {&action_cancel, &action_select},
+  {&arrow_up,&arrow_down},
+  NULL
+};
+
 /* System Options menu */
 static gui_menu menu_system =
 {
@@ -1107,6 +1139,98 @@ static void soundmenu ()
   GUI_DeleteMenu(m);
 }
 
+/****************************************************************************
+ * System ROM paths menu
+ *
+ ****************************************************************************/
+
+static void rompathmenu ()
+{
+  FILE *f;
+  int i, ret;
+  gui_menu *m = &menu_rompaths;
+  gui_item *items = m->items;
+  
+  for (i=0; i<12; i++)
+  {
+    f = fopen(config.sys_rom[i],"rb");
+    if (f)
+    {
+      strcpy(strstr(items[i].text,":") + 2, "FOUND");
+      fclose(f);
+    }
+    else
+    {
+      strcpy(strstr(items[i].text,":") + 2, "NOT FOUND");
+    }
+  }
+
+  GUI_InitMenu(m);
+
+  while (1)
+  {
+    ret = GUI_RunMenu(m);
+
+    switch (ret)
+    {
+      case -1:
+      {
+        GUI_DeleteMenu(m);
+        return;
+      }
+
+      default:
+      {
+        /* Initialize System ROM browser */
+        if (OpenDirectory(config.l_device, ret + FILETYPE_MAX))
+        {
+          /* Open System ROM browser */
+          GUI_DeleteMenu(m);
+          i = FileSelector(ret + FILETYPE_MAX);
+
+          /* Get current System ROM path */
+          char *dir = GetCurrentDirectory();
+
+          /* System ROM selected ? */
+          if (i >= 0)
+          {
+            /* full System ROM pathname */
+            sprintf(config.sys_rom[ret],"%s%s",dir,filelist[i].filename);
+
+            /* mark System ROM as found */
+            strcpy(strstr(items[ret].text,":") + 2, "FOUND");
+
+            /* Genesis BOOT ROM special case */
+            if (config.sys_rom[ret] == MD_BIOS)
+            {
+              /* Genesis BOOT ROM must be reloaded */
+              if (load_archive(MD_BIOS, boot_rom, 0x800, NULL) > 0)
+              {
+                /* check if BOOT ROM header is valid */
+                if (!memcmp((char *)(boot_rom + 0x120),"GENESIS OS", 10))
+                {
+                  /* mark Genesis BIOS as loaded */
+                  system_bios |= SYSTEM_MD;
+                }
+                else
+                {
+                  /* mark Genesis BIOS as unloaded */
+                  system_bios &= ~SYSTEM_MD;
+                }
+              }
+            }
+          }
+
+          free(dir);
+          GUI_InitMenu(m);
+        }
+      }
+    }
+  }
+
+  GUI_DeleteMenu(m);
+}
+
 /****************************************************************************
  * System Settings menu
  *
@@ -1149,9 +1273,9 @@ static void systemmenu ()
   else if (config.region_detect == 1)
     sprintf (items[1].text, "Console Region: USA");
   else if (config.region_detect == 2)
-    sprintf (items[1].text, "Console Region: EUROPE");
+    sprintf (items[1].text, "Console Region: PAL");
   else if (config.region_detect == 3)
-    sprintf (items[1].text, "Console Region: JAPAN");
+    sprintf (items[1].text, "Console Region: JAP");
 
   if (config.vdp_mode == 0)
     sprintf (items[2].text, "VDP Mode: AUTO");
@@ -1184,12 +1308,12 @@ static void systemmenu ()
 
   if (svp)
   {
-    sprintf (items[9].text, "SVP Cycles: %d", SVP_cycles);
+    sprintf (items[10].text, "SVP Cycles: %d", SVP_cycles);
-    m->max_items = 10;
+    m->max_items = 11;
   }
   else
   {
-    m->max_items = 9;
+    m->max_items = 10;
   }
 
   GUI_InitMenu(m);
@@ -1308,9 +1432,9 @@ static void systemmenu ()
         else if (config.region_detect == 1)
           sprintf (items[1].text, "Console Region: USA");
         else if (config.region_detect == 2)
-          sprintf (items[1].text, "Console Region: EUR");
+          sprintf (items[1].text, "Console Region: PAL");
         else if (config.region_detect == 3)
-          sprintf (items[1].text, "Console Region: JAPAN");
+          sprintf (items[1].text, "Console Region: JAP");
 
         /* force system reinitialization + region BIOS */
         reinit = 2;
@@ -1431,10 +1555,18 @@ static void systemmenu ()
         break;
       }
 
-      case 9:  /*** SVP cycles per line ***/
+      case 9:  /*** System ROM paths ***/
+      {
+        GUI_DeleteMenu(m);
+        rompathmenu();
+        GUI_InitMenu(m);
+        break;
+      }
+
+      case 10:  /*** SVP cycles per line ***/
       {
         GUI_OptionBox(m,0,"SVP Cycles",(void *)&SVP_cycles,1,1,1500,1);
-        sprintf (items[9].text, "SVP Cycles: %d", SVP_cycles);
+        sprintf (items[10].text, "SVP Cycles: %d", SVP_cycles);
         break;
       }
 
@@ -2930,11 +3062,12 @@ static void optionmenu(void)
 *
 ****************************************************************************/
 static t_slot slots[5];
+static gx_texture *star;
+
 static void savemenu_cb(void)
 {
   int i;
   char msg[16];
-  gx_texture *star = gxTextureOpenPNG(Star_full_png,0);
   
   if (sram.on)
   {
@@ -2974,7 +3107,6 @@ static void savemenu_cb(void)
     if (i == config.s_default)
       gxDrawTexture(star,22,buttons_saves[i].y+(buttons_saves[i].h-star->height)/2,star->width,star->height,255);
   }
-  gxTextureClose(&star);
 }
 
 static int savemenu(void)
@@ -2986,6 +3118,7 @@ static int savemenu(void)
   gui_menu *m = &menu_saves;
   FILE *snap;
 
+  star = gxTextureOpenPNG(Star_full_png,0);
   GUI_InitMenu(m);
   GUI_DrawMenuFX(m,30,0);
 
@@ -3249,6 +3382,7 @@ static int savemenu(void)
   m->bg_images[5].state |= IMAGE_SLIDE_TOP;
   GUI_DrawMenuFX(m,30,1);
   GUI_DeleteMenu(m);
+  gxTextureClose(&star);
   return ret;
 }
 
@@ -3294,7 +3428,7 @@ static int loadgamemenu ()
         if (ret)
         {
           GUI_DeleteMenu(m);
-          if (FileSelector(filetype))
+          if (FileSelector(filetype) > 0)
           {
             /* directly jump to game */
             return 1;
@@ -3540,9 +3674,12 @@ static void mainmenu_cb(void)
   int status = areplay_get_status();
 
   /* Action Replay Switch current status */
-  if (status == AR_SWITCH_TRAINER) strcpy(temp,"TM");
+  if (status == AR_SWITCH_TRAINER)
-  else if (status == AR_SWITCH_ON) strcpy(temp,"ON");
+    strcpy(temp,"TM");
-  else strcpy(temp,"OFF");
+  else if (status == AR_SWITCH_ON)
+    strcpy(temp,"ON");
+  else
+    strcpy(temp,"OFF");
 
   /* Display informations */
   if (m->selected == 6)

gx/main.c

@@ -110,16 +110,11 @@ static void init_machine(void)
   /* mark all BIOS as unloaded */
   system_bios = 0;
 
-  /* Genesis BOOT ROM support (2KB max) */
+  /* try to load Genesis BOOT ROM (2KB max) */
   memset(boot_rom, 0xFF, 0x800);
-  FILE *fp = fopen(MD_BIOS, "rb");
+  if (load_archive(MD_BIOS, boot_rom, 0x800, NULL) > 0)
-  if (fp != NULL)
   {
-    /* read BOOT ROM */
+    /* check if BOOT ROM header is valid */
-    fread(boot_rom, 1, 0x800, fp);
-    fclose(fp);
-
-    /* check BOOT ROM */
     if (!memcmp((char *)(boot_rom + 0x120),"GENESIS OS", 10))
     {
       /* mark Genesis BIOS as loaded */

gx/osd.h

@@ -37,18 +37,19 @@
 /*************************************************/
 /* required by Genesis Plus GX core              */
 /*************************************************/
-#define GG_ROM        "/genplus/lock-on/ggenie.bin"
+#define CD_BIOS_US    config.sys_rom[0]
-#define AR_ROM        "/genplus/lock-on/areplay.bin"
+#define CD_BIOS_EU    config.sys_rom[1]
-#define SK_ROM        "/genplus/lock-on/sk.bin"
+#define CD_BIOS_JP    config.sys_rom[2]
-#define SK_UPMEM      "/genplus/lock-on/sk2chip.bin"
+#define MD_BIOS       config.sys_rom[3]
-#define MS_BIOS_US    "/genplus/bios/bios_U.sms"
+#define MS_BIOS_US    config.sys_rom[4]
-#define MS_BIOS_EU    "/genplus/bios/bios_E.sms"
+#define MS_BIOS_EU    config.sys_rom[5]
-#define MS_BIOS_JP    "/genplus/bios/bios_J.sms"
+#define MS_BIOS_JP    config.sys_rom[6]
-#define GG_BIOS       "/genplus/bios/bios.gg"
+#define GG_BIOS       config.sys_rom[7]
-#define MD_BIOS       "/genplus/bios/bios_MD.bin"
+#define GG_ROM        config.sys_rom[8]
-#define CD_BIOS_US    "/genplus/bios/bios_CD_U.bin"
+#define AR_ROM        config.sys_rom[9]
-#define CD_BIOS_EU    "/genplus/bios/bios_CD_E.bin"
+#define SK_ROM        config.sys_rom[10]
-#define CD_BIOS_JP    "/genplus/bios/bios_CD_J.bin"
+#define SK_UPMEM      config.sys_rom[11]
+
 #define CD_BRAM_US    "/genplus/saves/cd/scd_U.brm"
 #define CD_BRAM_EU    "/genplus/saves/cd/scd_E.brm"
 #define CD_BRAM_JP    "/genplus/saves/cd/scd_J.brm"