diff --git a/support/makebin/makebin.c b/support/makebin/makebin.c
index ed41d3d..ed17286 100644
--- a/support/makebin/makebin.c
+++ b/support/makebin/makebin.c
@@ -20,20 +20,21 @@
      in a product, an acknowledgment in the product documentation would be
      appreciated but is not required.
   2. Altered source versions must be plainly marked as such, and must not be
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
 
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdbool.h>
 #include <string.h>
 #include <ctype.h>
 
 #if defined(_WIN32)
 #include <fcntl.h>
 #include <io.h>
 #else
 #include <unistd.h>
 #endif
 
@@ -109,20 +110,21 @@ usage (void)
            "  -ya n          number of ram banks (default: 0)\n"
            "  -yt n          MBC type (default: no MBC)\n"
            "  -yl n          old licensee code (default: 0x33)\n"
            "  -yk cc         new licensee string (default: 00)\n"
            "  -yn name       cartridge name (default: none)\n"
            "  -yc            GameBoy Color compatible\n"
            "  -yC            GameBoy Color only\n"
            "  -ys            Super GameBoy\n"
            "  -yS            Convert .noi file named like input file to .sym\n"
            "  -yj            set non-Japanese region flag\n"
+           "  -yN            do not copy big N validation logo into ROM header\n"
            "  -yp addr=value Set address in ROM to given value (address 0x100-0x1FE)\n"
            "Arguments:\n"
            "  <in_file>      optional IHX input file, '-' means stdin. (default: stdin)\n"
            "  <out_file>     optional output file, '-' means stdout. (default: stdout)\n");
 }
 
 #define CART_NAME_LEN 16
 
 struct gb_opt_s
 {
@@ -130,20 +132,21 @@ struct gb_opt_s
   char licensee_str[2];           /* new licensee string */
   BYTE mbc_type;                  /* MBC type (default: no MBC) */
   short nb_rom_banks;             /* Number of rom banks (default: 2) */
   BYTE nb_ram_banks;              /* Number of ram banks (default: 0) */
   BYTE licensee_id;               /* old licensee code */
   BYTE is_gbc;                    /* 1 if GBC compatible, 2 if GBC only, false for all other*/
   BYTE is_sgb;                    /* True if SGB, false for all other*/
   BYTE sym_conversion;            /* True if .noi file should be converted to .sym (default false)*/
   BYTE non_jp;                    /* True if non-Japanese region, false for all other*/
   BYTE rom_banks_autosize;        /* True if rom banks should be auto-sized (default false)*/
+  bool do_logo_copy;              /* True if the nintendo logo should be copied into the ROM (default true) */
   BYTE address_overwrite[16];     /* For limited compatibility with very old versions */
 };
 
 struct sms_opt_s
 {
   BYTE rom_size;                  /* Doesn't have to be the real size, needed for checksum */
   BYTE region_code;               /* Region code Japan/Export/International and SMS/GG */
   BYTE version;                   /* Game version */
 };
 
@@ -158,21 +161,24 @@ gb_postproc (BYTE * rom, int size, int *real_size, struct gb_opt_s *o)
       0x00, 0x08, 0x11, 0x1f, 0x88, 0x89, 0x00, 0x0e,
       0xdc, 0xcc, 0x6e, 0xe6, 0xdd, 0xdd, 0xd9, 0x99,
       0xbb, 0xbb, 0x67, 0x63, 0x6e, 0x0e, 0xec, 0xcc,
       0xdd, 0xdc, 0x99, 0x9f, 0xbb, 0xb9, 0x33, 0x3e
     };
 
   /* $0104-$0133: Nintendo logo
    * If missing, an actual Game Boy won't run the ROM.
    */
 
-  memcpy (&rom[0x104], gb_logo, sizeof (gb_logo));
+  if (o->do_logo_copy)
+    {
+      memcpy (&rom[0x104], gb_logo, sizeof (gb_logo));
+    }
 
   rom[0x144] = o->licensee_str[0];
   rom[0x145] = o->licensee_str[1];
 
   /*
    * 0134-0142: Title of the game in UPPER CASE ASCII. If it
    * is less than 16 characters then the
    * remaining bytes are filled with 00's.
    */
 
@@ -682,22 +688,38 @@ int
 main (int argc, char **argv)
 {
   int size = 32768, pack = 0, real_size = 0, i = 0;
   char *token;
   BYTE *rom;
   FILE *fin, *fout;
   char *filename = NULL;
   int ret;
   int gb = 0;
   int sms = 0;
-  struct gb_opt_s gb_opt = { "", {'0', '0'}, 0, 2, 0, 0x33, 0, 0, 0, 0, 0, {0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0}};
-  struct sms_opt_s sms_opt = { 0xa, 7, 0 };
+
+  struct gb_opt_s gb_opt = {.cart_name="",
+                            .licensee_str={'0', '0'},
+                            .mbc_type=0,
+                            .nb_rom_banks=2,
+                            .nb_ram_banks=0,
+                            .licensee_id=0x33,
+                            .is_gbc=0,
+                            .is_sgb=0,
+                            .sym_conversion=0,
+                            .non_jp=0,
+                            .rom_banks_autosize=0,
+                            .do_logo_copy=true,
+                            .address_overwrite={0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0, 0xFF, 0} };
+
+  struct sms_opt_s sms_opt = {.rom_size=0xa,
+                              .region_code=7,
+                              .version=0 };
 
 #if defined(_WIN32)
   setmode (fileno (stdout), O_BINARY);
 #endif
 
   while (*++argv && '-' == argv[0][0] && '\0' != argv[0][1])
     {
       switch (argv[0][1])
         {
         case 's':
@@ -794,20 +816,24 @@ main (int argc, char **argv)
               break;
 
             case 'c':
               gb_opt.is_gbc = 1;
               break;
 
             case 'C':
               gb_opt.is_gbc = 2;
               break;
 
+            case 'N':
+              gb_opt.do_logo_copy = false; // when switch is present, turn off logo copy
+              break;
+
             case 's':
               gb_opt.is_sgb = 1;
               break;
 
             case 'S':
               gb_opt.sym_conversion = 1;
               break;
 
             case 'j':
               gb_opt.non_jp = 1;