diff --git a/lib/CPUs/MIPS/tools/src/romgen.c b/lib/CPUs/MIPS/tools/src/romgen.c
index 02df5bc..60c00c3 100644
--- a/lib/CPUs/MIPS/tools/src/romgen.c
+++ b/lib/CPUs/MIPS/tools/src/romgen.c
@@ -3,11 +3,54 @@
 #include <string.h>
 #include <math.h>
 
+#define INT8    char
+#define INT16   short
+#define INT32   long
+#define UINT8   unsigned char
+#define UINT16  unsigned short
+#define UINT32  unsigned long
+#define INT     int
+#define UINT    unsigned int
+#define FLOAT32 float
+#define FLOAT64 double
+
 #define ARCH_NAME			"data"
 #define ENT_NAME			"rom"
 #define JTAG_ADDR_WIDTH		16
 
+UINT32 g_endianess_EB;
+
 // --------------------------------------------------------------
+UINT32 conv_endian32(UINT32 src)
+{
+	UINT32 dst;
+
+	dst = (0xFF000000 & (src << 24))
+		| (0x00FF0000 & (src << 8))
+		| (0x0000FF00 & (src >> 8))
+		| (0x000000FF & (src >> 24));
+
+	return dst;
+};
+
+UINT32 to_big_endian32(UINT32 src)
+{
+#ifndef NATIVE_IS_BIG_ENDIAN
+	return conv_endian32(src);
+#else
+	return src;
+#endif
+}
+
+UINT32 from_big_endian32(UINT32 src)
+{
+#ifndef NATIVE_IS_BIG_ENDIAN
+	return conv_endian32(src);
+#else
+	return src;
+#endif
+}
+
 void basename(char *pSrc, char *pDst)
 {
 	int i, size;
@@ -90,7 +133,11 @@ int SaveROM(char *pFilenameIn, char *pFilenameOut, char *pArchName, char *pEntNa
 	for (i=0; i < filesize; i += sizeof(int))
 	{
 		fread(&word, 1, sizeof(int), pFileIn);
-		fprintf(pFileOut, "\t\tX\"%8.8X\"", word);
+		if (g_endianess_EB)
+			fprintf(pFileOut, "\t\tX\"%8.8X\"", to_big_endian32(word));
+		else
+			fprintf(pFileOut, "\t\tX\"%8.8X\"", word);
+
 		if (i < (romsize-sizeof(int)))
 			fprintf(pFileOut, ", -- %8.8X\n", i);
 		else
@@ -208,7 +255,11 @@ int SaveROM_V4LD(char *pFilenameIn, char *pFilenameOut, char *pArchName, char *p
 	for (i=0; i < filesize; i += sizeof(int))
 	{
 		fread(&word, 1, sizeof(int), pFileIn);
-		fprintf(pFileOut, "\t\tX\"%8.8X\"", word);
+		if (g_endianess_EB)
+			fprintf(pFileOut, "\t\tX\"%8.8X\"", to_big_endian32(word));
+		else
+			fprintf(pFileOut, "\t\tX\"%8.8X\"", word);
+
 		if (i < (romsize-sizeof(int)))
 			fprintf(pFileOut, ", -- %8.8X\n", i);
 		else
@@ -314,7 +365,10 @@ int SaveROM_TCL(char *pFilenameIn, char *pFilenameOut, char *pArchName, char *pE
 	for (i=0; i < filesize; i += sizeof(int))
 	{
 		fread(&word, 1, sizeof(int), pFileIn);
-		fprintf(pFileOut, "::chipscope::csejtag_tap shift_device_dr $handle $devid $CSE_OP $CSE_ES 0 %d \"%4.4X%8.8X\"\n", nbits_data + JTAG_ADDR_WIDTH, word_addr, word);
+		if (g_endianess_EB)
+			fprintf(pFileOut, "::chipscope::csejtag_tap shift_device_dr $handle $devid $CSE_OP $CSE_ES 0 %d \"%4.4X%8.8X\"\n", nbits_data + JTAG_ADDR_WIDTH, word_addr, to_big_endian32(word));
+		else
+			fprintf(pFileOut, "::chipscope::csejtag_tap shift_device_dr $handle $devid $CSE_OP $CSE_ES 0 %d \"%4.4X%8.8X\"\n", nbits_data + JTAG_ADDR_WIDTH, word_addr, word);
 		word_addr++;
 	}
 	fprintf(pFileOut, "\n");
@@ -345,13 +399,19 @@ int main(int argc, char *argv[])
 
 	if (argc < 2)
 	{
-		fprintf(stderr, "Usage: romgen <input file> <num. word address bits>\n");
+		fprintf(stderr, "Usage: romgen <input file> <num. word address bits> [{EL|EB}]\n");
 		return 1;
 	}
 
 	pFilenameIn = argv[1];
-	if (argc == 3)
-		nbits_addr = atoi(argv[2]);
+	nbits_addr = atoi(argv[2]);
+
+	g_endianess_EB = 0;
+	if (argc == 4)
+	{
+		if ((toupper(argv[3][0]) == 'E') && (toupper(argv[3][1]) == 'B'))
+			g_endianess_EB = 1;
+	}
 
 
 	basename(pFilenameIn, name_prj);