diff --git a/flash_rom.c b/flash_rom.c
index fc940f9..a4bb986 100644
--- a/flash_rom.c
+++ b/flash_rom.c
@@ -59,33 +59,30 @@
 	{"SST28SF040A", SST_ID,     SST_28SF040,  NULL, 512, 256,
 	 probe_28sf040, erase_28sf040, write_28sf040, NULL},
 	{"SST39SF020A", SST_ID,     SST_39SF020,  NULL, 256, 4096,
-	 probe_39sf020, erase_39sf020, write_39sf020, NULL},
+	 probe_jedec,   erase_jedec, write_39sf020, NULL},
 	{"SST39VF020",  SST_ID,     SST_39VF020,  NULL, 256, 4096,
-	 probe_39sf020, erase_39sf020, write_39sf020, NULL},
+	 probe_jedec,   erase_jedec, write_39sf020, NULL},
 	{"SST49LF040",  SST_ID,     SST_49LF040,  NULL, 512, 4096,
-	 probe_49lf040, erase_49lf040, write_49lf040, NULL},
+	 probe_jedec,   erase_jedec, write_49lf040, NULL},
 	{"SST49LF080A", SST_ID,     SST_49LF080A,  NULL, 1024, 4096,
-	 probe_49lf040, erase_49lf040, write_49lf040, NULL},
+	 probe_jedec,   erase_jedec, write_49lf040, NULL},
 	{"SST49LF002A", SST_ID,     SST_49LF002A,  NULL, 256, 4096,
-	 probe_49lf040, erase_49lf040, write_49lf040, NULL},
+	 probe_jedec,   erase_jedec, write_49lf040, NULL},
 	{"SST49LF003A", SST_ID,     SST_49LF003A,  NULL, 384, 4096,
-	 probe_49lf040, erase_49lf040, write_49lf040, NULL},
+	 probe_jedec,   erase_jedec, write_49lf040, NULL},
 	{"SST49LF004A", SST_ID,     SST_49LF004A,  NULL, 512, 4096,
-	 probe_49lf040, erase_49lf040, write_49lf040, NULL},
+	 probe_jedec,   erase_jedec, write_49lf040, NULL},
 	{"SST49LF008A", SST_ID,     SST_49LF008A,  NULL, 1024, 4096,
-	 probe_49lf040, erase_49lf040, write_49lf040, NULL},
-	
-	//By LYH begin
+	 probe_jedec,   erase_jedec, write_49lf040, NULL},
 	{"Pm49FL004",   PMC_ID,     PMC_49FL004,  NULL, 512, 64*1024,
-	 probe_49fl004, erase_49fl004, write_49fl004, NULL},
-	//END
+	 probe_jedec,   erase_jedec, write_49fl004, NULL},
 	{"W29C011",     WINBOND_ID, W_29C011,    NULL, 128, 128,
 	 probe_jedec,   erase_jedec,   write_jedec, NULL},
 	{"W29C020C",    WINBOND_ID, W_29C020C,    NULL, 256, 128,
 	 probe_jedec,   erase_jedec,   write_jedec, NULL},
 	{"W49F002U",    WINBOND_ID, W_49F002U,    NULL, 256, 128,
-	 probe_49f002,  erase_49f002,   write_49f002, NULL},
-	{"M29F400BT",   ST_ID, ST_M29F400BT ,    NULL, 512, 64*1024,
+	 probe_jedec,   erase_jedec,   write_49f002, NULL},
+	{"M29F400BT",   ST_ID,      ST_M29F400BT ,NULL, 512, 64*1024,
 	 probe_m29f400bt,   erase_m29f400bt,   write_linuxbios_m29f400bt, NULL},
 	{"82802ab",     137,   173 ,    NULL, 512, 64*1024,
 	 probe_82802ab, erase_82802ab,   write_82802ab, NULL},
@@ -253,7 +250,7 @@
 			exit(1);
 		}
 		printf("Reading Flash...");
-		if(flash->read == NULL)
+		if (flash->read == NULL)
 			memcpy(buf, (const char *) flash->virt_addr, size);
 		else
 			flash->read (flash, buf);
diff --git a/jedec.c b/jedec.c
index bb4a874..2f153db 100644
--- a/jedec.c
+++ b/jedec.c
@@ -30,44 +30,89 @@
 
 int probe_jedec (struct flashchip * flash)
 {
-	volatile char * bios = flash->virt_addr;
-	unsigned char  id1, id2;
+        volatile char * bios = flash->virt_addr;
+        unsigned char  id1, id2;
 
-	*(volatile char *) (bios + 0x5555) = 0xAA;
-	*(volatile char *) (bios + 0x2AAA) = 0x55;
-	*(volatile char *) (bios + 0x5555) = 0x90;
+        *(volatile char *) (bios + 0x5555) = 0xAA;
+        myusec_delay(10);
+        *(volatile char *) (bios + 0x2AAA) = 0x55;
+        myusec_delay(10);
+        *(volatile char *) (bios + 0x5555) = 0x90;
+        myusec_delay(10);
 
-	myusec_delay(10);
+        id1 = *(volatile unsigned char *) bios;
+        id2 = *(volatile unsigned char *) (bios + 0x01);
 
-	id1 = *(volatile unsigned char *) bios;
-	id2 = *(volatile unsigned char *) (bios + 0x01);
-
-	*(volatile char *) (bios + 0x5555) = 0xAA;
-	*(volatile char *) (bios + 0x2AAA) = 0x55;
-	*(volatile char *) (bios + 0x5555) = 0xF0;
-
-	myusec_delay(10);
+        *(volatile char *) (bios + 0x5555) = 0xAA;
+        myusec_delay(10);
+        *(volatile char *) (bios + 0x2AAA) = 0x55;
+        myusec_delay(10);
+        *(volatile char *) (bios + 0x5555) = 0xF0;
+        myusec_delay(10);
 
 	printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
-	if (id1 == flash->manufacture_id && id2 == flash->model_id)
-		return 1;
+        if (id1 == flash->manufacture_id && id2 == flash->model_id)
+                return 1;
 
-	return 0;
+        return 0;
+}
+
+int erase_sector_jedec (volatile char * bios, unsigned int page)
+{
+	/* Chip erase function does not exist for LPC mode on 49lf040.
+	 * Erase sector-by-sector instead. */
+	volatile unsigned char *Temp;
+
+        /*  Issue the Sector Erase command to 40LF040   */
+        Temp  = bios + 0x5555; 	/* set up address to be C000:5555h      */
+        *Temp = 0xAA;		/* write data 0xAA to the address       */
+	myusec_delay(10);
+        Temp  = bios + 0x2AAA;	/* set up address to be C000:2AAAh      */
+        *Temp = 0x55;		/* write data 0x55 to the address       */
+	myusec_delay(10);
+        Temp  = bios + 0x5555;	/* set up address to be C000:5555h      */
+        *Temp = 0x80;		/* write data 0x80 to the address       */
+	myusec_delay(10);
+        Temp  = bios + 0x5555;	/* set up address to be C000:5555h      */
+        *Temp = 0xAA;		/* write data 0xAA to the address       */
+	myusec_delay(10);
+        Temp  = bios + 0x2AAA;	/* set up address to be C000:2AAAh      */
+        *Temp = 0x55;		/* write data 0x55 to the address       */
+	myusec_delay(10);
+        Temp  = bios + page;	/* set up address to be the current sector */
+        *Temp = 0x30;		/* write data 0x30 to the address       */
+	
+	/* wait for Toggle bit ready         */
+	toggle_ready_jedec(bios);
+
+	return(0);
 }
 
 int erase_jedec (struct flashchip * flash)
 {
-	volatile char * bios = flash->virt_addr;
+	volatile unsigned char * bios = flash->virt_addr;
+	volatile unsigned char *Temp;
 
-	*(volatile char *) (bios + 0x5555) = 0xAA;
-	*(volatile char *) (bios + 0x2AAA) = 0x55;
-	*(volatile char *) (bios + 0x5555) = 0x80;
-
-	*(volatile char *) (bios + 0x5555) = 0xAA;
-	*(volatile char *) (bios + 0x2AAA) = 0x55;
-	*(volatile char *) (bios + 0x5555) = 0x10;
-
+        /*  Issue the Sector Erase command to 39SF020   */
+        Temp  = bios + 0x5555;	/* set up address to be C000:5555h      */
+        *Temp = 0xAA;		/* write data 0xAA to the address       */
 	myusec_delay(10);
+        Temp  = bios + 0x2AAA;	/* set up address to be C000:2AAAh      */
+        *Temp = 0x55;		/* write data 0x55 to the address       */
+	myusec_delay(10);
+        Temp  = bios + 0x5555;	/* set up address to be C000:5555h      */
+        *Temp = 0x80;		/* write data 0x80 to the address       */
+	myusec_delay(10);
+        Temp  = bios + 0x5555;	/* set up address to be C000:5555h      */
+        *Temp = 0xAA;		/* write data 0xAA to the address       */
+	myusec_delay(10);
+        Temp  = bios + 0x2AAA;	/* set up address to be C000:2AAAh      */
+        *Temp = 0x55;		/* write data 0x55 to the address       */
+	myusec_delay(10);
+        Temp  = bios + 0x5555;	/* set up address to be C000:5555h      */
+        *Temp = 0x10;		/* write data 0x55 to the address       */
+	myusec_delay(10);
+
 	toggle_ready_jedec(bios);
 
 	return(0);
diff --git a/jedec.h b/jedec.h
index 40261fd..0b00c26 100644
--- a/jedec.h
+++ b/jedec.h
@@ -45,6 +45,8 @@
 	usleep(200);
 }
 
+extern int erase_sector_jedec (volatile char * bios, unsigned int page);
+
 extern __inline__ void write_page_jedec (volatile char * bios, char * src, volatile char * dst,
 					 int page_size)
 {
@@ -63,4 +65,40 @@
 	toggle_ready_jedec(dst-1);
 }
 
+static __inline__ int write_sector_jedec(volatile char * bios, 
+					 unsigned char * src,
+					 volatile unsigned char * dst, 
+					 unsigned int page_size)
+{
+	int i;
+	volatile char *Temp;
+
+	for (i = 0; i < page_size; i++) {
+		if (*dst != 0xff) {
+			printf("FATAL: dst %p not erased (val 0x%x\n", dst, *dst);
+			return(-1);
+		}
+		/* transfer data from source to destination */
+		if (*src == 0xFF) {
+			dst++, src++;
+			/* If the data is 0xFF, don't program it */
+			continue;
+		}
+		Temp =   (bios + 0x5555); 
+		*Temp = 0xAA;                   
+		Temp =  bios + 0x2AAA; 
+		*Temp = 0x55; 
+		Temp =  bios + 0x5555; 
+		*Temp = 0xA0;                   
+		*dst = *src;
+		toggle_ready_jedec(bios);
+		if (*dst != *src)
+			printf("BAD! dst 0x%lx val 0x%x src 0x%x\n",
+			       (unsigned long)dst, *dst, *src);
+		dst++, src++;
+	}
+
+	return(0);
+}
+
 #endif /* !__JEDEC_H__ */
diff --git a/pm49fl004.c b/pm49fl004.c
index 3e4e877..25921c6 100644
--- a/pm49fl004.c
+++ b/pm49fl004.c
@@ -35,23 +35,23 @@
 {
         volatile unsigned char *Temp;
 
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0xAA;            /* write data 0xAA to the address       */
+        Temp  = bios + 0x5555;	/* set up address to be C000:5555h      */
+        *Temp = 0xAA;		/* write data 0xAA to the address       */
         myusec_delay(10);
-        Temp  = bios + 0x2AAA; /* set up address to be C000:2AAAh      */
-        *Temp = 0x55;         /* write data 0x55 to the address       */
+        Temp  = bios + 0x2AAA;	/* set up address to be C000:2AAAh      */
+        *Temp = 0x55;		/* write data 0x55 to the address       */
         myusec_delay(10);
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0x80;            /* write data 0x80 to the address       */
+        Temp  = bios + 0x5555;	/* set up address to be C000:5555h      */
+        *Temp = 0x80;		/* write data 0x80 to the address       */
         myusec_delay(10);
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0xAA;         /* write data 0xAA to the address       */
+        Temp  = bios + 0x5555;	/* set up address to be C000:5555h      */
+        *Temp = 0xAA;		/* write data 0xAA to the address       */
         myusec_delay(10);
-        Temp  = bios + 0x2AAA; /* set up address to be C000:2AAAh      */
-        *Temp = 0x55;          /* write data 0x55 to the address       */
+        Temp  = bios + 0x2AAA;	/* set up address to be C000:2AAAh      */
+        *Temp = 0x55;		/* write data 0x55 to the address       */
         myusec_delay(10);
-        Temp  = bios + address; /* set up address to be C000:5555h      */
-        *Temp = 0x50;       /* write data 0x55 to the address       */
+        Temp  = bios + address;	/* set up address to be C000:5555h      */
+        *Temp = 0x50;		/* write data 0x50 to the address       */
 
 	/* wait for Toggle bit ready         */
         toggle_ready_jedec(bios);
@@ -95,66 +95,6 @@
 	return(0);
 }
 
-int probe_49fl004 (struct flashchip * flash)
-{
-        volatile char * bios = flash->virt_addr;
-        unsigned char  id1, id2;
-
-        *(volatile char *) (bios + 0x5555) = 0xAA;
-        myusec_delay(10);
-        *(volatile char *) (bios + 0x2AAA) = 0x55;
-        myusec_delay(10);
-        *(volatile char *) (bios + 0x5555) = 0x90;
-
-        myusec_delay(10);
-
-        id1 = *(volatile unsigned char *) bios;
-        id2 = *(volatile unsigned char *) (bios + 0x01);
-
-        *(volatile char *) (bios + 0x5555) = 0xAA;
-        *(volatile char *) (bios + 0x2AAA) = 0x55;
-        *(volatile char *) (bios + 0x5555) = 0xF0;
-
-        myusec_delay(10);
-
-	printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
-
-        if (id1 == flash->manufacture_id && id2 == flash->model_id)
-                return 1;
-
-        return 0;
-}
-
-int erase_49fl004 (struct flashchip * flash)
-{
-	volatile unsigned char * bios = flash->virt_addr;
-	volatile unsigned char *Temp;
-
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0xAA;            /* write data 0xAA to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x2AAA; /* set up address to be C000:2AAAh      */
-        *Temp = 0x55;         /* write data 0x55 to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0x80;            /* write data 0x80 to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0xAA;         /* write data 0xAA to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x2AAA; /* set up address to be C000:2AAAh      */
-        *Temp = 0x55;          /* write data 0x55 to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0x10;       /* write data 0x10  to the address       */
-
-
-        /* wait for Toggle bit ready         */
-        toggle_ready_jedec(bios);
-
-	return(0);
-}
-
 int write_49fl004 (struct flashchip * flash, unsigned char * buf)
 {
 	int i;
diff --git a/sst39sf020.c b/sst39sf020.c
index 3d23adf..5cc4683 100644
--- a/sst39sf020.c
+++ b/sst39sf020.c
@@ -50,108 +50,13 @@
 	return(0);
 }
 
-static __inline__ int write_sector_39sf020(volatile char * bios, 
-					   unsigned char * src,
-					   volatile unsigned char * dst, 
-					   unsigned int page_size)
-{
-	int i;
-	volatile char *Temp;
-
-	for (i = 0; i < page_size; i++) {
-		if (*dst != 0xff) {
-			printf("FATAL: dst %p not erased (val 0x%x\n", dst, *dst);
-			return(-1);
-		}
-		/* transfer data from source to destination */
-		if (*src == 0xFF) {
-			dst++, src++;
-			/* If the data is 0xFF, don't program it */
-			continue;
-		}
-		Temp =   (bios + 0x5555); 
-		*Temp = 0xAA;                   
-		Temp =  bios + 0x2AAA; 
-		*Temp = 0x55; 
-		Temp =  bios + 0x5555; 
-		*Temp = 0xA0;                   
-		*dst = *src;
-		toggle_ready_jedec(bios);
-		if (*dst != *src)
-			printf("BAD! dst 0x%lx val 0x%x src 0x%x\n",
-			       (unsigned long)dst, *dst, *src);
-		dst++, src++;
-	}
-
-	return(0);
-}
-
-int probe_39sf020 (struct flashchip * flash)
-{
-        volatile char * bios = flash->virt_addr;
-        unsigned char  id1, id2;
-
-        *(volatile char *) (bios + 0x5555) = 0xAA;
-        myusec_delay(10);
-        *(volatile char *) (bios + 0x2AAA) = 0x55;
-        myusec_delay(10);
-        *(volatile char *) (bios + 0x5555) = 0x90;
-
-        myusec_delay(10);
-
-        id1 = *(volatile unsigned char *) bios;
-        id2 = *(volatile unsigned char *) (bios + 0x01);
-
-        *(volatile char *) (bios + 0x5555) = 0xAA;
-        *(volatile char *) (bios + 0x2AAA) = 0x55;
-        *(volatile char *) (bios + 0x5555) = 0xF0;
-
-        myusec_delay(10);
-
-	printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
-
-        if (id1 == flash->manufacture_id && id2 == flash->model_id)
-                return 1;
-
-        return 0;
-}
-
-int erase_39sf020 (struct flashchip * flash)
-{
-	volatile unsigned char * bios = flash->virt_addr;
-	volatile unsigned char *Temp;
-
-        /*  Issue the Sector Erase command to 39SF020   */
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0xAA;            /* write data 0xAA to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x2AAA; /* set up address to be C000:2AAAh      */
-        *Temp = 0x55;         /* write data 0x55 to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0x80;            /* write data 0x80 to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0xAA;         /* write data 0xAA to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x2AAA; /* set up address to be C000:2AAAh      */
-        *Temp = 0x55;          /* write data 0x55 to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0x10;       /* write data 0x55 to the address       */
-
-	myusec_delay(50000);
-
-	return(0);
-}
-
 int write_39sf020 (struct flashchip * flash, unsigned char * buf)
 {
 	int i;
 	int total_size = flash->total_size * 1024, page_size = flash->page_size;
 	volatile char * bios = flash->virt_addr;
 
-	erase_39sf020(flash);
+	erase_jedec(flash);
 
 	printf ("Programming Page: ");
 	for (i = 0; i < total_size/page_size; i++) {
@@ -160,7 +65,7 @@
 
 		/* write to the sector */
 		printf ("%04d at address: 0x%08x", i, i * page_size);
-		write_sector_39sf020(bios, buf + i * page_size, bios + i * page_size,
+		write_sector_jedec(bios, buf + i * page_size, bios + i * page_size,
 				     page_size);
 		printf ("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
                 fflush(stdout);
diff --git a/sst39sf020.h b/sst39sf020.h
index dfbedff..9cb7be0 100644
--- a/sst39sf020.h
+++ b/sst39sf020.h
@@ -2,7 +2,6 @@
 #define __SST39SF020_H__ 1
 
 extern int probe_39sf020 (struct flashchip * flash);
-extern int erase_39sf020 (struct flashchip * flash);
 extern int write_39sf020 (struct flashchip * flash, unsigned char * buf);
 
 #endif /* !__SST39SF020_H__ */
diff --git a/sst49lf040.c b/sst49lf040.c
index 48ef440..03e0f5a 100644
--- a/sst49lf040.c
+++ b/sst49lf040.c
@@ -37,131 +37,6 @@
 #define RESET			0xFF
 #define READ_ID			0x90
 
-static int erase_sector_49lf040 (volatile char * bios, unsigned int page)
-{
-	/* Chip erase function does not exist for LPC mode on 49lf040.
-	 * Erase sector-by-sector instead. */
-	volatile unsigned char *Temp;
-
-        /*  Issue the Sector Erase command to 40LF040   */
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0xAA;            /* write data 0xAA to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x2AAA; /* set up address to be C000:2AAAh      */
-        *Temp = 0x55;         /* write data 0x55 to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0x80;            /* write data 0x80 to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0xAA;         /* write data 0xAA to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x2AAA; /* set up address to be C000:2AAAh      */
-        *Temp = 0x55;          /* write data 0x55 to the address       */
-	myusec_delay(10);
-        Temp  = bios + page; /* set up address to be the current sector */
-        *Temp = 0x30;       /* write data 0x30 to the address       */
-	
-	/* wait for Toggle bit ready         */
-	toggle_ready_jedec(bios);
-
-	return(0);
-}
-
-static __inline__ int write_sector_49lf040(volatile char * bios, 
-					   unsigned char * src,
-					   volatile unsigned char * dst, 
-					   unsigned int page_size)
-{
-	int i;
-	volatile char *Temp;
-
-	for (i = 0; i < page_size; i++) {
-		if (*dst != 0xff) {
-			printf("FATAL: dst %p not erased (val 0x%x)\n", dst, *dst);
-			return(-1);
-		}
-		/* transfer data from source to destination */
-		if (*src == 0xFF) {
-			dst++, src++;
-			/* If the data is 0xFF, don't program it */
-			continue;
-		}
-		Temp =   (bios + 0x5555); 
-		*Temp = 0xAA;                   
-		Temp =  bios + 0x2AAA; 
-		*Temp = 0x55; 
-		Temp =  bios + 0x5555; 
-		*Temp = 0xA0;                   
-		*dst = *src;
-		toggle_ready_jedec(bios);
-		if (*dst != *src)
-			printf("BAD! dst 0x%lx val 0x%x src 0x%x\n",
-			       (unsigned long)dst, *dst, *src);
-		dst++, src++;
-	}
-
-	return(0);
-}
-
-int probe_49lf040 (struct flashchip * flash)
-{
-        volatile char * bios = flash->virt_addr;
-        unsigned char  id1, id2;
-
-        *(volatile char *) (bios + 0x5555) = 0xAA;
-        myusec_delay(10);
-        *(volatile char *) (bios + 0x2AAA) = 0x55;
-        myusec_delay(10);
-        *(volatile char *) (bios + 0x5555) = 0x90;
-        myusec_delay(10);
-
-        id1 = *(volatile unsigned char *) bios;
-        id2 = *(volatile unsigned char *) (bios + 0x01);
-
-        *(volatile char *) (bios + 0x5555) = 0xAA;
-        *(volatile char *) (bios + 0x2AAA) = 0x55;
-        *(volatile char *) (bios + 0x5555) = 0xF0;
-
-        myusec_delay(10);
-
-	printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
-
-        if (id1 == flash->manufacture_id && id2 == flash->model_id)
-                return 1;
-
-        return 0;
-}
-
-/* Chip erase only works in parallel programming mode for the 49lf040.
- * Use sector-erase instead */
-int erase_49lf040 (struct flashchip * flash)
-{
-	volatile unsigned char * bios = flash->virt_addr;
-	volatile unsigned char *Temp;
-
-        /*  Issue the Sector Erase command to 40LF040   */
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0xAA;            /* write data 0xAA to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x2AAA; /* set up address to be C000:2AAAh      */
-        *Temp = 0x55;         /* write data 0x55 to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0x80;            /* write data 0x80 to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0xAA;         /* write data 0xAA to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x2AAA; /* set up address to be C000:2AAAh      */
-        *Temp = 0x55;          /* write data 0x55 to the address       */
-	myusec_delay(10);
-        Temp  = bios + 0x5555; /* set up address to be C000:5555h      */
-        *Temp = 0x10;       /* write data 0x55 to the address       */
-	myusec_delay(50000);
-
-	return(0);
-}
 
 int write_49lf040 (struct flashchip * flash, unsigned char * buf)
 {
@@ -171,13 +46,15 @@
 
 	printf ("Programming Page: ");
 	for (i = 0; i < total_size/page_size; i++) {
-		/* erase the page before programming */
-		erase_sector_49lf040(bios, i * page_size);
+		/* erase the page before programming
+		 * Chip erase only works in parallel programming mode for the 49lf040.
+		 * Use sector-erase instead */
+		erase_sector_jedec(bios, i * page_size);
 
 		/* write to the sector */
 		printf ("%04d at address: 0x%08x ", i, i * page_size);
-		write_sector_49lf040(bios, buf + i * page_size, bios + i * page_size,
-				     page_size);
+		write_sector_jedec(bios, buf + i * page_size, bios + i * page_size,
+				   page_size);
 		printf ("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
                 fflush(stdout);
 	}
diff --git a/w49f002u.c b/w49f002u.c
index 28a94ab..3fb14d4 100644
--- a/w49f002u.c
+++ b/w49f002u.c
@@ -32,49 +32,6 @@
 #include "jedec.h"
 #include "w49f002u.h"
 
-int probe_49f002 (struct flashchip * flash)
-{
-	volatile char * bios = flash->virt_addr;
-	unsigned char id1, id2;
-
-	*(volatile char *) (bios + 0x5555) = 0xAA;
-	*(volatile char *) (bios + 0x2AAA) = 0x55;
-	*(volatile char *) (bios + 0x5555) = 0x90;
-    
-	id1 = *(volatile unsigned char *) bios;
-	id2 = *(volatile unsigned char *) (bios + 0x01);
-
-	*(volatile char *) (bios + 0x5555) = 0xAA;
-        *(volatile char *) (bios + 0x2AAA) = 0x55;
-	*(volatile char *) (bios + 0x5555) = 0xF0;
-
-	myusec_delay(10);
-
-	printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);	
-
-	if (id1 == flash->manufacture_id && id2 == flash->model_id)
-		return 1;
-
-	return 0;
-}
-
-int erase_49f002 (struct flashchip * flash)
-{
-	volatile char * bios = flash->virt_addr;
-
-	*(bios + 0x5555) = 0xAA;
-	*(bios + 0x2AAA) = 0x55;
-	*(bios + 0x5555) = 0x80;
-	*(bios + 0x5555) = 0xAA;
-	*(bios + 0x2AAA) = 0x55;
-	*(bios + 0x5555) = 0x10;
-
-	myusec_delay(100);
-	toggle_ready_jedec(bios);
-
-	return(0);
-}
-
 int write_49f002 (struct flashchip * flash, unsigned char * buf)
 {
 	int i;
@@ -82,7 +39,7 @@
 	volatile char * bios = flash->virt_addr;
 	volatile char * dst = bios;
 
-	erase_49f002(flash);
+	erase_jedec(flash);
 
 	printf ("Programming Page: ");
 	for (i = 0; i < total_size; i++) {