diff --git a/mx29f002.c b/mx29f002.c
index 30adab1..0e3f562 100644
--- a/mx29f002.c
+++ b/mx29f002.c
@@ -27,14 +27,14 @@
 	volatile uint8_t *bios = flash->virtual_memory;
 	uint8_t id1, id2;
 
-	*(bios + 0x5555) = 0xAA;
-	*(bios + 0x2AAA) = 0x55;
-	*(bios + 0x5555) = 0x90;
+	writeb(0xAA, bios + 0x5555);
+	writeb(0x55, bios + 0x2AAA);
+	writeb(0x90, bios + 0x5555);
 
-	id1 = *(volatile uint8_t *)bios;
-	id2 = *(volatile uint8_t *)(bios + 0x01);
+	id1 = readb(bios);
+	id2 = readb(bios + 0x01);
 
-	*bios = 0xF0;
+	writeb(0xF0, bios);
 
 	myusec_delay(10);
 
@@ -49,13 +49,13 @@
 {
 	volatile uint8_t *bios = flash->virtual_memory;
 
-	*(bios + 0x555) = 0xF0;
-	*(bios + 0x555) = 0xAA;
-	*(bios + 0x2AA) = 0x55;
-	*(bios + 0x555) = 0x80;
-	*(bios + 0x555) = 0xAA;
-	*(bios + 0x2AA) = 0x55;
-	*(bios + 0x555) = 0x10;
+	writeb(0xF0, bios + 0x555);
+	writeb(0xAA, bios + 0x555);
+	writeb(0x55, bios + 0x2AA);
+	writeb(0x80, bios + 0x555);
+	writeb(0xAA, bios + 0x555);
+	writeb(0x55, bios + 0x2AA);
+	writeb(0x10, bios + 0x555);
 
 	myusec_delay(100);
 	toggle_ready_jedec(bios);
@@ -65,12 +65,12 @@
 
 #if 0
 	toggle_ready_jedec(bios);
-	*(bios + 0x0ffff) = 0x30;
-	*(bios + 0x1ffff) = 0x30;
-	*(bios + 0x2ffff) = 0x30;
-	*(bios + 0x37fff) = 0x30;
-	*(bios + 0x39fff) = 0x30;
-	*(bios + 0x3bfff) = 0x30;
+	writeb(0x30, bios + 0x0ffff);
+	writeb(0x30, bios + 0x1ffff);
+	writeb(0x30, bios + 0x2ffff);
+	writeb(0x30, bios + 0x37fff);
+	writeb(0x30, bios + 0x39fff);
+	writeb(0x30, bios + 0x3bfff);
 #endif
 
 	return 0;
@@ -83,7 +83,7 @@
 	volatile uint8_t *bios = flash->virtual_memory;
 	volatile uint8_t *dst = bios;
 
-	*bios = 0xF0;
+	writeb(0xF0, bios);
 	myusec_delay(10);
 	erase_29f002(flash);
 	//*bios = 0xF0;
@@ -93,10 +93,10 @@
 		/* write to the sector */
 		if ((i & 0xfff) == 0)
 			printf("address: 0x%08lx", (unsigned long)i);
-		*(bios + 0x5555) = 0xAA;
-		*(bios + 0x2AAA) = 0x55;
-		*(bios + 0x5555) = 0xA0;
-		*dst++ = *buf++;
+		writeb(0xAA, bios + 0x5555);
+		writeb(0x55, bios + 0x2AAA);
+		writeb(0xA0, bios + 0x5555);
+		writeb(*buf++, dst++);
 
 		/* wait for Toggle bit ready */
 		toggle_ready_jedec(dst);