diff --git a/firmware/export/s3c2440.h b/firmware/export/s3c2440.h
index b6ba79a34e..da2ea8937f 100644
--- a/firmware/export/s3c2440.h
+++ b/firmware/export/s3c2440.h
@@ -24,9 +24,11 @@
 #define LCD_BUFFER_SIZE (320*240*2)
 #define TTB_SIZE (0x4000)
 /* must be 16Kb (0x4000) aligned */
-#define TTB_BASE_ADDR (0x30000000 + (32*1024*1024) - TTB_SIZE)
+#define TTB_BASE_ADDR   (0x30000000 + (MEMORYSIZE*1024*1024) - TTB_SIZE)
+#define LCD_FRAME_ADDR  (TTB_BASE_ADDR - LCD_BUFFER_SIZE)
+
 #define TTB_BASE   ((unsigned long *)TTB_BASE_ADDR) /* End of memory */
-#define FRAME   ((unsigned short *)(TTB_BASE_ADDR - LCD_BUFFER_SIZE))  /* Right before TTB */
+#define FRAME           ((unsigned short *)LCD_FRAME_ADDR)  /* Right before TTB */
 
 /* Memory Controllers */