Malcolm, I am wondering about the address which made the M3 r/w access: 0x09FFEFFE Why they are using this one? It's the last address below the last 64 KByte of memory. Are the last 64 KByte special? A mirror of the GBA SRAM space? Any information? regards Amadeus -- We're back to the times when men were men and wrote their own device drivers. (Linus Torvalds)