Jon, I tried that example you gave me, and it didn't seem to work. I think there may be problems with the development kit. David
Also under the target section i cannot set xdata from 4000-FFFF it complains about it being out of bounds. If i use the BL51 tab i can but there are no options for code banking etc. Note that the second parameter is SIZE and not ENDING address. The size of the XDATA range (from 4000-FFFF) would be 0xC000. Jon