Hi, Attached you can find the patch to declare two new memory descriptors, used for setting up memory areas with MMU . This can be used in the variant HALs in cyg_hal_map_memory function. Regards, Edgar -- Edgar Grimberg System Developer Zylin AS ZY1000 JTAG Debugger http://www.zylin.com/zy1000.html Phone: (+47) 51 63 25 00