I have bodged an Exar UART onto a DSTINIs400 board & need to use INT0 with it. As a starting point pressing a push button to create an INT to test a handler gets executed would be nice before getting into writing various UART routines. When I compile my C code, I get the warning L30: memory space overlap from c:200003H to c:200007H I'm not sure why this has happened & how do I get it working?? I am using the mon390 code to debug. Help! Thanks Trevor