I my using st10f269 in my application following files are present. 1)Startup.a66 2)file1.c 3)file2.c 4)file3.c file 1 calls file 2 and file 3. i want to link startup.a66 and file1 to 0x0000 - 0x3FFF i want to link file2 and file 3 0x4000 onwords. Please help. regards... Yogesh Gudekar