After the RAM-Tests are done now I want to check the ROM :) After converting the HEX-File "project.h86" to a BIN-File I have calculated and appended a CRC-Checksum to it and re-converted the BIN-File into the Intel-Hex-Format and downloaded this File into the Flash-ROM. And now my question is: Is there an easy way to get the USED Flash-Size and so to locate the stored CRC-Checksum (in Keil uVision2, Assembler or C)? I don't want to store the checksum at a fixed position as it is possible in here: http://www.keil.com/support/docs/494.htm . It should be located at the end of the used Flash-ROM. Thanks Torsten