On Mon, 29 Dec 1997 22:56:40 CET Marc Heuler writes: >Hi Mike (Mike Keitz), in <19971229.161018.6742.13.mkeitz@juno.com> on >Dec 29 you > wrote: >> execute any HEX file written for C84 directly on a F84 without >> modification. > >You can't, if the HEX file includes the fuse bit config. This is true. What I meant to say is that the program code, special function registers, and data EEPROM. are exactly compatible. If the hex file has incorrect (non-applicable) configuration settings, the programmer should allow you to override them. So check and adjust the settings before programming the chip. If the programmer insists on using settings from the file, you can delete them. Open the HEX file with a text editor and look for a line of the form :02400E00XXXXXX where X is any hex digit (the first 4 are the configuration word, and the last 2 are a checksum for the line). Delete this line, and set the fuses manually in the programmer's user interface.