Hi, I work on ST10F168 with Keil V2.38 I have a standart program in flash and i want to load via SCIO a program in external RAM in order to execute it. What the good format can i load in RAM : h86 or lib My problem is to decode a *.h86 in hexadecimal to write it in RAM in disassembly in order to execute it. If you know the best format to do it, and the procedure to create it. A lot of suggestions are happened! Thanks Regards