Good afternoon, We have got the following problem. We have the keil monitor mon51 at 0000h. We have a C program at 8100h. We are able to start our program (after beeing loaded ) thanks to dscope debuger. However we are unable to boot on our program at startup. It is quite anoying since the 80c552 we are using, is embedded on a robot. We just would like to know how to make our program bootable at startup. Our keil version is like this: uVision 2 V2.14 C compiler V6.14 Assembler V6.14 Linker V4.14 Thanks for your answers.