I would like to fix an address to start my code always at the same address. I have all books C51, A51, BL51, etc but I've lost my L51 book... I use in the option file of linker the instruction CODE(4000H). It works but it's not enough: I want to specify the address (for example 4100H) of the main() function. I supposed we need to specify the order of files linked and the address of my first file to link... but I don't know how?! Please, could you help me?