Hello! I can send you a part od my program, that converts hex to bcd and displays it. It is complete library with lcd (hd44780) driving functions. My system works with lcd as external memory. I am not quite sure, that it will be usefull for you, but you can use hex-to-bcd converting functions. The functions I wrote for 3 byte (up to 167772215 dec). Greetings, Jacek
PS
It is Assembler language!