hello everyone!

i'm woking on a development system with the ADµC812 (8052 core) as a school project. i need a subroutine, that is able to read an intel hex file over the com-port after a defined start condition (sending " " = space from the pc to the ADuC812). it should check vor invalid data & save the program data into a ram at adress 8000h. the program is therafter executed from this adress in ram. adress decoding is working, but the code... :o( could anybody help me?????