I don't speek much English, so i'm going to try to explain my problem... In the 8952 I load a program (Named Bootstrap Loader for Hexadecimal Files. Written by G. Goodhue, Philips Electronics). Then, I conect a RAM to the 8952 and, somehow, I have to send a Hexadecimal files (a program) a the Bootstrap loader will load it in the RAM. This program will be run from the RAM. I tray to send the HEX file using the Hyperterminal, but I couldn't... I'm now using the MAX232... I hope that you could understand me... Thanks...