Hi Jim, That about the same as what I am doing now. My configuration is as below. There will be one host PIC, which is either F252/F452. Then there is a RS-232 interface to a PC through MAX232. Here is where the PIC will get the HEX data in Intel format. Then the host will decode the Intel format and put it to a 24xx512 series eeprom (i2c interface). I am still working on this and the codes are completed only half way. But I am having confidence that this one will work. Good luck. WH Tan -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body