Ted, I like the compromise you suggested of reserving values 64-255 for future use. I think we should change the documents to reflect this. Thanks, --Naganand ----------------------------------------------------------------- Naganand Doraswamy (978)916-1323 (O) Bay Architecture Lab (978)916-0620 (Fax) 3 Federal St, Mail Stop BL3-03 Billerica, MA 01821