Myke Predko wrote: > Does anybody have any more information on this register and how to access it > in a general case? Hi Myke, They are the registers not implemented on a PIC. For example, registers 0x30-0x7F on the bank 0 of a 16C84. They are accessed normally like any registers in the bank except they return 0 when read. regards, Reggie -- e-mail: rberdin@bigfoot.com ICQ#: 31651436 URL: http://www.bigfoot.com/~rberdin