All, Another thing that surfaced recently on my pile is a manila envelope containing a big photocopied stack of papers, with a title page saying: ? Interfacing the Commodore PET by Bill Durham, David Paul, and jim Wilman University of Arkansas. ? It?s got about 45 pages of text, interspersed with block diagrams showing chip in/out signals and snippets of BASIC code, then a repeat of all that, then a copy of the 6502 instruction set and copies of multiple data sheets for various integrated circuits. Thought I identified an interested party on the list, but no response to PM, so offering it to all. Free to a Good Home, usual terms, first response unless I hear from Al K. before I ship in which case he gets it instead. - Mark 210-522-6025 office 210-379-4635 cell