> > can you use it upside down? > > Richard P > > > We have this interesting problem of a prom that went obsolete, found a > > similar device, in size and speed, but the pinout is reversed from the > > original. its 256K 8bit wide device, plcc package. Anyone > > ever heard of a > > company that makes a pin swapping socket? > > The 68HC11 programmer we used to use (supplied by Motorola) programmed the PLCC chip upside down. (remembers back to dark days pre-pic). _____________________________ Lance Allen Technical Officer Uni of Auckland Psych Dept New Zealand _____________________________