RX02 / DSD440 problem

Tom Leffingwell wrote: Sounds much like some kind of "turnkey" system that automatically executes a ROM-based boot routine upon power-up. Depending on what ROM that is (there are several options), you may be able to change the unit number by moving some jumper or DIP switch on the CPU board (which module no, in terms of Mnnnn?) or a separate board (ISTR there is something like a bootstrap/terminator module)? - Maybe I can find out by the halt address (173326). Anyway, I'll go home now (currently sitting in my office) and try to find a procedure that will at least get you up and running again. Maybe life gets easier if we can identify the modules that take care of your boot. I think, however, RX02 bootstraps were pretty long to type in... Regards, Andreas -- Andreas Freiherr Vishay Semiconductor GmbH, Heilbronn, Germany http://www.vishay.com