I've figured out most of what you need to know to get an M7554 board working as a PDP-11/53 CPU, including the console pinout, most of the jumpers, and how to burn ROMs for the M7554-SD. It's all written down here: http://users.safeaccess.com/engdahl/KDJ11.htm -- Jonathan Engdahl Rockwell Automation Principal Research Engineer 24800 Tungsten Road Advanced Technology Euclid, OH 44117 USA Euclid Labs http://users.safeaccess.com/engdahl