Well, I've run into an interesting problem with my PDP11/73. One of the boot ROMs (the low byte) has gone phut - just reads back 0377 at all addresses. I've proved it's the ROM that's at fault. Is there a particular "favourite" boot ROM for the PDP11? I'm not sure quite what mine was - it is used with a Baydel multifunction card (LTC, console SLU and boot) and displayed a "COLLEGE OF AGRICULTURE" logo (the machine originally came from Aberdeen College of Agriculture), and had the option to boot a few different devices, including RL02, RX02 and MSCP. I can get it to boot by typing in a loader in octal, after hitting BREAK. Gordon.