Hello, With the wonderful help of many you here I have revived a PDP11/04, connected it to an RL02, and using PDP11GUI I have successfully imaged a number of RL02 packs.? I found a copy of an RQ device that boots.? I can attach my images and explore the contents with PIP so I believe the transfer was good. One of the packs was a system disk so I tried to boot it like this: ?? PDP-11 simulator V3.8-2 (JH stdio telnet) ?? sim> set cpu 11/93, 4M ?? Disabling CR ?? Disabling RK ?? Disabling HK ?? Disabling TM ?? sim> set cpu idle ?? sim> set rl0 rl02 ?? sim> attach rl0 RSX11-bu.rl02 ?? sim> b rl0 ?? SAV -- SOFTWARE CONFIGURED FOR ENABLE HARDWARE WHICH DOES NOT RESPOND.? HALTED. ?? HALT instruction, PC: 126272 (BR 126270) ?? sim> Does anyone have any hints on how I can guess what I need to add? The original machine was and 11/34 (maybe a 11/34a) and had a multi-line serial port setup.? All thoughts appreciated. Sincerely, John Welch :qw