Sure, get a MJ11 memory box (or, rather, 4 times as many MJ11's as you had MK11's) :-). There are several other third-party memory boxes/cards available too. I do believe that there's an option to map some of the memory space on the Unibus into memory space. It probably doesn't work correctly at all if you're using the Massbus slots for I/O, though, and you certainly can't get above 124 kWords doing this. Out of curiosity, why can't you use your MK11's? Not enough power to run them and the 11/70 at the same time? I had to take multiple 15A circuits to run my 11/70 with MJ11 memory boxes. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927