On Tue, Jul 28, 2009 at 7:15 AM, William Maddox<wmaddox at pacbell.net> wrote: BOOT and the more suggestive "Line Clock". I have some Qbus Andromeda cards, but I didn't know they ever made whole systems. The blue PCB that's behind the DB25s in one of the shots is the color of the Andromeda boards I have. In the early LSI-11 days, DEC had the DLV11J, but no backpanel (you used individual cables) yet. The board that's on the other end of those DB25s is likely to be an Andromeda DLV11J clone (I have one in the basement). My first guess for the 40-pin Berg on the backpanel would be an LPV11 or Andromeda equivalent. It's a shame the seller didn't send pictures of the boards - there's almost certainly a Qbus backplane under there, but no way of knowing how it's populated. It could be anything from an LSI-11 processor (PDP-11/03 and similar) to a KDF11 (PDP-11/23 and similar) to empty. There's no way to guess the memory except to say that it's not going to be core; the most common memories from that era were based on 4K or 16K DRAMs (but there are a few exceptions). That looks like a cute little box. If I had it, I'd probable run RT-11 on it since it probably has very little room for peripheral expansion (though an RLV12 would be nice and simple to install and cable, if there happens to be a free quad slot on the backplane; and for OSes with MSCP support, there's always SCSI if you have a card already or can afford one). -ethan