More photos from VCF East 8

On Tue, May 8, 2012 at 11:27 PM, B Degnan <billdeg at degnanco.com> wrote: You wrote: "Mike Ross' exhibit consisted of a PDP 11/05 used to interface with a PDP 15, in two racks. He demonstrated restoration techniques for attendees. I am not sure exactly what you call this console, there is no "PDP 15" on the panel, but I assume it's some kind of I/O device that complements the (not pictured) PDP 11/05 used to presumably bootstrap this thing." That _is_ the PDP-15 front panel - if you look, there are 18 data bits. The PDP-15 CPU was the large spread of M-series cards on the backplane above this front panel. Its memory was in a black box below (and not there for much of the weekend). The PDP-11/05 is self-contained and does the same job as the PDP-11/03 in a VAX-11/780 or the PDP-11 in various models of PDP-10. In each case, the PDP-11 boots from its own ROMs to start up enough code to feed the larger processor. In the case of the VAX-11/780, the PDP-11/03 has one RX01 floppy drive. I don't know what this PDP-11 uses, but there must be some local mass storage that's part of the scheme. Many I/O devices of the day did have blinkenlights indicators (usually installed at the top of the rack), but not this many control switches. -ethan