From mboxrd@z Thu Jan 1 00:00:00 1970 From: wkb@xs4all.nl (Wilko Bulte) Date: Thu, 18 Nov 2010 22:03:53 +0100 Subject: [TUHS] pdp11 question In-Reply-To: References: <1290106759.945.for-standards-violators@oclsc.org> Message-ID: <20101118210353.GB2115@freebie.xs4all.nl> Quoting Carl Lowenstein, who wrote on Thu, Nov 18, 2010 at 11:27:31AM -0800 .. > On Thu, Nov 18, 2010 at 10:57 AM, Norman Wilson wrote: > > Just to loop things around a bit: > > > > Some of the larger VAXes used small PDP-11s (and their > > bastard offspring) as console processors. > > > > This started with the very first VAX, the 11/780, which > > used an 11/23 as a console.  The console ran a stripped-down > > system, possibly based on RT-11 or RSX-11, I forget (and > > am typing this on a train in the Outer Mongolia part of > > Texas where it's hard to look up references). > > RT-11. Original LSI-11 (quad card) or perhaps 11/2 (dual card). The > processor card that was used in a system called 11/03. I have an 11/2 card :) It used to control the concrete mixing silos at the company my father used to work for. Came with 2x RX02. I encountered RX02 disks I could not rotate in their sleeve anymore. Too much sand and grit :) Just cleaned the heads and vacumed out all the cement. Worked just fine ever after (in fact, it also worked fine with the cement & grit & whatever :) Wilko