On Fri, Feb 8, 2013 at 7:59 AM, Henk Gooijen <henk.gooijen at hotmail.com>wrote: Does the KE11-B fit into the processor slot used by the KE11-A? My PDP-11/40 has some indication that it had an EAE (sticker above the backplane has EAE in faded ink), but it has an EIS board. Are there any spare FIS options floating around? -chuck

On Fri, Feb 8, 2013 at 1:03 PM, Dave McGuire <mcguire at neurotica.com> wrote: You can put me on the list of interested parties. I am about to move my 11/20 from long-term storage to a place where I can work on it - it needs *lots* of restoration work since I recovered it from a dumpster, literally, and one of my goals is to try to get v1 UNIX running on it (which requires a KE11). I'm not in a hurry - I still have to repair lots of things and I have to come up with a way to replace the RS11 swap disk that UNIX is expecting, but once I get the CPU restored and the external memory cabinets fixed up and powered (and a missing core plane replaced), I can turn to diagnosing and repairing my RK11C, *then* I'll be in a place to worry about a small, fast swap disk. -ethan

On Fri, 8 Feb 2013 13:15:50 -0500 Ethan Dicks wrote: I got v1 running on my 11/20 about a year and a half ago. I bolted a Nexys2 board onto a quad-height wire-wrap board with Unibus transceivers and a bunch of latches/buffers to handle the 5V/3.3V level shifting (as well as to mux the large number of Unibus signals to/from the Nexys2). The code in the Xilinx has 4MB of Unibus memory, RF11, RK11/RK05, KE11-A, KW11L, as well as other Unibus peripherals. The on-board flash contains the bootstraps, initial loads for various software images, and multiple RF11 and RK05 images. It ran on my real 11/20 and a real KL11, but all of the other peripherals were emulated on the board. I took some pictures of it running with an ASR 33 for the editors of an IEEE article, but the pictures probably weren't interesting enough and didn't make it into the article. One of these years, I'll get around to running using a real KE11-A, RK05, TU56, and PC05. I also have a 3rd party RF11-compatible disk, though running that is a long-shot, so the RF11 will probably remain the one emulated peripheral. On a side note ... the Xilinx also contains a full PDP-11 CPU, so the whole thing can even run standalone. One of the peripheral emulators in it is for the graphic processor used in the Galaxy Game. This got hooked up inside an original Galaxy Game cabinet with original joysticks for use at the California Extreme video game event last summer (the Galaxy Game cabinet with the original PDP-11/15 in it is running at the CHM). In fact, the original purpose of the Nexys2 code was to convert the vector graphics output from the Galaxy Game into a frame buffer to drive an SXGA compatible monitor. The scope of the code in the Xilinx kind of grew from there and I still end up adding things into it every six months or so. James Markevitch

No. THe EAE is a noraml Unibus device and can be used on any Unibus PDP11 The EIS oprion fo the 11/25 is a special add-on for that CPU (IIRC it adds more microcode, maybe some extra hardware too). They do not implement the same instruction set, the EIS board adds to the PDP11 machine instructions, the EAE is accessd via I/O ports. You can have both in the same machine if you want to.