DEC 11/70...

Hello all... A couple of weeks ago, I put out an e-mail to the List that mentioned that a friend had given a DEC PDP-11/70 (or so he thought) to me that had been 'hardened' by Schlumberger for use in the oil patch. The machine supposedly works and weighs close to 200 lbs. The oldest board claims, I think, to have been built in late 1978. I know practically nothing about the PDP series and so don't have the foggiest as to what I really have. Finally, over the weekend, I was able to open the box (1/4" armored steel ugly thing) and take a look at the boards -- there are a total of ten as follows: (Keep in mind that I don't know what typical DEC parts numbers look like -- I think that a lot of the numbers that I wrote down are actually production lots etc): (1): Obviously a CPU board -- AH13Z-06. Also claims DEC P/N 1216988. Has a 15MHz crystal and is 15.5x8" in size. It has edge connectors (as do all of the boards). (2): 'Bootstrap Terminator' - DEC-81. 5013263C-P2. 8x5". (3): 'Flip Chip" 5008691 PCC-1Vo. 2.5x2". This is some sort of jumper board. (4): 4MB(?) DRAM. DEC P/N 1216988 (notice that this is the same p/n as the CPU board -- that is, I suppose?, the system part number), A88D30824 RA1-RA3: RM8-3.3Kx3 (probably a component label for a resistor pack but not sure); C:TD104/5DX92 AH12Z-12. 15.5x8". (5-9): H-236341 EXT BRD 10.5x8". These appear to be extendor boards that bring +15VDC and a few timing signals out to the edge of the cage -- why there are five, I cannot imagine... (10): "FLIP CHIP". FEB 78 SCO/R1L OPTION M7856 H236602 -01048. 10.5x8" This appears(?) to be possibly an I/O controller board of some sort... Does anyone have any idea of what these things came out of? They are free to a good home -- preferably someone that can actually use them and put them back to work (can you imagine how boring it would be to madly process seismographic data for 20-years -- I bet they would like to try something different for a change) (postage + packing costs). Regards Jack Harper (Friend to all things Symbolics) --------------------------------------------------------------------- Jack Harper Bank Systems 2000, Inc. 303-277-1892 Golden, Colorado USA "21st Century Financial Applications" Optical Cards for Bank, EBT, and Medical Applications Visit our Web Page: http://www.bs2000.com/talos (Last Update: 970902) ---------------------------------------------------------------------