This from Billy Petit: ------- Forwarded message follows ------- Unless I have badly confused names, the GRID system was a very unusual Control Data experiement. It was a 160-A made from CDC's Interbrid logic chips. It used a 12 bit X and Y axis vector display. The instruction set was the standard 160-A but with some extra commands supporting the display. It was initialized with Function Ready commands, then did vector transfers directly from the processor memory. The memory was 12K core of 12 bits. This was a very small run system, somewhere around 20 to 30 systems total built. They were made at the Roseville plant. The GRIDsystemwas droppeda little afterCDC bought out the imaging group from Itek and formed the Digigraphics Division. (The market wasn't big enough to support two competing product lines.) The 274 console was the second generation system from this new group. The first was a huge console used on 3000 systems. It was used on large CAD systems. They were made at the Burlington, Mass. plant. I installed four of them at Lockheed in Marietta when they won the C-5 contract, circa 1966-67. Maybe another 10 systems total, were made. The second generation Digigraphics system used a new controller built 1700 systems. There was a limited version that shipped with the System 18. I'd love to see the GRID manual posted to bitsavers. If you will loan it to Al or me, we will scan it and return to you. I may still have some schemantics for it in the garage, but I haven't seen them since 1976 so I maybe imagining their existence. I have recently talked to one of the designers of the GRID, but my contact addresses for him don't work. I still can't post emails directly to the cclist, so can I get one of you to put up this follow up message? Thanks, Billy