On 12/24/2016 12:00 PM, Noel Chiappa wrote: I was looking at some photos on FB posted by a friend and ran across Richard Greenblatt's oral history. It has some mentions of what the PDP6's and PDP 10's were used for. http://archive.computerhistory.org/projects/chess/related_materials/oral-hi… I've not had time to read other than to think these are perhaps interesting if you guys didn't run across them. I think they may have been used by the Project Mac folks. Perhaps posting this over on the Multics thread might stir up some information if you want more. A lot of the original guys are there. I'd be glad to do it if no-one else on the thread here can do so. Thanks for the interesting thread. thanks Jim And Merry Christmas from LA

The report mentions rearranging the core boxes (to be able to interleave the two pairs of faster memories) in January 1970. The conference date is March 1970, and it says they were "presently" upgrading to a PDP-10, so maybe there were three on campus for a brief time! The table "Figure 4" is interesting: It shows they were able to do scans 75.5%, 72.2% and 82.3% of the time in three months. More time was lost due to Film Change, PEPR (Film scanner) trouble, Magnetic Tape unit trouble (in increasing order) than due to the PDP-6 CPU; They must have gotten a GOOD one!! I've converted my notes at http://www.ultimate.com/phil/pdp10/pdp6-serials.html to HTML, and added some (but not all new info) from the current discussion. The invoice dates come from a document about core memory royalties but I didn't note a URL....