Talk:Tech Square

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9th floor map

Noel, we're interested in hearing your comments about the floor plan. Larsbrinkhoff (talk) And you already gave some, thanks!

I wasn't there during the CTSS/Multics era, but later on there was still a huge I-beam running along the floor where '1401/DM PDP-6' is on this map, and I was told that that had been installed to hold the Multics (or CTSS, I forget which) tape drives (or maybe drum). So it may have been all through that end. It shouldn't be hard to find out.
Also, LISP machines were scattered all over the floor; the prototype CADR, along with the CONS machine and the chess machine (CHEOPS) was in one of 904-906 (I forget which); others were down near AI. Jnc (talk) 22:01, 25 January 2018 (CET)

Where did the four KS10 machines go? Larsbrinkhoff (talk)

Where the ML KA used to be.
Speaking of the KS10's, I wish I could find a copy of the letter I wrote for Dave Clark to sign, asking for the donation from DEC. I looked on the MIT-CSR machine (whose filesystem I recently recovered), but alas, not there. It must have been on one of the other machines (XX, or one of the ITS's). Jnc (talk) 15:11, 26 January 2018 (CET)
I see various references in mailing list archives, but not specifially that letter. I believe there were two rounds of deliveries? First one KS10 replacement for AI in 1984, and then three more in 1985; does that seem right? Larsbrinkhoff (talk)
JNC Aug 1985. "I have organised a campaign to get DEC to give MIT several more of the little critters. A letter was written asking for a donation of several of the machines to MIT (i.e. both LCS and AI); due to the time pressures involved (all of the remaining unsold KS's were about to be scrapped) I couldn't get a lot of big wheels to sign, but Dave Clark did agree to sign the letter and lend his name to the campaign."
JTW May 1984: "It would appear that I am the slightly surprised recipient of one KS10-AA PDP10 CPU, with 512K MOS memory, 32 TTY lines, and a small DEC disk of some flavor. This object will be arriving in late May or early June."
Yeah, I think that's right. I had thought all 4 arrived together, but clearly they didn't. The 3 makes sense also because I had wanted to call them Huey, Duey and Looey (after the droids in Silent Running, which I quite liked). Jnc (talk) 16:07, 26 January 2018 (CET)

When the KA10 AI was removed: "The place where AI used to be is now filled with Vaxen and 3600s." Larsbrinkhoff (talk)

Well, I'm pretty sure OZ was along the outer wall there, in the space between 923 (which stayed for a long time, although maybe eventually it was diked - my memory is dim on that) and the corner of the building. Although the AI -6 was not along the wall, but further out, with the AI KA between it and the wall. Jnc (talk) 16:03, 26 January 2018 (CET)

Speaking of VAXen, around the time the MC KL went, LCS got a farm of VAX-11/750's, which lived either in that area, and around the corner a bit (to where the DM -6 and KA used to be); again, I don't recall the exact layout, alas. But it was in that general area. Jnc (talk) 16:03, 26 January 2018 (CET)