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This image is a treasure trove.
The poster on wall on left is for a PDP-11/23, which was one of "a series of 16-bit minicomputers sold by Digital Equipment Corporation (DEC) from 1970 into the 1990s". en.wikipedia.org/wiki/PDP-11. Specifically, it is the PDP-11/23, "a second generation of LSI (F-11). Early units supported only 248 kB of memory."
The four fanned pennants behind the seated guy's head seems to be a motivational giveaway for a Digital Equipment Corporation conference held on August 15, 1979. I can't find any info on this.
The item on the far right is a "coming soon" poster for "A New Standard of Excellence in 16-Bit Minicomputer Architecture"-- the PDP 11/44. From Wikipedia:
"PDP-11/44 — Replacement for the 11/45 and 11/70 that supported optional cache memory and floating-point processor, and included a sophisticated serial console interface and support for 4 MB of physical memory. The design team was managed by John Sofio. This was the last PDP-11 processor to be constructed using discrete logic gates; later models were all microprogrammed."
Lastly, the book underneath the plans they're reviewing is "The Silva Mind Control Method"
The DEC PDP-11/23 has the following cards: DEC M8186, National Semiconductor Memory Systems 551103882-003 Rev C, DSD A2132-4, Sigma 400x00 (4th digit obscured by overprinting on the board), and an Emulex SU0210401 Rev G
The PDP-11/05 [SOLD] has: DEC M7280, M7281, M7847 and a small [double height?] card packed with a bunch of resistors and not much else (help here?).
Me in October 1991. Am about to boot a Digital PDP 11/23+, an old mini computer. Was great fun to play around with.
Capture from an VHS-film.
BA23 back plane of a Digital PDP 11/23 that I had kicking around the garage for a few years but has now since been given away. This has a massive 64K RAM, six serial ports and two RL02 10MB Disks.
Booting our Digital PDP-11/23 after the restoration - @verdebinario #dec #digital #pdp11 #pdp1123 #retrocomputing #retrocomputers #restoration #computerhistory #computer #circuit #maker #laboratory #programmable #tech #tecnology #projects #vintagecomputer #broadcasting #oldhardware #instatech #electronicscomponents ift.tt/2tBqc9b