#umdpdp12 — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #umdpdp12, aggregated by home.social.
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My student, Zach, got the famous Whetstone floating-point benchmark running in FORTRAN IV on our PDP-12 (results had never been recorded for a '12 without an FPP). He also implemented the Dhrystone integer benchmark in PDP-8 assembly, which (as far as we know) has never been done before. You can read more about it here, and if you have a PDP-8 compatible machine (with or without EAE), you should be able to run his code to benchmark your system! Way to go, Zach! https://forum.vcfed.org/index.php?threads/pdp-8-and-pdp-12-and-dhrystone-and-whetstone.1253367/ #pdp12 #pdp #retrocomputing #umdpdp12 #pdp8
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So my old friend @spacehobo wrote an implementation of Hellorld! for the PDP-12, and getting it to run was quite an adventure. How old of a friend? What's Hellorld!? How quite of an adventure was it it? Watch and learn -- you won't regret it.
(Nick also did a "takeover" of our channel and produced this video, so it is well above our standard sub-standard quality!)
#umdpdp12 #pdp12 #pdp #dec #retrocomputing #vintagecomputing #hellorld
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The #umdpdp12 is serial number 435. According to this 1978 document from #DEC, the total number of #pdp12 #minicomputers ever produced should be 765: https://archive.org/details/bitsavers_decBooksDE78_60225737/page/n93/mode/2up
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I wrote a short series of help commands in #PunyInform for an #InteractiveFiction project. I wrote a short `intro` verb, a longer `help` document with the most common verbs needed to win the game, and a `stuck` verb that tells the user not to panic before advising on strategies for solving the puzzles.
I then decided to remap the StrongSub verbs over to my new StuckSub, so that it can catch anyone swearing at the game in frustration.
And yes, I included the #umdpdp12 #easteregg, where they found a command log of someone swearing at "this stupid chunk of germanium". I decided to make the help system replicate the #os8 error message in honour of this moment in #pdp12 #VintageComputing history.
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OK, so where did all of this #LINC and #pdp8 stuff from this whoooole thread end up? Well, Dick Clayton from #dec explains in this short interjection at the DigiBarn event:
https://youtu.be/xT_5PcrVI9Q?t=5810
Basically Digital made a weird hybrid LINC/pdp8 system called the LINC-8, but it wasn't that great. So while he was on jury duty, he sketched out the Right Way to do it so that the system could switch between "8 mode" and "LINC mode" *in software*. The result was the #pdp12, which sold more units than all the previous LINC systems combined.
And that takes us to tonight's thread from @tastytronic, where the #umdpdp12 has just had its first successful verification tests of some of its 60-year-old flipchip cards: https://teh.entar.net/@tastytronic/109644812161500698