Human folly for 02022-02-09

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• Yamaha dx7 chip reverse engineering (righto.com):

  #reverse-engineering of the Yamaha DX-7 synthesizer, explaining dynamic logic shift registers with pass transistors, time-division multiplexing, R-2R output attenuator, etc.

• Elliptic curve calculator (cp4space.hatsya.com):

  #Elliptic-curve nomogram calculator, similar to Guy’s 01953 “single-scale nomogram” but actually different #nomography #math

• A zoomorphic nomogram (deadreckonings.com):

  another #elliptic-curve nomogram, with some historical notes. #nomography #math

• Arnold (math.fsu.edu):

  V.I. Arnold says #math is a branch of physics; he is very anti-Bourbaki

• (mathwithbaddrawings.com):

  #CC-BY-NC licensed blog of #math cartoons

• Item (news.ycombinator.com):

  comment thread on #Kartik’s notes “against division of labor in software”

• Division of labor (akkartik.name):

  #Kartik’s notes “against division of labor in software”. Jesus, I still have 1399 tabs open in this window.

• (pnas.org):

  #deep-learning of #truss #metamaterials to instantly generate designs with a given anisotropic #stiffness tensor. #CC-BY

• Invertibletrussdesign (github.com):

  code for #deep-learning of #truss #metamaterials

• No permits no fabs (semiliterate.substack.com):

  why semiconductor #manufacturing doesn’t happen in #USA

• Item (news.ycombinator.com):

  commentary on #Yoda’s jeremiad against standard #C; lots of commentary by Walter Bright

• (arxiv.org):

  #Yoda’s jeremiad against standard #C

• RTM Z80 (github.com):

  "RTM-Z80", a new experimental multitasking #OS for the #Z80

• Turing drawings (maximecb.github.io):

  Drawings done by two-dimensional Turing machines #art by #Maxime Chevalier-Boisvert

• The internet changed my life (pointersgonewild.com):

  how the internet saved #Maxime Chevalier-Boisvert from a schizophrenic mother

• Ost chemistry levitt findlayspracticalphysicalchemistry (archive.org):

  introductory #materials #textbook from 01954

• Are we really engineers (hillelwayne.com):

  #Hillel-Wayne interviewed crossover engineers between software and other disciplines, finding that they nearly all considered software to be “real engineering”

• 8086History (stevemorse.org):

  detailed rundown of the #history of the #CPU #hardware leading up to the #Intel #8086

• Pasmo (web.archive.org):

  "Pasmo" is a #Z80 #asm assembler that can also cross-assemble Z80 programs for the #8086

• (pasmo.speccy.org):

  #Pasmo #Z80 #asm current (02009) site. Jesus, this window still has 1375 tabs open.

• DoD opportunities for open source software (ritwikgupta.me):

  notes on the #USA #DoD CIO open-source software memo

• Cocktail ideas (danluu.com):

  #Dan-Luu comments on how commonly people fall into the trap of thinking fields are simple because they don’t understand them. #Dunning-Kruger

• Polymer lightweight material (news.mit.edu):

  2-D polymer #materials "2DPA-1" by Yuwen Zeng

• Redmi 2 Prime bootloader blocked how to unlock it (forum.xda-developers.com):

  the #Redmi-2 #bootloader is not locked

• MSM8916 mainlining (wiki.postmarketos.org):

  #PostmarketOS #Linux supports the #Redmi-2 chip #MSM8916 except for the camera

• Datasheets (pjrc.com):

  Datasheets for the chips used in the PJRC #Teensy

• (sparkfun.com):

  The #Teensy 4.1 costs US$27 from SparkFun

• Teensy41 (pjrc.com):

  The US$27 #Teensy 4.1 has a dual-issue superscalar 600MHz ARM Cortex-M7, 1MiB RAM, 8GB Flash, and #Arduino IDE support

• China Bitcoin mining ban crypto holdouts ether solana price (fortune.com):

  https://archive.fo/18iQ9 #PRC has banned #Bitcoin mining and in November 02021 did a crackdown to try to get rid of the remaining 10% of holdouts

• (arxiv.org):

  “An Empirical Lower Bound on the Overheads of Production Garbage Collectors” very clever #PDF on #garbage-collection #performance

• (cpcwiki.eu):

  The Amstrad CPC 472 had 72K of RAM for tax reasons but 8K was unconnected #history

• (web.archive.org):

  uses for cheap widespread imaging spectrometers

• Central problem (historytoday.com):

  new book “The Last Empire of #Iran” by Michael Bonner argues the Sassanian shahs at Ctesiphon were the real world center of late antiquity #history

• Lueger (zeno.org):

  Otto Lueger (1843-1911) wrote “Lexikon der gesamten Technik und ihrer Hilfswissenschaften”, with all kinds of machines, available one PNG at a time #ebook #history

• Heres the Scientology sponsored content story that the Atlantic doesnt want you to see (businessinsider.com):

  the #Scientology #Atlantic “sponsored content” #history

• (theatlantic.com):

  Paul Offit thinks a third #vaccination against #covid is a bad tradeoff for young men due to #myocarditis risk

• (academic.oup.com):

  #myocarditis in Hong Kong adolescents due to (?) Comirnaty #covid #vaccination

• (medrxiv.org):

  low child mortality risk from #covid in Germany, CFR of 0.09 per 100,000, no known fatalities under 11 years old

• (medrxiv.org):

  Kaiser #myocarditis #covid #vaccination study

• Imports and exports (eia.gov):

  #USA #petroleum imports and exports up to 02020. #energy

• America collapse (salon.com):

  #collapse scenarios for #USA from 02010; amusing in retrospect

• Life at 800MHz (artemis.sh):

  using an 800MHz Sony Vaio VGN-P588E with 2GiB RAM for everyday computing in 02022

• Fsb raids REvil ransomware gang members (therecord.media):

  #Russia raids #REvil #ransomware gang at 25 residences

• Sn46 (dhammatalks.org):

  food for the factors of awakening, Āhāra Sutta (SN 46:51) #Buddhism #religion

• Stackexchange (archive.org):

  stackexchange data dumps: Stack Overflow is 17.2 gigs for the posts, 4.9 gigs for the comments, 1.3 gigs for the votes #archival Jesus, I still have 1348 tabs open