Jack Eisenmann’s Duo Binary runs on an ATTiny84-20PU #AVR with 128K of SRAM and 2MB of Flash #hardware. Six-bit binary character code, short pulse for 0, long pulse for 1. Has a filesystem browser, text editor, calculator, and number guessing game. #smallisbeautiful
Documentary “Farewell — ETAOIN SHRDLU” about the last day of hot-metal typesetting at the New York Times in 1978.
The FCC OET EAS can often tell you about unannounced #hardware products and give you unannounced technical details on announced ones
onchipUIS wants to make #free-software #hardware: “have designed and taped out a #RISC-V implementation with Cortex M0-like characteristics.”
Midwest #RepRap Festival. Lulzbot seems to be catching up; dual-head extruders; SeeMeCNC’s auto-leveling with accelerometers. #3D-printing #hardware
#3D-printing #hardware from Wanhao: the Duplicator i3 costs “somewhere between 300 and 500 dollars”. Folded sheet metal, based on the Prusa i3, with an MK10 extruder, LM8UU linear bearings, Acme leadscrews with brass nuts, and cable chains.
a Zortrax M200 printer caught fire because the heater cartridge fell out because its owner didn’t properly tighten down the nut and the firmware didn’t notice. #3D-printing #hardware #safety
“#L4 #microkernels: The lessons from 20 years of research and deployment” 2016 #paper on #kernels #operating-systems #toread
How to read and write the Flash on an #AVR
#CPM on an ATMega88 #AVR with external DRAM and an SD card. Slow, takes 30 seconds to boot. The #Z80 #emulation is somewhat incomplete. Still, a super fun #hardware project.
#hardware for reading FT2232H NAND #Flash for #reverse-engineering
NOR #Flash transactional #filesystems #paper
a new #DSP library for music processing under Affero GPL: “an extensive collection of reusable algorithms which implement audio input/output functionality, standard digital signal processing blocks, statistical characterization of data, and a large set of spectral, temporal, tonal and high-level music descriptors”
#paper on #filesystems with high #performance on NAND #Flash by using multiple channels
2009 #paper on improving #hardware #performance to get phase-change #memory to be very nearly as fast as DRAM, but nonvolatile. “A baseline PCM system is 1.6x slower and requires 2.2x more energy than a DRAM system. Buffer reorganizations reduce this delay and energy gap to 1.2x and 1.0x, using narrow rows to mitigate write energy and multiple rows to improve locality and write coalescing.” Presumably this is behind the #crosspoint stuff that Micron and Intel plan to launch next year? #persistent-memory
#paper on #memory #performance using “hybrid main memory” such as a DRAM cache layer over #Flash, as a stopgap until phase-change memory or something like that arrives.
2016 #USA presidential election forecast (today: #Trump has 17.8% chance with the polls-only forecast, 21.1% with the polls-plus forecast)
description of a computing workshop taught by Ramsey Nasser where the students ran a program without using a computer
Computadora Industrial Abierta Argentina (Proyecto CIAA) #hardware from #Argentina using an NXP LPC4337 microcontroller (US$13; the same one on the US$26 LPCXpresso board) for SCADA applications.
#Lithium is up from US$7k to US$20k per tonne, mostly mined by Rockwood, Sociedad Quimica & Minera de Chile, Albermarle, and FMC; will probably crash soon
Mathematica notebooks about combinatoric card games
#Valproate enhances #neuronal-plasticity, and maybe its inhibiting of histone deacetylase can affect #epigenetics and reverse effects of early stress? #neuroscience
a #nuclear #energy plant was attacked via computer #security problems “two to three years ago” which caused “some disruption”
The archives of the short-lived #ArsDigita Systems Journal
jokey #Video of mining and timber-framing a mine by Cody, the #CodysLab guy from Logan, Utah, who refined diamonds and platinum from the street. Demonstrates assaying efflorescence for nitrate with charcoal and a modern Geiger counter, showing that the radioactivity inside the mine is four times lower than outside, 0.02 μSv/h. #bootstrapping
“Amsterdam Catalog of #Csound Computer Instruments”, algorithmic #music information from 1995 with full explanation and source code; very creditable brass instruments with FM synthesis in 22 lines of code, stuff like that
Dry rot requires a minimum of 28% moisture content in timber to get started, but can remain active when moisture gets down as low as 20%. Unless “true dry rot” exists.
Voter ID laws blocking eligible voters from voting in #USA
Chokecherry is edible (though usually unpalatably astringent), but its leaves poison horses, moose, cattle, etc.
Overtone is a livecoding environment for #music with #Clojure and #SuperCollider. Fabienne recommended it
#CodysLab #video with beekeeping, chokecherries, and flame-cutting and #welding steel with an oxyhydrogen torch. And MELTING TUNGSTEN. And a crude version of the Birkeland-Eyde process, assayed with calcium carbonate. #bootstrapping #materials
#CodysLab #video where he oxidizes aluminum with lye with a teakettle and fishtank to separate hydrogen and distills it out. #materials #bootstrapping
WaPo argues that #Twitter #censorship of Zeynalov for #Turkey is bad
32-bit #CRC in a long line of Python
Code golf of 32-bit #CRC; it’s 30 bytes in i386 machine code, beating even the Jelly #esolang at 34 bytes. Pyth gets it down to 28.
Short #introduction to how virtual memory works, mostly for novices but also explaining why strict overcommit works so poorly in #Linux
25 new fragments of “Dead Sea Scrolls” of uncertain provenance found in antiquities markets #archaeology
playing with #aarch64 #ARM #asm with helloworld in qemu and a cross-compiling toolchain. cc-by-nc-sa
PubPeer is doing anonymous post-publication peer review, changing the nature of scholarly communication. #science
#CodysLab #mining episode where he finds (possibly) silver ore in his mine, demonstrates drilling rock and blasting using a gasoline generator, and sets up a photovoltaic-powered LED array (a perversely inefficient means of illumination) for indoor growing of peas and whatnot. #bootstrapping