Human folly for 02023-07-08

older newer index

• (my.calcs.quest):

  Hooloovoo's collection of 67 portable graphing #calculators, including #68000 models from #TI

• 68K:Thecalcs (tibasicdev.wikidot.com):

  #introduction to #TI #68000 #calculators

• Inve mem (oa.upm.es):

  this #adobe #materials #construction #paper #PDF on Aveiro district in #Portugal cites the “2009 New Mexico earthen building materials code” and found mean compressive strengths in Aveiro from 0.66 MPa to 2.15 MPa, with modulus of elasticity from 50-450 MPa and tensile strengths from too low to measure up to 0.40 MPa (typically 10-20% of compressive strength), with rather astonishing strains at peak stress of 5-10%. Adobe from Colombia and Morocco was much stronger. #strength-of-materials

• Call options bad code (infoq.com):

  "unhedged call options" is a better term than #technical-debt

• Towards an understanding of technical debt (kellanem.com):

  Kellan doesn't like calling things #technical-debt

• Log (apenwarr.ca):

  #apennwarr does like the #technical-debt term

• Yosys austrochip2013 (yosyshq.net):

  #PDF of the original #yosys #paper from 02013

• Chapter74 (fpgakey.com):

  explains gate array semicustom ASIC #hardware

• RF diffusion now free and open source (bakerlab.org):

  "RF Diffusion" #protein-design #neural-networks #AI

• Five ways AI might destroy the world everyone on earth could fall over dead in the same second (theguardian.com):

  #divulgation of the #AI risk problem

• 20220118 ASIC roundup of open source riscv CPU cores (bitlog.it):

  #RISC-V #performance simulation, covering #SeRV, #PicoRV32, Minerva, Hazard3, FemtoRV32, #VexRiscv, and the author's own Misato.

• (ieeexplore.ieee.org):

  “A Two stage CMOS OPAMP with frequency compensation has been designed using open source Google’s #SkyWater 130nm Technology. This OPAMP operates at 1.8V of Vdd single supply voltage. This circuit has been designed and simulated using eSim open source #EDA tool developed by IIT Bombay.” #electronics #hardware

• OpenLANE SKY130 physical design workshop (github.com):

  notes from a #tutorial workshop on how to use #Yosys with the #Skywater PDK, etc., as part of "OpenLANE" #hardware #electronics

• PLL IC design using open source PDK Google Skywater 130nm (github.com):

  another #Skywater PDK #tutorial #hardware #electronics #EDA

• (forum.ulisp.com):

  #ARM #Thumb instruction set encoding. Ugh. A full assembler in Lisp for Thumb. #asm

• Riscv Linux system calls (github.com):

  how to invoke Linux system calls on #RISC-V.

• (pagetable.com):

  Chip Morningstar's Habitat and Macross source code for the #6502 found! #retrocomputing #history

• OpenRAM %20fossi%20dial up%202020 (ef.content.s3.amazonaws.com):

  #PDF of slide deck. "OpenRAM" #hardware design supports #Skywater and others. Nice schematic of three-port 12-transistor SRAM cell! In SKY130 the single-port 6T cell is 1.2μm × 1.58μm; dual-port is 2.40μm × 1.58μm; single-port with straps is 2.49μm × 1.58μm; dual-port with straps is 3.12μm × 1.97μm. By comparison a D flip-flop is 5.83μm × 7.07μm.