Microcontroller firmware, FPGAs, SW Defined Radio, Retrocomputing Damned dirty ape Call sign N2ES he/him cis male Not a tame programmer
Denver metro
Joined October 2007
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๐บ๐ฆ Nonstandard Nerd retweeted
New fastest shortest-path algorithm in 41 years!
Tsinghua researchers broke Dijkstraโs 1984 โsorting barrier,โ achieving O(m log^(2/3) n) time. This means faster route planning, less traffic, cheaper deliveries, and more efficient networks - and a CS curriculum revamp =)
๐บ๐ฆ Nonstandard Nerd retweeted
I worked at Apparat as well .. I was the last support technician for NEWDOS/80.
Good times while it lasted!
๐บ๐ฆ Nonstandard Nerd retweeted
ENIAC did not have a concept of โbyteโ. What is this really called?
๐บ๐ฆ Nonstandard Nerd retweeted
Not a byte, not RAM, but it is from ENIAC in 1946.
That tube module holds one decimal digit. It's from an "accumulator", which counts and stores numbers. It uses 10 tubes in a ring counter to hold the values 0 through 9. Bytes didn't exist at the time.
archive.computerhistory.org/โฆ
ALT A diagram showing the components of the ENIAC accumulator: transmitting circuit, carry-over circuit, pulse standardizer, decade ring counter, and neon bulbs.
ALT A schematic of the decade ring counter from "Electronic Computing Circuits of the ENIAC"
๐บ๐ฆ Nonstandard Nerd retweeted
OK... they tell me I should go on Twitter to tell a bit about the coming PiDP-10. And tell the story of the past year. Scary. social? media? Not really me.
But: in a month or two, you can have a PDP-10 in your living room. groups.google.com/g/pidp-10
#PiDP10
๐บ๐ฆ Nonstandard Nerd retweeted
An archive of the Incompatible Timesharing System Boot Camp orientation live stream can be found here
toobnix.org/w/cc9df0ae-9366-โฆ
#retrocomputing #vintagecomputing #ai #lab
๐บ๐ฆ Nonstandard Nerd retweeted
I did have to pause and check that this wasn't a @NanoRaptor project :-)
๐บ๐ฆ Nonstandard Nerd retweeted
TIL "breadboard" comes from people using literal bread cutting boards as the base for their electronics back in the day
ALT The Grimes Inverse Duplex on a cutting board
๐บ๐ฆ Nonstandard Nerd retweeted
I love the @wavedrom plugin for VisualCode. It's so nice to be able to do timing diagrams right there and not have to use a standalone app or online service.
๐บ๐ฆ Nonstandard Nerd retweeted
Intel's Israel site was opened in 1974, Intel's first design and development center outside the US. In this thread, I'll look at some of the important vintage chips designed at Intel Israel, such as the 8088 processor. 1/10
ALT A photo of Intel's first site in Israel, a three-story building in Haifa.
๐บ๐ฆ Nonstandard Nerd retweeted
MK51, a single-chip RPN calculator from ะญะปะตะบััะพะฝะธะบะฐ. The program ROM is on the right side, but bits are not surface visible. Maybe I can reveal them with delayering or a Dash etch.
๐บ๐ฆ Nonstandard Nerd retweeted
Toshiba TC54256 from a @TICalculators TI 81 graphing calculator. This is an OTP ROM, an EPROM with no quartz window for erasure. You can read it electrically with a standard reader, but you won't be photographing the bits with an optical microscope like a mask ROM.
cc @ticalcorg
๐บ๐ฆ Nonstandard Nerd retweeted
Announcing Project MemTech: documenting modern memory technology
Images: STM32F407 SRAM
๐บ๐ฆ Nonstandard Nerd retweeted
STM32F407VGT6 lapping down to mechanically remove one layer at a time
๐บ๐ฆ Nonstandard Nerd retweeted
The M2351 is one of three glitching targets in @ghidraninja's excellent TrustZone-M(eh) lecture from 36C3.
youtube.com/watch?v=4u6BAH8mโฆ
