Robert van Engelen, PhD @engelen.bsky.social

Possessed by math and coding since the 80s, vintage tech enthusiast, steam engines fanatic, CEO/CTO of Genivia, fmr Professor of Computer Science and Scientific Computing | NYC | 🇺🇸🇳🇱 | defend democracy | support 🇺🇦 | please be kind to animals🙏

NYC covered in snow (again) after the blizzard. Magical to walk in Central Park. The peace and tranquility of these views remind me of old Dutch Masters winter landscape paintings.
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Notice something? Software bugs are proliferating everywhere fast. Almost daily something that used to work, now glitches. Besides being annoying, it’s embarrassing and may lead to serious accidents. Hire good engineers for crying out loud. And don’t rely on AI to mess up, for real engineers to fix.
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Psion 5mx, the pda of the 90s. It’s very useful, perhaps even today. Has a usable keyboard. Runs a full month on a pair of AA batteries! The 90s hi-res 4 gray shades LCDs aren’t the most legible. Backlight helps a bit. Did you have one? Like it or exchange it to something else of the same period?
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adafruit @adafruit.com
2mo
gm rise and grind, since 1979... WHAT IS YOUR PROBLEM
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George Conway ⚖️🇺🇸 @gtconway.bsky.social
2mo
@davidfrum.bsky.social
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Shipwreck @shipwreck75.bsky.social
3mo
Trump says the US "needs" Greenland for security reasons. But Danish officials have already offered him the ability to increase America's military presence there.

“The option has been on the table...the White House is not interested.”

www.politico.com/news/2026/01/06/trump-says-his-greenland-fixation-is-about-national-security-europeans-are-skeptical-00712149
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ASML is an amazing company with amazing “unreasonable” people (watch to understand what that means). As a kid in the 80s I was lucky to visit Philips NatLab where my dad worked on silicon wafers to analyze properties of IC etching. But that was long before ASML youtu.be/MiUHjLxm3V0?si=DX37a1qXT4hKs2A2
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Retro Dream @retrodream.bsky.social
4mo
Part of my studio.
Real stuff nostalgia: CRT scanlines, genuine hardware, loading from floppies, using ball mouse and wild joystick!
Re-creating the same gaming conditions as back then. That's my philosophy.
Here's how I build my setup : youtu.be/BhgM-b59cKI
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The Tennessee Holler @thetnholler.bsky.social
4mo
We are failing our kids
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Yesterday’s chore: fighting back Entropy by recombining kids Lego pieces back into complete sets to save. But Lego fought back with some brittle brown pieces self-destructing in my hand 💥 So sad 😔
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Toshiba HX-10 AA checkup and cleaning. Mechanical Alps keyboard is rock solid and very nice to type on. Having great fun with this industrial-looking beauty. Good to have and use for my ForthMSX development and testing with MegaRam and PicoMSX+. #MSX #Forth
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Fixed! RGB output via Scart Looks amazing (compared to composite). A tiny bit of jailbars effect on the blue background, something to fix later perhaps. Likely some other caps that are out of spec.
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Fixing a Sony Hit Bit 75B 1983. Let’s see if this baby works. I suspect it was not turned on for decades, as the 240V UK power cord was cut off. Got that fixed. But before I power this thing on, I want to replace the two crusty filter caps at the 462 and 473 transistor boards above a huge heat sink.
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DelaneyKirk @delaneykirk.bsky.social
5mo
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🎃 "Headless Slicer" cuts deep on Halloween nights 😱 Can you guess what it does? Some new retro wizardry Forthcoming! #retro #halloween #msx #forth #compiler #z80
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Happy retro Halloween! 🎃
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Jason Moore @moorejh.bsky.social
5mo
But does it connect to an Atari or Commodore 8-bit computer? Or maybe a 2-bit computer?
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Thomas Cherryhomes @tschak909.bsky.social
6mo
I keep trying to tell people about #FujiNet.
That it is a WiFi adapter for your favorite #Atari8bit, #Apple2, #ColecoAdam, #TRS80CoCo, #Commodore, #Atari2600, #AtariLynx, and #MSDOS machines, with more to come.

But word isn't getting out.

Can u help?

fujinet.online/
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Made some progress! Got MSX VDP and VRAM access and control in ForthMSX now working. Playing around with a bit of Forth code to twinkle bitmapped stars live on screen in text mode (picture only below, sorry no GIF). Much faster than BASIC on my Sony MSX2. #MSX #Forth #Z80 github.com/Robert-van-Engelen/ForthMSX
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🎉 ForthMSX is now available as open source on GitHub GitHub.com/Robert-van-Engelen/ForthMSX
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More fun stuff this weekend with my new Forth system for the MSX. New Forth words for floats using the MSX built-in Math Pack and new Forth file system words using MSX-DOS1. Forth internals are mostly written in assembly for speed. Next up are graphics+sound for game dev. #MSX #Forth #z80 #assembly
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Sharpworks @sharpworks.bsky.social
6mo
#Sharptember A chance find amongst a bunch of tapes I won in an auction turned up something pretty interesting, a compilation tape of games written by Col Needham (the inventor of IMDb) and possibly his master tape from which he sold his mail order games. Here's his game "UFO Attack".
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Having fun coding a new Forth interpreter/compiler in Z80 assembly for the MSX. Making it wicked fast, based on Forth850 that I wrote for the Sharp PC850. MSX Pico+ is a *fantastic* cartridge to get my files over wifi. No AI coding assistance needed, thank you. #MSX #forth
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[The Great War & Modern Memory] @ps9714.bsky.social
7mo
#RIP Robert Redford.

➡️BREAKING: Robert #Redford, the actor and director who sailed to Hollywood stardom with turns in classics such as “Butch Cassidy and the Sundance Kid” and “All the President’s Men” died Tuesday morning at his home in Utah.

He was 89.
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I’ve updated tinylisp in 99 lines of C. Adding color output to Lisp traces in the “extras” version. Also added backquoting/unquoting and some more examples. #lisp github.com/Robert-van-Engelen/tinylisp
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Didn’t think it was possible, but Super Mario World runs on MSX2 (Sony HB-F1XD) with MSX Pico+ cartridge. Sound and music with SCC on the audio jack. Brilliant! #MSX
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Insta Science @instascience.bsky.social
9mo
Blue Ghost's view of the moon at 100km altitude.

-Credits: NASA
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Jason Moore @moorejh.bsky.social
9mo
Open Circuits is a photographic exploration of the beautiful design inside everyday electronics. Its stunning cross-section photography unlocks a hidden world full of elegance, subtle complexity, and wonder. amzn.to/3H6M1H8 #electronics #photography
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Tinylisp in 99 lines of C added an "extras" version with more user-friendly features and runtime optimizations explained in the accompanying article. #lisp github.com/Robert-van-Engelen/tinylisp
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