🧠 Before RISC vs. CISC. Before ARM dominance. Before the cloud. There was the Bellmac 32.

Now officially recognized as an IEEE Milestone, the Bellmac 32 helped define what 32-bit computing would become:

💾 Built in 1977 by Bell Labs, it was one of the earliest 32-bit microprocessors

🔐 Introduced memory protection and supervisor/user modes — setting the stage for modern OS security

🌐 Powered Unix systems, 5ESS telecom switches, and early internet infrastructure

🛠️ A foundational workhorse, now honored for the impact it had behind the scenes

It didn’t make headlines like the 8086 or the 68000 — but it should have. Hats off to the engineers who helped shape the future and are finally getting the recognition they deserve.

#IEEE #BellLabs #TechHistory #Microprocessors #Bellmac32

https://spectrum.ieee.org/bellmac-32-ieee-milestone

32 Bits That Changed Microprocessor Design

<p>Bell Labs’ Bellmac-32 paved the way for today’s smartphone chips</p>

IEEE Spectrum
@viznut I appreciate the fast pacing, sync with audio and video, and the delicate illustrations of those rascals #DonaldTrump & #ElonMusk . At the same time, I love how #microprocessors don't age: decades old hardware can still fight problems of now. #commodore64
Mike Kohn!

Mike Kohn's music, software, and electronics projects.

🤔 Ah, the #nostalgia of cramming ancient silicon with non-existent commands! 🕵️‍♂️ Let's all gather 'round the microcode campfire and be regaled by tales of yore, where #microprocessors were so basic, they didn't know how to say "no." 😂 Remember kids, if it's undocumented, it's basically magic! ✨
https://www.righto.com/2023/07/undocumented-8086-instructions.html #techhistory #undocumentedmagic #siliconstories #HackerNews #ngated
Undocumented 8086 instructions, explained by the microcode

What happens if you give the Intel 8086 processor an instruction that doesn't exist? A modern microprocessor (80186 and later) will gener...

Intel released a new CPU on March 22, 1993. Instead of a part number, it had a brand name. Calling it Pentium instead of 586 helped Intel's problem with clones. https://dfarq.homeip.net/what-came-after-486/ #CPUHistory #ComputerArchitecture #Innovation #TechThrowback #1990sTech #Microprocessors #RetroComputing
What came after 486?

Changing from part numbers had benefits for Intel, but it took time

The Silicon Underground

"Yes, you heard it right: Apache NuttX now supports the Python interpreter on ESP32-S3!

NuttX is a platform that can run applications built with programming languages other than traditional C. C++, Zig, Rust, Lua, BASIC, MicroPython, and, now, Python."

https://developer.espressif.com/blog/2025/03/nuttx-python-esp32s3/

#NuttX #ESP32 #Microprocessors #Python #OperatingSystems #Embedded

Running Python on ESP32-S3 with NuttX

The developer resources in just one place!

Espressif Developer Portal
Has anyone had experience with one of these little logic analyzers? Are they... reasonably useful for basic, low-speed microprocessor I/O debugging? i'm looking to put together a lab kit for a microprocessors course at minimal cost to the students, so $300-400 for, e.g., an Analog Discovery 3 is quite steep an ask.

https://www.amazon.com/HiLetgo-Analyzer-Ferrite-Channel-Arduino/dp/B077LSG5P2

#electronics #maker #microprocessors
Amazon.com

A System For The Sixties: The RCA Studio II

Did you ever hear of the tragedy of the Capacitance Electronic Disc? I thought not. It’s not a story MCA would tell you. It’s an RCA legend. It’s said they h...

A very deep dive.

"This is the story of how Apple made a mistake in the ROM of the Macintosh Classic II that probably should have prevented it from booting, but instead, miraculously, its Motorola MC68030 CPU accidentally prevented a crash and saved the day by executing an undefined instruction."

https://www.downtowndougbrown.com/2025/01/the-invalid-68030-instruction-that-accidentally-allowed-the-mac-classic-ii-to-successfully-boot-up/

#Computers #Microprocessors #InstructionSets #ComputerHistory #RetroComputing

Downtown Doug Brown » The invalid 68030 instruction that accidentally allowed the Mac Classic II to successfully boot up