Yikes. .io is expensive these days. But I’d be sad to retire projectf.io.

Demoscene Report 27 May 2026 youtu.be/x2qoajlkIzA

I've uncovered and fixed a bug in my graphics scaling hardware. My room temperature's down 3ºC on last night. Good times.

Temperatures at Teddington Bushy Park have hit 32.8°C, provisionally equalling the all-time May record🌡️ Temperatures will continue to rise through the afternoon, we'll be giving updates here ☀️

sneak peek at Glasgow revD0 designed by Elen Eisendle / Fully Automated!

AMD (Xilinx) are no longer supporting Linux in the free version of #Vivado. You need to pay at least $1200/year! www.amd.com/en/products/... This makes no sense to me. This will make it harder for people to learn and get into #FPGA. 🤔

How to emulate an Atari YM2149 audio chip on Amiga at litteraly 0 CPU cost: arnaud-carre.github.io/2026-05-15-y... “…pure square waves sound rather bland and certainly not epic enough to accompany a future Amiga sin-dots world record.”

"The 64-bit BEAR contains the address of the last instruction that broke the sequential execution of instructions" - Why am I reading about z/Architecture? 🤔

Have you upgraded your @yosyshq.com yosys recently? #FPGA 0.49 (Jan 2025): TRELLIS_COMB: 4357 0.64 (May 2026): TRELLIS_COMB: 3682 15% LUT saving with no change in my Verilog design. 👏

Macintosh HyperQuadra

Just merged 🏝️ Isle.Computer graphics refactor, fixing many small issues and general clunkiness. github.com/projf/isle/p... Working on a computer from scratch requires learning so many things in so many areas, from FPGA fanout, to Unicode, RISC-V asm, and Bresenham's line algorithm. 😅 #FPGA

Have you upgraded your @yosyshq.com yosys recently? #FPGA 0.49 (Jan 2025): TRELLIS_COMB: 4357 0.64 (May 2026): TRELLIS_COMB: 3682 15% LUT saving with no change in my Verilog design. 👏

I just voted 🗳️ in the Hastings and East Sussex #elections.

The TMDS clock wasn't meeting timing on #ULX3S. There is so little logic in the clk_pix_5x domain I doubted I could do much. Then I realised each channel shared a small critical ring counter. Giving each colour channel its own added 100 MHz+ to the max frequency! #FPGA 🚀 github.com/projf/isle/b...

Want to get your hands on a real lithography photomask? How about some silicon wafers? Enter our demoscene competition for a chance to win one! tinytapeout.com/competitions... Last 6 days to get involved! #demoscene #opensource #ASIC

Made some time for 🏝️ Isle.Computer today. Getting the graphics registers working across clock domains so the CPU can double buffer, scroll, adjust transparency etc. #FPGA Images show RISC-V CPU reading graphics registers in sim and on #ULX3S.

Just when you thought GPU pricing had lost the ability to shock. A mobile 5070 for £1150! 😮

French bram is on another level. #fpga

Sometimes the wrong palette turns out right.

Verilog error message of the day: "Illegal character in binary constant: 2". Yes, I'm appalled at myself too.

Hey, I wrote a thing about AI in astrophysics ergosphere.blog/posts/the-ma...

Announcing the second Tiny Tapeout demoscene competition! Free silicon space for all entrants! tinytapeout.com/competitions...

Adding an enable signal to 🏝️ Isle.Computer drawing engine was more of a pain than I expected, but we're now ready to share vram access with the CPU. On the plus side, this also allows you to slow the action down so you can see the drawing happen. #FPGA #verilog

I'm considering moving my git repos to #Codeberg (from GitHub). If you have open source projects on Codeberg, I'd be interested to learn from your experience. I host my own web sites, so it's only the core git stuff I need to worry about. 🙏

Sometimes you need to ship it and call it a night, so I give you 🏝️ Isle.Computer Chapter 6 - Input Output: projectf.io/isle/input-o... Adds input hardware, uart, Isle edition of FemtoRV "Gracilis" RV32IMC CPU, software library in #riscv asm, Verilator/SDL sim improvements... #FPGA

TFW you realise something obvious. "Somebody to Love" is Queen doing gospel. And what a song it is when turned up to 11. # each morning I get up, I die a little...

Is anyone surprised by this anymore? “Around the time when Facebook was arguing that it was just a ‘mirror to society’, internal documents shared with the BBC… reveal how the company knew it was amplifying content which angered people and even incited harm.” www.bbc.co.uk/news/article...

Happy #MARCHintosh for those who celebrate. 🥳 You might enjoy my Macintosh history series based on MacUser: systemtalk.org/post/macinto... No ads, no slop, just classic Mac goodness. ☺️

I’m impressed by Ars Technica. Some will argue they should have acted more quickly, but most publications would have done nothing beyond an empty apology. futurism.com/artificial-i...

Over the weekend I worked on 🏝️Isle.Computer designs for chapter 6. I've now added the designs to a branch and you can already run the sim on your PC (Linux/Mac/Windows): github.com/projf/isle/t... Please have a quick play and let me know how you get on. 🛝

Sometimes Wikipedia gives you more than you dared hope (animated PNG). en.wikipedia.org/wiki/River_c...

I’ve been thinking about software on simple systems. How much it depends on trigonometry and randomness to give it life.

# sunshine on a rainy day # makes my soul, makes my soul # drip, drip, drip away

I found the old 35mm slide for the cover for Neuromancer and had it scanned in for your pleasure. Enjoy!

This Hastings shop wants you to STOP! 🙀 Though I'm now thinking of @gossjam.bsky.social.

I searched for "gnu assembler directives" (without quotes) and the top match on DuckDuckGo and Google is: ftp.gnu.org/old-gnu/Manu... Looks promising apart from the fact it's from 1994! Back when my computer was an Amiga 1200 and Linux 1.0 was released. Current docs: sourceware.org/binutils/doc...

After 21 days without sunshine, Aberdeen recorded its first sunshine since 21st January this afternoon 😎

It's easy to make someone's day. When someone shares something beautiful or cool they've made, don't just favourite, take 30 seconds to write a comment. ✍️ Trite? Yes. But we still need reminding.

Well that’s one way to lose these walking blues. Diamonds on the soles of our shoes.

What do C++ devs think of Google's convention of naming class data members with a trailing underscore? google.github.io/styleguide/c... uint32_t cnt_ = 0; This looks odd to me, but it's been a while since I've done much C++. Verilator simulation is giving me cause to get back into it a bit.

Work on 🏝️ Isle #FPGA computer input chapter continues. Here I’m testing UART with #ULX3S dev board.

“While the RISC-V specification provides strong security primitives… implementations consistently choose insecure defaults… The decisions vendors make today… will be baked into billions of chips we cannot patch.” #riscv #fosdem fosdem.org/2026/schedul...

“While the tradition remains popular in the 21st century, studies have found no consistent association between a groundhog seeing its shadow and the subsequent arrival time of spring-like weather.” — Wikipedia

Saying a Makefile link command out loud is strange: "dash R dollar caret, dash O dollar snail..." 🐌 I guess that's an AT not a snail, but after the carrot (caret) I unconsciously chose to say snail.

A thoughtful and informative article from Wiki Education on LLM use in #Wikipedia: wikiedu.org/blog/2026/01... “Our fundamental conclusion about generative AI is: Wikipedia editors should never copy and paste the output from generative AI chatbots like ChatGPT into Wikipedia articles.”

No #FPGA data sheets for you today! Lattice reminding us of the good old days of the Internet.

Happy #FPGAFriday. I'm starting work on the next part of 🏝️Isle #FPGA Computer. I'm looking at input and the early system library. UTF-8 is surprisingly easy to decode in assembler; that's not some sort of humble brag, it's a testament to the design of UTF-8.

It’s interesting that early microprocessors, such as the 6502 and Z80 have interrupts, but many open-source #RISCV designs do not. 🤔 Not having interrupts makes practical computer design both simpler and more complex. 🏝️ Isle #FPGA computer doesn’t yet have interrupts, and it’s testing my ingenuity.

The arithmetic/logic unit (ALU) in the Intel 8086 processor (1978) is more complicated than you might expect, performing 28 different operations from addition and logical AND to shifts and BCD adjustment. A special control circuit reconfigures the ALU for each operation. Let's look closer...

Definitely worth 40 minutes of your time if you're into embedded OS, RISC-V, Rust, or FPGA. MMUs are cool (nice to see a shoutout to the 68030) and Xous looks like a fascinating project. #39C3 www.youtube.com/watch?v=BbWW...