Advertisement · 728 × 90

Posts by Rostislav Opocensky

Finally, I’m with artists on this one. Sure you can get an LLM to produce you a picture. But where’s the spark of creativity? The “I”? I don’t want statistically likely art thank you. Same for code. Good programming is an art. I want more Geoff Crammonds, Ian Bells and Joffa Smiths please.

1 week ago 22 2 1 0

The peak, ironically, was around November 2024.

2 weeks ago 44 3 3 0
Preview
Conditions in the Intel 8087 floating-point chip's microcode In the 1980s, if you wanted your computer to do floating-point calculations faster, you could buy the Intel 8087 floating-point coprocessor ...

Intel announced the 8087 floating-point chip in 1980. Now I have a blog post that explains a small part of the microcode in this chip.
www.righto.com/2025/12/8087...

3 months ago 96 21 2 0
Preview
Kimmel reinstatement preempted Disney+ price increase The Handbasket reported first Monday evening on Bluesky

"More than a million people had canceled Disney streaming subscriptions as of Monday, the Disney source told me, and the company likely knew that trend would only continue the longer they kept Kimmel silenced."

@marisakabas.bsky.social w/ a doozy. 👀

6 months ago 1905 547 76 103
The cover for the book 'Why Q Needs U' by Danny Bate

The cover for the book 'Why Q Needs U' by Danny Bate

With pride, joy and a great deal of nerves, I'd like to reveal the cover for my book 'Why Q Needs U'!, published by @bonnierbooksuk.bsky.social!

I love the cover, with the endorsement from its first reviewer, who also called it "a wonderful achievement" and "just couldn't recommend it more highly".

8 months ago 255 53 26 3
Preview
Curl creator mulls nixing bug bounty awards to stop AI slop : Maintainers struggle to handle growing flow of low-quality bug reports written by bots

Curl creator mulls nixing bug bounty awards to stop AI slop

8 months ago 2 1 0 0
Post image

Russian state disinfo bots are active on BlueSky for over 2 weeks now.
They are posting fake videos using AI-generated voice to promote talking points of Russian state.

Please help us to reduce its visibility: follow this labeler, choose Warn or Hide; spread the word:
@ab4n-labeler.bsky.social

1 year ago 1451 1052 55 264
Advertisement
Three large electrolytic capacitors, Mallory (35,000µF 50V), Nichicon (22,000µF 35V), Kemet (30,000µF 25V) in a homage to the Class sketch from the Frost Report.

Class Sketch (The Frost Report, 1966)

Cleese:

(In bowler hat, black jacket and pinstriped trousers) I look down on him (Indicates Barker) because I am upper-class.

Barker:

(Pork-pie hat and raincoat) I look up to him (Cleese) because he is upper-class; but I look down on him (Corbett) because he is lower-class. I am middle-class.

Corbett:

(Cloth cap and muffler) I know my place. I look up to them both. But I don’t look up to him (Barker) as much as I look up to him (Cleese), because he has got innate breeding.

Cleese:

I have got innate breeding, but I have not got any money. So sometimes I look up (bends knees, does so) to him (Barker).

Barker:

I still look up to him (Cleese) because although I have money, I am vulgar. But I am not as vulgar as him (Corbett) so I still look down on him (Corbett).

Corbett:

I know my place. I look up to them both; but while I am poor, I am honest, industrious and trustworthy. Had I the inclination, I could look down on them. But I don’t.

Barker:

We all know our place, but what do we get out of it?

Cleese:

I get a feeling of superiority over them.

Barker:

I get a feeling of inferiority from him, (Cleese), but a feeling of superiority over him (Corbett).

Corbett:

I get a pain in the back of my neck.

Three large electrolytic capacitors, Mallory (35,000µF 50V), Nichicon (22,000µF 35V), Kemet (30,000µF 25V) in a homage to the Class sketch from the Frost Report. Class Sketch (The Frost Report, 1966) Cleese: (In bowler hat, black jacket and pinstriped trousers) I look down on him (Indicates Barker) because I am upper-class. Barker: (Pork-pie hat and raincoat) I look up to him (Cleese) because he is upper-class; but I look down on him (Corbett) because he is lower-class. I am middle-class. Corbett: (Cloth cap and muffler) I know my place. I look up to them both. But I don’t look up to him (Barker) as much as I look up to him (Cleese), because he has got innate breeding. Cleese: I have got innate breeding, but I have not got any money. So sometimes I look up (bends knees, does so) to him (Barker). Barker: I still look up to him (Cleese) because although I have money, I am vulgar. But I am not as vulgar as him (Corbett) so I still look down on him (Corbett). Corbett: I know my place. I look up to them both; but while I am poor, I am honest, industrious and trustworthy. Had I the inclination, I could look down on them. But I don’t. Barker: We all know our place, but what do we get out of it? Cleese: I get a feeling of superiority over them. Barker: I get a feeling of inferiority from him, (Cleese), but a feeling of superiority over him (Corbett). Corbett: I get a pain in the back of my neck.

I am Mallory, I used to be part of a mini-computer. I look down on them.

I am Nichicon, I look up to him because he is bigger than a can of beans, but I look down on him because he didn't even come with screws or a mounting bracket.

I am Kemet. I know my place.

10 months ago 28 3 2 0
Preview
The Copilot Delusion Disclaimer: This post was written May 2025, and the arguments apply to AI code capabilities at this time. The arguments around lack of competence are certainly likely to become less prevalent-while th...

No notes.

deplet.ing/the-copilot-...

10 months ago 16 5 1 2

I’m just happy that folk still appreciate old computers, be it the games, the culture, or the hardware. I live for the relative simplicity and ingenuity of old electronics, and the software that drives them.

10 months ago 19 2 1 0
A die photo of the Intel 386 processor. It looks a bit like an aerial photo of a weirdly-zoned city, with rectangular blocks of various textures in a complicated arrangement. The functional units of the chip are labeled. In particular, the Prefetch Unit is near the upper left corner. A large red rectangle is labeled Prefetch Queue.

A die photo of the Intel 386 processor. It looks a bit like an aerial photo of a weirdly-zoned city, with rectangular blocks of various textures in a complicated arrangement. The functional units of the chip are labeled. In particular, the Prefetch Unit is near the upper left corner. A large red rectangle is labeled Prefetch Queue.

Anyone use Intel's 386 processor from 1985, the first 32-bit x86? To improve performance, it preloaded instructions into a 16-byte prefetch queue (highlighted in red). Why does such a small queue take up so much of the chip? Let's look under the microscope at its complicated circuitry... 1/N

11 months ago 110 21 2 0
Post image

When you make a Monty Python co-founder laugh out loud. 💕

11 months ago 16422 3137 899 226
Preview
Man speaks to killer from beyond the grave in Arizona courtroom through AI video An AI video of Christopher Pelkey forgave his killer in court in what officials believe was the first use of AI to deliver a victim impact statement.

Making a mental note to amend my will to ensure no one tries any of this Black Mirror nonsense after I’ve died.

11 months ago 15 2 2 0

Thanks to every one who helped me to raise funds for drone defense and (with Mark Hamill) mine clearing robots and (with Slawek Sierakowski) evacuation vehicles. You saved lives. We will keep going.

11 months ago 1461 275 17 4
Advertisement
1981: How COMPUTER GRAPHICS Will Change the World | Horizon | Retro Tech | BBC Archive
1981: How COMPUTER GRAPHICS Will Change the World | Horizon | Retro Tech | BBC Archive YouTube video by BBC Archive

Watching this at the mo. Used to watch Horizon a lot as a kid.

11 months ago 34 11 8 1
Minstrel 4th with Keyboard

Minstrel 4th with Keyboard

Minstrel 4th running a Forth program

Minstrel 4th running a Forth program

Minstrel 4th running a BASIC program

Minstrel 4th running a BASIC program

Minstrel 4th with all the trimmings

Minstrel 4th with all the trimmings

New blog post - Minstrel 4th is back, with some new tricks
blog.tynemouthsoftware.co.uk/2025/05/mins...
* Z80 based kit, 49K RAM, 2K video RAM.
* Jupiter Ace Compatible Forth
* Z80 machine code monitor
* ZX80 BASIC
* RC2014 expansion slot
May the 4th be with you.
www.tindie.com/products/tyn...

11 months ago 21 8 2 0
Video

REPORTER: Amazon will soon display a number next to the price of each product that shows how much the Trump tariffs are adding. Isn't that a perfect demonstration that it's the American consumer who is paying for these policies?

LEAVITT: This is a hostile and political act by Amazon.

11 months ago 8535 2051 1516 995
Preview
OpenAI's most capable models hallucinate more than earlier ones Researchers say the hallucinations make o3 "less useful" than it would be.

OpenAI's most capable models hallucinate more than earlier ones buff.ly/vcIjaM0

11 months ago 3 1 1 0
Tweet from JD Vance:

"Today I met with the Holy Father Pope Francis. I am grateful for his invitation to meet, and I pray for his good health."

Tweet from JD Vance: "Today I met with the Holy Father Pope Francis. I am grateful for his invitation to meet, and I pray for his good health."

Could JD Vance please also pray for the good health of Vladimir Putin?

11 months ago 2561 593 68 40
Post image

Wow, I now have 2,500 followers! Thank you for following me and reading my posts. It's great being able to interact with you about the golden age of game development and hopefully give you an insight into how games were made. Plenty more to come. Please share this post or add me to you Starter Packs

11 months ago 69 12 3 1

Loving the posts - thanks! Keep 'em coming!

11 months ago 2 0 1 0

Yeah, they've got information at their fingertips - anytime, anywhere. And no R Tape loading errors.

1 year ago 1 0 0 0
Advertisement

So it was just the original Sinclair manual for the instruction set, and nights and nights of disassembling and studying games. Happy days!

1 year ago 1 0 1 0

Thanks for the tip. I didn't know that book. Back in the day in communist Czechoslovakia there were no books available - at least until ’88 or ’89, when an official (but apparently illegal) translation of O'Hara’s and Logan's book was published.

1 year ago 2 0 1 0

Bought it a couple of years ago and enjoyed it almost as religiously as The Complete Spectrum ROM Disassembly. A must-read - not just for those of us who spent their best years coding in Z80 assembly...

1 year ago 2 0 1 0
Preview
Why are sine waves so common? A simple question that takes some effort to answer in a satisfying way.

Why are sine waves so common?

lcamtuf.coredump.cx/blog/sines

1 year ago 8 2 0 0

Anyone who knows anything about cyberattacks knows that “IP addresses originating in the Ukraine area” means absolutely nothing, as far as attribution goes.

1 year ago 101 14 8 0
a photo of a chip overlaid with red and blue wiring in CAD

a photo of a chip overlaid with red and blue wiring in CAD

a jumbled pile of logic gates on a very large schematic. it's totally unreadable.

a jumbled pile of logic gates on a very large schematic. it's totally unreadable.

it took a month, but i've reverse engineered this IBM MCGA gate array chip. 17,000 transistors. 768 gates. over 1200 nets.

1 year ago 281 29 13 1
Post image

Well said!

1 year ago 76236 19139 1224 608
Video

This is Marco Rubio explaining how the USA promised to defend Ukraine forever if they got rid of their nuclear arsenal left after the Soviet Union fell.

This is why lil marco was sinking into the couch. He was hoping we wouldn’t find it…so don’t RT right now this very second.

1 year ago 54111 37033 2032 3067