Inklings: a tumblelog

Inside the HP Nanoprocessor: a high-speed processor that can't even add

An odd bit of hardware I’d never heard of. It was contemporary of the 8008 and 6800, but had some very quirky design features that allowed it to be manufactured at a fraction of the cost. It’s use at the time seems to have mainly been in embedded systems and special purpose hardware.

How to be miserable for the rest of your life

HOME - Resonance

Wyspa - Piotr Kuciapski

So, this is stupidly good!

Seeeduino XIAO

Interesting Arduino-like board. Particularly nice is that it has a USB3 port, and is about the size of a postage stamp.

Cigarettes After Sex - Nothing's Gonna Hurt You Baby

Protect domains that don’t send email

While I’ve been setting up SPF records like this, it’s never occurred to me that domains with an appropriate SPF record might also need DMARC and DKIM records to go along with it. I’ll be setting that up.

C64 Saver 2

The C64 Saver 2 is an open-source project intended to make overvoltage protection available and easy to make for anyone interested in using the old Commodore power brick together with the C64. The power brick is 20-30 years old and it is known for failure with overvoltage. This is caused sometimes because of broken solder joints on the regulator or the regulator itself failing.

I’ve pretty much always had an aftermarket brick for my C64, as the original died a few years after I got my original. I don’t think I should trust the almost three decade old replacement brick, so if I power up my C64 again, I’d like to build something like this to put in line between it and the brick.


Pikchr (pronounced “picture”) is a PIC-like markup language for diagrams in technical documentation. Pikchr is designed to be embedded in fenced code blocks of Markdown or similar mechanisms of other documentation markup languages.

Handles are the better pointers

Minotaur Shock - Ocean Swell

Minotaur Shock - Luck Shield

The song really kicks off properly at around 1m in.

You don't need more than one cursor in Vim

Petri Nets Are Monoids

Event-Driven Architecture

Linux containers in 500 lines of code

I'm not feeling the async pressure

Strategies for Working with Message Queues

A Thought Experiment: Using the ECS Pattern Outside of Game Engines

Backpressure explained — the resisted flow of data through software

I test in prod

Testing in production is a superpower. It’s our inability to acknowledge it that’s the trouble.

TDEE Calculator

Exploring x509 by creating a toy PKI

How to pick more beautiful colors for your data visualizations

RISC OS ROMs for RiscPC/A7000

I’m slightly surprised the A7000 is still supported!

Risc PC, A7000 and A7000+ CMOS rechargeable battery replacement

I have an Acorn A7000 to fix. The CMOS battery has leaked horribly and, even if it hadn’t, it needs to be replaced.

The Sound of 1-bit: Technical Constraint and Musical Creativity on the 48k Sinclair ZX Spectrum

Tim Follin - “Chronos" (ZX Spectrum 48k)

That’s being played through a piezoelectric buzzer that’s being rapidly flipped on and off to do pulse width modulation. But that’s not the clever bit: the clever bit is how the different tracks are being mixed together.

Commodore 64 switched PSU

I haven’t turned mine on in years, and the stories I’ve heard of it frying people’s machines gives me pause. This is meant to be a very good replacement though, and not too bad pricewise.

Lusine - Just A Cloud

Blanck Mass - Dead Format

That bass line’s a chonky boi!

Twitter launches new API as it tries to make amends with third-party developers

I don’t use Twitter anymore, aside from the odd semi-automated tweet, but if I were, I still wouldn’t trust them not to screw this up again.

Bret Victor: The Future of Programming

Tarsnap key rotation with tarsnap-recrypt and tarsnap-keyregen

The Story of ARP Instruments

Loopy: a tool for thinking in systems

CP/M archives

I would like use my Spectrum Next to mess around with CP/M at some point, playing with some classic software from back then. I have a few things to figure out before that—which might end up in a blog post—but there are lot of interesting things in that archive.

I’d never heard of LBR archives before, but I hunted down a file format specification for it.

Small Mailserver Best Current Practices

I already do most of these. I’ve yet to set up MTA-STS though, and there are a few other bits and pieces I could tighten up. Well worth a look, however, if you’re running your own mailserver.

Awesome Cold Showers

For when people get too hyped up about things.

The Mother of All Demos, presented by Douglas Engelbart (1968)