harold - Network

Turns out that random Pi Picos from aliexpress may or may not have different pinouts from the standard one. Not a disaster, but be careful...

Turns out that random Pi Picos from aliexpress may or may not have different pinouts from the standard one. Not a disaster, but be careful out there. Bad news if you designed a PCB where a pico is supposed to plug into. I'll let you guess why I'm posting this now.

nl pol and us pol, but only joking"Did I say that? I can’t believe I said that"Ah ja, je hebt er zeker geen actieve herinnering...

nl pol and us pol, but only joking

"Did I say that? I can’t believe I said that"

Ah ja, je hebt er zeker geen actieve herinnering aan, dat komt vaker voor

Ah FreeCAD

Ah FreeCAD

From "JEP 488: Primitive Types in Patterns, instanceof, and switch (Second Preview)", a good JEP by the way, but I find this...

From "JEP 488: Primitive Types in Patterns, instanceof, and switch (Second Preview)", a good JEP by the way, but I find this quoted text mysterious.

At least 90% of casts of int to byte don't have or need a range check, since usually the int is already in range by design (and that range may be 0..255, byte being signed is irrelevant in this direction) or we're explicitly taking the bottom 8 bits of the int.

ST7567 (LCD controller) acts weird unless I toggle its reset pin before using it, I can live with that but it's weird. It's not that...

ST7567 (LCD controller) acts weird unless I toggle its reset pin before using it, I can live with that but it's weird. It's not that it boots up with random garbage on the screen, which may have made sense. Extra stripes appear, but they're visible under different viewing angles than normal pixels and have a different contrast. Where the stripes appear depends somewhat on the actual contents of the screen.

Well that didn't last long, Clang has also given up.

Well that didn't last long, Clang has also given up.

Thanks for this, GCC.

Thanks for this, GCC.

Played around with some _addcarryx_u64, being careful to have at most 2 live carries. Out of the Big Three, the only compiler that delivered...

Played around with some _addcarryx_u64, being careful to have at most 2 live carries. Out of the Big Three, the only compiler that delivered a decent result was Clang. The others messed up in such a way that they needed to reify the carry with setcc.

Any better ideas?

Any better ideas?

Installed the BigTreeTech HDMI5 V1.1 touchscreen today, by which I mean I plugged it in and screwed it into place and it Just Works. No...

Installed the BigTreeTech HDMI5 V1.1 touchscreen today, by which I mean I plugged it in and screwed it into place and it Just Works. No nonsense, I didn't even need to configure it.

The first Python was Anaconda, maybe that's why it didn't work, I replaced it with "normal" Python(I expect that something...

The first Python was Anaconda, maybe that's why it didn't work, I replaced it with "normal" Python

(I expect that something else is broken now but I haven't encountered that problem yet)

The Raspberry Pi Pico extension for VS Code uses Python. That's fine, and I have Python installed, let's go -Nope. Cannot find...

The Raspberry Pi Pico extension for VS Code uses Python. That's fine, and I have Python installed, let's go -

Nope. Cannot find python.

It's literally right there, I can run a bare `python` on the command line without spelling out the full path, what more do you want.

Nope. Cannot find python.

So I uninstalled Python, downloaded Python, and installed Python (could have tried installing Python over the existing Python, but that's asking for a different kind of trouble).

All good now..

Looks like the Steinhaus–Johnson–Trotter algorithm does this

Looks like the Steinhaus–Johnson–Trotter algorithm does this

Is there something similar to std::next_permutation but with the sequence of permutations ordered so that the sign of the permutation...

Is there something similar to std::next_permutation but with the sequence of permutations ordered so that the sign of the permutation alternates?

nonsenseI really care about my health, which is why today's episode is sponsored by: Pure Granulated Sugar.Pure Granulated Sugar is free...

nonsense

I really care about my health, which is why today's episode is sponsored by: Pure Granulated Sugar.

Pure Granulated Sugar is free from any of those shady additives and contains only a single ingredient: sugar. This pure unpolluted chemical is extracted from a plant so you *know* it can't be bad for you.

Buy Pure Granulated Sugar now for 10% off using my code, sweetharold25

If you're one of the people who hold that you can only rely on behaviour that is "promised" by a specification, you also have...

If you're one of the people who hold that you can only rely on behaviour that is "promised" by a specification, you also have to accept that you cannot use any software, because it's standard to disclaim "fitness for a particular purpose". Whatever you're trying to use the software for, its license explicitly does not claim that the software is useful for that. Any time that software does what you wanted it to do, it's a random accident that you cannot rely on.

Would be cool if the Arm ISA docs also mentioned the corresponding* intrinsics in the lemmas of applicable instructionsIt's fairly...

Would be cool if the Arm ISA docs also mentioned the corresponding* intrinsics in the lemmas of applicable instructions

It's fairly predictable from the instruction name, but not completely.

Is "new projects should use memory-safe languages" a too high bar for you? Here let me lower it a bit: new projects should use...

Is "new projects should use memory-safe languages" a too high bar for you? Here let me lower it a bit: new projects should use languages at least as safe as raw assembly.

C and C++ don't even clear *that* bar.

A bunch of integer operation that used to have a latency of 3 cycles (popcnt, lzcnt, bsr) take 4 cycles on LionCove (could all take 1 cycle...

A bunch of integer operation that used to have a latency of 3 cycles (popcnt, lzcnt, bsr) take 4 cycles on LionCove (could all take 1 cycle but whatever), not a huge deal but maybe some code wants to be reshuffled a bit. The latency of SIMD integer multiplication went down, nice.

With Windows 10 about to EOL, my mother wants some other OS on her "TV" (actually a NUC running Windows 10, official smart TVs are...

With Windows 10 about to EOL, my mother wants some other OS on her "TV" (actually a NUC running Windows 10, official smart TVs are ass) sometime this year. It's not compatible with W11, and anyway I don't want to give in to the coercion to """upgrade""" to W11.

So I was thinking, maybe the year of the Linux desktop has come at last. Is there any distro that I can put on there and have it Just Work without needing me to be tech support for my mom?