@tom_verbeure@mastodon.social

Tom Verbeure @tom_verbeure@mastodon.social · Aug 02, 2026

Replying to @G33KatWork@infosec.exchange

@G33KatWork@infosec.exchange @azonenberg@ioc.exchange VRR is *obviously* very important and the other stuff too, but it seems like a major hole for Wayland not to have some key features. It’s the burden of a potential successor.

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Tom Verbeure @tom_verbeure@mastodon.social · Aug 02, 2026

Replying to @G33KatWork@infosec.exchange

@G33KatWork@infosec.exchange I’m a pedestrian Linux desktop user, just generic Ubuntu, and I have no clue how Wayland is supposed to be useful for me?

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Tom Verbeure @tom_verbeure@mastodon.social · Jul 23, 2026

The flea market TDS7104 booted up the first time I tried, with dim LCD screen, but failed with CMOS battery error the next time. You need to remove 29 screws to access the PC motherboard, but there’s a new battery now. After some Windows 2000 wrangling, the PC system is back to normal. The dim LCD was not because of faded CCFL backlight but because… the Windows gamma and brightness settings were wrong. I need to backup the HD and install an SSD, but the scope is functional again!

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Tom Verbeure @tom_verbeure@mastodon.social · Jul 14, 2026

Replying to @azonenberg@ioc.exchange

@azonenberg@ioc.exchange I don't have any experience with the Vivado ILA (the ISE one was IMO close to unusable), but the Quartus ILA is amazing, with the option to create write strobes that are an AND/OR combination of selected signals, so that you can record slow signals on a fast clock domain.

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Tom Verbeure @tom_verbeure@mastodon.social · Jul 12, 2026

Replying to @tom_verbeure@mastodon.social

@0h00000000@ioc.exchange @craigjb@fosstodon.org From the TI datasheet: "Because the SN65DSI86 is a DSI to eDP bridge, the SN65DSI86 only supports eDP panels which support ASSR (Alternate Scrambler Seed Reset)." So don't expect this chip to work with a regular DP monitor...

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Tom Verbeure @tom_verbeure@mastodon.social · Jul 12, 2026

Replying to @0h00000000@ioc.exchange

@0h00000000@ioc.exchange @craigjb@fosstodon.org I don't know all your constraints, but DP is pain to get right. $6 seems like a no brainer. Note that the TI chip uses eDP, which is not always compatible with regular DP: the PRBS scrambler is initialized with a different value to act like a cheap alternative for DRM.

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Tom Verbeure @tom_verbeure@mastodon.social · May 10, 2026

Replying to @Mariushendrik@aus.social

@Mariushendrik@aus.social @An0n@beige.party I thought so too, but it’s not clear that it is.

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Tom Verbeure @tom_verbeure@mastodon.social · May 09, 2026

Replying to @Mariushendrik@aus.social

@Mariushendrik@aus.social @An0n@beige.party In Belgium, it’s always the left hand.

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Tom Verbeure @tom_verbeure@mastodon.social · May 09, 2026

Replying to @tubetime@mastodon.social

@tubetime@mastodon.social There was another plotter that was twice the size of this one!

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Tom Verbeure @tom_verbeure@mastodon.social · Apr 26, 2026

Replying to @dtl@8bitorbust.info

@dtl@8bitorbust.info @dpiponi@mathstodon.xyz The Science of Sport was a wonderful blog. Here’s their 2013 article about a sub-2 min marathon. https://scienceofsport.blogspot.com/2013/09/the-sub-2-hour-marathon-dont-get-ahead.html?m=1 “This record is not going to be "smashed" by anyone. Anything greater than 20 seconds is a big improvement.” It was smashed by 65 seconds. 😳

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Tom Verbeure @tom_verbeure@mastodon.social · Apr 18, 2026

Replying to @CanLehmann@mastodon.social

@CanLehmann @verijit @cfbolz I’ll check out the PyPy paper. Thanks!

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Tom Verbeure @tom_verbeure@mastodon.social · Apr 18, 2026

Replying to @cfbolz@mastodon.social

@cfbolz @CanLehmann @verijit The speedily is remarkable. I’ve just a general interest in how logic simulators work and I’m wondering how you do it. Do you need to do any special preparation of the Verilog to do it? The Verilog of a CPU is not or doesn’t have to be all that different from other logic.

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Tom Verbeure @tom_verbeure@mastodon.social · Apr 18, 2026

Replying to @CanLehmann@mastodon.social

@CanLehmann @cfbolz @verijit The project page says “Verilog processor simulations”. Does this mean that it is not a generic Verilog simulator?

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Tom Verbeure @tom_verbeure@mastodon.social · Apr 17, 2026

Replying to @GreatBigTable@mastodon.social

@GreatBigTable @Doomed_Daniel @mainec @david_chisnall The latest on curl is that AI slop bug reports have vanished. https://mastodon.social/@bagder/116407367327224765

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Tom Verbeure @tom_verbeure@mastodon.social · Apr 08, 2026

Replying to @BrunoLevy01@fosstodon.org

@BrunoLevy01@fosstodon.org I know nothing about geometry libraries, but I've wondered for a while how geogram differs from something like Open Cascade?

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Tom Verbeure @tom_verbeure@mastodon.social · Mar 29, 2026

Replying to @karotte@chaos.social

@karotte@chaos.social That’s a fun thing to try. I looked through the datasheet of the VGA controller but couldn’t really figure out how they did it. The chip has an input to stream in video, but that data isn’t gen-locked AFAICT. I think it’s a DMA into the controller attached video memory.

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Tom Verbeure @tom_verbeure@mastodon.social · Mar 29, 2026

When first introduced, HP called their scopes “infinium”. Then some dumb marketing guy at Agilent decided that 3 i’s was not enough and renamed them to “infiniium”…

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Tom Verbeure @tom_verbeure@mastodon.social · Mar 29, 2026

Repair of 2 Agilent 54831 Oscilloscopes

https://tomverbeure.github.io/2026/03/28/Repair-of-Two-Agilent-54831-Oscilloscopes.html

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Tom Verbeure @tom_verbeure@mastodon.social · Mar 18, 2026

Replying to @tom_verbeure@mastodon.social

The second scope supports Windows XP instead of Windows 98. Someone hosts a Symantec Ghost image. Takes almost 45 minutes to install, but after that, the scope boots Windows XP.

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Tom Verbeure @tom_verbeure@mastodon.social · Mar 18, 2026

Replying to @tom_verbeure@mastodon.social

Instead of a parallel IDE cable and CompactFlash adapter card, there's this elegant solution of an adapter that plugs straight into the motherboard, no cable required. Works really well! So now there's only 1 flat cable for the CDROM, and the BIOS detects both.

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Tom Verbeure @tom_verbeure@mastodon.social · Mar 16, 2026

Replying to @azonenberg@ioc.exchange

@azonenberg@ioc.exchange Comes off easy enough. And there are no marks on the outside, only the front.

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Tom Verbeure @tom_verbeure@mastodon.social · Mar 16, 2026

Replying to @whitequark@social.treehouse.systems

@whitequark@social.treehouse.systems Yes. How does that even happen? I've destroyed enough oscilloscope probes in my life by rolling over them with a chair, but I has never occurred to me to attack test equipment knobs with... something.

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Tom Verbeure @tom_verbeure@mastodon.social · Mar 16, 2026

Replying to @tom_verbeure@mastodon.social

Previous owner had a cat. There is no other explanation.

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Tom Verbeure @tom_verbeure@mastodon.social · Mar 16, 2026

Onto the second 54813B scope. This one immediately boots up to a BIOS screen. It has 512MB instead of 256MB of memory. But it doesn’t detect a HD.

This makes sense… because when I open it up, it doesn’t have one. It also doesn’t have any of the IDE cables or the special adapter board to connect to the LS120 floppy drive.

I think I’ll simply give up on the LS120 floppy drive, but 2 IDE cables and a compact flash adapter.

That concludes the work for today.

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Tom Verbeure @tom_verbeure@mastodon.social · Mar 06, 2026

Polyphase Channelizers with Frequency Offset - a Bluetooth LE Example

https://tomverbeure.github.io/2026/03/05/Polyphase-Channelizer-with-Offset.html

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Tom Verbeure @tom_verbeure@mastodon.social · Feb 18, 2026

Replying to @datenwolf@chaos.social

@datenwolf@chaos.social @azonenberg@ioc.exchange @whitequark@social.treehouse.systems @M0KHR@mastodon.radio Way too expensive! All I remember is that they were NE2000 compatible but Novell was too expensive as well. We used a single coax cable instead of UTP.

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Tom Verbeure @tom_verbeure@mastodon.social · Feb 18, 2026

Replying to @azonenberg@ioc.exchange

@azonenberg@ioc.exchange @whitequark@social.treehouse.systems @M0KHR@mastodon.radio @datenwolf@chaos.social I don’t think anything will ever match the hype when Doom was first released. There must semiconductor companies out there whose entire existence is due to the spike in demand for network cards.

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Tom Verbeure @tom_verbeure@mastodon.social · Feb 17, 2026

Replying to @M0KHR@mastodon.radio

@M0KHR@mastodon.radio @azonenberg@ioc.exchange @whitequark@social.treehouse.systems @datenwolf@chaos.social I think the 486 66DX2 was the first x86 CPU with the core clock decoupled from the external bus (hence the DX2). At the time, I thought that was cheating…

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Tom Verbeure @tom_verbeure@mastodon.social · Feb 17, 2026

Replying to @azonenberg@ioc.exchange

@azonenberg@ioc.exchange @whitequark@social.treehouse.systems @M0KHR@mastodon.radio @datenwolf@chaos.social The nineties were such an exciting time if you were into computing. Every time a computer magazine dropped in your mailbox, clock speeds had gone up again. (I learned C on an x86 with 640k RAM and a 30MB HD.)

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Tom Verbeure @tom_verbeure@mastodon.social · Feb 17, 2026

The Stunning Efficiency and Beauty of the Polyphase Channelizer

https://tomverbeure.github.io/2026/02/16/Polyphase-Channelizer.html

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Tom Verbeure @tom_verbeure@mastodon.social · Dec 08, 2025

Replying to @tom_verbeure@mastodon.social

After reassembling the unit and connecting all cabling between top and bottom PCBs, the DG535 gets stuck in an endless boot up loop. 🙁 This is while it’s connected to the variac. The overvoltage might have damaged some analog stuff, so figuring this out will be fun… (The fan is way too loud too, but at least that’s easy to fix.)

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Tom Verbeure @tom_verbeure@mastodon.social · Dec 08, 2025

Replying to @ferrix@mastodon.online

@ferrix@mastodon.online Fantastic! I would never have thought of that. 🙂

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Tom Verbeure @tom_verbeure@mastodon.social · Dec 08, 2025

Replying to @ferrix@mastodon.online

@ferrix@mastodon.online We buy these things at the flea market, not because we need them, but because one day we might need them! (I feel incredibly validated right now.)

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Tom Verbeure @tom_verbeure@mastodon.social · Aug 03, 2025

Replying to @azonenberg@ioc.exchange

@azonenberg @kenshirriff Comfort noise?

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