bri3d

19 ms·

301.
by bri3d 10mo ago
I mean, sure, but to what end does that madness lead? Who backs up the backups? Usually this is to allow different departments / divisions / customers (in the case of an OEM model) to all sign code or encrypt binaries, although th
302.
by bri3d 10mo ago
This is the same hardware as a PC, but TPM and UEFI “Secure Boot” happen way, way later in the boot process and aren’t present here; this is the hardware root of trust, in this case the AMD PSP boot firmware, which runs on an ARM system alo
303.
by bri3d 10mo ago
In this case, by using fault injection to induce a glitch into a test mode which bypasses secure boot and loads code from SPI, combined with a SPI emulator (and I2C to send the boot vectors). https://m.youtube.com/watch?v=cV
304.
by bri3d 10mo ago
I have seen some manufacturers enroll multiple manufacturer keys, probably with this notion, but this isn’t useful against almost any threat model. If keys are recovered using some form of low level hardware attack, as was almost surely the
305.
by bri3d 10mo ago
You are both correct and the article discusses it accurately: > Then you have 2048 bytes of user data, scrambled for the reasons mentioned before. The best way to look at the sector as a whole is to think of each sector as 12 “rows” cons
306.
by bri3d 10mo ago
At a practical level I think a thesis that "good" process isolation systems (aka, not hosted on Linux) build on years of development that unikernels will struggle to replace holds true. At a conceptual level I really disagree with
307.
by bri3d 10mo ago
There are lots of examples on YouTube, this one seems succinct: https://youtube.com/shorts/3Eb315vL9uw . They picked good tones to make it satisfying IMO. I don’t know of anyone who’s reversed the bitstream in public,
308.
by bri3d 10mo ago
LG appliances at least used to use acoustic signaling for diagnostics: hold a phone up and the washer makes some modem-esque (I think it’s 4-tone / 4-FSK) noises and the app or technician can diagnose issues. It was originally engineer
309.
by bri3d 10mo ago
The reasons aren’t exactly unknown, considering that the sensor is diagonally oriented also? Processing these does seem like more fun though.
310.
by bri3d 10mo ago
It's the shape of the delivered artifact that's driven the way things are implemented in the ecosystem, not a really fundamental architecture difference. The shape of historically delivered ARM artifacts has been embedded devices.
311.
by bri3d 10mo ago
Yes, exactly this. I don’t feel that I misattributed anything, but if I had to expound on the idea this is exactly how I would explain it.
312.
by bri3d 10mo ago
It's an interesting debate. The flip side of this coin is getting hires who are more interested in the language or approach than the problem space and tend to either burn out, actively dislike the work at hand, or create problems that
313.
by bri3d 10mo ago
They do have a loophole; they import them as kits and “build” them at a Magna facility in Arizona (similar to how early Sprinter vans were re-assembled in the US and sold as Freightliners). But, they are FMVSS compliant (besides steering wh
314.
by bri3d 10mo ago
Exactly. The only way this makes sense to me is if the board needed this product in <1 cycle. Which makes no sense for a market player like NV who already have the PDK, volume, and literally everything else in the universe. But here it i
315.
by bri3d 10mo ago
The only thing I can think of here is that OpenAI’s DRAM land grab is going to stack on a non-NV target and NV need to hedge with an SRAM design that’s on the market NOW. Otherwise, I can’t see how NV couldn’t eat Groq’s lunch in one develo
316.
by bri3d 10mo ago
The bottleneck in training and inference isn’t matmul, and once a chip isn’t a kindergarten toy you don’t go from FPGA to tape out by clicking a button. For local memory he’s going to have to learn to either stack DRAM (not “3000 lines of v
317.
by bri3d 10mo ago
Proxying from the "hot" domain (with user credentials) to a third party service is always going to be an awful idea. Why not just CNAME Mintlify to dev-docs.discord.com or something? This is also why an `app.` or even better `tena
318.
by bri3d 10mo ago
This isn’t likely to be a good indicator. Essentially only the network permission and any fingerprint is necessary for the tracking in this accusation; the idea is not that TikTok were spying on Grindr on the device, but that a device finge
319.
by bri3d 10mo ago
> Nobody forces you to use a real Unix timestamp. Besides the UUIDv7 specification, that is? Otherwise you have some arbitrary kind of UUID. > I would not count on the first 48 bits being a "real" timestamp. I agree; this is
320.
by bri3d 10mo ago
> You're not going to try and extract a timestamp from a uuid. What? The first 48 bits of an UUID7 are a UNIX timestamp. Whether or not this is a meaningful problem or a benefit to any particular use of UUIDs requires thinking about
321.
by bri3d 10mo ago
If you absolutely need it, use a separate uC / “trigger” chip for PD negotiation.
322.
by bri3d 10mo ago
Yeah, I've often thought about what I'd do instead and there's no legitimate alternative. It might help developers feel better if they had some kind of "friendly name" functionality (ie - if registrations in the Reg
323.
by bri3d 10mo ago
> COM is basically just reference counting and interfaces. > I remember a few years back hearing hate about COM and I didn't feel like they understood what it was. Even in "core" COM there's also marshaling, the wh
324.
by bri3d 10mo ago
This is quite interesting: it's easy to blame the use of LLM to find the interface, but really this is a matter of needing to understand the COM calling conventions in order to interact with it. I found the interface and a C++ sample i
325.
by bri3d 10mo ago
IMO the value of COTS software stack compatibility is becoming overstated: academics, small research groups, hobbyists, and some enterprises will rely on commodity software stacks working well out of the box, but large pure/"front
326.
by bri3d 10mo ago
VLIW works for workloads where the compiler can somewhat accurately predict what will be resident in cache. It’s used everywhere in DSP, was common in GPU for awhile, and is present in lots of niche accelerators. It’s a dead end for situati
327.
by bri3d 10mo ago
https://web.archive.org/web/20111219004314/http://journal.th... (referenced, at least tangentially, in the video) is a piece from the engineering lead which does a great job discussing Why C++. The short
328.
by bri3d 10mo ago
https://web.archive.org/web/20111219004314/http://journal.th... A large segment in this article (which is great overall) focuses on this decision. The short summary is "hiring Ada developers was har
329.
by bri3d 11mo ago
My understanding is that Tesla 16V LV batteries have a similar crash lockout in the BMS that also requires workarounds to reset: https://openinverter.org/wiki/Tesla_16v_li-ion_battery
330.
by bri3d 11mo ago
Manufacturer locked crash resets for BMS are a common theme amongst EVs, especially European ones. Exclusive to neither this model year nor BMW, although some other makes have less arcane procedures than the ISTA one.

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