zerohp

7 ms·

1.
by zerohp 1mo ago
CPU designers have been aware of this attack vector for a while, so many (maybe all) have controls to lock these registers. They are written and locked by vendor firmware before it hands off to the operating system. You would have first bre
2.
by zerohp 2mo ago
Questionable behavior from YC companies is nothing new.
3.
by zerohp 3mo ago
Apple Card already offers credit limits high enough for it
4.
by zerohp 3mo ago
That’s exactly what this is. 9 months to production is completely impossible anyway. 9 months from design to early samples is probably impossible given than TSMC takes 3 months after tape out to produce them. Then it’s up to the customer to
5.
by zerohp 3mo ago
The Buddha lived before writing in India. We have plenty of other stories that were passed by oral tradition before they were written down.
6.
by zerohp 4mo ago
The time from tapeout to first samples is 3-4 months even for the biggest customers of TSMC. Shorter for a metal only change.
7.
by zerohp 8mo ago
In the chip design world, 2:1 for design verification to design is on the low end of normal. Some organizations have gone as low as 1:1 but that is considered an emergency that must be fixed. It’s so important that designers will be intenti
8.
by zerohp 8mo ago
The joke is that AI companies pretend to care about doing legal things.
9.
by zerohp 1y ago
* * *
10.
by zerohp 1y ago
My solution is that I no longer contribute to the public internet in any meaningful way. No more open source projects. No more contributions to free software. Bug reports only when it helps me. The hacker ethos is dead. Selfishness and gree
11.
by zerohp 1y ago
Methodology doesn't support the conclusion. Try using images that it wasn't trained on.
12.
by zerohp 2y ago
I don't know of any CPU that speculates both sides of a branch. I work on a CPU design team. Modern CPUs speculate hundreds of instructions ahead, and with just a dozen branches you can have a few thousand different paths. It makes mor
13.
by zerohp 2y ago
Software table walk performance is bad on modern out of order processors because it has to finish every older instruction in flight and redirect the front end to the exception vector. This can take several hundred cycles. Hardware table wal
14.
by zerohp 2y ago
In AArch64, `BR LR` and `RET` do not perform the same logic when FEAT_BTI (Branch Target Identification) is present.
15.
by zerohp 2y ago
As a professional EE, I know that ARM Cortex-M4 is not a chip. It's an embedded processor that is put into an SOC (which is a chip), such as the STM32-family from ST.
16.
by zerohp 3y ago
More cooks can't make one meal better but more cooks can make dozens of different meals and you can choose the best result.
17.
by zerohp 3y ago
John Carmack had some things to say about it: https://www.forbes.com/sites/paultassi/2022/12/17/john-carma... EDIT: direct link https://www.facebook.com/permalink.php?story_fbid=pfbi
18.
by zerohp 3y ago
How is your wifi network? Have you tried changing the display resolution on the Mac while you're connected to the Vision Pro? The virtual display doesn't look as good as the laptop screen, but it looks as good or better than the 1
19.
by zerohp 3y ago
You can read the theory of operation for generating negative voltage in this application note from Analog Devices: https://www.analog.com/en/resources/design-notes/generating-...
20.
by zerohp 3y ago
Compare phones to game consoles.
21.
by zerohp 3y ago
Can you make a compelling argument? Just saying it’s wrong is not an argument. If employers don’t like it then they should pay by the hour for 24 hours a day, 7 days a week.
22.
by zerohp 3y ago
Having multiple threads does not mean that they are all doing equally useful work. Single threaded performance is absolutely critical for a desktop machine. Even in multithreaded desktop applications, it's rare to see them effectively
23.
by zerohp 3y ago
100% of the CPU design team at Samsung in Austin was laid off in 2019. That's why none of the authors in this 2020 paper have a Samsung email address.
24.
by zerohp 3y ago
> The most impactful technology company in the history of humanity. This statement ignores a lot of history. Apple has certainly done great work but it's hard to compare it to General Electric, or even AT&T. Without General Elec
25.
by zerohp 3y ago
Why does anyone need a SAAS product for this?
26.
by zerohp 3y ago
> However, the details of modern branch predictors are proprietary, so we don’t have authoritative sources on them. I focused on Computer Architecture for a masters degree and now I work on a CPU design team. While I cannot say what we u
27.
by zerohp 3y ago
I’ve tested it. Interrupt to pin latency on ESP32 is more than 1 us so none of those solutions work if you need it to respond in <1 us.
28.
by zerohp 3y ago
Completely agree. I didn't even start my bachelor's degree until 36 years old.
29.
by zerohp 3y ago
Three companies have wall gardens for game consoles and nobody cares about that. Those three companies own the entire console market. There's no alternative. Why doesn't the EU do something about that? Why is Apple an exception?
30.
by zerohp 3y ago
> And once "computer says no" you'll have a hell of a time trying to fight it. Cars have been equipped with event data recorders that capture information moments before the crash for at least 20 years. It is part of the ai

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