bunnie

7 ms·

31.
by bunnie 7mo ago
The chip comes from the factory with a boot0/boot1 chain that is fully reproducible and buildable from source. Developers can replace boot1 with their own version, where you could add the feature you're thinking about.
32.
by bunnie 7mo ago
Rule of thumb is that a processed wafer from 28nm and older is around $3k/wafer and the cost goes up kind of exponentially towards the smaller nodes. Also, in general, the fab wants you to order a "FOUP" of wafers at a time -
33.
by bunnie 7mo ago
I'm actually working on a comprehensive write up on exactly this topic that should be out sometime next week!
34.
by bunnie 7mo ago
The Baochip is packaged in a form of package that is inspectable using IRIS. [1] It does not give perfect verification but it's the best I can offer until we have more open PDKs. [1] https://bunnie.org/iris
35.
by bunnie 7mo ago
The masks alone are single digit millions, but with all the design tools and staff costs typically tens of millions is the benchmark number for a tape out in this node. After coming out of the fab, the chips go through probing, packaging an
36.
by bunnie 7mo ago
Personally, I love eating "bao" (a style of dumplings), but also coincidentally, a homophone of "bao" in Chinese (different character 保, similar sound) has a meaning of "protect; defend. keep; maintain; preserve. gu
37.
by bunnie 7mo ago
Yes, 1x Vexriscv RV32-IMAC + MMU, and 4x PicoRV32's as RV32E-MC for I/O processing, configured with extensions to enable deterministic, real-time bit-banging without having to count clocks.
38.
by bunnie 7mo ago
Hello wonderful people! I'm bunnie - just noticed this is on HN. Unfortunately due to timezones I'm about to afk for a bit. I'll check back when I can, and try to answer questions that accumulate here.
39.
by bunnie 8mo ago
$650bb / ($34.72 * 12 months) = 1.56 billion users. That's far larger than the population of the USA (unclear to me if that 650bb number is global or USA only) but by sheer scale this is assuming that these companies can collect t
40.
by bunnie 9mo ago
That's correct.
41.
by bunnie 9mo ago
Hmm, I think I see what you're asking. I'm not sure if this exactly answers your question, but at least for aliasing, because we have virtual memory all pages have to be white-listed to be valid. Thus "natural" aliases (
42.
by bunnie 9mo ago
Can't comment on Redox as I'm not familiar with it (maybe xobs is), but "for embedded devices" means design choices are made to accommodate smaller memory footprints - hundred k's of RAM, ROM; not the gigabytes expe
43.
by bunnie 9mo ago
Thanks to a PR from a community member (millette) there's now a PDF: https://betrusted.io/xous-book/pdf/xous-book.pdf
44.
by bunnie 9mo ago
It is true that hardware, by definition, is a big ball of globally mutable state with no guarantees about concurrency, data types, or anything else. However, one could take the view that it's the role of the OS to restrict & refine
45.
by bunnie 9mo ago
I am a maintainer. I think what you're referring to is the problem where `std` is actually a veneer on C - so for example, when Rust allocates memory on an x86-class desktop, it actually invokes a C library (jemalloc, or whatever the O
46.
by bunnie 11mo ago
I can't upvote this hard enough. It's nice to know there's at least one other person who feels this way out there. Also, this is the most compelling reason I've seen so far to pay a subscription. For any business that me
47.
by bunnie 1y ago
Maybe building a case to send military assets into New York? Breaking up an alleged international spy ring threatening diplomatic meetings could be grounds to deploy types of forces not normally allowed otherwise...
48.
by bunnie 1y ago
VGA connectors used the same shell as the DE-9 but had three rows for a total of 15 pins.
49.
by bunnie 1y ago
Fair enough, that was not the best example. But I'd also observe that since business owners have to capitalize the wages of the machine operators producing injection molds, then there is an advantage to outsource the whole operation. C
50.
by bunnie 1y ago
I keep seeing an objection in this thread along the lines of "what make software so special that it deserves a tax deduction". Correct me if I'm wrong, but if a company hires someone to say, mine coal or brew beer, the expens
51.
by bunnie 1y ago
The comparison with Jim Beam is misplaced. Both TSMC and Jim Beam already have to amortize their production equipment over several years. I'm not arguing that this should be changed. This is because the primary risk taken in a distille
52.
by bunnie 1y ago
^^ this
53.
by bunnie 1y ago
You are correct. I picked this example under the general assumption that the Windows driver would be closed-source, but you are correct that it doesn't necessarily have to be closed source. The problem goes with the license, not with t
54.
by bunnie 1y ago
Work-for-hire open source contributions often already bear a copyright holder of the entity paying for the work. The problem isn't who is the copyright holder. The problem is that the license assigned says that anyone is free to use
55.
by bunnie 1y ago
It's pretty bad. It had a huge impact on my personally, I'm a small R&D shop and basically I have had to end all risky long-term research projects. In addition to the research costs, I'd also have to pay taxes on the rese
56.
by bunnie 1y ago
I share your sentiments. Makes testing my builds against windows, Ubuntu 22, Ubuntu 24, etc a breeze. It pretty much 'just works' and I can take it to go on my laptop. Even though I do most my work in Linux, Windows is a convenien
57.
by bunnie 1y ago
I got a tour of Prof. Bose's factory as a student while taking his course on acoustics. Active suspension is basically a speaker voice coil but scaled up and pushing a car wheel instead of a cone. A lot of the physics and perhaps more
58.
by bunnie 1y ago
I feel bad for the Signal devs. If they weren't personally targets for state level actors before, they are now. Say what you want about the usability of DoD home grown solutions, but it was a military system backed up by military budge
59.
by bunnie 2y ago
I'd hypothesize this is an artifact of the evolution of human language, which started first as a mechanism to communicate feelings and tribal gossip, and only much later on found utility as a conveyance for logic and reason. In a funda
60.
by bunnie 2y ago
"let them eat cake"

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