jeffbush

9 ms·

31.
by jeffbush 10y ago
While working on mobile phones, I've found a number of problems with the TRS style jack. One is they trap lint internally, which can often result in the internal switch that detects insertion permanently thinking there is a headphone i
32.
by jeffbush 10y ago
Also Verilator ( http://www.veripool.org/wiki/verilator ) supports SystemVerilog, is open source, stable, and FAST. There are also a number of commercial users: https://en.wikipedia.org/wiki/Verilato
33.
by jeffbush 10y ago
Groups of cells are tagged with what is known as a "location area." The phone monitors a list of neighbor cells during its periodic wake ups (around 1-1.5 seconds) and reselects the strongest one. If the phone needs to reselect to
34.
by jeffbush 10y ago
It wakes up around once a second to listen on the paging channel, but it doesn't transmit at that time.
35.
by jeffbush 10y ago
You don't need to set the clock when you turn on the phone because it gets the time from the network when it registers.
36.
by jeffbush 10y ago
I don't mean to call you out, but I'm fairly positive this is wrong. I ran the baseband software team at Apple and worked on the first two generations of iPhones. I'm intimately familiar with that hardware having done reworks
37.
by jeffbush 10y ago
Worth noting that Mythbusters did an experiment with spoofing fingerprint scanners. They didn't use a 3D printer, but etched a copper plate. It looks like the fingerprint reader technology is not the same, but it seems like the ballist
38.
by jeffbush 10y ago
I haven't been back in seven years. Relatives usually come out to visit me. I'm too soft now to survive a winter there. :)
39.
by jeffbush 10y ago
Yeah, there are millions of people who live in the midwest who obviously disagree with me. :)
40.
by jeffbush 10y ago
I'd note that tech pundits and journalists have been saying for 20 years that many US jobs would move to India and other countries, but offshoring, while common, hasn't really made a dent in the US tech sector. It's interesti
41.
by jeffbush 10y ago
I had to chuckle a little that this mentions Grand Rapids. I grew up there and moved to Silicon Valley 18 years ago. I hated it there: brutal long winters (Google "lake effect"), hot humid summers, mosquitos, and a socially conser
42.
by jeffbush 10y ago
While I've successfully managed distributed teams (and there are a number of companies that do it heavily), working remotely is not a panacea. There is definitely something to be said for face-to-face communications. People miss out on
43.
by jeffbush 10y ago
I don't completely agree that fabbing a chip is "prohibitively expensive and insanely work-intensive." While it's not cheap, lots of university projects fab chips using multi project wafer services. For example, the Rock
44.
by jeffbush 10y ago
If it pops, yeah. :)
45.
by jeffbush 10y ago
Companies don't usually buy early stage companies based on their current revenue (which was a drop in the bucket compared to Google's total revenue), but the long term vision and leadership team. Regardless of what eventually happ
46.
by jeffbush 10y ago
I worked on the iPhone at Apple and sat in many meetings where the product design and electrical engineering leads would almost come to shouting matches over fractions of millimeters. The engineering was fascinating. Everything inside the p
47.
by jeffbush 11y ago
I made a little FPGA LISP machine: https://github.com/jbush001/LispMicrocontroller
48.
by jeffbush 11y ago
(author here) Yeah. One area I'd like to investigate is adding specialized instructions. The existing renderer is not highly optimized.
49.
by jeffbush 11y ago
Technically it already supports OpenCL, as it has an LLVM backend and Clang port. However, it will generate scalar code that doesn't take advantage of the vector unit. To support it properly, it would need extra passes for SPMD vectori
50.
by jeffbush 11y ago
What I meant was that the shader is a pluggable function in this implementation. If you wanted to change the shader function (say add texture or environment mapping) in this implementation, it would be a fairly minor code change that would
51.
by jeffbush 11y ago
From a performance perspective, admittedly. The software 3D renderer it is running is not highly optimized. But it's probably not an apples-to-apples comparison, since this has programmable vertex/pixel shaders that uses floating
52.
by jeffbush 11y ago
I found an interesting and detailed legal analysis of that. It sounds like the answer isn't black and white: http://jolt.law.harvard.edu/articles/pdf/v25/25HarvJLTech131...
53.
by jeffbush 11y ago
I don't think they need to compete with Intel. The numbers I've seen suggests Intel ships around 300-400 Million processors per year[1]. In 2014, 12 Billon (with a B) devices with ARM cores shipped[2]. In 2011, around 500 Million
54.
by jeffbush 11y ago
No worries :) It is an important point that companies incentives are not always aligned with workers and government has a role to play in making sure they are protected.
55.
by jeffbush 11y ago
"us news commentators aren't credible when various Economists and the BLS contradicts them" Jonathan Rothwell is an analyst at the Brookings Institution. The US News article is a summary of a research report he published base
56.
by jeffbush 11y ago
1. Fair enough. I wasn't trying to put words in your mouth, I was speaking more to the general theme of articles and discussions on this topic. Their thesis, as I understood it is: "There is no shortage of tech workers (specifical
57.
by jeffbush 11y ago
Yes, I was part of that class action, I'm very familiar with it. In fact, when my boss went to a competitor, I actually had a conversation with Steve Jobs about it. My impression was that he was more concerned about losing expertise an
58.
by jeffbush 11y ago
Yes, I was at Apple when that happened and remember being told not to approach people from Google. Here's the thing though: Facebook and many other companies here will still hiring. In fact, they were aggressively poaching from Google.
59.
by jeffbush 11y ago
Agreed, I was only responding to the comment about Silicon Valley (which has received a lot of news coverage outside this article)
60.
by jeffbush 11y ago
I respectfully disagree, at least partially, with your statement. I've been a hiring manager for over a decade in Silicon Valley and my experience is that the market is very competitive now. Most candidates I've spoken with are ta

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