vanjoe

138 karma · joined April 7, 2016

submissions comments

vanjoe··on Counting Down to the New Ampere (2016)

Why is the kilogram the base unit instead of gram?

vanjoe··on Developers who use spaces make more money than those who use tabs

Rubber duck is trying to lead you astray. Use emacs!

vanjoe··on MMIX 2009: A RISC computer for the third millennium (2011)

Is this true? I don't know anything about writing interpreters, but wouldn't function pointers work?

vanjoe··on x86: Approaching 40 and still going strong

Reading the history of fixed width simd is agonizing, every generation trying to fix mistakes. You'd think they'd learn eventually.

vanjoe··on Housing a prisoner in California costs more than a year at Harvard

As long as you allow that society has the right to force people to be locked up without their consent because they broke a law, I don't think it's a stretch to say that society has the right to force people to do work.

vanjoe··on Nasa’s Van Allen Probes Find Human-Made Bubble Shrouding Earth

VLF is not easy to deploy, from Wikipedia : "Transmitting antennas for VLF frequencies are very large wire antennas, up to a mile across. "

vanjoe··on Drone Uses AI and 11,500 Crashes to Learn How to Fly

What determines autonomous flying? Couldn't the drone just hover in the middle of the room and not crash? Would that count? Don't you need some sort of increased score for moving around?

vanjoe··on Long-dormant bacteria and viruses in ice are reviving as climate warms

> kept all of humanity from a tragic end

Humanity would have survived, lots of people would Die, but not everyone

vanjoe··on Shaming Children So Parents Will Pay the School Lunch Bill

What's up with kids buying lunches at school? At my school everyone brought lunches with them. Never had any drama that I can remember.

vanjoe··on Show HN: R8 Processor

I wouldn't say lattice tools are super helpful, I've spent more hours cursing icecube2 than I care to recall.

vanjoe··on AMD Ryzen Machine Crashes on a Sequence of FMA3 Instructions

I don't think this is true. I'm not an expert on application scale CPUs, but I think they actually have ROMs that control state machines that execute the instructions. This is similar to how regular instructions are stored in memory.

vanjoe··on California has the USA’s highest poverty rate, when factoring in cost-of-living

Always comparing,never evaluating against an outside standard. We'll never break the n log(n) barrier

vanjoe··on Emirates Says Bookings to the U.S. Fell by 35% After the First Travel Ban

Is Vancouver really in the class of london and new York? (I've lived my whole life in a Vancouver suburb, and I'm curious how the world views us)

vanjoe··on Chatbot that overturned 160k parking fines now helping refugees claim asylum

I think adding absolutes is not helpful

vanjoe··on ORCA – An implementation of RISC-V intended to target FPGAs

Right, you usually have some idea of how Look up tables an n bit add operation, or an n bit multiplexer etc takes up. You also need to take into account how much memory and multipliers you need since FPGAs have multiplier and ram blocks built in.

vanjoe··on ORCA – An implementation of RISC-V intended to target FPGAs

Yes, it is built to be as lightweight as possible. We have used it with wishbone devices on ICE40 chips, which are about as small as they come

vanjoe··on ORCA – An implementation of RISC-V intended to target FPGAs

The biggest feature change is the addition of interrupt support. Also stability and bug fixes.

vanjoe··on RISC-V Offers Simple, Modular ISA

Yes, that is more or less true, the problem you would run into is communication between cores. When you have lots of cores you run into problems if they all want to talk to the same memories. If they were could all run more or less independently there is no real issues. The reason I list LUT4s, is newer chips have ALMs which is definitely apples to oranges. Also there Cyclone IV chips with much more than 22K LUTs.

vanjoe··on RISC-V Offers Simple, Modular ISA

I'm the principle author, I can answer any questions

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