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Comment: Re:Typical redditor (Score 4, Informative) 137

by NP-Incomplete (#28935659) Attached to: Intel Confirms Data Corruption Bug, Halts New SSDs
On a chip, adding 2^256-1 and 1 may not equal 2^256 when:
  1. Your destination register is 256 bits.
  2. Your destination register is in a different clock domain.
  3. Your timing constraints are wrong.
  4. Your power grid cannot support switching 256 registers.

Functional simulations will only catch #1.

Comment: Here you go (Score 1) 185

by NP-Incomplete (#28693441) Attached to: Suggestions For Learning FPGA Development At Home?
List of FPGA prototyping boards. Xilinx software is free for certain FPGAs. http://www.fpga-faq.com/FPGA_Boards.shtml For books, the only one I know of with an emphasis on synthesis results that includes both VHDL and Verilog is "HDL Chip Design" by Douglas J. Smith. I highly recommend Verilog over VHDL even though I learned VHDL first. Also Xilinx has obscene amounts of documentation on their websitehttp://www.xilinx.com/support/documentation/. Some of their whitepapers and app notes cover general logic design techniques.

Comment: Re:If you know anything about statistics... (Score 2, Informative) 512

by NP-Incomplete (#28355897) Attached to: Statistical Suspicions In Iran's Election

...you know that a small random sample of the population tells you what the general population is like to a very high degree of certainty.

Statistics allows you to extrapolate results from a small sample set if, and only if, the the entire sample set follows a known statistical model.

Comment: Re:Unintended consequences (Score 1) 717

by NP-Incomplete (#28343523) Attached to: Broke Counties Turn Failing Roads To Gravel

There is no such thing as a right to the market value of one's property--which only exists in the minds of others to begin with.

I wish housing values weren't guaranteed either. Unfortunately the federal government has recently passed some extremely large spending programs designed specifically to do just that.

Comment: Re:Crystal radio (Score 1) 246

by NP-Incomplete (#28287805) Attached to: Nokia Developed Wireless Power-Harvesting Phones
This is true. However in this use case the energy radiates mostly cylindrically so to deprive other users of the signal the power receiver would have to be in directly between the transmitter and the signal receiver. Boats deal with this all the time when large freighters block everything(radio, radar, GPS). Most electromagnetic radiation is lost as heat anyway.

Nothing will ever be attempted if all possible objections must be first overcome. -- Dr. Johnson

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