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Re: [CLOSED] Bitmine CoinCraft A1 28nm chip distribution / DIY support
by
[gadget]
on 08/05/2014, 01:59:06 UTC
userbase++

If you all can confirm a single chip works, it would further motivate me to finish my schematic in KiCAD (and then work on a PCB layout) for the http://grid.coop/Minetor/ concept. Even if I have to have two chips, that would work, but I would have to run them at something like 400mhz or slower because I have a 30W power budget from power-over-ethernet. The real question about is 100mhz silly is what is the system total Gigahash/watt at that clock speed. If you can get away with some serious undervolting, it might actually make sense.

Also see http://bitspjoule.org/hg/nTekminer/rev/8128400e0aad for a patch that uses /usr/local/bin/gpio (from http://wiringpi.com/download-and-install/ ) for reset. I would rather use mercurial and bitbucket, but I will post a git version if that means someone will use it or it gets merged upstream.

I'm aware of wiringPi, but I'm not sure this approach is that much different from what I am currently doing. It is a separate binary that runs with root privileges, albeit set via setuid rather than an explicit sudo. I do like the idea of executing it through a fork() though.