Re: [Arm-netbook] Improv And Operation:Marketing for EMOA-*

Hello,

On Sat, 24 May 2014 19:49:17 -0400 Derek LaHousse dlahouss@mtu.edu wrote:

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As I understand it (and I could be wrong, please educate me), the USB bus generally has to go through CPU, while SATA can often be driven with DMA.

This is ridiculous, any bus can be driven by DMA, and how well that works depends on particular controller (and driver) implementation, not on a bus.

I believe the RasPi currently has this problem with its USB busses.

That's probably because Raspberry Pi is made of botched hosed hardware and software, and good people warned on staying away from it, because from it, more bad things can be learned, than good (http://whitequark.org/blog/2012/09/25/why-raspberry-pi-is-unsuitable-for-edu... , etc.)

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