[Arm-netbook] EOMA68 In A Intel Card World?

[Luke Kenneth Casson Leighton]

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crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68


On Thu, Jan 12, 2017 at 8:50 AM, Tor, the Marqueteur
<Marqueteur at fineartmarquetry.com> wrote:

> EOMA50 would be better for it, but something like a digital audio player
> might like an OS tailored to understand its buttons, and the card with
> that OS installed on it might be a bit screwy to use for a laptop (or
> phone).  Nevertheless, IIUC, as long as nothing will blow up, and you get
> some semblance of usable output, it's still OK by the standard.

 pretty much.... yyeah.  examples include the passthrough card that i
quickly designed a couple of weeks ago: i connected an STM32F072's SPI
pins to the EOMA68 SDMMC, because it's _barely_ compliant... if you
want 4-pin you can do bit-banging.... which willl be horribly slow on
a 72mhz Cortex M0 especially given that the STM32F072's USB bus is USB
1.1 (11mbit/sec) but that's not a problem as far as the *standard* is
concerned.

 other examples include the (failed, sadly) IC1t which used the
opencores.org vga controller (yes, really!) and the bandwidth was so
limited on the framebuffer "reader" (wishbone bus, 16-bit-wide) that
if you wanted 1366x768 you had to do it as monochrome (!)... but,
again, that's *not* a problem as far as the *standard* is concerned.
in the strictest sense, it can achieve 1366x768 output... just with
only black/white.

 another is the jz4775 which has 2 USB interfaces - one of them is USB
1.1: again, not a problem: it'll work... just.

 so there's lots of flexibility: any one SoC needs to comply with the
absolute bare minimum, so that if people *really want* to pay only $11
for a Card they can, and if they want better they can pay $150 for an
RK3288 with 4GB RAM and 32GB ultra-fast eMMC.

l.