OLPC hardware: what if there was an SDR modem / chipset?

[Tiago Marques]

Hi Wad,

Been reading some "lost" e-mails, sorry to be bumping this up.

On Tue, Jan 26, 2010 at 10:35 PM, John Watlington <wad at laptop.org> wrote:

>
> On Jan 27, 2010, at 12:17 AM, Luke Kenneth Casson Leighton wrote:
>
> > hi scott, thanks for joining in, here.
> >
> > On Tue, Jan 26, 2010 at 3:01 PM, C. Scott Ananian
> > <cscott at laptop.org> wrote:
> >> Good luck with your SDR dreams.  I think the most you can expect from
> >> OLPC is that, *if* the 10 improbable things you described actually
> >> come to pass, OLPC will someday include a miniPCI slot so that they
> >> can plug in your magic daughtercard.
> >
> >  miniPCI assumes there's a PCI bus.  ARM SoCs don't have PCI (that i
> > know of).  the only SoC x86 chip i've heard about is the 1ghz IEC
> > 100HV from RDC.  but with ARM it'd have to be a mini PCI-e slot with
> > the USB2 option - pins 36 and 34 - but that's been ruled out because
> > john's removed all internal USB paths.  the next gen x86 clone from
> > RDC that they're planning will have full PCI-e.
>
> Actually, I got that miniPCI connector into XO-1.5.   I won't go into
>

You did? I can't find any reference in the XO 1.5 diagrams. Is it already
being used for something?

Best regards,
Tiago


> all
> the tradeoffs.  It suffices to say that when the overall lifetime
> costs of
> 100K laptops are considered, it didn't increase the cost.
>
> But as with most networking cards, the miniPCI is just a form factor.
> Most WiFi/GSM cards on the market electrically use a USB connection.
> On XO-1.5, we use SDIO, but also provide a spare USB port to the miniPCI
> (why not ?)    The form factor is half-length miniPCI, and the pinout
> is documented at: http://wiki.laptop.org/images/0/05/
> XO_1.5_Pinouts_C2.pdf
>
> > thank you for everyone's time, i'll be back again when i have more
> > concrete news.
>
> Great.
>
> Cheers,
> wad
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