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

[John Watlington]

On Mar 7, 2010, at 10:24 PM, Tiago Marques wrote:

> 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?

Read the next paragraph I wrote:

>> 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

CN19 in that document is the PCIe pinout.

http://wiki.laptop.org/go/Image:XO_1.5_C1_Annotated_Motherboard.png
shows the miniPCIe connector, with a WLAN card attached.

Cheers,
wad