XO-1.5 B3

Tiago Marques tiagomnm at gmail.com
Sat Nov 14 17:51:26 EST 2009

Hi John,

On Sat, Nov 14, 2009 at 3:18 PM, John Watlington <wad at laptop.org> wrote:
> We received 15 XO-1.5 B3 motherboards Friday, straight from the
> assembly line.
> Five of them have been packaged in CL1A cases for 1CC developers, and
> another
> 5 are running tests on the sawzall testbed (outside the tech room).
> There are several changes from B2:
> - change in SDIO slot assignment to move the WLAN to one with working
> suspend operation
> - power to the internal SD card (slot 3) is now controlled by the EC
> - DCONIRQ routed to an usable interrupt input
> - A second interrupt from the EC to the host is provided, to work
> around ACPI complexities.
> - change in power distribution to handle theoretical overload of
> 3VPCU circuit
> - use of QMI WLAN module (instead of AzureWave).   The WLAN card > now

The WLAN card in B2 seems to have a better signal than on in the XO-1,
do you expect any changes with this new card?

> uses
>   +1.8V from the motherboard, instead of linear regulators (from 3.3V).
>   This is a different pinout than the AzureWave as well.   Modules
> should be
>    available 11/18 or so.
> - All have only 512 MB (four memory chips).   Due to DRAM prices
> right now, we
>   will offer this to some customers and need to test it more
> extensively.

That is unfortunate, the machine works really nice with 1GiB. Hope you
can keep it for deployments.

Best regards,
Tiago Marques

> Eight of these are running SD tests right now, waiting to test
> suspend/resume.
> Two are in the hands of Paul and Chris.   One will be come a new
> tinderbox next
> week, and the remainder will be put in cases after we finalize the
> Information is up at:  http://wiki.laptop.org/go/XO_1.5_B3
> Cheers,
> wad
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