XO 4 A1

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XO-4 Laptop Alpha test model 1, also known as A-test or A1.

Description

The A1 was the first prototype of the XO-4. It was built using the Marvell Armada 610 SoC. (MMP2).

The number of boards built was small, and distribution was limited to hardware testing and OFW and Linux kernel driver development for the touchscreen.

Identification

• Bare circuit board, no case or display
• Metal covered MMP2 packaging
• Rev. A motherboard

Photographs:

File:XO4 A1 mobo top.jpg

Software Support

• The current EC Firmware release is 0.1.08.

• The current OpenFirmware release is Q4A02. These will not work on an XO-1 or XO-1.5. As with XO-1.75, Open Firmware and the EC firmware are separate.

• There is no current Linux image

It is strongly recommended that you have two sources of power (a charged battery and an external power source) when you upgrade your EC or OpenFirmware. Failure to do so may require the use of an SPI programmer to recover your laptop.

From a software point of view, the A1 prototypes are identical to production XO-1.75 laptops.

Restrictions

There are no restrictions.

HDMI Port

An HDMI Port is present on the motherboard, but not in a place where it is accessible when assembled into a laptop.

Documentation

Supporting documentation for these boards (all in PDF):

• Pinouts
• Connector Locations
• GPIO Mappings
• EC Pinout

Please note that production boards will likely have different pin mappings and connector locations.

Followed by

• A2

Preceded by

• XO-1.75