XO 1.5 B2

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XO-1.5 Laptop Beta test model 2 (B-Test 2), also known as B2.

Description

The B2 prototypes are complete systems, externally appearing very similar to production XO-1s (CL1A). OLPC should receive a couple hundred of these in September, 2009.

Identification

• Hopefully identical to a production XO-1 with the single touchpad (CL1A), but with:
  • green power and screen rotate buttons
  • green battery release buttons
• The motherboard has a daughtercard for the WLAN.
• The motherboard has an internal SD slot

Photographs:

Software Support

XO-1.5 use Q3xxx firmware releases. These will not work on an XO-1.

B2 motherboards require a release equal to or later than Q3A10.

Check the XO 1.5 EC dev changelog for information about the latest EC firmware (integrated into the above OFW releases).

This may be installed by downloading and placing on a USB stick, then:

1. Ensure that you have both a somewhat charged battery and a DC power source
2. Boot the laptop, pressing the escape key ('X' in upper left hand corner of keyboard) within a few seconds after boot to enter Open Firmware.
3. Insert the USB stick containing the new firmware
4. Type:

flash u:\q3a10.rom

Linux

A Linux image for the A1/A2/B1 is available at http://dev.laptop.org/~cjb/f11-1.5/os27/os27.img.gz. You need os27 or later on a B1, as the DCON is not properly supported and the internal SD card WP is not ignored by the kernel in earlier releases.

To install on an XO-1.5's SD drive, you can run:

zcat os27.img.gz > /dev/mmcblk0

Restrictions

The currently known restrictions on usage are:

Serial Port/Camera

The processor serial port situation on XO-1.5 is not optimal. There is a connector located on the upper left hand side of the motherboard for +3.3V RS-232 connection (see the Pinouts and the Connector/Jumper Locations), but its use must be enabled using a jumper (JP1) located next to it.

To use the serial port: - Install a serial enable jumper - Disconnect the camera. This requires removing the motherboard from the case to access the connector.

The jumper is JP1, but the silkscreen on B1 makes it look like JP12 (there is no JP12).

Documentation

Supporting documentation for these boards are (in PDF):

• Pinouts
• Connector Locations
• GPIO Mappings
• EC Pinout
• EC Power On Sequence
• Power Distribution Diagram

Followed by

• C1

Preceded by

• B1