XO B2

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XO Laptop Beta test model BTest-2, also known as B2.

Approximately 2500 systems were built by Quanta and distributed. These are fully functional machines with CaFE ASICs, and reflect some, but not all of the learning and improvements from testing of BTest-1. Much more information about the BTest-2 systems can be found in the BTest-2 Release Notes.

Identification

BTest-2 laptops are almost identical visually with BTest-1 laptops. An easy way to tell the difference between BTest-1 and BTest-2 is that BTest-1 keyboards have white lettering, and BTest-2 has black lettering.

There are two flavors of B2:

• Beta Test 2-1 (B2-1) systems, which only have 128 MB of memory, have a label under the battery that says B2-TEST-SAMPLE and a label that says B2-#, where # is one to 16.
• Beta Test 2-2 (B2-2) systems, which have 256MB of memory, have a label under the battery that says B2-7-ext.

Software Support

• B2-1 laptops have insufficient RAM for builds after 406. (The automatic firmware upgrade will

cause problems on later builds!)

• firmware tested up to Q2C27 only, do not upgrade beyond this version of firmware unless specific support for model is mentioned, per olpc-devel mail 2007-September/006767.

Restrictions

• electrical system defects, while running Q2D05 firmware, see #1835, #1752, #4476, #4479, #895, #947,
  • no wake on keyboard or touchpad (#895),
  • DCON will glitch on wake (#947),
• video problems due to hardware design flaw, new camera activity will not work, older camera activity will.
• no serial number

Followed by

• B3

Preceeded by

• B1