actually YellowDog shipped a kernel build later that would map the 256MB of the GPU to be used as system memory (so 512 MB in total). Whether or not the whole s

actually YellowDog shipped a kernel build later that would map the 256MB of the GPU to be used as system memory (so 512 MB in total). Whether or not the whole system was "usable" depended on your need. Since yellow dog shipped with enlightenment, it was pretty usable. Of course, the whole system was only interesting to people interested in the Cell processor and wanted to code for it.