Took me too long to come back to this thread, sorry. I see it was already addressed. I was going to add:
Kolgar:
MBX is a mobile/emdedded graphics accelerator architecture from Imagination Technologies' PowerVR division. It's been implemented into chips sustaining 6M-tri/sec and 450M-750M-pix/sec variable effective fillrates.
PowerVR processes graphics by first compiling and interpreting all of the scene's data into information lists made for tiles of screen area which are small enough to fit inside the core's memory, all before actually rendering the graphics. Because processing on these lists can then take place within the core, less expensive RAM requirements and a more cost-effective architecture are possible from the lower demands for external accessing, power consumption is lower from less external accessing, blending and depth sorting occur at the high internal precision without sacrifice to external framebuffer depth, extra sampling for anti-aliasing can be taken without more external framebuffer memory requirements, locality of data can make operation more efficient, and the visible parts of the image can be quickly identified and isolated for rendering to save from doing a lot of extra work.
MBX is programmable at a DirectX 8.1 level for vertex shading and supports skinning, curved surfaces with fractional tesselation and depth adaptation, high resolutions, full-scene anti-aliasing as a standard option, anisotropic filtering, and DOT3. For a comparatively clocked MBX system, see Sega Sammy's Aurora.
If not, then perhaps this goes to my other point, which is that few companies are able to successfully bring to market a high-performance, mass-market portable like PSP - and garner enough support for it to make it relevant.
No argument there. There are only three major players in the dedicated gaming console market. Sony is also distinguished as an end-to-end product company, having the infrastructure to design some of their own IP and having the market to then justify manufacturing the end-products for it.
With so few competitors in the dedicated gaming hardware sector, though, the range of product is not very representative of the breadth of available technologies. PSP may be the most advanced product of its kind in capability and support, but that has limited relevance to technological sophistication considering its competition is mainly the Game Boys and a few vastly smaller-market gadgets.
Simon F:
MBedded Xcelerator works too. ConsoLe Xcelerator makes sense, but then AMX or ARX would've.