3D Accelerator

No, and ARM doesn't even has an FPU.
So you can't handle much polygons at a time.
You can try to port OpenGL libraries however

AFAIK, one of Sony handhelds has some GPU onboard

But Palms don't have. If they had, it would be in the specs.
If you want reliable 3D, then you have some problems.
Without acceleration, you need to calculate everything with the CPU. But the CPU lacks an FPU, what is essential to 3D.
All coordinates are stored in floating point vectors, all polygons are in floating point matrixes.
Emulating so much floating point operations is VERY slow.
We have the advantage of a smaller screen however, and a relatively fast CPU.
You can try calculating in fixed point, it would be much faster, but this may rise some errors, since with every calculation you can lose precision.

Yeah the Doom engine (which both Doom 2 and Hexen use) is what some people call a "2.5D engine". Sprites (game objects) are 2D, and so is the map - there's no rooms above other rooms for instance - the map is drawn, from memory by 2d raytracing and then sort of "stretching" the results into the height dimension. Thus Doom doesn't have all the 3d polygons that newer games have to compute. These games originally ran on your old Intel 386SX which itself didn't have floating-point, so they won't have any trouble on an XScale or OMAP.

oh ok....i was reading from the intel site about something called the 2700g i think but i guess it was an add on the the pxa270..like a graphics card

Yeah, seems so. From the product page: "The IntelВ® 2700G multimedia accelerator is a companion chip that, when paired with the IntelВ® PXA27x processor family, delivers hardware-accelerated video and graphics for handheld devices."

so can you make Doom for palm!!!???

ty johnson wrote:

so can you make Doom for palm!!!???

http://kedar.palmlinux.cz/linux2ram/prboom.squashfs - yes, you can

edit: http://www.metaviewsoft.de/en/Software/PalmOS/Freeware/ZDoomZ/ - thats the palm os version