9 Jan
2013
9 Jan
'13
9:14 p.m.
On 09/01/13 11:47 PM, David Riley wrote:
On Jan 9, 2013, at 10:44 PM, Toby Thain wrote:
Well. EVERYTHING in software. Texture mapping, sprites,
polygon setup, geometry transforms, blitting (or, generally,
page-swapping). ...
I had forgotten it ran on an '040. We played it to death. :)
--Toby
What does
DOOM need, CPU power of graphics?
Texture mapping in software, so: CPU, since there is a bunch of stuff done per pixel, and
there are quite a lot of pixels. Then you need a framebuffer to render the pixels. Unless you had an SGI, this stuff really
didn't get exciting until RISC and PowerPC (Marathon, Halo 1...) and then hardware 3D,
which soon enough made it to the PC world.
Marathon was written for both 68K and PowerPC, and actually
performed pretty OK on a 25 MHz 68040. ... ran OK on a 386 and pretty damn well on a 486, neither
of
which was RISC in any sense. ...
- Dave