Pat Mackinlay writes:
> >>* Video controller: I'm still for a TMS34010-based solution. Here, the
> >Good enough, but still better to use VRAM as frame buffer for TMS and a
> >24-bit RAMDAC.
> I was assuming this. I've since found out a bit more about the 34k.
> Basically, the chip has access to one memory bank. This bank may be either
> DRAM or VRAM, and is used to store both the chip's code and the video
> image. The host has access to all of this memory through an 8 or 16 bit
> "host access port" - so it can essentially "write through" the 34k and into
> the RAM on the other side. I think this would attach to the 3730 quite
> nicely. I'm assuming TI makes a neat little DAC/palette chip intended for
> use with the 34k, and if it's cheap enough, it'll be a neat solution.
The 34010 might be good if it simplifies the design and helps bring
the price down, but I worry over the affect on video performens (and
complexity of the software). One can do quite well with a dumb
frame buffer with high bandwidth. Joel McCormack's article ("Writing
Fast X Servers for Dumb Color Frame Buffers. Software: Practice and
Experience 20(S2):83-108, October 1990) shows this (using a R3000 BTW).
What memory bandwidth can one expect using the 34010 as a dumb frame