Re: SVGA cards on PCI and store gathering

[Noam Halevy <noamh@msil.sps.mot.com>]

jrp wrote:

> Um.  Generally the host writes data into the video ram (which could be DRAM,
> VRAM, or other organizations such as RDRAM), then the video card repeatedly
> fetches this to refresh the CRT display.

This raises another question. Since the CPU writes the data to the vram in a series
of single beat cycles, it could make a lot of sense for the host bridge to support
store gathering. We are currently trying to determine whether this not-trivial feature
is worth implementing in our design. Does anyone know if the Pentium Host bridges support it (I
know the PowerPC host bridge - mpc106 does) ?
Also, do you know of any other compelling reason to implement it, other than the graphic cards 
non-burst data profile ?

Best regards,

Noam Halevy 

email: noamh@msil.sps.mot.com
Tel: 972-3-590534

                 MSIL 
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