🚀 go-pugleaf

Tom wrote:
> "John Weiss" <jrweiss@invalid.invalid> wrote in message
> news:ggcbih$bf$1@news.motzarella.org...
>> "Tom" <whizzy@earthlink.com> wrote...
>>> Very good points.  Apparently my PC's built in graphics will only support
>>> 4x3 resolution so I going to buy a new PC as I need one anyway.
>> Are you sure?  Make sure your Display tab isn't set to show only
>> resolutions supported by currently connected hardware...
> 
> The following is a list of 32bit resolutions avaible from the built in
> video:
> 800x600
> 1024x768
> 1152x864
> 1280x768
> 1280x1024
> 1600x1200
> 

This is an archived page from the Intel site. Apparently the original
page is no longer available, but I found a copy.

http://web.archive.org/web/20070116044022/http://www.intel.com/support/graphics/intel865g/sb/CS-013743.htm

If that link doesn't work, the page was archived on a few different dates.

http://web.archive.org/*/http://www.intel.com/support/graphics/intel865g/sb/CS-013743.htm

As far as I know, they're referring to VGA. I don't know how
I'd figure out what your DVI is capable of. It will have
different limitations, due to the cooking up of the
various reduced blanking modes. (That takes effort
from the driver writer, and isn't particularly a
hardware issue.)

So it would seem the list is a bit bigger than that.

For your DVI output, this is the technology I was thinking of.
The picture here shows an ADD card. It plugs into the AGP slot,
and has a SIL164 DVI transmitter or equivalent on it. The thing
is, they can take the chips off this card, and solder them to your
motherboard, to drive a DVI output. And that is because the
AGP slot is not being used for anything (not for upgrading),
so the tiny chips here can be permanently connected.

http://www.intel.com/support/graphics/intel865g/sb/CS-009166.htm

While in theory, the SIL164 type device could support 1920x1200
at 60Hz, sometimes there are internal data rate issues inside
the GPU, that prevent it.

Here is another of those helpful pages from Intel.

http://www.intel.com/support/graphics/sb/CS-022544.htm

So I downloaded the 865G datasheet, and on PDF page 178, is makes the
claim they could do 2048x1536 via two DVO ports (connected to the
DVI transmitter chip). But that doesn't mean that the
implementation works that way.

http://download.intel.com/design/chipsets/datashts/25251405.pdf

As an example of a DVI transmitter, this one has two 12 bit interfaces.
And the 865G has two 12 bit interfaces multiplexed on the AGP pins.
The datasheet here claims up to "UXGA" display resolution on DVI.

http://www.siliconimage.com/docs/SiI-DS-0021-E-164.pdf

 From the Wikipedia page on DVI -

UXGA (1600 � 1200) @ 60 Hz with GTF blanking (161 MHz)

The question would then be, whether Intel can change the
setup of the 865G output to use this format. As long as the
"clock number" stays under 165MHz, it should work.

WUXGA (1920 � 1200) @ 60 Hz with CVT-RB blanking (154 MHz)

    Paul