Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
Thanks very much for the info. I will try it.
"Paul" <nospam@needed.com> wrote in message
news:nospam-0604040437040001@192.168.1.177...
> In article <gZocc.16546$Dv2.9580@newsread2.news.pas.earthlink.net>, "mdp"
> <markdpend@spambegone.aol.com> wrote:
>
> > Anyone know how to change the amount of memory used by the onboard video
on
> > the Asus TUSL2 (not -C or other)? I don't see it anywhere in the BIOS
and
> > it is currently allocating a meager 1MB. Tx,
> > mdp
>
> If you download a copy of the 815 GMCH Northbridge datasheet from
> Intel, there are a couple of control bits that select the size
> of the frame buffer allocated in main memory. I think that is the
> info you are seeing:
>
> "Graphics Mode Select (GMS). This field is used to enable/disable
> the Internal Graphics device and select the amount of main memory
> that is ³Stolen² to support the internal graphics device in VGA
> (non-linear) mode only. These 2 bits only have meaning if we are
> not in AGP mode.
> 00 = Internal graphics device Disabled, No memory ³Stolen²
> 01 = Internal graphics device Enabled, No memory ³Stolen²
> 10 = Internal graphics device Enabled, 512 KB of memory ³Stolen²
> for frame buffer.
> 11 = Internal graphics device Enabled, 1 MB of memory ³Stolen²
> for frame buffer."
>
> If you aren't using an AGP card, the internal graphics do all of
> their stuff out of main memory. (If you actually own an AIMM
> module, that plugs into the AGP slot, I think that device takes
> the place of the frame buffer memory mentioned in the GMS definition
> above.)
>
> I'm not 100% certain, but the area reserved for 3D textures may
> be this one, when using the internal graphics engine:
>
> "Graphics Translation Window Size Select > would be the size of the
GTT (Graphics Translation Table).
> Not a valid bit in AGP mode.
> 0 = 64 MB (default)
> 1 = 32 MB."
>
> The same size options are available for the AGP Aperture (this
> would be when an AGP card is installed):
>
> "Graphics Aperture Size (GASIZE). Bit 3 operates on bit 25 of
> the Aperture Base (APBASE) configuration register. When this
> bit is 0, it forces bit 25 in APBASE to behave as ³hardwired²
> to 0. When this bit is 1, it forces bit 25 in APBASE to be
> read/write accessible. Only the following combinations are
> allowed:
> 0 = 64 MB Aperture Size
> 1 = 32 MB Aperture Size"
>
> So, the software you are using should be reporting 32M or 64M
> as the setting, rather than the setting for the frame buffer.
> (And even the frame buffer setting doesn't make sense, as
> a graphics resolution of 1280x1024x24bits is supported...)
>
> Unfortunately, many games will freak when they try to decode
> the characteristics of built-in graphics engines. In some
> cases, the game interprets a GMCH as not supporting AGP
> textures, and then the game will abort on the spot. A
> real PITA.
>
> (Northbridge datasheets)
>
http://developer.intel.com/design/chipsets/datashts/index.htm?iid=PCG+devleftnav&
> (The GMCH datasheet used for the excerpts above)
>
http://developer.intel.com/design/chipsets/datashts/290688.htm
>
> If you are using the onboard graphics, perhaps a newer "81x
> Chipset Family Graphics Driver" will make a difference.
> Scroll to the bottom of this page and select a driver for
> your OS:
>
http://www.asus.it/support/download/item.aspx?ModelName=TUSL2&Type=All
>
> You might find more recent GMCH drivers here:
>
http://downloadfinder.intel.com/scripts-df/Product_Filter.asp?ProductID=797
>
> HTH,
> Paul
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