On 31 May 99, at 11:53, Joan Rapier wrote:

> The video board is an ATI Rage IIC (AGP) w/ 8MB.  I had the display
> properties set at True Color (24-bit) at 1024 x 768 (on a 17" Viewsonic
> E771-2 monitor) originally.  I can alleviate the problem to a great
> extent by dropping the colors down to High Color (16-bit).
>
> Is this a case of needing more or faster video RAM?

  8 MB is plenty, and it may be fast enough.

  Does the driver provide a 32-bit setting?  x86 CPUs transfer data to memory
in 8-bit, 16-bit or 32-bit wide chunks; a 24-bit colour setting means that
every write of a pixel requires two memory transfers, one 8 bits wide and one
16 bits wide.  [Caching video RAM can help; you might have that (or some
other caching) turned off.]

  Have you told the BIOS to allocate an IRQ to the video card?  Is it sharing
that with any other device?




David G

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