QVGA V/s VGA for GTA03 (was something about yummy CPU-GPU combos!)

Michael 'Mickey' Lauer mickey at openmoko.org
Sat Jun 7 11:44:07 CEST 2008

On Friday 06 June 2008 19:18:43 Dr. H. Nikolaus Schaller wrote:
> Yes. This should be IMHO the future for GTA03 - use a better chipset
> rather than a worse display resolution.

Full ACK.

> Some application I have choosen makes regular screen updates:
> Neo 1973		every 0.5 seconds (due to more work for the higher number of
> pixels)
> Acer n30		every 0.3 seconds (same CPU but QVGA)
> Zaurus C3100	every 0.3 secons (with X/Qt on VGA)
> So, the difference is not that large by different architectures and
> display resolutions.
> The astonishing thing is that the C3100 is faster than the Neo with
> the same display.
> I.e. Display resolution by itself can not be the main issue with speed.

The PXA27x runs circles around the S3C2410.

> This brings me to a point not discussed so far. IMHO it also depends
> on whether Finger or Pen
> operation is used. With the finger, you have to reduce the display
> content anyway - like the iPhone
> working with many sheets moving from left to the right etc. But if you
> operate by pen, you have a
> much better precision so select something and you expect and can
> handle a much higher information
> density on a single page. So, a better screen reduces the number of
> flipping/switching operations.
> Finally, I think since the GTA03 platform should not rule out either
> finger or pen operation, it must fulfill the higher requirements.

That's what I was thinking as well.



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