Timothy Normand Miller wrote: > On Sat, Oct 23, 2010 at 1:22 PM, Patrick McNamara <[email protected]> > wrote: > > As it currently sits, the framebuffer driver is decent enough with the > > exception of full screen scrolling. That is very painful. > > This is in part because PCI reads take about 4x as long as writes. > The writes get combined into bursts (MTRR setting), while reads are > separate transactions. > > A dirty fix for this would be to avoid PCI reads entirely.
I would look at implementing a blit or shift primitive on the board instead. //Peter _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
