Re: [iPAQ] Announcement: framebuffer VNC server port for the iPAQ

> > The polling method used to capture the content of the
> > framebuffer allows the server to be environment-agnostic,
> > but the flip-side is that the server has to run constantly
> > and use up some CPU. To alleviate the problem, all the speed
> > critical sections of the server are coded in optimized
> > assembler, so that even when the server is running, the
> > slowdown is barely perceptible. It works really well with
> > the Zaurus, and it seems to work just as well with the iPAQ,
> > if not better.

With a little kernel assistance that could be much improved. All you
need is an ioctl to read the dirty bits on pages of /dev/fbmem. At
one point dosemu was using basically the same trick.
Received on Sun Feb 17 17:23:46 2002