nanogui@linuxhacker.org

nanogui@linuxhacker.org


Subject: Re: Running document -- RTEMS framebuffer interface specification
From: Greg Haerr
Date: Fri, 4 Feb 2000 10:40:29 -0700

Rosimildo,
    As I think about this a little more, one important factor is
whether or not RTEMS wants to support graphics mode for
console operation.  This adds complexity.  If merely a framebuffer
is desired, it is quite a bit simpler, because all RTEMS has to manage
is the switch between text and graphics, video init, and the actual
framebuffer mapping.

To support a graphics console, there have to be quite a few more entry points,
and the framebuffer code has to support being accessible inside
the kernel, rather than just address-mapped video memory access to
applications.

Frank's PK supports a graphics console, and he has kept the
system quite simple.  Perhaps his code is a good place to start.

Greg


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