Re: accessing video ram

> Hello,
>
> I would like to know if it is good idea to draw console screen (like
> setpixel) in rt kernel-space. I've searched through the list and noticed
> that someone has played with it but there were no detailed information.
> Otherwise I will try to install qt/embedded and use rtf's. Hope this is
> applicable.
>
as a rule of thumb don't do in RT-context what you can do in 
non-RT-context especially in user-context thus I would recommend using
rtfifos or shared memory and whatever graphic package you like in
user-space.

directly writing to video ram could have quite strange effects if the
drivers in non-RT Linux don't know about this (i.e. overwriting it fast
enough that you don't see it even if you successfully write to the 
display)

hofrat
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