Asynchronous Video Console für Linux?

Asynchronous Video Console für Linux?

[Frank Mehnert]

Hi,

are there exist any projects for connecting video consoles to the Linux
kernel asynchronous? We would like to write a Linux video console for a
(comparatively) slow device which is able to run simple console 
applications upto the fbdev X-server.

Please cc your answer to me.

Frank
-- 
Frank Mehnert
## Dept. of Computer Science, Dresden University of Technology, Germany ##
## E-Mail: fm3@os.inf.tu-dresden.de    http://os.inf.tu-dresden.de/~fm3 ##

Re: Asynchronous Video Console für Linux?

[Pavel Machek]

Hi!

> are there exist any projects for connecting video consoles to the Linux
> kernel asynchronous? We would like to write a Linux video console for a
> (comparatively) slow device which is able to run simple console 
> applications upto the fbdev X-server.
> 
> Please cc your answer to me.

	I do not know about any such project and yes it would be nice.

Its bad to see find / limited by vesafb speed...
								Pavel
-- 
Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.

Re: Asynchronous Video Console für Linux?

[Alan Cox]

> > are there exist any projects for connecting video consoles to the Linux
> > kernel asynchronous? We would like to write a Linux video console for a
> > (comparatively) slow device which is able to run simple console 
> > applications upto the fbdev X-server.
> > 
> > Please cc your answer to me.
> 
> 	I do not know about any such project and yes it would be nice.
> 
> Its bad to see find / limited by vesafb speed...

There is no fundamental reason you cannot do this. For the kernel side the
console driver in text mode already gives you the 80x25 + attributes image
that you can use to do asynchronous video updates however your hardware
works.

XFree86 4.x has a shadowfb driver layer which does precisely what you need
for an asynchronous server engine. In fact for a real life example of 
XFree86 driving "asynchronous" hardware look at the XFree86 VNC drivers.

Re: Asynchronous Video Console für Linux?

[Pavel Machek]

Hi!

> > > are there exist any projects for connecting video consoles to the Linux
> > > kernel asynchronous? We would like to write a Linux video console for a
> > > (comparatively) slow device which is able to run simple console 
> > > applications upto the fbdev X-server.
> > > 
> > > Please cc your answer to me.
> > 
> > 	I do not know about any such project and yes it would be nice.
> > 
> > Its bad to see find / limited by vesafb speed...
> 
> There is no fundamental reason you cannot do this. For the kernel side the
> console driver in text mode already gives you the 80x25 + attributes image
> that you can use to do asynchronous video updates however your hardware
> works.

I never said it was hard to write... And it would make sun4 usable as
terminal, and would greatly help on vesafb machines.
									Pavel
-- 
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