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Re: framebuffer

Hi Ambar,
Thanx again.Ya ur answer has raised some issues.Now let me verify whether my
understanding of frame buffer is right.Every Video card has a frame buffer.A
frame buffer is nothing but the video memory.Normally u require the driver
for supporting some extra features
of the card like hardware acceleration,etc.Now since we are bypassing this
and writing directly to the video memory(Frame buffer)we cannot use any of
the special features of the card.This gives us a normal VGA
functionality.The frame buffer mode must be
enabled at boot up so that Linux in real mode  shifts to directly wriitng on
to the VideoRAM,instead of going via a driver. Any good links abt how Linux
writes on to the
framebuffer ,etc.
----- Original Message -----
From: Ambar Roy <ambarroy@xxxxxxxxx>
To: <linux-india-programmers@xxxxxxxxxxxxxxxxxxxxx>
Sent: Thursday, March 08, 2001 12:25 PM
Subject: Re: [LIP] framebuffer

> > Earlier in Redhat 6.1 when there was no support for SiS6326,framebuffer
> mode
> > was there.A framebuffer is nothing but the video memory.But what is  the
> > difference between this and the normal driver mode where we have 6326
> > driver?
> basically the framebuffer mode under linux is a special service provided
> the linux kernel! In the framebuffer mode, the linux kernel has the video
> drivers for the video card. This way you need to write just one x server
> which uses the framebuffer interface, and all the drivers can then be
> consolidated into the kernel. This has intresting uses other than x too. U
> can for example have a graphical boot up for linux (similar, but better
> the windows boot screens!) while the kernel loads, etc!
> Bye,
>     /\ |\/| |3 /\ r
> ---------------------------------------------
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