Re: video driver protocol

[Elmar Haneke]

Ramon van Handel wrote:

> Yes it is, but an optimised video driver isn't the real world --- it's a hack
> made specifically for VMs.  You don't HAVE to make it work like in the real
> world!  It should be possible to do what you want (if it isn't it needs to
> be added!), but I wouldn't do it this way for the optimised driver.  What I'd
> do:
> 
> (1) let the guest allocate a piece of physical memory
> (2) let the guest pass the address to the plex86 plugin using I/O ports
> (3) the plex86 plugin will use the specified chunk of memory for its
>     framebuffer.

The VM should not waste CPU-ressources on scanning this buffer for
changes.

There should be an mechanism to tell the host-code which parts of the
frame-buffer have to be redrawn.

Elmar