On Tue, 17 Jul 2001, James Simmons wrote:
> > First I try the vga16 frame buffer driver,but i can only get
> > some black/white strips on the screen.(after made some changes
> > to the source,most important one is use pci to find and set the
> > vbase address).
>
> It is hardwired into the vga16fb driver the memory region (0xA000). This
> is very wrong on non intel platforms. So that drivers pretty much doesn't
> work on anything else.
Does your firmware initialize the VGA card to VGA text mode? Vga16fb requires
this initialization, which is normally done by the VGA BIOS. An x86
BIOS-emulator may be your friend.
> > Then I try to use vesa driver. This one use some vgabios code
> > I commented out the x86 relevant codes and made it compiled,
>
> The VESA framebuffer is also intel specific. It uses the BIOS to setup the
> video mode. This is done long before the cpu is placed into protect mode.
Similar issue here.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven ------------- Sony Software Development Center Europe (SDCE)
Geert.Uytterhoeven@sonycom.com ------------------- Sint-Stevens-Woluwestraat 55
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