On Wed, 16 Jun 2004, Andrzej Popielewicz wrote:Are You sure ?
I am porting one of the older releases of XFree, namely 2.1.
That's pretty old.
Simple question : what is the meaning of VGABASE (defined as 0xf0000000 or 0xff000000 depending on OS). vgaBase is the virtual address of memory mapped to VGA 0xa0000. vgaVirtBase is set to VGABASE for SVGA server (and to vgaBase for mono nonbanked) .Or in other words : how to set vgaVirtBase for SVGA ?
VGABASE is a value used to distinguish between banked framebuffer data, and non-banked framebuffer data (or pixmap data).
VGABASE is used(in banked case) in different vgaSetReadWrite etc routines(usually in assembler) , in order to set the corresponding bank for given buffer pointer. It is treated as usual address(pointer)(?).
Or You simply mean the same ?
The question is not what VGABASE is good for, but why it is set to 0xf0000000 .
Andrzej.
Marc.
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