readme.vesa

linux 下svgalib编的一个界面程序示例

Notes for the VESA driver:

The driver's autodetection is disabled by default, so in order to use it,
the line 
chipset VESA
must be added to the config file (usually /etc/vga/libvga.config).

The error:
Int 0x10 is not in rom (xxxx:xxxx)
is usually caused by running linux using loadlin, after loading a dos tsr
that changes the int 10 vector, or after windows 95, that does the same
thing. The solution, is either to use lilo, or run loadlin after a clean
dos boot.


There is a new config file option that affects the vesa driver:
VesaText
If this option is used, the driver sets 80x25 text mode (using vesa bios)
before setting any standard vga mode.

This option was added in order to enable standard vga modes with the vesa
driver on Matrox Millenium, but now it has the following effect:
(read in a fixed width font)

chipset              with VesaText          without VesaText

CL-GD5446              works                leaves a messy font when
                                            returning to text mode

Riva 128             does not restore           works 
                     previous used text
                     font, but reverts to
                     ROM font.

Matrox
Millenium             works                 does not set standard vga
                                            modes properly.

A list of cards known to work with the VESA driver is:
     * Riva128 (both on a STBV128 and a Viper330)
     * RivaTNT
     * Matrox Millenium 2
     * Matrox Mystique
     * Matrox Productiva G100
     * Matrox Millenium G200 
     * Neomagic Magicgraph 128XD (in a Dell Inspiron laptop)
     * S3 375 Virge/DX ( A "Trident Video Excel 3D Accelerator" ) 
     * S3 Trio3D
     * Cirrus Logic GD5446
     * Rendition V1000 - Only modes up to 800x600 seem to work
     * ATI Expression+ PC2TV 2MB (RageII chipset) - tested only modes up
       to 800x600 resolution 
     * ATI Xpert 2000
     * i740 (Diamond Stealth G460)     
     * Voodoo Banshee
     * Alliance Technology AT24

Please note that some of this cards have also failed to work in some
cases, so it is _very_ configuration dependent.

For Matrox cards, the advice is to upgrade to the latest bios from Matrox.