OSDev.org

Hello boyz!

- I have one problem with VESA!

I included to my protected mode OS kernel VESA 2.x check (before PM set). Since then my OS work bad (e.g. when I press enter, computer freezes, sometimes it freezes when I press any key or sometimes is generated interrupt exception). Where can be problem? Is something changed (when I only set scr. res., all is ok)?

- I have VESA 1.2 ( ) - but in VESA 2.x check is Vesa 2.0 function (can be problem this?)

- Will VESA bank switch function work on graphic cards with VESA 2.x+ (linear framebuffer)???

Thanks for answers.
steve

You may find youre answer in the official vesa specifications...

I would personally use the linear frame buffer for speed more than anything...

check that the VRAM don't overwrite youre kernel
I encountred the the same problem when my kernel was loaded in the first MB.
Try to load your kernel after the first mega byte.
if you use paging try to mark all the vram and BIOS rom as used pages.