Messages in this thread | | | Date | Wed, 6 Jan 1999 11:09:29 +0100 | From | Thomas Pornin <> | Subject | fbcon vs. text console |
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In article <Pine.BSI.4.05L.9901050439240.1636-100000@mail.his.com> you write: > Brain malfunction. Do not understand. Please try again.
If you use vesafb: the trick is to switch to a high-resolution graphic mode using the video card bios (or a dos tsr program if you boot with loadlin) before entering the kernel mode (see arch/i386/boot/video.S), and then get from the bios functions a usable framebuffer. Once the kernel is booted, you can no longer call bios functions (for they run in so-called "real-mode", the old 16-bits way of 8086) and therefore you have to stick to the current video mode (to switch from one video mode to another requires that you know how to speak to the video card, and the whole vesafb thing is about using high-resolution modes without having this information).
--Thomas Pornin
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