how does linux 2.0.x support vga
On Tuesday 29 August 2006 22:35, Dances With Crows stood up and addressed the mbuttes incomp.os.linux.miscas follows...:
composlinuxmisc Options to programs usually start with "-", so grep is trying to interpret -2718 as an option to grep rather than a pattern. Most Unix command line utilities use "--" to...
Actually, the kernel can switch the video modes from within protected mode, via the V86 mode. X11 also uses this to switch the video adapter into graphics mode.
V86 is a special real mode-compatible protected mode, which supports running multiple "virtual real mode" applications - e.g. viadosemu- simultaneously. Even OS-2 and Windows 3.x (in "386 Enhanced Mode") made use of this to run real or emulated DOS sessions, with mulbreastasking between them.
That which switches the video modes on boot via thevga=statement is not the kernel itself, but the bootloader code - which does run in real mode onx86,yes - unless you're using ELILO on a system with an EFI BIOS, of course, but I haven't seen those forx86yet, although it has been announced. However, in the Linux kernel boot process, the CPU is already in protected mode before the kernel image is being decompressed.
It is also possible to setvga=normalin the bootloader - or simply not allow for anyvga=statement at all - and use avideo=statement as a kernel boot parameter, provided that the kernel has a framebuffer driver for your video adapter built-in - or as a module perhaps, I haven't tried that - and have the kernel switch video modes right after it has already started to show output to the console and write to the bootlog.
Hi all, (1) The bash command below is meant to firstly list all files with the specified name; and then print a line containing -2718. It is proven very useful for me to make...
-- With kind regards,
Pre-PS - I now have two questions) I have a Fedora Core 4 system that I'm trying to understand. For someone who is inexperienced at lots and lots...
*Aragorn* (registered GNU-Linux user #223157)