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as some of you may know i have been messing around with linux kernel 0.0.1 and i have a problem i know that the head.s remaps all the memory but ...
- 06-04-2009 #1Just Joined!
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video memory location
as some of you may know i have been messing around with linux kernel 0.0.1 and i have a problem i know that the head.s remaps all the memory but i cannot seem to find the video memory does any body know the address, or is it different for each linux kernel, or is it dependent on something that i have not mentioned?
I know it is not a good idea to be writing to the video memory because it can be different on other platforms.
- 06-06-2009 #2Just Joined!
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The kernel usually accesses the video by BIOS int 10 video interrupt.
- 06-08-2009 #3Just Joined!
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i don't know if that is true because if they were to use the bios then it would slow stuff down so they try to avoid the bios as much as possible. I do know that many boot loader use int 0x10 before they enter protected mode, but i thought that int 0x10 is no longer useable once it enters protected mode
- 06-08-2009 #4Linux Guru
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Everything I read indicates that using the framebuffer is probably the only way to go. You can access it via ioctl functions. Sorry, but that's as far as I got so far.
Sometimes, real fast is almost as good as real time.
Just remember, Semper Gumbi - always be flexible!
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