[OpenBIOS] asm code

James jvh at uclink4.berkeley.edu
Mon Feb 21 15:27:57 CET 2000


> hi sorry this is slightly off topic but i need some asm code to clear
> the screen in the linux kernel -- just after it says uncompressing
> linux. how would i implement this in assembler, that would compile
> under gas. thanks edwin

By the time it says "uncompressing linux" it is already in 32 bit mode C
code (inflate.c).  It is writing to the screen directly at memory address
0b8000.  To clear the screen, just zero 0b8000 - 0bfff0.

> ps. will you eventually implement all the standard bios calls so that
> other os's such as dos etc will run under open bios? or will it be
> just a bios for linux?  thanks and good luck.

I believe the goal is to get support for the 32 bit OSs that don't use the
BIOS, like WinNT, BeOS, Linux, BSD, and others (at least I think that is
the goal and I think those OSs don't use the BIOS).

	- James

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