Re: Bios

Peter Horton (
Mon, 18 May 1998 23:33:27 +0100 (BST)

On Mon, 18 May 1998, MOLNAR Ingo wrote:

> On Sun, 17 May 1998, C. Scott Ananian wrote:
> > I've got an even broader request: I'd appreciate pointers on bios hacking
> > and tools in general. APM suspend-to-disk breaks on my machine and some
> > others with Linux, and I'd like to disassemble my BIOS to figure out what
> > this code is trying to do that Linux isn't liking. We adhere precisely to
> > the official spec, but I have a feeling something's undocumented or
> > assumed. Even DOS mode tools or pointers would be great: what's the
> > easiest way to extract this code and analyze it?
> to dump the system bios, use:
> dd if=mem of=/tmp/bios_dump bs=1024 count=64 skip=960
> then use eg. 'ndisasm' from nasm, it produces correct 16 bit code too.
> (dont know wether objdump has been fixed recently) This should give you a
> way to look at the ideas implemented by the BIOS. Dont use the code, thats
> copyright protected.
> -- mingo

Newer BIOSes contain a lot of compressed code ...


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