Bios is simply software.  You can replace parts or all of bios with
other software, since BIOS is called through software interrupts.  You
simply replace their interrupt handler, or change the interrupt handler
pointer, or change the handler pointer, then when you're done messing
witht the data call the original bios handler to do the hard lifting.

The software interrupt table is in memory, so it doesn't matter whether
bios loads into memory or is run directly from flash.

-Adam

Olin Lathrop wrote:

>>"Ontrack"  disk manager software (often available free from the disk
>>drive supplier) has helped overcome disk size limitations on several
>>occasions. You MAY need an older version, but maybe not.
>>
>>Here's their site, but they probably won't give you the free version
>>directly.
>>But you can always ask.
>>
>>
>
>How is any software that isn't part of the bios supposed to help the bios
>see the disk drive?
>
>
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