shadowing video

[James McNeill]

Do forgive my ignorance, but I thought that shadowing was puerly to try 
and improve performance. My understanding was that the BIOS bus was sub 
standard so by copying BIOS functions into RAM it could be accessed faster.

I've never looked into it more than that. Can anyone explain the 
technics behind why it's bad to shadow?

-James

Scott D. Ferguson wrote:

><I've just inherited a Linux box with Debian installed.
><In the BIOS setting I notice that all shadowing <options have been selected (including video).  <Normally (under OS/2 or Win9x) I would de-select <these options.
><What option is best (for performance) under Linux?
>
>Answering my own question :-)
>
>According to Debian documentation - best option for performance is to turn off ALL shadowing (video and bios).
>---
>If 6 million people believe a stupid thing,
>        - it's still a stupid thing...
>
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