Re: PCI and ISA bus comparison

From: tcs (dzshen_at_winbond.com.tw)
Date: 04/26/04 

Date: Mon, 26 Apr 2004 14:39:42 +0800

> > (1) for PCI devices, even the software (device driver) is not
> > loaded, we can still see this piece of hardware through
> > /proc/pci. why can't we do the same thing for ISA hardware?
>
> Because you can't. :)

  Great! That's the answer I am looking for!

> Right. There's nothing to _find_ on the ISA bus. The best you
> can do is load a driver for a specific board, and let it try to
> figure out if the board is there by talking to it and seeing if
> it answers. This is rather risky, since you don't know _what_
> your talking to, and what's there might misunderstand the
> commands if it's not the board you think it is.

  I am a first-time device driver for ISA device but I did have experience
for PCI device. OK, what are the standard procedures for a software driver
to detect whether a special piece of hardware exists?

thanks

tcs

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