lkml.org 
[lkml]   [2002]   [Jan]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: ISA slot detection on PCI systems?
root@chaos.analogic.com (Richard B. Johnson)  wrote on 03.01.02 in <Pine.LNX.3.95.1020103100747.4554A-100000@chaos.analogic.com>:

> ISA has nothing. Just fixed port addressing where an attempt
> is made to find out something about the hardware by writing
> and reading the results. If you think you have device 'A'
> at port N, but you don't, and you write something to condition
> device 'A' for a response, you could, in fact, tell another
> device to hit the reset switch or, worse, format your disk(s).

Best-known example is probably trying to autodetect anything but a NE2000
card before detecting the NE2000 card that's in the machine.

I've even seen BIOSes freeze in that situation. And yes, I do mean whole-
machine-freeze. An NE2000 *really* doesn't like being touched the wrong
way.


MfG Kai
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:15    [W:0.155 / U:0.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site