Re: ISA slot detection on PCI systems?

From: Christian Koenig (
Date: Wed Jan 02 2002 - 16:28:04 EST


On Wednesday 02 January 2002 21:15, Eric S. Raymond wrote:
> Is there any way to safely probe a PCI motherboard to determine whether
> or not it has ISA cards present, or ISA card slots?
> Note: the question is *not* about a probe for whether the board has an ISA
> bridge, but a probe for the presence of actual ISA cards (or slots).
> (Yes, I'm working on a smart autoconfigurator. It's a development of
> Giacomo Catenazzi's code, but able to use the CML2 deduction engine.)

Nope, AFAIK even if the motherboard dosn't have ISA-Slots, the ISA-like
chipset (DMA/old IRQ/Timer) is still present because off compatiblity reasons.

But if you only want to know if a specified IO-range is on an ISA-card you
could try to turn off the PCI-ISA brige, done this with Intel chipset before
(they call this power saveing mode).

MfG, Christian König.
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