Date: Fri, 20 Sep 1996 13:15:46 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: smpatel@umiacs.umd.edu (Sujal Patel) Cc: janus@freegate.net, hackers@FreeBSD.org Subject: Re: Plug and Play naivety Message-ID: <199609202015.NAA02942@phaeton.artisoft.com> In-Reply-To: <Pine.OSF.3.91.960920141158.31553C@mickey.umiacs.umd.edu> from "Sujal Patel" at Sep 20, 96 02:14:14 pm
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> > 1. mail from Sujal notes that "if your motherboard supports PnP > > devices, then you don't need this code". What does this mean? > > I've been told that the BIOS on the machine I'm using has > > "Plug and Play" support ... does this mean it's possible that the > > BIOS has queried the ISA devices on boot and already has all the > > config info? Can I get at this somehow from the kernel? Or is this > > only referring to PCI kind of Plug and Play? > > The PnP-aware BIOS will configure all ISA PnP cards (to the best of it's > ability) during the boot up cycle. If the BIOS gets this wrong (which it > often does), you'll need to either use the PnP driver or turn if PnP (if > the device supports that option). This exchange implies that the kernel will not use the PnP information in the presence of a PnP BIOS to configure the drivers. Can you confirm or deny this? The benefit of the PnP code is not simply configuration of devices in the absence of a PnP BIOS, but also in the provision of hints to the device drivers. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
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