Date: Mon, 26 Jun 1995 08:16:30 +1000 From: Bruce Evans <bde@zeta.org.au> To: peter@haywire.dialix.com Cc: current@freebsd.org Subject: Re: i386/563: isa conflict detection cannot handle ioaddr 0x0 Message-ID: <199506252216.IAA08228@godzilla.zeta.org.au>
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>The conflict detection code does not allow for the possibility that >a device does not have an IO address. 0 is a valid io address. I think the bug is actually that config generates address 0 instead of an out of bounds address for devices that don't have an io address. The out of bounds address should probably be -2. -1 is used for address `?'. However, Config fails to distinguish between `?' and `none' for other items, and isa.c only knows that -1 is special, so the out of bounds address should be -1 for now. Bruce
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