Date: Mon, 17 Jul 95 18:36:23 MDT From: terry@cs.weber.edu (Terry Lambert) To: karl@Mcs.Net (Karl Denninger) Cc: julian@ref.tfs.com, karl@mcs.com, freebsd-hackers@freebsd.org Subject: Re: Twinchannel SCSI Adapter change Message-ID: <9507180036.AA21829@cs.weber.edu> In-Reply-To: <199507172208.RAA02711@Jupiter.mcs.net> from "Karl Denninger" at Jul 17, 95 05:08:47 pm
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> > You really need to probe them in the same order as DOS (the BIOS) does, > > or you may not be able to get to your root disk and boot from it as well.. > > (the C:->sd0 > > D:->sd1 > > -- > > E:->sd2 > > mapping would become > > C:->sd1 > > D:->sd2 > > -- > > E:->sd0 > > > > > > and I'm pretty sure we couldn't boot from that :) > > The boot/kernel translation needs a LOT of work.. > > If the kernel read the EISA config, this would be possible. > > But it doesn't, and thus isn't. Reading the EISA config requires a VM86() interface. This is because you will choke on about 20% of all EISA systems if you make the normal assumption about CMOS memory size: the EISA standard does not have specific requirements for per slot CMOS memory sizes. Terry Lambert terry@cs.weber.edu --- Any opinions in this posting are my own and not those of my present or previous employers.
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