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From: Søren Schmidt <sos@sos.freebsd.dk>
Message-Id: <199709071855.UAA17987@sos.freebsd.dk>
Subject: Re: IDE Hardware hack
In-Reply-To: <199709071028.AA00984@abel.cs.curtin.edu.au> from Richard Sather at "Sep 7, 97 06:28:55 pm"
To: satherrl@cs.curtin.edu.au (Richard Sather)
Date: Sun, 7 Sep 1997 20:55:43 +0200 (MEST)
Cc: freebsd-hackers-digest@FreeBSD.ORG
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In reply to Richard Sather who wrote:
> Hello out there...
> 
> I currently have an old 486 running FreeBSD 2.1.7.1 at home with 4 IDE
> hard disks attached (using local buss cards). The other day I decided to
> try adding another 2 by making a few hardware mods to an ISA IDE card.
> I have cut/rerouted the interrupt 14 line and tried various methods of
> changing the address lines (by swapping and by running a 74ALS04 inverter
> between the ISA address lines and the card). FreeBSD picks up the extra
> wdc OK but steadfastly then refuses to acknowledge theres a hard disk
> attached to the card. My question is 'what am i missing', it does seem
> to me reasonable that I can do this? Any ideas would be appreciated, I
> eventually want to get an array of disks working (2 are already using
> ccd).

I did this once long ago on a cheapo IDE card, IIRC there was a problem
with the status port (that one that share with the floppy ctrl), that
demanded a bit more logic..

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Søren Schmidt               (sos@FreeBSD.org)               FreeBSD Core Team
                Even more code to hack -- will it ever end
..