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Date:      Thu, 19 Jun 1997 21:12:55 +0200
From:      j@uriah.heep.sax.de (J Wunsch)
To:        chat@FreeBSD.ORG
Subject:   Re: Status on LS-120 drive support? (moving to chat...)
Message-ID:  <19970619211255.MN57416@uriah.heep.sax.de>
In-Reply-To: <199706190904.SAA27186@genesis.atrad.adelaide.edu.au>; from Michael Smith on Jun 19, 1997 18:34:57 %2B0930
References:  <199706190815.EAA09892@ethanol.gnu.ai.mit.edu> <199706190904.SAA27186@genesis.atrad.adelaide.edu.au>

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As Michael Smith wrote:

> > The Linux IDE driver can support four busses, I think, so you can have
> > eight drives.
> 
> I've had four IDE controllers in an old '386 under 2.0; there's no
> hard limit other than I/O address and number of free IRQ's with the
> BSD driver AFAIK.

There has been a limit in 386BSD 0.1, due to some sloppy programming.
I remember that i had to patch the wdc driver so to use both, IDE and
ESDI in the same machine.  This has probably been the first machine on
the world running this combination.

In FreeBSD, this seems to have been fixed here:

revision 1.19
date: 1994/01/04 20:05:23;  author: nate;  state: Exp;  lines: +692 -574
New wd driver, based on Bruce Evans 'wx/altwd' driver which has passed
enough tests to be considered more stable than current driver.
...
Support for multiple controllers is in, but doesn't work correctly with
different controllers (IDE AND MFM), but multiple alike controllers appears
to work.
...

...that is, in FreeBSD 1.1.

-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)



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