Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!orca!javelin.sim.es.com!blgardne
From: blgardne@javelin.sim.es.com (Blaine Gardner)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: (was RAMSEY) 2nd SCSI controller
Message-ID: <1991Apr25.141228.8809@javelin.sim.es.com>
Date: 25 Apr 91 14:12:28 GMT
References: <1991Apr12.002442.3871@minyos.xx.rmit.oz.au> <1991Apr23.010944.10776@ariel.unm.edu> <20874@cbmvax.commodore.com> <41588@cup.portal.com> <20912@cbmvax.commodore.com>
Reply-To: blgardne@javelin.sim.es.com
Organization: Evans & Sutherland Computer Corporation
Lines: 27

daveh@cbmvax.commodore.com (Dave Haynie) writes:
>In article <41588@cup.portal.com> FelineGrace@cup.portal.com (Dana B Bourgeois) writes:
>>Dave, 
>Who, me?  Is this comp.sys.amiga.haynie or something :-)

>>I haven't seen anyone ask this before.  Can you run more than one SCSI 
>>controller in an Amiga?  If so, is there any special setup to do to make it 
>>work?  (over and above the usual stuff)

>Not usually.  For kicks, I ran an A3000 set up with A2091, Hardframe, and
>internal SCSI drive all going at once.  It ran for over two weeks, basically
>until I had to take it down for other purposes.

Just a note here that Joanne Dow (the Wizardress that created the
Hardframe software) said on BIX the other day that the Hardframe is not
supported on the A3000, and Microbotics has no plans to make it A3000
compatible.

The problem is the Hardframe expects to DMA into Fast RAM starting at
$200000 (the Zorro II Auto-Config space), and the A3000 has no memory
there so the HF "gets terribly confused". It can be made to run by
restricting the HF to Chip RAM with the MASK parameter, but then it
slows down considerably.
-- 
Blaine Gardner @ Evans & Sutherland  580 Arapeen Drive, SLC, Utah 84108
blgardne@javelin.sim.es.com                               BIX: blaine_g
DoD #46           My other motorcycle is a Quadracer.            FJ1200