From mboxrd@z Thu Jan  1 00:00:00 1970
From: dfevans@bbcr.uwaterloo.ca (David Evans)
Date: Tue, 20 Jan 2004 08:58:31 -0500
Subject: [pups] roll-your-own-unibus boards?
In-Reply-To: <003801c3df20$2ad8baa0$eb8ca140@ca.sco.com>
References: <200401192338.i0JNcb121320@mwave.heeltoe.com>
	<003801c3df20$2ad8baa0$eb8ca140@ca.sco.com>
Message-ID: <20040120135831.GB10019@bcr10.uwaterloo.ca>

On Mon, Jan 19, 2004 at 10:39:33PM -0800, Michael Davidson wrote:
> Several people have built IDE controllers for the QBUS.
> 
> ftp://digital.dp.ua/DEC/ata/README.txt
> 

  This one even claims to have a Unibus variant!

> Yes, but assuming that you are only implementing programmed i/o
> there will be so little logic involved that you might as well just use
> discrete TTL.
> 

  I think that's what the above gizmo does.  However, a DMA engine may not
be difficult with the appropriate FPGA.

-- 
David Evans                                         dfevans at bbcr.uwaterloo.ca
Ph.D. Candidate, Computer/Synth Junkie     http://bbcr.uwaterloo.ca/~dfevans/
University of Waterloo         "Default is the value selected by the composer
Ontario, Canada           overridden by your command." - Roland TR-707 Manual