----- Original Message -----
From: Brian D Chase <bdc@world.std.com>
To: Michael Kukat <michael@camaronet.de>
Cc: emanuel stiebler <emu@ecubics.com>; <port-vax@netbsd.org>
Sent: Wednesday, July 07, 1999 2:32 PM
Subject: Re: Oooooh... IDE to Q-bus/Unibus adapters.


> It would of course be
> very nice if everyone had Q-bus SCSI controller, or MCSP speaking UltraDMA
> IDE controllers for their Q-bus and Unibus MicroVAXen, but it's not going
> to happen.

Why ?

> A cheap PIO IDE option would be nice.

But a cheap IDE means, that you have "slow" (PLEASE NO DEBATE about this
word slow ;-)) q-bus vaxen, which are polling this ide port. I don't think,
this makes sense. The most faster Vaxen have SCSI already, so this IDE is
only for the MV/MV2/MV3. ( I don't forget the PDP11, but this is not the
Mailinglist for them ;-))

So a Busmaster DMA is the way to go ...

cheers,
emanuel