Subject: Re: Oooooh... IDE to Q-bus/Unibus adapters.
To: Brian D Chase <>
From: emanuel stiebler <>
List: port-vax
Date: 07/07/1999 16:03:48
----- Original Message -----
From: Brian D Chase <>
To: Michael Kukat <>
Cc: emanuel stiebler <>; <>
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 ...