MFM or ESDI QBUS controller for one PDP-11/23 PLUS - test-drb@ccmp.vtda.org

9 Oct 2007

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Subject: Re: MFM or ESDI QBUS controller for one PDP-11/23 PLUS
   From: "Glen Slick" <glen.slick at gmail.com>
   Date: Tue, 09 Oct 2007 11:55:21 -0700
     To: "General Discussion: On-Topic Posts Only" <cctech at
classiccmp.org>

On 10/9/07, Allison <ajp166 at bellatlantic.net> wrote:
  The only MSCP boards I've used that
didn't require breakout were
 SCSI.

I have at least three Q-bus MSCP ESDI controllers that have standard
20-pin & 34-pin IDC header ESDI connectors, no breakout required.
Emulex QD21, Dilog DQ696, Sigma SDC-RQD11.  They are hard disk only
though, so maybe in general controllers with floppy support do require
breakout adapters. 
That may be the difference as all of my MSCP with RQDXn replacements
need a breakout or a funky cable to do it. I do not have anything 
for ESDI.  

Allison

...
 I also have an Andromeda ESDC Q-Bus ESDI controller
which I haven't
been able to use yet as I am lacking documentation on how to configure
it.  Anyone have a manual?  I don't see any Andromeda manuals at all
on bitsavers.

-Glen 