Subject: Re: RXV21 with 5.25 floppy
To: None <jkunz@unixag-kl.fh-kl.de>
From: Carl Lowenstein <cdl@mpl.ucsd.edu>
List: port-vax
Date: 05/27/2001 16:34:19
> From port-vax-owner-clowenst=ucsd.edu@netbsd.org Sun May 27 13:55 PDT 2001
> Delivered-To: port-vax@netbsd.org
> Date: Sun, 27 May 2001 22:54:41 +0200 (CEST)
> From: jkunz@unixag-kl.fh-kl.de
> Subject: Re: RXV21 with 5.25 floppy
> To: simul8@simul8.demon.co.uk
> cc: port-vax@netbsd.org
> 
> On 27 May, James Lothian wrote:
> 
> > Some of the third party RX02 emulators used more standard setups,
> > though, and worked with standard drives, so you might have more luck
> > there. 
> It is no original DEC RXV21. It is a third paty product, "MXV21" made by
> "MDA". There is all the stuff on it to make it a complete controller.
> Read/write circuit, 2 x AM2901 with all the AM29xx stuff around it,
> TMS4044 SRAM, ... It has the usual 50 pin connector for 8" floppy
> drives. If I plug it into one of my QBus VAXen it is shown as RXV21 by
> the "show qbus" command. 

I'm pretty sure that the MXV21 could actually format floppies, unlike
the DEC original.  Someone must have a manual for it.  I might have
one, if I can remember where to look for it.

    carl
-- 
        carl lowenstein         marine physical lab     u.c. san diego
        {decvax|ucbvax} !ucsd!mpl!cdl                 cdl@mpl.ucsd.edu
                                                  clowenstein@ucsd.edu