PDP 11 floppy disk question.

[Allison]

>
>Subject: Re: PDP 11 floppy disk question.
>   From: Ethan Dicks <ethan.dicks at gmail.com>
>   Date: Tue, 28 Jun 2005 17:00:20 -0500
>     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>On 6/28/05, Jim Beacon <jim at g1jbg.co.uk> wrote:
>> A simple question, I hope!
>> 
>> Can I use a normal 51/4" dsdd floppy drive with an RQDX3, in place of the
>> twin drive RX50 unit? If so, do I need a special cable?
>
>The Teac FD55-GFR was commonly used on PCs and, when the jumpers are
>strapped the way DEC did, _is_ an RX33.  There are some variations on
>how some of the signals are presented (pins 2 and 34, IIRC) and how
>motor start and select interact, so you _do_ have to check jumpers. 
>Once you have a prepared FD55-GFR, it will go on the end of an RQDX3
>just fine.  I know VMS has no problem with it, but I can't comment on
>Unix or PDP-11 use.
>
>If I had a pointer to the configuration, I'd post it, but I know such
>things are hanging around on the 'net and in list-members directories.
>
>-ethan

The TEAC FD55GFR is the official RX33 (IE: dec bought and used the 
teac) and works fine with RQDX3 with the distribution pannel 
(ba23 or from BA123).  I have a vax and a 11/73 using that combo.


Allison