28 Jun
2005
28 Jun
'05
3:22 p.m.
Ethan Dicks wrote:
On 6/28/05, Jim Beacon <jim at g1jbg.co.uk>
wrote:
Using a TEAC FD55GFR-149-U7 with my 11/53, and it's good with RSX11M+
and RT-11.
I have a couple of FD55GFR-7xxx drives, and I haven't found a jumper
setting that works for them. I think bridging a couple of solder pads
would get them there, but I haven't needed an RX33 that badly yet.
Doc
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