13 Apr
2019
13 Apr
'19
3:07 p.m.
I have a PDP-11/23+ with two RL02's in a corporate cabinet but no floppy
drives. Also an RXV21 (M8029) card.
My PDP-8/A has RX01 drives, and I was hoping just to run the cable over to
the -11 when I wanted to use floppies on it.
But after some searching, it appears that the RXV21 will only work with an
RX02 drive...
Just wondering what my options are for hooking up any kind of floppy drives.
I could sell the RXV21 and buy/trade for an RXV11 (M7946) instead, to use
with the RX01 in the other rack.
Or look for an RX02 that won't break the bank - but that won't fit in the
corporate cabinet. I do have another cabinet but it's got other rack-mount
gear in it at the moment.
What about smaller drives (RX50? RX33?)... can those be interfaced to the
11/23+ Qbus?
Other thoughts?
thanks
Charles
8:24 p.m.
On 04/13/2019 06:07 PM, Charles via cctalk wrote:
I have a PDP-11/23+ with two RL02's in a corporate
cabinet but no
floppy drives. Also an RXV21 (M8029) card.
My PDP-8/A has RX01 drives, and I was hoping just to run the cable
over to the -11 when I wanted to use floppies on it.
But after some searching, it appears that the RXV21 will only work
with an RX02 drive...
Just wondering what my options are for hooking up any kind of floppy
drives.
I could sell the RXV21 and buy/trade for an RXV11 (M7946) instead, to
use with the RX01 in the other rack.
Or look for an RX02 that won't break the bank - but that won't fit in
the corporate cabinet. I do have another cabinet but it's got other
rack-mount gear in it at the moment.
What about smaller drives (RX50? RX33?)... can those be interfaced to
the 11/23+ Qbus?
Other thoughts?
thanks
Charles
RX50, RX33, RX23 aall work with the RQDX2,3 controllers The boards and
cables are fairly easy to find as they were
used in microPDP11 and Qbus Microvax.? Depending on the CPU they will be
bootable (11/23+ I believe works).
IF you lucky and can fine a quantum D540 or St225 you can have a hard
disk as well.? I have 11/23+ and 11/73
configured using that (rqdx2 in one and Rqdx3 in the other) and the
breakout board.
Many people skip over the MSCP controller for MFM hard disks as the hard
drives are scarce, but floppies
a Teac FG55GFR is the hot item as would be a RX50 or 1.44 3.5" floppy or
all three as it can interface not
less than two floppy drives.
Allison
11:47 p.m.
On Sat, Apr 13, 2019 at 3:07 PM Charles via cctalk
<cctalk at classiccmp.org> wrote:
What about smaller drives (RX50? RX33?)... can those be interfaced to the
11/23+ Qbus?
Pick up a common as dirt M7555 RQDX3. If you don't have a BA23 with
the built in distribution board for the M7555 RQDX3, then pick up an
M9058 distribution board to break out the signals from the M7555
RQDX3.
For example, this one which is incorrectly listed as an M9056:
https://www.ebay.com/itm/VINTAGE-DEC-Digital-Equipment-M9056-5016673-01B1-R…
14 Apr
14 Apr
12:17 a.m.
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Glen Slick via cctalk
Sent: Sunday, April 14, 2019 2:48 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Adding floppy drives to my PDP-11?
On Sat, Apr 13, 2019 at 3:07 PM Charles via cctalk
<cctalk at classiccmp.org> wrote:
For more information and roll-your-own instructions, see:
http://avitech.com.au/?page_id=645
Malcolm may still have PCBs available; shipping from Australia.
-----
What about smaller drives (RX50? RX33?)... can those be interfaced to the
11/23+ Qbus?
Pick up a common as dirt M7555 RQDX3. If you don't have a BA23 with
the built in distribution board for the M7555 RQDX3, then pick up an
M9058 distribution board to break out the signals from the M7555
RQDX3.
For example, this one which is incorrectly listed as an M9056:
https://www.ebay.com/itm/VINTAGE-DEC-Digital-Equipment-M9056-5016673-01B1-R…
2078
days inactive
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4 comments
5 participants
participants (5)
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aek＠bitsavers.org -
allisonportable＠gmail.com -
charlesmorris800＠centurytel.net -
glen.slick＠gmail.com -
pbirkel＠gmail.com