--- "Jerome H. Fine" <jhfinepw4z(a)compsys.to> wrote:
Ethan Dicks
wrote:
> The RKV11D is really an RK11D with a different bus interface...
So DEC actually made a Qbus compatible controller for the RK05?
Yes. I'm sure it was unpopular, but I do have one.
> so the
RKV11 is 16-bit address space.
If necessary, you could add a bounce buffer to the device driver
to take care of the problem. I did this with the DYX.SYS
driver - worked very well.
I know such things can be done. I have never written a driver to
do it. I have also not ever written an RT-11 driver, but that
wouldn't stop me.
It is also possible to run a KDJ11 system with just 56
KBytes of RAM!
Well, yes; I'm sure it is, but there's no point to that. I might as well
use an 11/23+ board (SIO and boot ROMs onboard - just add disk and RAM,
and if you are using/simulating a TU-58, disk is optional).
As for running with RT11FB (or even RT11SJ which slows
things down
too much), RT-11 will run Kermit very well in a 56 KByte memory
space.
OK. I thought so, but I haven't run Kermit on an -11 in a very long
time.
If you can copy the files to a SCSI hard drive, then
the second
stage is a CD.
If I had a Qbus (or Unibus) SCSI controller, I wouldn't have such
a quandry.
Available Qbus interfaces - RLV11, RLV12, RKV11D, DQ614 (haven't gotten
it working yet), KDA50 (still in the box; haven't use it yet), RQDX(123)
Available disks for the above: RL01, RL02, RK05J, various MFM disks DEC
and non-DEC, RA70, RA81, RA60
Mostly, when I put together a Qbus PDP-11, it has an RL02 or an RQDX
w/MFM drive on it. Those are my most "universal" drive sets. It's
also why I never went very far with 2BSD - 2xRL02 is kind awkward,
and MSCP isn't supported under 2.9BSD (and 2.11BSD requires a split I&D
CPU which I only recently acquired).
My expectation was to put an RLV11 or RLV12 in the same box as the
RKV11D and squirt a physical backup out the serial port, even if I
had to write the squirter myself. If I could use Kermit-11, that
would simplify transfer, as long as I had enough space to crunch
full RK05 disk images to a file on, say, an RL02 pack (probably have
enough room for one image + RT-11 + utilities on an RL01 pack, but
the RL01 drives are not here and the RL02 is).
What I _really_ need to do is perform this feat in pieces - I have
a couple of RL02 packs I need to archive, some with my own work from
15 years ago that I left behind with the boss that he later gave back
to me and does not exist anywhere else in the world. I was thinking
of making a physical transfer utility that I can tell "do the front 50%,
now the back 50%", etc., and export the backup in stripes and recombine,
probably under UNIX with "cat".
I don't know if this request is reasonable, but
anyone who can loan me
a Qbus RK05 controller can have the RK05 drive after I copy the
RK05 files to a SCSI hard drive. They can have the RK05 packs
as well.
I'll consider this. Would you want me to test the RKV11D first? I'm
in Ohio, so shipping becomes noticable overhead.
I do need to get the RKV11D back - I need its cables and paddle card
for my RK8E - same goodies and I need a working RK8E more than a
working RKV11D. I can always move things back and forth, especially
if the -8 is in the same rack or next to the RKV11D. I can't imagine
needing both controllers at once.
-ethan
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