27 Jul
2004
27 Jul
'04
4:47 p.m.
On Tue, Jul 27, 2004 at 11:31:38PM -0500, Doc Shipley wrote:
That's right... I remember that. I always wanted to fiddle with that. Last
I heard, it was working with some hosts and not others (PDP-11 vs PDP-8
differences, mostly). It looked interesting, but personally, my problem is
not enough Omnibus controllers to go into all of my machines, as opposed
to not enough drives to go around.
-ethan
--
Ethan Dicks, A-130-S Current South Pole Weather at 28-Jul-2004 04:30 Z
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Ethan.Dicks(a)amanda.spole.gov http://penguincentral.com/penguincentral.html
OK. I've heard yea and nay on this count.
You're saying that on an RT-11 system (no OS/8 or its hardware to
play with), I can take an "IBM 3740 Compatible" SSSD disk out of the
box, run FORMAT/DOUBLE, and have an RX02 diskette? That would help
quite a lot.
AFAIK, yes... that's true. The RX01 media that DEC used to sell was
"IBM 3740 Compatible", and that's what I remember doing to "turn"
RX01Ks
into RX02Ks on an RT-11 system. If anyone has any contradictory
information, please feel free to pipe up.
Hmm. I need to see if I have a Qbus RXV21 that can
run in a 22-bit
system. Does VMS/VAX support RX02?
I'm pretty sure VMS supports it, but my only experience is with Unibus
hardware - an RX211 on a VAX-11/750. I would hope that an RXV21 works
in a Qbus VAX, but I can't speak from experience.
Or, yes, there's an RX211 driver in 2.11BSD.
Problem is getting it
*on* the Unibus box. There have been "issues".
Right. I've fiddled with 2.9BSD and gotten over some of those issues
myself. I haven't played at all with 2.11BSD - I've only recently aquired
any hardware that could handle it (KDJ11 CPU card).
And there's still no way to LL format the target
disk.
Of course. This only takes care of part of what you want to do.
I wonder what
it would take to hook a real RX02 up to modern hardware. The
interface isn't complicated, but AFAIK, it would take more than a PeeCee
parallel port to drive it. Similar to hooking up a real Commodore 1541
to a modern machine and siphoning off a physical backup...
Well, there's an interface to make the PC look like an RX02....