--- CLASSICCMP(a)trailing-edge.com wrote:
> > But I have no idea how big this 11/70 would be?
>
> A couple of points:
>
> 1. The 11/70 CPU itself weighs 400-500 pounds, in its cabinet with
> power supplies. Several fairly hefty guys can roll a CPU around
> and tip it into a trailer, for example. (Hi Elmo!)
It's lots of fun, trust me.
> 3. Memory boxes weigh about 80-100 pounds each. A fully equipped
> system with core memory boxes (2 Mwords of core) requires 8 memory
> boxes. Solid state memory is more dense, and depending on exactly which
> generation of memory boards you might only need two memory boxes
> for a usable configuration.
Mine have a single BA-11-sized box with 16 256K boards (full of 4116
chips) in a second cabinet.
> And Massbus disk drives (as were mentioned in the original post)
> are the size of a washing machine and weigh several hundred pounds.
> You'll need at least two disk drives for any real usage.
I've got Systems Industries SI-9900 controllers (5" x 19" x 30") and
Fuji Eagles. One short cab is enough to hold 800Mb - 1.2Gb.
Real DEC RM03's are 67Mb and the same volume.
-ethan
=====
Infinet has been sold. The domain is going away in February.
Please send all replies to
erd(a)iname.com
__________________________________________________
Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com
In case you missed it, it sold for 109.50. I bid on it
but didn't win. Before the auction, I was hoping that
nobody would show up at the VCF with a stack of them
for sale. Now I hope somebody does...
Howdy,
This is sort of specific to Houston, so everyone else can delete now.
I have a friend who is need of a 19" rack. Doesn't have to be anything
fancy, just a good sturdy rack. Where would be the best place to
find/scrounge/whatever one of these beasts? (without calling rittal
and paying big bucks)
Any hints appreciated.
Kelly
KFergason(a)aol.com
--- allisonp(a)world.std.com wrote:
> But vr201 is not NSTC timing or scan rates.
Sure it is. I'm driving this one from an Amiga 2000, right off the mono RCA
jack on the back. I made a cable with a DB-15 connector for the VR-201 end
and an RCA jack and HDD power socket for the Amiga end. I fire up the Amiga
to see the animation of the kickstart disk self-inserting.
> No way. It's not the 30hz in frequency it's the serperate sync and
> different front and back porch timing.
Front and back porch timing I can perhaps see. There is no seperate sync
on a VR201. It has a pin for Mono Composite In. I'd post the pin-out, but
it's at home and I'm not.
> It's a misapplication, Vr201 is not a generic monitor.
I realize that the VR-201 is not generic, but it is handy when I need a
mono monitor in a semi-portable situation (I once took my A2000 in the
Bomac tower case to an Amiga show in Columbus and ran it with this VR-201
to save space)
-ethan
=====
Infinet has been sold. The domain is going away in February.
Please send all replies to
erd(a)iname.com
__________________________________________________
Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com
>Didn't check the MicroPDP-11 book on this one. All the 11/53 boxes I've
>seen either had 11/23B or the earlier no ram-nonPMI 11/73 cpu in them.
Well, then, none of those were actually 11/53's :-).
It reminds me of the folks who have a MicroVAX system living inside
a BA23 or BA123 with the "Micro PDP-11" badge on front of it. The
badge doesn't mean a damn thing, it's what is living in the box
that counts!
Tim.
>Before I forget, last week I saw a BA213 with a M9405 and three M9047
>in it.
M9047's are grant continuity cards (no circuitry, just PC boards
with pins on the edge connector jumpered together to pass interrupt
and DMA signals to the next slot.)
A M9405 is a Q22-bus cable connector. This is what you use to hook
multiple Q-bus chassis together into a multi-box system. On the
other end of the cable you need a M9404.
For information on connecting multiple Q-bus systems together, telling
you which variants on the M9405 and M9404 cards you'll need for specific
CPU/backplane combinations, see Micronote 29, "Q-bus Expansion Concepts", at
http://metalab.unc.edu/pub/academic/computer-science/history/pdp-11/microno…
> The module database at <http://www.neurotica.com/dec-info/>
>is down, it appears, and I can't find another link like it right now.
You want the "Field Guide to Q-bus and Unibus Modules", at
http://metalab.unc.edu/pub/academic/computer-science/history/pdp-11/hardwar…
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
> But I have no idea how big this 11/70 would be?
A couple of points:
1. The 11/70 CPU itself weighs 400-500 pounds, in its cabinet with
power supplies. Several fairly hefty guys can roll a CPU around
and tip it into a trailer, for example. (Hi Elmo!)
2. An 11/70 by itself is pretty much useless. There's no memory
inside the CPU box (in a "conventional" configuration) and there's
no peripherals either.
3. Memory boxes weigh about 80-100 pounds each. A fully equipped
system with core memory boxes (2 Mwords of core) requires 8 memory
boxes. Solid state memory is more dense, and depending on exactly which
generation of memory boards you might only need two memory boxes
for a usable configuration.
4. Now you need peripherals. You'll almost certainly need a
BA11 Unibus box tacked onto the CPU, this is another 70-80 pounds.
And Massbus disk drives (as were mentioned in the original post)
are the size of a washing machine and weigh several hundred pounds.
You'll need at least two disk drives for any real usage.
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
Got an urge to go to a thrift I haven't been to in a while and found
what was labeled as a 3270 PC. Brought it home and opened it
up. Looking at the boards inside I'd guess it was a 3270 PC as the
label said. No keyboard or monitor. I'm guessing it used different
ones than the normal PC. It has a hard disk, but have to pull it to
see what type first and 2 half height 5.25" floppies. Not sure what
software is on the drive. Anyone tell me anything else about this?
Such as where to locate a keyboard and monitor, what each of the
boards might be, etc. I can go into some detail on the cards if
need be. Half appear to be normal drive controllers and serial port,
etc. Then there is one with a BNC connector and two others that
have a small jumper board between them. Should I even keep it?
Hmmmm....
Thanks.
-----
David Williams - Computer Packrat
dlw(a)trailingedge.com
http://www.trailingedge.com
On Sep 23, 23:17, Allison J Parent wrote:
> Subject: Re: PDP 11/70s For Sale
> <Which series is most compact (sized for desktop or tower style) pdp
>
> An 11/53 thats a 11/23 cpu in a BA23 box. About 6Wx28Hx30D and an easy
> 110v outlet. With a RD52(30mb) and a RX50 floppy you can run most any
> PDP11 OS including unix (starting with 2.9 or 2.11).
No, an 11/53 isn't an 11/23, it uses a J-11 on a board which also includes
the RAM (typically 1.5MB) and its performance is more like an 11/73 than an
11/23. You'd need BSD 2.11 to have any hope of MSCP support for RDxx or
RX50.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
> Huh? Is the CPU chip on an 11/53 card an F-11? If so, is it the same
All the ones I've seen. Either F11 11/23b or it can have the early J11
either on a quad width no ram board with one or two serial lines.
> IIRC, there is no MSCP support in 2.9. I have it (from waaay back, not
> via PUPS) and ISTR having to load it onto RL drives, RK drives or RP
> drives (or third-party XP (SMD) drives). I forget about 2.10BSD. I'm
> certain that 2.11BSD supports MSCP, but might not be so happy on an 11/23
> unless you've got at least 1 Meg.
I knew it was either 2.9 or 2.11 that could run MSCP I just couldn't
remember which or both. I run V7 with RL02 so what do I know. ;)
Allison
