On Sun, Jun 21, 2009 at 7:51 PM, steve shumaker <shumaker at att.net> wrote:
photos are loaded at <http://picasaweb.google.com/traveler8811>
Nice.
>> Not sure how much of a score it is but I'm
now the owner of what was described as a fully functioning pdp11/03. ? This would be my
first pdp unit
>>
>> Cards installed are:
>> Cards are:
>> M8059KJ
>> M8186
>> M8639
>> M8028
That would explain why I wasn't finding in any of
the cards associated with the 11/03. ? So this unit was
significantly upgraded in some fashion?
None of those boards are from the PDP-11/03 era, except perhaps the
DLV-11F (M8028). It's pretty much had a total makeover.
Date stamps on the 8059 and 8186 are jan 1985. ?most
other stamps are 1980... ?the unit was supposedly pulled from the internal network of the
Borden Chemical Co but there are CompuServe inventory stickers on the boards.
Interesting (I have plenty of stuff from CompuServe, and my 11/70s
came from Borden). Are you in Columbus, or did you just get the
equipment from Columbus (however indirectly)?
> I've
done the obvious thing on bitsavers but whats a good place to start exploring with this
unit? ? There's no drives or console with it although there is a large ribbon cable
attached ?to the M8639 card. ?It also has a serial cable so one MIGHT be able to connect a
console to it...
The cable terminates in a DB50female connector and the "console" cable
terminates in 4 wires into a bare db25male connector
From what I can see in the pictures, your console cable
is the DB25
that attaches to the M8028 via the thin cable and the 40-pin BERG
connector. The ribbon cable that goes into your RQDX1 that has the
DD50P connector on it, probably went to an external disk box. I have
one or two - they are the same enclosure as an external TK50,
sometimes called a Leprechaun box, but depending on what was meant to
go inside, there were different backpanel boards for the purpose. One
such board exists for an external MFM drive over a single 50-pin
cable. That's probably what originally attached to your machine.
As has been hashed over on the list recently, all RQDXn controllers
use the same 50-pin pinout to provide signals for floppy and disk.
How many and what type depend on your cabling and the model (revision)
of your controller.
I saw that Dave McGuire offered you a BDV-11 and an RQDX3. You'll
probably want those. One hassle with the RQDX1 is that it doesn't
pass grant and has to be the last card in the system. The RQDX3 won't
have that limitation. It's meant to be near last (which makes the
cabling in a BA23 easy), but it will work in other places. The BDV-11
will give you boot ROMs and terminate your bus (the other termination
is on the CPU). In a BA23, IIRC, the bus is terminated on the
backplane itself, so you don't need a BDV-11 there.
Depending on what ROMs are on the BDV11, you might want to explore
burning new ones. I don't recall if the MSCP bootstrap (DU device) is
there or not - probably it depends on how old the BDV11 is. Mostly,
I use them with controllers like the RLV12, so I know that works fine.
It shouldn't be difficult to get you up and running on 5.25" floppies
or a smallish MFM hard disk. With the CPU and memory you have there,
I'd recommend RT-11. 2.11BSD won't run on that CPU (no Split I+D
space), and 2.9BSD won't really be happy with that little RAM. RT-11
will work great with 64Kw (your M8059 card), and work fine on 5.25"
floppy or small hard disk.
You will probably be able to use an RX33 floppy with whatever RQDX3
that Dave sends you. With your RQDX1 (and the same cables), I think
you are stuck with the RX50. One advantage the RX50 has is that it's
two slots (one positioner), so you can boot from one diskette and swap
out the other. The disadvantage is that they are weird, and if you
don't already have one, you might not want to mess with them. The
RX33 is a standard Teac FD55GFR as seen in many PCs of the 286 and 386
era, with certain jumpers set a certain way to make the motors and
lights and select work in the expected fashion. The drive itself,
though, is identical to the one in PCs. There are setup instruction
on the 'net that aren't hard to find (or at least weren't the last
time I looked).
I hope this info helps you sort out the hardware you have in front of you.
-ethan