Hi, all.
I've been trying to build a kernel with TCP/IP & DEQNA support for the
PDP-11/93. After reassigning some of the overlay inclusions, the kernel
builds OK, and will boot, up to looking for the root filesystem. The
boot fails with an error that there's no root fs at major, minor (5,0).
I've verified that my root filesystem is indeed at that device. I
can't figure out where I'm hosing the build.
Any suggestions? I'll probably be going to RT-11 as soon as Mentec
clears the hobbyist licensing, but I'd like to leave triumphant....
Plus, I promised a friend a login on A Real PDP-11.
Doc
On May 9, 7:24, Robert Schaefer wrote:
> D' you think a hairdryer would work? :)
Probably not hot enough ;-)
> Ok, seriously, any problems with
> existing parts coming unstuck and getting blown around? Or is the nozzle
> tight enough that other chips usually don't get hot enough?
It depends on the nozzle, the temperature, and the technique. If you do
one chip at a time, get the temperature right, and don't take too long, I'd
guess you'd only melt the solder on the adjacent side of the adjacent chip,
and it shouldn't move. I'd use a good quality low-temperature rework
solder to minimise the risk. However, I'm not an expert, and maybe I've
just been lucky.
--
Pete Peter Turnbull
Network Manager
University of York
>Got a pile of the VMS fishies around here somewhere, but it would be
>illegal to violate DECs copyright and trade secrets in such a fashion.
>Even worse would be to admit to planning such a violation on an
>archived mailing list.
Good to see you're likely to be around long enough
to get to operate that machine :-)
Anyway, the OpenVMS listings are available on
CD (at least from the V5.5-ish era onwards).
(And the fiche is source listings, *not* sources).
Someone from OpenVMS engineering commented
(some time ago) in comp.os.vms that he was
trying to get copies of the V1/V2/V3/V4 listings
onto CD. No word on whether these would be
made available (a la freeware) but it seems
pointless scanning something that is known
to exist electronically when there is
so much other stuff on fiche that is
not available online.
My vote is 400dpi in PDF (or TIFF, but viewers don't
seem to be so flexible for that ). Should be a nice stack
of CDs if you manage to scan 4 linear feet of fiche!
I suspect that indexing it (i.e. collecting manual#1,
manual#2, manual#3 etc. into individual files) may
well take you some time!
Can you estimate how many pages of fiche four
linear feet actually is? How many manual pages
(assuming "full" fiche sheets) does that translate
to? At 300dpi, an A4/Letter page turns out to
be maybe 50-70KB; at 600 dpi I usually find that
the PDFs turn out at 200-250KB per page. That
should allow you to roughly estimate the
amount of data you are likely to produce.
Antonio
Microfiche trivia, my memory may be rusty
The sample microfiche I have retrieved are 4" high by 6" wide. There are
varying numbers of images placed on them. The layout of the images
indicates what magnification of the originals was used. The ones I have are
12 columns of images across by 6 rows of images down. Of the 8 microfiche
readers I have recently examined most are the 24X units. Some are dual 24X
and 48X. There are supposed to be a 72X but I haven't ever seen one.
I have examined a sample microfiche under an old microscope, vintage 1950,
and used several different magnifications.
Car parts listings are a typical usage of microfiche.
Some microfiche were designed to be COM (Computer Output Microfiche), the
images are landscape.
On my sample microfiche each minified image is about 1/2" by 3/4".
If you figure that on the 8 wide paper it takes 150dpi to accurately sample
the original page. There are therefore 1200 useful dots reduced into 1/2".
and then you need to scan the microfiche image at about 2400dpi to get an
accurate reproduction.
I'm trying a Nikon scanner at 1200dpi as an experiment, the main problem is
getting enough light through the microfiche.
YMMV
Thanks
Mike
Folks, after my last reply to Jay, I see I'm going to need to be absent
for a while. I'm busy with a lot of other stuff anyway. I will leave it
to him to work out how the list is to be run, and I hope everyone else
will, too. I just had to make my position clear, but I see it's going to
make it difficult for the list if I stick around. No hard feelings
towards him or anyone else.
Ya'll be good.
later,
jbdigriz
Owen
I seem to remember there is a receive only DECwriter that we used as a data
logger at one time.
This may be a pointer to more information
http://telnet.hu/hamster/pdp-11/periferia.html
Thanks
Mike McFadden
>Date: Wed, 08 May 2002 12:41:32 -0500
>From: Owen Robertson <univac2(a)earthlink.net>
>Subject: What is it?
>http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2022409053
>Anyone know what this is? Looks like a DECwriter with only numeric keys.
OK, since I have no available user manual, and google seems to be less
than helpful on this subject, can anyone tell me what each port on the
back of my Altos 580 and 8000 is?
For the 580, I've got figured out that JA is for a parallel printer, JB&JD
are RS-232 and JC is the RS-232 console. What is JE?
For the 8000, I've noticed that JU-JZ seem to be RS-232 with JX the
console. What is everthign else?
Does anyone have pinouts for ports that aren't 'standard' like RS-232
ports?
Thanks for the help
-- Pat
Well, my latest toy is here, but it looks like I screwed up a little when I
picked up an IRIX CD for it. I got 'IRIX 5.3 for Indy R4400 175MHz', but
according to http://sgistuff.g-lenerz.de/ this version is Indy-specific-- I
need the plain vanilla 5.3 CD, or 5.3 XFS. Anyone have one to trade? Or
maybe even 4.x?
Also, if anyone has a source for 8MB simms, keyboards, and mice I'd be
interested.
Thanks!
Bob
I went to a surplus store today and found the following items which may (or
may not) be of interest to any listmembers. If anyone wants any of it, let
me know off-list.
Krown Research Porta-Printer II. This is a small keyboard, an accoustic
coupler on the back, and a calculator-style 2.5" printing tape in the
center. Think TI Silent700, that's kinda what it looks like except smaller
and with the tape role. In a nice hardshell carrycase. Marked at $40.00.
HP7045A X-Y Plotter - this isn't a "modern" plotter, looks pretty old
technology-wise but fair condition. No price.
Three 8" monitors, GBC brand with large (F-type??) 75ohm connectors, marked
at $25.00 each.
HP7550 plotter, looks to be in excellent shape, marked at $45.00
Two SyQuest "88MB C" 5.25 bare drives, no price.
Noticed a scrap card that had a 8080AFC chip on it, $3.00.
No clue what this is - DEC H343-A IEEE bus adapter with a few HP-IB cables,
marked at $15.00.
Alas - the TI3100 notebook computers with plasma displays are all gone :\
Regards,
Jay West
> From: Corda Albert J DLVA <CordaAJ(a)nswc.navy.mil>
> To: "'classiccmp(a)classiccmp.org'" <classiccmp(a)classiccmp.org>
> Subject: RE: Tae Rings?
> Date: Wed, 8 May 2002 16:28:02 -0400
>
> They are 9-track tape write-enable rings. They fit into a groove
> around the hub-hole of 9-track tapes. At one time, these used to
> be all over the place. Since the demise of 9-track tapes as a
> common media, they seem to have become scarce. Shurely someone
> needs some? (I could use a few, but not a whole lot...:)
>
> -al-
> -acorda(a)1bigred.com
>
>
> > -----Original Message-----
> > From: Chris [mailto:mythtech@mac.com]
> > Sent: Wednesday, May 08, 2002 4:15 PM
> > To: Classic Computer
> > Subject: Tae Rings?
> >
> >
> > Does anyone know what these are for?
> > <http://www.mythtech.net/rings.jpg>
> > Excuse the 2d scan, my digital camera is at home, so I just tossed
> > them on my flatbed scanner for the pic.
> >
> > I think they are rings for the tapes used on my old Zebra system
> > (IIRC, it had some reel like tape canisters that fit in the top of
> > it, but this is going WAY back).
> >
> > I have about 2 dozen of the yellow ones, and 5 or 6 of the orange ones
> > (although not all orange, some are white/clear).
The yellow are write rings, as pointed out. The orange or white ones
are stacking rings, used to stabilize bunches of tape reels when they
are shipped in a cardboard box. Putting a stacking ring between each
pair of tape reels keeps them from sliding around parallel to one another.
carl
--
carl lowenstein marine physical lab u.c. san diego
clowenstein(a)ucsd.edu
