On 2/12/07, Ethan Dicks <ethan.dicks at gmail.com> wrote:
> On 2/11/07, Brent Hilpert <hilpert at cs.ubc.ca> wrote:
> > Ethan Dicks wrote:
> > > Had a good day at the Mansfield Hamfest today. I now have [a]...
> > > nixie-tube panel DVM...
> > ^^^^^^^^^^^^^^^^^^^^
>
> > If that is a Weston 1294-series DVM (4.5 digits, TTL, fits standard 4"*1.75"
> > industrial instr. panel), I can supply the schematic.
>
> It _is_ 4.5 digits... and does fit a standard panel opening, but
> it's an MDPM-3 by Instrument Displays, Inc., of Haverhill, Massachusetts.
OK... I've taken it apart to have a look... the IC dates are late 1968
- there are a few DIPs and a number of 8-pin epoxy-covered
button-shaped ICs all over the innards. The DPM came with a 36-pin
AMP connector with 4 wires loaded, two for power and two for input
voltage. The power wires go right into a transformer at the back of
the unit, leading me to suspect that it takes 110VAC, but perhaps it
takes 24VAC. I have not yet powered it up - does anyone have any idea
what it would take to fire it up?
The nixie tubes, for those who track such things, are 3 Burroughs
B-5750 7/8"(?) nixies, with a block next to them for "1", "+", and "-"
(3 individual neons). The legend on the front proclaims it to be a
"mini-diget dpm".
I've never fiddled with a pre-LED DPM, so if anyone knows what voltage
it's expecting, I can fire it up to see if it works or is merely a
source of nixies.
Thanks,
-ethan
---------Original Message:
Message: 11
Date: Tue, 13 Feb 2007 19:31:14 +0000
From: Philip Pemberton <classiccmp at philpem.me.uk>
Subject: Re: WTD: Fuse PROM programming algorithms
<snip>
TI are nice enough to put their programming algorithms online, I've found a textual
description of the NatSemi algorithm (though it would be nice to have the
timing diagrams, if any), and I tracked down an old rev of the 82S129
datasheet that includes some info on the Signetics Generic I algorithm. Those
three would be enough to get by on for now, but it would be nice to have read
and write support for e.g. the Intersil and Monolithic Memories chips.
As dictated by Sod's Law, I've got the Intersil linear databooks, but not the
logic/PROM/whatever databook. As far as MMI goes, I can't even find a copy of
the relevant databook for sale, hence why I asked for scans or photocopies
(I'm not fussy about which, and I'm willing to pay for the copying and
shipping/postage).
Thanks.
--
Phil
-----------Reply:
If you don't find 'em elsewhere, I've got Harris ('78), Intel ('76), Signetics ('78)
and National ('77) databooks in front of me. Don't know about Intersil; was looking
in the MMI book a while back, but now I can't remember where I put it down at the
time (probably the same place as the cordless phone ;).
mike
--- der Mouse <mouse at rodents.montreal.qc.ca> wrote:
> > [...] be advised that acetone will also (in my
> experience) turn some
> > plastics into grainy mush, [...]
>
> Well, I did first try applying acetone to a
> noncritical area of the
> same part, to see what it would do.
>
Yes, acetone also disolves polystyrene.
Some uni/college student visited the lab where
I work (I'm a technician, not a chemist, and
my chemical knowledge is limited other than
what I have learnt at work over the last 8
years) a few years ago and decided to clean
the runners on the plastic slidey doors (do they
have a proper name?) on the side of one of
the balances.
Naturally, as someone else mentioned, the
acetone turned the plastic into mush and
the door become tough to open, often sticking,
instead of being smooth and easy.
Generally, we use acetone to clean marker pen
off of glass equipment (eg. volumetric flasks)
and for cleaning oil/grease out of the metal
cups (we test for fat/oil/grease content in the
waste water from factories that send there
waste into our* sewers)
Getting it back on topic... is there an easy
was to determine which computers/peripherals
can be cleaned safely with acetone, or similar
substances?
Regards,
Andrew D. Burton
aliensrcooluk at yahoo.co.uk
* I work for a well known UK water company, mainly b
ased in East Anglia.
M H Stein wrote:
Do have a few manuals on other plotters. Recently found one on a Houston
Instruments plotter. It'll go to Al the next time we get together.
Billy
==Mike's Reply:
Which Houston plotter? 595/695 ?
mike
--------------------
Don't know. It is up in Pleasanton in a big pile of stuff for Al, next time
I see him. I'm going up on the 24th, so I'll try to have a look then. I
just buy stuff like this manual when I come across them at flea markets,
etc. Give them to Al for his archives.
Billy
> I know Al and a few other people have setups for digitizing the analog
> outputs of the read heads for 7-track and 9-track magtapes, but has
> anyone concocted a similar beast for the DC100 or QIC tapes?
>
> Is it even possible?
Yes, it is probably what I'm going to have to use to recover
the Tektronix 4051 tapes that I got from Jim Willing.
It shouldn't be to difficult to do something similar with heads
that don't move (HP, Apple Tape Backup, etc). Fiddling with the
firmware for QIC drives with serpentine recording is more difficult
Would be a PA8E1
Seagate changed the part numbers when they took over
the product line.
I don't think it has a manual head lock
Have a manual scanned, will get it on line.
Hi,
I'm currently looking for information on programming algorithms for the old
fuse-link PROMs (Signetics 82S series, AMD 27S series, National Semiconductor
74S series, TI 18S series, Harris/Intersil 7000 series, Fujitsu 7000 series
and MMI 6000 series). Does anyone here have copies of the memory product
databooks from any of these manufacturers?
I've got the Signetics Generic I algorithm (but not Generic II), and part
of the NatSemi algorithm (text only, no timing diagrams), and nothing at all
for the others.
Main reason I'm asking is because I'm designing a programmer to do the 82S
series, and I'd like to make it as universal as possible - i.e. if possible,
I'd like it to be able to read and program the other chips too.
I'm willing to pay for photocopies of datasheets, or the entire databooks
if you'd rather sell the book itself.
Thanks.
--
Phil. | (\_/) This is Bunny. Copy and paste Bunny
classiccmp at philpem.me.uk | (='.'=) into your signature to help him gain
http://www.philpem.me.uk/ | (")_(") world domination.
I'm preparing to have several 8" sealed HDA SMD drives shipped to me.
They're what Prime called a model 4735 496 MB drive, and CDC called
(I think) a 9720-500.
If the manual is on Bitsavers, I don't know what it looks like.
Is there a shipping lock on the heads of these drives? How to set it?
Thanks,
De
---------------Original Messages:
Message: 23
Date: Tue, 13 Feb 2007 12:20:55 -0800
From: "Billy Pettit" <Billy.Pettit at wdc.com>
Subject: pen plotters?
Richard wrote:
As difficult as it is to find information on vintage terminals, its
even harder to find information on vintage pen plotters. A pen
plotter was about the only form of graphical output you could expect
to see on a vintage graphics system as film recorders were very
expensive.
OK, what do you have in your collection(s)?
---------------------------------------
==Mike's Reply:
HP7475A
CGP-115
=================
Do have a few manuals on other plotters. Recently found one on a Houston
Instruments plotter. It'll go to Al the next time we get together.
Billy
==Mike's Reply:
Which Houston plotter? 595/695 ?
mike