What is it? I'm guessing its some kind of disk controller. Does
anyone have specifics?
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<http://pilgrimage.scene.org>
I wont say exactly for what, but I have in my
possession about a dozen brand new crts for a popular
old puter. It was a lucky and unusual find. Not for
sale at this time. Sorry. Having said that, I would
like to acquire some 9-13 inch new color crts for *far
distant* future projects. They need to be high-res
computer grade capable of displaying 3-475 lines of
res (is that even a function of the tube?). Grassyazz
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> Pending pick up.
>
>
> ---------------------------------
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> Ontopically, I was thinking learning Forth was going to be my next big
> project, but I'm debating that some more and I think my free time will go a
> different direction; mainly getting back into 6809 assembly.
>
> Laterz,
> Roger "Merch" Merchberger
Good choice :-)
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>From: "Gordon JC Pearce" <gordonjcp at gjcp.net>
>
>Philip Pemberton wrote:
>> In message <3.0.6.16.20060127101019.441734dc at pop-server.cfl.rr.com>
>> "Joe R." <rigdonj at cfl.rr.com> wrote:
>>
>>
>>> You'd probaly better with battery backed RAM that would lose it power
>>>(and contents) when it was removed from the circuit. Or else redisign and
>>>use a PAL or some form or programmable logic that has a security fuse to
>>>prevent it from being read.
>>
>>
>> Problem is, SRAM has this annoying tendency of storing data for a really long
>> time if it's frozen beforehand.
>> It also tends to "remember" data bits that have been stored in the memory
>> cells without any writes for a long time.
>
>That's why the encryption cards banks use for ATMs detect when they get
>below a certain temperature, and overwrite the RAM.
>
>Gordon
Hi
Often times the newer SRAM use SOI technology. These tend
to power on with the opposite value that they were programmed
with. The data looks scrambled but just inverting the values
will recover a large percentage.
Dwight
My LA120 is the -AA model but I'd like to see it "upgraded" to include
the numeric keypad on the right hand side.
Does anyone know if this is possible?
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Pilgrimage: Utah's annual demoparty
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So, what's a good way to roughly approximate the "value", especially if it's the sort of thing that is in the "cool, but I've never seen one before" category? I assume for scrappers that don't do parts sales it would be a weight thing? What do some of you regulars offer?
(My brother in law works for a scrapper/recycler, I thought it was PCs/printers, but one day he was over at dinner talking about pulling out these "huge disk drives and modems" I thought I'd see if I could talk them out of some bits . . .)
what about asics, fplds, fpgar, vlsis (the latter
being of most interest to me), etc. etc. etc. Can
those be readily reverse engineered. Say you had a
*bad* vlsi, and a block diagram of its innards. Could
the *details* be worked out, and would it be feasible
to reproduce it as an fpga?
--- cctech-bounces at classiccmp.org
<ard at p850ug1.demon.co.uk> wrote:
> > (and contents) when it was removed from the
circuit. Or else redisign and
> > use a PAL or some form or programmable logic that
has a security fuse to
> > prevent it from being read.
>
> Oh come on. PALs are about as secure as a cardboard
front door.
>
> If you're going to allow unpackaging the chip, then
remember that PAls
> used the old fusible-link technology. And those
links will be in the top
> metalisation layer. You could see which ones were
intact and which were
> blown with a microscope. And I guess if you could
open up a new example
> of the same make and type of PAL without damaging
it, you could blow the
> links one at a time and keep on looking at the chip
to work out which was
> which.
>
> But why go to all that trouble? Even if the security
fuse is blown, it's
> possible to reverse-engineer a PAL using well-known
techniques of
> applying various inputs and looking at the outputs.
With a PAL there is
> no way to have a hidden variable. Any flip-flop in
the chip (wether part
> of thr 'R' of a registered PAL, or made from the
AND/OR matrix) will
> appear on one of the pins (this is not true of GALs,
unfortunately). So
> with a PAL it's relatively easy to work out what's
going on.
>
> -tony
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>What is it? I'm guessing its some kind of disk controller. Does
>anyone have specifics?
>
PDP-11 disk controller for DSD 8" floppy drives.
http://www.bitsavers.org/pdf/dsd/
Philip Pemberton wrote:
> 404.
> The pages on s100-manuals.com actually link to
> s100-manuals.net for the UCSD Pascal stuff...
My mistake. I downloaded my copy last June.
Another good source for P-system stuff is
http://www.threedee.com/jcm/psystem/
--
Paul R. Santa-Maria
Monroe, Michigan USA
From the KB9Q Newsletter, 1/27/2006 edition:
FREE TO A GOOD HOME...
Teletype equipment... A model 28 ASR with lots of bells and whistles, a
model 14, and tape reader, plus various other pieces of teletype related
items...
Contact John, KB9PBM 262-781-5196 {home} ... 262-470-5196{cell}
I doubt he will ship. This would be Waukesha county, Southeastern
Wisconsin, most likely. I don't know this fellow personally but I thought
someone who is interested in this gear should know about it, because he's
already stated he will toss the stuff in the dumpster if no one expresses
interest.
-T
[Philosophy] There is nothing that somebody, somewhere, will not
consider immoral. --Jan.Six at uku.fi
--... ...-- -.. . -. ----. --.- --.- -...
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43? 7' 17.2" N by 88? 6' 28.9" W, Elevation 815', Grid Square EN53wc
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