What I do is to remove the EPROMS, take images of them to disk and then re-burn
them. If they aren't socketed, I add turned pin sockets after removing them.
The ones that worry me aren't so much the EPROMS, but the programmable MCUs
with on board memory that are no longer available, and are one
http://www.ko4bb.com/
Regards,
David Partridge
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of David Smith
Sent: 23 October 2010 03:26
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Maintaining
On 10/23/2010 01:02 AM, Chuck Harris wrote:
I don't believe the parts are failing due to structural
problems, but rather are just leaking down their buried charge.
It should be quite possible to refresh them by erasing them and
reprogramming.
If you maintain EPROM programmers for them in
Paul, Thanks for asking, I am doing fine. Growing up in Europe after the
War I have a hard time throwing any thing away, resulting in too much stuff..
I would send it for the cost of shipping as I have done in the past for
other things.
Bert
In a message dated 10/22/2010 9:58:33 P.M.
Hi Magnus,
I keep an old Toshiba 1963 486 based laptop in good working condition
to allow me to run my old ADVIN U84 DOS based programmer. I check it
out from time-to-time.
I can't do much about the mask rom'd parts, though I don't think they
have any higher of a failure rate than any other
Hi Chuck,
On 10/23/2010 03:01 PM, Chuck Harris wrote:
Hi Magnus,
I keep an old Toshiba 1963 486 based laptop in good working condition
to allow me to run my old ADVIN U84 DOS based programmer. I check it
out from time-to-time.
I can't do much about the mask rom'd parts, though I don't think
Hi
The issue with the mask parts is the same as pretty much all IC's. The packages
aren't quite hermetic / the passivation isn't quite perfect / the top metal
goes away over time.
Bob
On Oct 23, 2010, at 9:01 AM, Chuck Harris wrote:
Hi Magnus,
I keep an old Toshiba 1963 486 based laptop
If you are going to worry about things at that level, then it is not just the
memory devices, you'll be worrying about all the programmable parts such as
PALs, GALs, and other eplds. Then you are really looking fort some exotic
programmers.
Ironically, I bought a standalone programmer many
Precicesly why I have a basement shelf or two dedicated to old datebooks. :)
On Oct 23, 2010, at 12:44 AM, Hal Murray hmur...@megapathdsl.net wrote:
___
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I make backup images of all my EPROMs and even bipolar devices. I even built a
device for reverse engineering secured PALs. I have a fully configured Data
I/O Unisite for programming. This machine with all the device adapters, etc
cost somebody well over $100,000
The Unisite is probably
On 10/23/2010 05:04 PM, bownes wrote:
If you are going to worry about things at that level, then it is not just the
memory devices, you'll be worrying about all the programmable parts such as
PALs, GALs, and other eplds. Then you are really looking fort some exotic
programmers.
Who said I
Hi
Like it or not, most of this gear is interesting to us because we knew it
when it was brand new. Either we had one or wanted one. As time marches on, the
memory of most of this gear will fade. My guess is that a lot of these
instruments will still be working fine long after anybody who's
The Advin U84 that I use will do all EPROMS, PALS, GALS, EPLD's, MACH, etc from
the
late 1970's up through the mid 1990's... it craps out when the 5V devices fell
out of
fashion, and 3.3V (and lower) became popular. The DAC's they used couldn't
supply enough
resolution on the supply pins.
I don't know if embedded images will make it through to the list, but
can someone explain the behavior indicated in this graph? This is from
an auction and it doesn't look at all like other graphs that I've seen.
It's only for a 12 min span, but others with a short span aren't similar.
If
That's KO4BB.com
Didier KO4BB
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: David Smith w...@msn.com
Sender: time-nuts-boun...@febo.com
Date: Fri, 22 Oct 2010 19:25:33
To: Discussion of precise time and frequency measurementtime-nuts@febo.com
Reply-To: Discussion of
Hi Ziggy,
On 10/23/2010 09:05 PM, Ziggy wrote:
I don't know if embedded images will make it through to the list, but
can someone explain the behavior indicated in this graph? This is from
an auction and it doesn't look at all like other graphs that I've seen.
It's only for a 12 min span, but
Hi
If you look at the fine print on the yellow graph, it's running right at the
limit of the bad temp sensor. What you are seeing is normal stepping /
averaging on the low resolution sensor.
Bob
On Oct 23, 2010, at 3:28 PM, Magnus Danielson wrote:
Hi Ziggy,
On 10/23/2010 09:05 PM, Ziggy
Backup images are fine... but has anyone considered or tried to contact the
original programmers to get the actual code used? I'm sure there wouldn't
be any reason someone would still consider 30+ year old code a trade
secret and if one had the original code... could reasonably replicate an
Hi
I've been down that road a couple of times. You get to a point where everyone
involved does indeed agree that it's not a secret anymore. Going the final
step and actually getting permission to hand out the code is often impossible.
You get into a nobody has the authority to approve that
Bob wrote:
I've been down that road a couple of times. You get to a point where
everyone involved does indeed agree that it's not a secret
anymore. Going the final step and actually getting permission to
hand out the code is often impossible. You get into a nobody has
the authority to
Heathkid wrote:
Backup images are fine... but has anyone considered or tried to contact
the original programmers to get the actual code used? I'm sure there
wouldn't be any reason someone would still consider 30+ year old code a
trade secret and if one had the original code... could
Very true, except it's more like 5-10 years.
-John
==
Bob wrote:
I've been down that road a couple of times. You get to a point where
everyone involved does indeed agree that it's not a secret
anymore. Going the final step and actually getting permission to
hand out the code is
True.
I've been in warehouses with hundreds of rows of shelves of Bankers Boxes
filled with records. I doubt the stuff is even indexed.
-John
==
Heathkid wrote:
Backup images are fine... but has anyone considered or tried to contact
the original programmers to get the actual
I did note that it was the temp sensor, but the behavior was clearly
different. I guess my earlier search terms weren't good enough to reveal
this info about the sensor differences in the T'bolts. I've done some
further digging and now have the scoop on these DS1620 changes, etc.
Other than
J. Forster wrote:
True.
I've been in warehouses with hundreds of rows of shelves of Bankers Boxes
filled with records. I doubt the stuff is even indexed.
Yep.. You get to the end of your phase of the project. You've got file
cabinets and shelves full of stuff, most junk, but some useful, as
In a message dated 22/10/2010 14:09:13 GMT Daylight Time,
luciano.paramithio...@hp.com writes:
I bought a distribution amplifier Rapco model 1882M-2 auto changeover on
ebay. This distribution amplifier was intended to be used in conjunction
with a GPSDO to distribute 5MHz and 1PPS.
It
The bad temperature sensors can have a rather dramatic effect on the tbolt
output, particularly if you are even remotely time-nutty. Their disciplining
algorithm seems to use it as a rather important number.
And the bad sensor is rather useless if you are trying to use Lady Heather to
Keep in mind that most programmers made in the last 25 years are microprocessor
controlled, with their own firmware, so while you are at it, you might as well
back those up too, but if it's your only programmer, you are stuck...
Didier
Sent from my Verizon Wireless BlackBerry
-Original
They are required to keep it by law, and they will get paid to look for stuff,
if anyone (most likely the government of a court) wants them to, so I am not
sure why they should spend their own money to make that task easy...
Didier
Sent from my Verizon Wireless BlackBerry
-Original
shali...@gmail.com wrote:
They are required to keep it by law, and they will get paid to look for stuff,
if anyone (most likely the government of a court) wants them to, so I am not
sure why they should spend their own money to make that task easy...
Didier
Bankers Box is a brand name for
On Sat, Oct 23, 2010 at 02:44:51PM -0700, J. Forster wrote:
Very true, except it's more like 5-10 years.
These days John is absolutely right... likely none of the
developers, none of the equipment, perhaps not even the corporate
shell of the division or department that designed the
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