15 Nov
2010
15 Nov
'10
8:47 a.m.
>> Check out ebay auction 190467284114 and you
can clearly see there are
>> DIP64
>> MC68000 CPUs going to the scrapper bin.
>> This is painful to see especially knowing the S-100 68K CPU board is
>> entering build and test. I know builders will be looking for these parts
>> soon.
>> The DIP64 68000 CPUs are still available though this seems like such a
>> waste
>> to scrap classic ICs. I think it is tragic.
> Andrew, Am I wrong, or the 68000 IC is a **very
common** microprocessor?
> :oO
They could easily be sold for much more than the value
of the metal
recovery. eBay has them going for $8 to $50 or more each. Also amateur
gold scrappers have a nasty habit of making a mess with their chemical
waste.
E-bay pricing can be bizarre and I would argue is not always
representative of the "real world". Jameco lists
Ceramic DIP64 68000 (pulls almost certainly) for $9.95 and
I would expect them to work.
Jameco used to have early dynamic DRAM's and shift registers
By the metric buttload (e.g. 1103's, 2504's) presumably pulls but
In other cases maybe a little closer to "floor sweepings for hobbyists".
Having worked with 1103's I would argue that by modern standards
Even the "cream of the crop" were little above floor sweepings.
Tim.
15 Nov
15 Nov
11:03 a.m.
From: tshoppa at wmata.com
E-bay pricing can be bizarre and I would argue is not always
representative of the "real world". Jameco lists
Ceramic DIP64 68000 (pulls almost certainly) for $9.95 and
I would expect them to work.
Jameco used to have early dynamic DRAM's and shift registers
By the metric buttload (e.g. 1103's, 2504's) presumably pulls but
In other cases maybe a little closer to "floor sweepings for hobbyists".
Having worked with 1103's I would argue that by modern standards
Even the "cream of the crop" were little above floor sweepings.
Tim.
Hi Tim
I was once buying some 2114s from Jameco and got a bad
batch. I contacted them and they told me how they work.
First, if it is known to be pulls, they state that up front.
Most of the older chips are from stock rooms of companies
that are clearing older stock or have gone out of business.
As such, the parts are untested. They could have been bad
parts from a production line that someone was collecting
or just some NOS. They have no way to test them.
They were quite nice about replacing bad one. If it didn't
work, they replaced them without other questions.
I doubt any of the sellers of 'out of production' parts do any
better so I continue to do business with them when they
have parts I'm looking for. For mail order, they are easy
to deal with.
I am close enough to them that I can do will-call but
mostly just have stuff shipped. I've gotten wrong parts
and they will replace them as well. Like any large where
house, things do often get mixed up and the guys that
pulls the parts often wouldn't know a transistor from a resistor.
Smaller operations can be better but these guys are not a
one person company.
Dwight
4:48 p.m.
New subject: 1103s
Having worked with 1103's I would argue that by
modern standards
Even the "cream of the crop" were little above floor sweepings.
Was it that a lot of new 1103s were DOA, oe what there a problem with
them fialing in use, or what?
The reason I ask is that I have several old HP calculators full of 1103s,
and AFAIK all are original (and gettign on for 40 years old). So far,
otuch wood, I've not had any problems with the RAM in these machines.
-tony
10:42 p.m.
New subject: 1103s
On Monday (11/15/2010 at 09:48PM +0000), Tony Duell wrote:
I was just reading about 1103's in The History of the Advanced Scientific
Computer (aka, TI ASC), here,
http://www.textfiles.com/bitsavers/pdf/ti/asc/ASC_History_May84.pdf
page 9,
There was strong evidence that semiconductor memory would
replace all other forms of memory then in use. Thus, a project
was set up under George Quimby to investigate memory alternatives
(Appendix G). Two memories were finally developed, high speed
bipolar main memory (first installed in May 1972), and a lower
speed MOS attached memory (first installed in mid 1972).
We were one of the earliest users of the 1K Intel 1103 device.
We had a contract with a firm in Canada who had government
money to get into the semiconductor business and had an agreement
with Intel to produce the 1103. I remember this firm never made
it and folded in the mid 70's.
--
Chris Elmquist
Having worked
with 1103's I would argue that by modern standards
Even the "cream of the crop" were little above floor sweepings.
Was it that a lot of new 1103s were DOA, oe what there a problem with
them fialing in use, or what?
The reason I ask is that I have several old HP calculators full of 1103s,
and AFAIK all are original (and gettign on for 40 years old). So far,
otuch wood, I've not had any problems with the RAM in these machines. 
16 Nov
16 Nov
3:21 a.m.
New subject: 1103s
On 2010 Nov 15, at 7:42 PM, Chris Elmquist wrote:
On Monday (11/15/2010 at 09:48PM +0000), Tony Duell
wrote:
I was just reading about 1103's in The History of the Advanced
Scientific
Computer (aka, TI ASC), here,
http://www.textfiles.com/bitsavers/pdf/ti/asc/ASC_History_May84.pdf
page 9,
There was strong evidence that semiconductor memory would
replace all other forms of memory then in use. Thus, a project
was set up under George Quimby to investigate memory alternatives
(Appendix G). Two memories were finally developed, high speed
bipolar main memory (first installed in May 1972), and a lower
speed MOS attached memory (first installed in mid 1972).
We were one of the earliest users of the 1K Intel 1103 device.
We had a contract with a firm in Canada who had government
money to get into the semiconductor business and had an agreement
with Intel to produce the 1103. I remember this firm never made
it and folded in the mid 70's.
That company would have been Microsystems International Ltd.
(I have a small bag of those 1103s (NOS, "MIL MF1103", plastic package
with gold pins)).
Having
worked with 1103's I would argue that by modern standards
Even the "cream of the crop" were little above floor sweepings.
Was it that a lot of new 1103s were DOA, oe what there a problem with
them fialing in use, or what?
The reason I ask is that I have several old HP calculators full of
1103s,
and AFAIK all are original (and gettign on for 40 years old). So far,
otuch wood, I've not had any problems with the RAM in these machines.
4947
days inactive
4948
days old
4 comments
5 participants
participants (5)
-
ard＠p850ug1.demon.co.uk -
chrise＠pobox.com -
dkelvey＠hotmail.com -
hilpert＠cs.ubc.ca -
tshoppa＠wmata.com