Hi, I have been testing some vintage Fairchild 2102 SRAMs and have found that a small percentage of chips that initially fail a pretty comprehensive memory...
28074
B. Degnan
billdeg
Nov 12, 2012 8:34 pm
... a small percentage of chips that initially fail a pretty comprehensive memory test. However after several reruns of the test, sometimes over several...
28075
corey986
Nov 13, 2012 12:01 am
Bill, I'm seeing this also. At first I thought it was heat related but as Mike said it appears not. I know I am testing the chips individually using Mike's...
28076
Mike
mwillega
Nov 13, 2012 1:33 am
Unfortunately I could not identify any issue related to connectivity, despite efforts to do so. A number of the parts that initially failed, never failed...
28077
Mike Loewen
mloewen16823
Nov 13, 2012 4:47 am
I picked up another HP terminal from Epay (sorry, Jack) for my 2109E system: http://sturgeon.css.psu.edu/~mloewen/Oldtech/Terminals/HP2645A.html It has some...
28078
Evan Koblentz
ekoblentz
Nov 13, 2012 5:08 am
Festivus is just one month away. Our party is Dec. 8-9 at the museum, same room as the past couple of years. We'll have a sign up on the front gate for any...
28079
Kyle Owen
kylevowen
Nov 13, 2012 7:18 am
I was given two Intellecs, a 4 MOD 40 and an 8 MOD 80, a little over a week ago. Both are in phenomenal condition. They were bought from surplus in the ...
28080
Brian Schenkenberger,...
VAXman@...
Nov 13, 2012 11:37 am
Hi, Just testing. Evan put my email address, this address, back on the list after Yoohoo claimed I was "bouncing"; emails when, in fact, there was no way for...
28081
Jason Howe
mechanicjay
Nov 13, 2012 11:54 am
Just got my power back yesterday afternoon, that's pretty much a full 14 days without. We lost 2 big trees. One across the driveway, taking out my nice new...
28082
corey986
Nov 13, 2012 1:27 pm
Well at first I was thinking "Attack of the Killer Tomatoes" , but then I realized if I drag along a blu-ray player, this would be a great opportunity to put...
28083
Brian Schenkenberger,...
VAXman@...
Nov 13, 2012 1:52 pm
... "Attack of the Killer Tomatoes!" A classic. Since this is InfoAge and it's in NJ, don't forget a copy of "The Toxic Avenger -- The First Superhero from ...
28084
corey986
Nov 13, 2012 3:09 pm
I have an eprom programmer kit, but it will be a few weeks before I can get all the parts and build it. I want to burn an "Altair" monitor to a 1702A....
28085
Jim Scheef
jscheef
Nov 13, 2012 4:30 pm
Shouldn't the movies have a computer connection? - or at least technology? The movie we watched last year, while more of a date flick, was obscure, ...
28086
Dan Roganti
ragoo_sauce
Nov 13, 2012 5:43 pm
This is a very interesting anomaly. I personally can't recall this happening before as I haven' tried this method. I would throw out the IC in question if it...
28087
Evan Koblentz
ekoblentz
Nov 13, 2012 6:44 pm
... Finally, a valid MARCH science experiment that doesn't involve beer and alien probes....
28088
Mike Loewen
mloewen16823
Nov 13, 2012 6:47 pm
... http://sturgeon.css.psu.edu/~mloewen/Q7/scifi/AlienProbe/ Mike Loewen mloewen@... Old Technology...
28089
s100doctor
Nov 13, 2012 9:05 pm
... Send me the hex listing and a 1702A and return postage by mail. Or send two 1702A's. I can do this, by hand, it's only 256 bytes, with my PRO-LOG portable...
28090
s100doctor
Nov 13, 2012 9:28 pm
... Hard to know the cause, if the effect can't be duplicated. A proper kind of test about "heat" versus "corroded pins" would possibly be something like this:...
28091
s100doctor
Nov 13, 2012 9:57 pm
... This is a fantastic find! I've wanted a MOD 80 for a long time. I have some MOD 40 stuff. When time permits me, I'll chat with you about Intellec stuff....
28092
Mike
mwillega
Nov 14, 2012 12:10 am
HI Dan, I'm suspicious of some sort of physical anomaly, like what you are describing. I would have thought that it would be discovered before, and described...
28093
Mike
mwillega
Nov 14, 2012 12:23 am
Hi Herb, These are individually tested (except for speed) in a purpose built fixture. http://willegal.net/superproto/index.php?title=2102_SRAM_Tester Looking...
28094
Dan Roganti
ragoo_sauce
Nov 14, 2012 12:43 am
... I suggest separating this "Initial Fail" batch into groups, which you can organize a testing profile. I'm not sure how many you have there to use as test...
28095
Richard Cini
racinijr
Nov 14, 2012 2:32 am
All -- I picked-up a dual 8" floppy drive system from Lobo Systems off of eBay. I just received it so I haven't done any testing yet, but I can't seem to find ...
28096
B Degnan
billdeg
Nov 14, 2012 3:19 am
My guess...I believe SA800 clones specific/jumpered to the oem it was sold to clone. Pics? -- Sent from my PDP 8/e....
28097
B Degnan
billdeg
Nov 14, 2012 3:26 am
I agree. Id rather watch a movie with vintage computers that make up the plot/props. -- Sent from my PDP 8/e....
28098
Kyle Owen
kylevowen
Nov 14, 2012 3:38 am
I fully intend to start my own web page soon. I may even try hosting it myself. We'll see how long I can do that before Charter complains. I have so much I can...
28099
hornbetw
Nov 14, 2012 4:34 am
Mike, You may be running into capacitance issues using the plugin breadboard and ribbon cable. The plugin boards have fairly high capacitance between rows of...
28100
corey986
Nov 14, 2012 11:00 am
Tom, I have the same test setup as Mike. I'm not sure it's capacitance causing the "failures";, for all we know it's helping revive the chips ;) I have tested...
28101
Rich Cini
racinijr
Nov 14, 2012 12:19 pm
Thanks Bill. Look at ebay 190743958928. There are quite a few pics there. Rich Cini Sent from my iPhone...
28102
David Gesswein
dgesswein
Nov 14, 2012 12:39 pm
... Those look like the Shugart 800's that I have. Mine have a manufacturer sticker on the bottom near the spindle pulley. Like this. You can just see the...
