Breaking News
Comments
Newest First | Oldest First | Threaded View
old account Frank Eory
User Rank
Rookie
re: Y4G came before Y2K
old account Frank Eory   7/26/2010 11:19:57 PM
NO RATINGS
"640K ought to be enough for anybody."

webmasterpdx
User Rank
Rookie
re: Y4G came before Y2K
webmasterpdx   7/26/2010 11:10:03 PM
NO RATINGS
This was a problem back when nobody thought you'd ever need more than 2G of RAM. Many OS's, including Solaris and Windows were not tested with addresses greater than 2G. The problem was the address became negative, so when adding pointers, things got a bit whacky. All these OS's are fixed today I'm sure as 4G isn't that unreal any more. More than 4G is handled through virtual memory of course (you actually don't need a 64-bit CPU).

blevite
User Rank
Rookie
re: Y4G came before Y2K
blevite   7/26/2010 5:50:22 PM
NO RATINGS
I'm reminded of the Therac-25 (?) back in the 80s. One of the flaws mentioned was an overflow in an 8 bit cycle counter for tuning the radiation beam. When the counter rolled-over, it just continued to focus finer and finer. Caused several fatal burns before the machine was pulled and the manufacturer ended up in court.

thebatosai
User Rank
Rookie
re: Y4G came before Y2K
thebatosai   7/25/2010 10:07:43 PM
NO RATINGS
Very interesting read. Glad to learn so much from it. Thanks.

dhanhurley
User Rank
Rookie
re: Y4G came before Y2K
dhanhurley   7/25/2010 11:36:32 AM
NO RATINGS
Hi from ZÜRICH,SWITZERLAND. "WHAT CAN GO WRONG WILL".IF IT WORKS DO NOT FIX IT. LET US KNEEL ON THE EARTH THIS SUNDAY AND:- HUMBLE OURSELVES, LIFT UP YOUR EYES & HEART, CROSS YOUR FINGERS, AND PRAY, TO SAINT MURPHY. AND WHEN ALL FAILS USE AN "IRISH-SCREWDRIVER". NAMELY A 1 KILO HAMMER Yours "without wax" Dhan Hurley

chazind
User Rank
Rookie
re: Y4G came before Y2K
chazind   7/25/2010 12:57:54 AM
NO RATINGS
This article brought back lots of old memories, having worked on a system where we had counter that the documentation said was 64 bits but turned out to be 32 bits which caused our systems to reboot every 540 days. Needless to say tracking that one down was a joy.

rcutshaw725
User Rank
Rookie
re: Y4G came before Y2K
rcutshaw725   7/24/2010 3:53:48 PM
NO RATINGS
You have to remember also that the Y2K problem actually started in 1970. That was the year that software used to calculate mortgages started failing.

LJL1
User Rank
Rookie
re: Y4G came before Y2K
LJL1   7/24/2010 7:25:19 AM
NO RATINGS
Just because it is "rare" or "unlikely" does not mean it won't happen. I try never to forget that when designing HW or SW.

Duane Benson
User Rank
Blogger
re: Y4G came before Y2K
Duane Benson   7/21/2010 4:27:48 PM
NO RATINGS
This reminds me of an article I read a few years ago about a flight of 12 F-22 fighters losing their brains when crossing the International dateline on a flight between Hawaii and Okinawa. And, back in the early days of the PC era, most PCs shipped with 64K or 128K of RAM. (Yes, that's "K") The box was capable of holding up to 640K of RAM total but quite a few software applications crashed if the computer had more the 512K installed due to a roll-over error. Never take anything for granted when dealing with mins and maxs.



EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Glen Chenier

Engineers Solve Analog/Digital Problem, Invent Creative Expletives
Glen Chenier
2 comments
An analog engineer and a digital engineer join forces, use their respective skills, and pull a few bunnies out of a hat to troubleshoot a system with which they are completely unfamiliar. ...

Max Maxfield

What's the Best Traveling Toolkit?
Max Maxfield
22 comments
A few years ago at a family Christmas party, I won a pocket knife as part of a "Dirty Santa" game. This little scamp was a Buck 730 X-Tract. In addition to an incredibly strong and sharp ...

Rishabh N. Mahajani, High School Senior and Future Engineer

Future Engineers: Don’t 'Trip Up' on Your College Road Trip
Rishabh N. Mahajani, High School Senior and Future Engineer
10 comments
A future engineer shares his impressions of a recent tour of top schools and offers advice on making the most of the time-honored tradition of the college road trip.

Larry Desjardin

Engineers Should Study Finance: 5 Reasons Why
Larry Desjardin
42 comments
I'm a big proponent of engineers learning financial basics. Why? Because engineers are making decisions all the time, in multiple ways. Having a good financial understanding guides these ...

Top Comments of the Week
Flash Poll
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)