Design Con 2015
Breaking News
Comments
Newest First | Oldest First | Threaded View
jrogers_ppl
User Rank
Rookie
Re: 74x ? We do....
jrogers_ppl   4/13/2014 7:48:04 PM
NO RATINGS
@tom-ii :

 

Sorry your schematic is lost. Thank you for looking, nonetheless :)

jdr

tom-ii
User Rank
Blogger
Re: 74x ? We do....
tom-ii   4/13/2014 7:04:57 PM
NO RATINGS
Update:

 

Took a look in the only places it might be..  It appears to be lost to the annals of time.  Interesting thought, though,, maybe someday I'll rebuild it on an FPGA...

tom-ii
User Rank
Blogger
Re: 74x ? We do....
tom-ii   4/13/2014 6:53:45 PM
NO RATINGS
Oh, holy cow.  That was a long time ago.  I'll take a look, but I won't hold much of a whisper of hope...

jrogers_ppl
User Rank
Rookie
Re: 74x ? We do....
jrogers_ppl   4/13/2014 4:57:47 PM
NO RATINGS
@tom-ii :

>
I once built a 4-bit CPU from 7400 logic on a few breadboards - it had a whopping 256B of RAM!

<

 

Could you post schematics somewhere?  I can't be the only one that would be intrigued by something like this.

 

tom-ii
User Rank
Blogger
Re: 74x ? We do....
tom-ii   3/17/2014 3:19:38 PM
NO RATINGS
@Alvie:

Neato!


I once built a 4-bit CPU from 7400 logic on a few breadboards - it had a whopping 256B of RAM!

Alvie
User Rank
Blogger
74x ? We do....
Alvie   3/17/2014 2:59:24 PM
NO RATINGS
build the circuit using 74LS-series logic. (Does anyone still do this?)

I guess sometimes we do it, even if for just plain saudosism :)

Here's something I came up for the 2011 7400 competition :

http://alvie.com/7400contest/

The contest is (was?) organized by Dangerous Prototypes, and many interesting stuff has popped up in 2011 and 2012. There was no contest in 2013 as far as I know, perhaps this year.

It was so fun...

Alvie

tom-ii
User Rank
Blogger
Re: Pointing the finger of blame
tom-ii   3/17/2014 2:18:12 PM
NO RATINGS
...  but of course!

Max The Magnificent
User Rank
Blogger
Pointing the finger of blame
Max The Magnificent   3/17/2014 1:54:14 PM
NO RATINGS
@Tom-ii: ...but the most gloriously Magnificent Max suggested that I write something out and present it to the EE Times universe for your amusement.

Oh, so now it's my fault! LOL



Most Recent Comments
Top Comments of the Week
Flash Poll
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
<b><a href=Betajet">

The Circle – The Future's Imperfect in the Present Tense
Betajet
5 comments
The Circle, a satirical, dystopian novel published in 2013 by San Francisco-based writer Dave Eggers, is about a large, very powerful technology company that combines aspects of Google, ...

Max Maxfield

Recommended Reads From the Engineer's Bookshelf
Max Maxfield
27 comments
I'm not sure if I read more than most folks or not, but I do I know that I spend quite a lot of time reading. I hate to be idle, so I always have a book or two somewhere about my person -- ...

Martin Rowe

Make This Engineering Museum a Reality
Martin Rowe
Post a comment
Vincent Valentine is a man on a mission. He wants to make the first house to ever have a telephone into a telephone museum. Without help, it may not happen.

Rich Quinnell

Making the Grade in Industrial Design
Rich Quinnell
16 comments
As every developer knows, there are the paper specifications for a product design, and then there are the real requirements. The paper specs are dry, bland, and rigidly numeric, making ...

Special Video Section
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.
Recently formed Architects of Modern Power consortium ...
Specially modified Corvette C7 Stingray responds to ex Indy ...
Avago’s ACPL-K30T is the first solid-state driver qualified ...
NXP launches its line of multi-gate, multifunction, ...
Doug Bailey, VP of marketing at Power Integrations, gives a ...
See how to ease software bring-up with DesignWare IP ...
DesignWare IP Prototyping Kits enable fast software ...
This video explores the LT3086, a new member of our LDO+ ...
In today’s modern electronic systems, the need for power ...