Breaking News
Comments
Newest First | Oldest First | Threaded View
jrogers_ppl
User Rank
Author
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
Author
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
Author
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
Author
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
Author
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
Author
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
Author
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
Author
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



Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Like Us on Facebook
Special Video Section
5G LTE is on the way. These systems will require more ...
Protecting sensitive electronic circuitry from voltage ...
09:45
Watch as a web server authenticates or rejects a water ...
Protecting sensitive electronic circuitry from voltage ...
Watch as a web server authenticates or rejects a water ...
Protecting sensitive electronic circuitry from voltage ...
Power can be a gating factor in success or failure of ...
Get to market faster and connect your next product to the ...
00:44
See how microQSFP is setting a new standard for tomorrow’s ...
The LTC3649 step-down regulator combines key features of a ...
Once the base layer of a design has been taped out, making ...
In this short video we show an LED light demo to ...
The LTC2380-24 is a versatile 24-bit SAR ADC that combines ...
In this short video we show an LED light demo to ...
02:46
Wireless Power enables applications where it is difficult ...
07:41
LEDs are being used in current luxury model automotive ...
With design sizes expected to increase by 5X through 2020, ...
01:48
Linear Technology’s LT8330 and LT8331, two Low Quiescent ...
The quality and reliability of Mill-Max's two-piece ...