Thanks for the post Chuck, but we need a photo... here's the ALU board - one of several plugged into a backplane:
Cheers
Ed
| AnyCPU http://anycpu.org/forum/ |
|
| NANDputer lives! http://anycpu.org/forum/viewtopic.php?f=15&t=51 |
Page 1 of 1 |
| Author: | Chuckt [ Sun Mar 17, 2013 1:24 pm ] |
| Post subject: | NANDputer lives! |
NANDputer lives! Quote: First on the list is the NANDputer. What is a NANDputer? it’s a computer made out of nothing but NAND gates of course! I dunno why, but I thought it’d be fun to make this. I first had to work out how various parts of a CPU would be made out of NANDs, did a bunch of tests and went to town. The design took about 2 months to come up with and make. At the bottom of the post is a few statistics on gate usage and count of each type (2 input, 3 input, 4 input, etc). As I suspected, the quantity vs. gate input count follows a pretty steep curve, with most gates being 2 inputs, and the fewest being 13 input gates. http://blog.kevtris.org/?p=62 |
|
| Author: | BigEd [ Sun Mar 17, 2013 10:15 pm ] |
| Post subject: | Re: NANDputer lives! |
Thanks for the post Chuck, but we need a photo... here's the ALU board - one of several plugged into a backplane: Cheers Ed |
|
| Author: | Garth [ Mon Mar 18, 2013 3:32 am ] |
| Post subject: | Re: NANDputer lives! |
That's amazing. It's so useless, and yet so useful, useful because of all that is learned in the process of making it. It reminds me of BMOW and of Dieter's processor made of discrete transistors. As he pust it, "This is art." And yes, there's a reason people take the time to paint a picture when it would be so much easier to just photograph the scene. (I tried a little painting in high school, but then got super interested in photography.) |
|
| Author: | Dr Jefyll [ Wed Mar 20, 2013 5:40 pm ] |
| Post subject: | Re: NANDputer lives! |
Thanks for the link, Chuckt. I got a big grin out of this project.  It reminds me of some (half-) joking comments shared years ago with some computer buddies of mine. We were pursuing the same line of though: namely, a computer built with low-integration components. Rather than NAND gates, we proposed to use nothing but Open Collector inverters (such as 7405). In our discussions we laughingly referred to this most basic of elements as the "BUT Gate."We had a lot of fun, and thought our approach (it was just talk) represented a delightfully low level of of integration -- VSSI, you might say, rather than VLSI! But Dieter put us all to shame by using even lower integration... and actually building a working unit!  Jeff http://LaughtonElectroncs.com |
|
| Page 1 of 1 | All times are UTC |
| Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |
|