March 30, 2011 by Chris on Family, Games

Jake won the STEM Challenge!

Congratulations Jake, pretty awesome that you won this

January 21, 2011 by Chris on Family

Old Family Photos

My uncle Dave Hampton was kind enough to provide a number of old family photos he had taken over the years. Enjoy:

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September 19, 2010 by Chris on Technology

The Visual 6502. The first chip I ever programmed now running as a transistor level simulation in your browser.

6502

So cool it inspired some changes around here. via bunnie.

June 10, 2010 by Chris on General

a.k.a. my endless nightmare
… →

May 17, 2010 by Chris on General

Gorgeous timelapse photography. Don’t miss the HD version fullscreen, it is simply stunning

These are my links for July 20th through July 24th:

Ask HN: Best-architected open-source business applications worth studying? | Hacker News -
Monospaced Programming Fonts with Ligatures | Hacker News -
The language of choice - Propositional logic was discovered by Stoics around 300 B.C., only to be abandoned in later antiquity and rebuilt in the 19th century by George Boole’s successors. One of them, Charles Peirce, saw its significance for what we now call logic circuits, yet that discovery too was forgotten until the 1930s. In the ’50s John McCarthy invented conditional expressions, casting the logic into the form we’ll study here; then in 1986 Randal Bryant repeated one of McCarthy’s constructions with a crucial tweak that made his report “for many years the most cited paper in all of computer science, because it revolutionized the data structures used to represent Boolean functions” (Knuth).1 Let’s explore and code up some of this heritage of millennia, and bring it to bear on a suitable challenge: playing tic-tac-toe.
Then we’ll tackle a task that’s a little more practical: verifying a carry-lookahead adder circuit. Supposedly logic gets used all the time for all kinds of serious work, but for such you’ll have to consult the serious authors; what I can say myself, from working out the code to follow, is that the subject offers a fun playground plus the most primitive form of the pun between meaning and mechanism.

You’re encouraged to read with this article’s code cloned and ready