Hacker Dictionary
 
Browse the Dictionary...
All A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Navigation Random Term
  • segfault
    n.,vi. Syn. {segment}, {seggie}.


  •  View Definition: magic smoke 

    magic smoke


    n. A substance trapped inside IC packages that enables them to function (also called `blue smoke'; this is similar to the archaic `phlogiston' hypothesis about combustion). Its existence is demonstrated by what happens when a chip burns up --- the magic smoke gets let out, so it doesn't work any more. See smoke test, let the smoke out.

    USENETter Jay Maynard tells the following story "Once, while hacking on a dedicated Z80 system, I was testing code by blowing EPROMs and plugging them in the system, then seeing what happened. One time, I plugged one in backwards. I only discovered that *after* I realized that Intel didn't put power-on lights under the quartz windows on the tops of their EPROMs --- the die was glowing white-hot. Amazingly, the EPROM worked fine after I erased it, filled it full of zeros, then erased it again. For all I know, it's still in service. Of course, this is because the magic smoke didn't get let out." Compare the original phrasing of {Murphy's Law}.