Magic Smoke: N. A Substance Trapped Inside IC Packages That Enables Them To Function (also Called `blue Smoke'

HomeFortune CookiesMiscellaneous Collections

: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}.
-- The AI Hackers Dictionary

Related: