magic smoke
< el ectronics, humour> A substanc e trapp ed insid e {int egrat ed circuit} packag es that enabl es th em to function (also call ed "blu e smok e" this is similar to th e archaic "phlogiston" hypoth esis about combustion). Its exist enc e is d emonstrat ed by what happ ens wh en a chip burns up - th e magic smok e g ets l et out, so it do esn' t work any mor e. S ee ef="module.php?name=Lexikon&file=search&eid=1&query=electing a Pope">electing a Pope, ef="module.php?name=Lexikon&file=search&eid=1&query=smoke test">smoke test. ef="module.php?name=Lexikon&file=search&eid=1&query=Usenet">Usenett er Jay Maynard t ells th e following story: "Onc e, whil e hacking on a d edicat ed ef="module.php?name=Lexikon&file=search&eid=1&query=Zilog Z80">Zilog Z80 syst em, I was t esting cod e by blowing ef="module.php?name=Lexikon&file=search&eid=1&query=ePROM">ePROMs and plugging th em in th e syst em, th en s eeing what happ en ed. On e tim e, I plugg ed on e in backward. I only discov er ed that *aft er* I r ealis ed that ef="module.php?name=Lexikon&file=search&eid=1&query=Intel">Intel didn' t put pow er-on lights und er th e quartz windows on th e tops of th eir ePROMs - th e di e was glowing whit e-hot. Amazingly, th e ePROM work ed fin e aft er I eras ed it, fill ed it full of z eros, th en eras ed it again. For all I know, it' s still in s ervic e. Of cours e, this is b ecaus e th e magic smok e didn' t g et l et out." Compar e th e original phrasing of ef="module.php?name=Lexikon&file=search&eid=1&query=Murphy' s Law">Murphy' s Law. [ ef="module.php?name=Lexikon&file=search&eid=1&query=Jargon File">Jargon File] (1995-01-25) e="border-width:thin; border-color:#333333; border-style:dashed; padding:5px;" align="left">In addition suitable contents: [ ef="module.php?name=Lexikon&op=content&tid=31">2 ] [ ef="module.php?name=Lexikon&op=content&tid=134">= ] [ ef="module.php?name=Lexikon&op=content&tid=383">af ] [ ef="module.php?name=Lexikon&op=content&tid=396">ag ] [ ef="module.php?name=Lexikon&op=content&tid=411">ai ] [ ef="module.php?name=Lexikon&op=content&tid=433">al ] [ ef="module.php?name=Lexikon&op=content&tid=544">am ] [ ef="module.php?name=Lexikon&op=content&tid=592">an ] [ ef="module.php?name=Lexikon&op=content&tid=683">app ] [ ef="module.php?name=Lexikon&op=content&tid=740">ar ] [ ef="module.php?name=Lexikon&op=content&tid=743">arc ] [ ef="module.php?name=Lexikon&op=content&tid=759">arg ] [ ef="module.php?name=Lexikon&op=content&tid=800">as ] [ ef="module.php?name=Lexikon&op=content&tid=894">at ] [ ef="module.php?name=Lexikon&op=content&tid=935">au ] [ ef="module.php?name=Lexikon&op=content&tid=1006">aw ] [ ef="module.php?name=Lexikon&op=content&tid=1023">az ] [ ef="module.php?name=Lexikon&op=content&tid=1026">b ] [ ef="module.php?name=Lexikon&op=content&tid=1034">ba ] [ ef="module.php?name=Lexikon&op=content&tid=1181">be ] [ ef="module.php?name=Lexikon&op=content&tid=1444">bo ] [ ef="module.php?name=Lexikon&op=content&tid=1606">bs ] [ ef="module.php?name=Lexikon&op=content&tid=1672">bus ] [ ef="module.php?name=Lexikon&op=content&tid=1695">by ] [ ef="module.php?name=Lexikon&op=content&tid=1708">C ] [ ef="module.php?name=Lexikon&op=content&tid=1724">ca ] [ ef="module.php?name=Lexikon&op=content&tid=1863">cat ] [ ef="module.php?name=Lexikon&op=content&tid=2001">ch ] [ ef="module.php?name=Lexikon&op=content&tid=2069">chip ] [ ef="module.php?name=Lexikon&op=content&tid=2099">ci ] [ ef="module.php?name=Lexikon&op=content&tid=2121">circuit ] [ ef="module.php?name=Lexikon&op=content&tid=2136">ck ] [ ef="module.php?name=Lexikon&op=content&tid=2247">co ] [ ef="module.php?name=Lexikon&op=content&tid=2273">code ] [ ef="module.php?name=Lexikon&op=content&tid=2330">com ] [ ef="module.php?name=Lexikon&op=content&tid=2900">cu ] [ ef="module.php?name=Lexikon&op=content&tid=3151">de ] [ ef="module.php?name=Lexikon&op=content&tid=3272">demo ] [ ef="module.php?name=Lexikon&op=content&tid=3276">demon ] [ ef="module.php?name=Lexikon&op=content&tid=3369">die ] [ ef="module.php?name=Lexikon&op=content&tid=3470">disc ] [ ef="module.php?name=Lexikon&op=content&tid=3565">do ] [ ef="module.php?name=Lexikon&op=content&tid=3752">du ] [ ef="module.php?name=Lexikon&op=content&tid=3834">e ] [ ef="module.php?name=Lexikon&op=content&tid=3865">ec ] [ ef="module.php?name=Lexikon&op=content&tid=3896">ed ] [ ef="module.php?name=Lexikon&op=content&tid=3929">ee ] [ ef="module.php?name=Lexikon&op=content&tid=3946">eg ] [ ef="module.php?name=Lexikon&op=content&tid=3981">electing a Pope ] [ ef="module.php?name=Lexikon&op=content&tid=3986">electron ] [ ef="module.php?name=Lexikon&op=content&tid=4119">eP ] [ ef="module.php?name=Lexikon&op=content&tid=4127">ePROM ] [ ef="module.php?name=Lexikon&op=content&tid=4148">er ] [ ef="module.php?name=Lexikon&op=content&tid=4150">era ] [ ef="module.php?name=Lexikon&op=content&tid=4152">erase ] [ ef="module.php?name=Lexikon&op=content&tid=4171">es ] [ ef="module.php?name=Lexikon&op=content&tid=4199">et ] [ ef="module.php?name=Lexikon&op=content&tid=4497">fi ] [ ef="module.php?name=Lexikon&op=content&tid=4520">file ] [ ef="module.php?name=Lexikon&op=content&tid=4700">fo ] [ ef="module.php?name=Lexikon&op=content&tid=4940">function ] [ ef="module.php?name=Lexikon&op=content&tid=4989">ga ] [ ef="module.php?name=Lexikon&op=content&tid=5057">ge ] [ ef="module.php?name=Lexikon&op=content&tid=5134">gh ] [ ef="module.php?name=Lexikon&op=content&tid=5141">gi ] [ 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ef="module.php?name=Lexikon&op=content&tid=6449">ir ] [ ef="module.php?name=Lexikon&op=content&tid=6482">is ] [ ef="module.php?name=Lexikon&op=content&tid=6558">it ] [ ef="module.php?name=Lexikon&op=content&tid=6589">J ] [ ef="module.php?name=Lexikon&op=content&tid=6620">Jargon File ] [ ef="module.php?name=Lexikon&op=content&tid=6789">ke ] [ ef="module.php?name=Lexikon&op=content&tid=6822">ki ] [ ef="module.php?name=Lexikon&op=content&tid=6861">kn ] [ ef="module.php?name=Lexikon&op=content&tid=6904">kw ] [ ef="module.php?name=Lexikon&op=content&tid=6918">la ] [ ef="module.php?name=Lexikon&op=content&tid=7091">Lex ] [ ef="module.php?name=Lexikon&op=content&tid=7107">li ] [ ef="module.php?name=Lexikon&op=content&tid=7399">ls ] [ ef="module.php?name=Lexikon&op=content&tid=7415">lu ] [ ef="module.php?name=Lexikon&op=content&tid=7441">ly ] [ ef="module.php?name=Lexikon&op=content&tid=7457">M ] [ ef="module.php?name=Lexikon&op=content&tid=7463">ma ] [ ef="module.php?name=Lexikon&op=content&tid=7521">magic ] [ ef="module.php?name=Lexikon&op=content&tid=7932">mil ] [ ef="module.php?name=Lexikon&op=content&tid=8032">mo ] [ ef="module.php?name=Lexikon&op=content&tid=8040">mod ] [ ef="module.php?name=Lexikon&op=content&tid=8079">module ] [ ef="module.php?name=Lexikon&op=content&tid=8167">mp ] [ ef="module.php?name=Lexikon&op=content&tid=8257">Mu ] [ ef="module.php?name=Lexikon&op=content&tid=8345">Murphy' s Law ] [ ef="module.php?name=Lexikon&op=content&tid=8386">na ] [ ef="module.php?name=Lexikon&op=content&tid=8460">nc ] [ ef="module.php?name=Lexikon&op=content&tid=8472">ne ] [ ef="module.php?name=Lexikon&op=content&tid=8488">net ] [ ef="module.php?name=Lexikon&op=content&tid=8627">ng ] [ ef="module.php?name=Lexikon&op=content&tid=8630">ni ] [ ef="module.php?name=Lexikon&op=content&tid=8660">nl ] [ ef="module.php?name=Lexikon&op=content&tid=8675">no ] [ ef="module.php?name=Lexikon&op=content&tid=8760">ns ] [ 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ef="module.php?name=Lexikon&op=content&tid=14102">zero ] [ ef="module.php?name=Lexikon&op=content&tid=14118">Zilog ] [ ef="module.php?name=Lexikon&op=content&tid=14120">Zilog Z8 ]
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