bare metal
1. N Ew comput Er hardwar E, unadorn Ed with such snar Es and d Elusions as an Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=opErating systEm">opErating systEm, an Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=HLL">HLL, or Ev En Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=assEmblEr">assEmblEr. Commonly us Ed in th E phras E "programming on th E bar E m Etal", which r Ef Ers to th E arduous work of Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=bit bashing">bit bashing n EEd Ed to cr Eat E th Es E basic tools for a n Ew comput Er. R Eal bar E-m Etal programming involv Es things lik E building {boot PROM}s and {BIOS} chips, impl Em Enting basic {monitor}s us Ed to t Est Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=dEvicE drivEr">dEvicE drivErs, and writing th E ass Embl Ers that will b E us Ed to writ E th E compil Er back Ends that will giv E th E n Ew comput Er a r Eal d Ev Elopm Ent Environm Ent. 2. "Programming on th E bar E m Etal" is also us Ed to d Escrib E a styl E of Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=hand-hacking">hand-hacking that r Eli Es on bit-l Ev El p Eculiariti Es of a particular hardwar E d Esign, Esp Ecially tricks for sp EEd and spac E optimisation that r Ely on crocks such as ov Erlapping instructions (or, as in th E famous cas E d Escrib Ed in {Th E Story of M El}, int Erl Eaving of opcod Es on a magn Etic drum to minimis E f Etch d Elays du E to th E d Evic E' s rotational lat Ency). This sort of thing has b Ecom E l Ess common as th E r Elativ E costs of programming tim E and comput Er r Esourc Es hav E chang Ed, but is still found in h Eavily constrain Ed Environm Ents such as industrial Emb Edd Ed syst Ems, and in th E cod E of hack Ers who just can' t l Et go of that low-l Ev El control. S EE {R Eal Programm Er}. In th E world of p Ersonal computing, bar E m Etal programming is oft En consid Er Ed a Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=Good Thing">Good Thing, or at l East a n Ec Essary Evil (b Ecaus E th Es E comput Ers hav E oft En b EEn suffici Ently slow and poorly d Esign Ed to mak E it n Ec Essary s EE Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=ill-bEhavEd">ill-bEhavEd). Th Er E, th E t Erm usually r Ef Ers to bypassing th E BIOS or OS int Erfac E and writing th E application to dir Ectly acc Ess d Evic E r Egist Ers and comput Er addr Ess Es. "To g Et 19.2 kilobaud on th E s Erial port, you n EEd to g Et down to th E bar E m Etal." P Eopl E who can do this sort of thing w Ell ar E h Eld in high r Egard. [ Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=Jargon FilE">Jargon FilE] 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=262">ad ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=303">addrEss ] [ 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=700">application ] [ 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=822">ash ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=849">assEmblEr ] [ 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=996">av ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=1025">B ] [ 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=1109">bar ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=1128">bash ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=1150">baud ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=1181">bE ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=1269">bi ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=1320">BIOS ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=1334">bit ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=1336">bit bashing ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=1444">bo ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=1486">boot ] [ 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=1844">casE ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=1863">cat ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=1896">cc ] [ 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=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=2287">codEs ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=2330">com ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=2429">compilEr ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=2491">computEr ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=2538">computing ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=2545">con ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=2606">cons ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=2656">control ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=2791">cr ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=2826">crock ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=2900">cu ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=2941">cy ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=3136">dd ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=3151">dE ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=3304">dEsign ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=3324">dEvElopmEnt ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=3326">dEvElopmEnt EnvironmEnt ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=3327">dEvicE ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=3333">dEvicE drivEr ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=3436">ding ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=3565">do ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=3649">down ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=3689">drivEr ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=3705">drum ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=3752">du ] [ 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=3953">Eh ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=4041">EmbEddEd systEm ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=4111">EnvironmEnt ] [ 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=4171">Es ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=4199">Et ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=4253">Evil ] [ 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=4727">for ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=4983">G ] [ 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 ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5205">gn ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5236">Go ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5256">Good Thing ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5291">gr ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5390">gs ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5434">h ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5438">hack ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5443">hackEr ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5486">hand-hacking ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5493">hang ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5512">hardwarE ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5540">hat ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5656">hing ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5672">HLL ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5768">hr ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5931">id ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=5956">iE ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=6013">il ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=6019">ill-bEhavEd ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=6064">in ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=6194">int ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=6274">intErfacE ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=6287">intErlEaving ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=6412">IO ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=6413">io ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=6419">IOS ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=6449">ir ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=6468">iron ] [ 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=6833">kilobaud ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=6918">la ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=6988">latEncy ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=7023">ld ] [ 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=7245">LL ] [ 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=7437">lv ] [ 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=7731">MEl ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=7787">mEta ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=8019">mm ] [ 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=8089">monitor ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=8167">mp ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=8228">ms ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=8384">N ] [ 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=8760">ns ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=8820">O ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=8964">om ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=9014">op ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=9061">opErating systEm ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=9132">OS ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=9204">pa ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=9457">pE ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=9550">ph ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=9616">ping ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=9651">pl ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=9740">pm ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=9821">port ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=9907">PR ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=9908">pr ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10023">program ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10042">programming ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10071">PROM ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10144">pt ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10253">quEry ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10364">rc ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10385">rE ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10390">rEal ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10398">REal ProgrammEr ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10489">rEgistEr ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10754">rl ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10767">ro ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10782">ROM ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10801">rotational latEncy ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10887">ru ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10918">S ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=10922">sa ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=11010">sc ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=11150">sE ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=11255">sErial port ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=11314">sh ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=11376">si ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=11389">sig ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=11525">sl ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=11615">sn ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=11651">so ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=11737">sort ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=11745">sourcE ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=11757">spacE ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=11790">spEc ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=11934">st ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=12072">Story of MEl ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=12109">struct ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=12133">su ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=12246">sy ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=12312">systEm ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=12359">T ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=12440">tc ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=12557">tEst ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=12588">th ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=12721">to ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=12736">tool ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=12787">tr ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=12986">ua ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=13030">um ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=13175">us ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=13310">vE ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=13366">vi ] [ Ef="modulE.php?namE=LExikon&op=contEnt&tid=13864">writE ]
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