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https://wiki.lestanville.eu/index.php?title=Architecture&diff=29&oldid=prev Guillaume : Page créée avec « == L'unité centrale == Schéma de principe d'une unité centrale Dans le schéma de principe y sont indiqués les principaux com… » 2022-09-02T09:51:12Z <p>Page créée avec « == L&#039;unité centrale == <a href="/index.php?title=Fichier:Unit%C3%A9_centrale.png" title="Fichier:Unité centrale.png">vignette|Schéma de principe d&#039;une unité centrale</a> Dans le schéma de principe y sont indiqués les principaux com… »</p> <p><b>Nouvelle page</b></p><div>== L&#039;unité centrale ==<br /> [[Fichier:Unité centrale.png|vignette|Schéma de principe d&#039;une unité centrale]]<br /> <br /> Dans le schéma de principe y sont indiqués les principaux composants d&#039;un ordinateur.<br /> <br /> La partie la plus importante est l&#039;ULA pour Unité Logique et Arithmétique. C&#039;est cette partie qui exécute les différentes instructions lues en mémoire.<br /> <br /> Sa mémoire interne est essentiellement composée des [[Processeur|registres]]. <br /> <br /> Pour éviter que tout s&#039;emballe, une horloge permet de cadencer le tout. Certaines instructions ne prennent qu&#039;un tic à s&#039;exécuter alors que d&#039;autres peuvent en prendre plus.<br /> <br /> Les ports d&#039;entrée/sortie permettent à l&#039;unité centrale d&#039;échanger avec le monde extérieur et notamment avec les périphériques.<br /> <br /> J&#039;y ai cité les principaux comme le clavier, la carte graphique pour l&#039;affichage et une unité de stockage comme un disque dur.<br /> <br /> Mais on peut y ajouter d&#039;autres périphériques comme la souris, un lecteur de carte, etc.<br /> <br /> Je ne l&#039;ai pas indiqué, mais aujourd&#039;hui la plupart des périphériques communiquent par l&#039;intermédiaire d&#039;un bus.</div> Guillaume