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Magistrale

MagistraleO magistrala reprezinta un set de instructiuni dupa care informatiile se ghideaza în interiorul unui sistem de calcul sau intre sisteme de calcul.

Functionarea:
Magistralele sunt formate din mai multe subsisteme. La un anumit moment, unul dintre subsisteme va deveni "master" iar celelalte "slave". Subsistemul master are rolul de a stabili cu ce sistem slave va face transferul de date si in acelasi timp va stabili si sensul acestuia.
Capacitatea se determina prin formula "2n", unde n reprezinta numarul liniilor de adresa.

Magistralele sunt de mai multe tipuri:

  • Magistrala procesorului
    Este calea de comunicare a datelor intre CPU si celelalte cipuri cu care lucreaza.

  • Magistrala memoriei
    Este calea de comunicare a datelor intre CPU si memoria principala (RAM).

  • Magistrala de adrese
    Aceasta se foloseste in operatiile cu memoria alegand adresa de memoria pentru operatia urmatoare.

  • Magistrala I/O
    Este magistrala principala a sistemului, pe aceasta cale circuland cele mai multe date de intrare sau de iesire de toate dispozitivele.

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