3 Kasım 2010 Çarşamba

Binary sayi sistemi

DESIMAL SAYI SISTEMI 
        0,1,2,3,4,5,6,7,8,9 rakamlarindan olusan, günlük hayatta kullanilan 10 tabanli sayi sistemine desimal sayi sistemi denir.
Bir desimal sayi su denklemle ifade edilebilir;
 
                                               D = dn.10n + ..........+ d. 10 3 + d. 10 2 + d. 10 1 + d. 10 0
 
                                                           10= 1                         10= 1000
                                                           10= 10                       10= 10000
                                                           10= 100                     10= 100000                                       

    Örnek :  410 sayisinin  desimal olarak ifade edilmesi.

              0    Birler  Basamagi       = 0 . 10                                    410 = 4.10+ 1.101 + 0.100
                  1   Onlar   Basamagi       = 1 . 10                                           = 4.100 + 1.10 + 0.1
                  4   Yüzler Basamagi        = 4 . 102                                            = 400 + 10
                                                                                                                      = 410
 
        BINARY SAYI SISTEMI    
              
       Tam ve ondalikli sayilarin binary sayilarin desimale çevrilmesi : 0 ve 1 rakamlarindan olusan, dijital ve bilgisayar sistemlerinde kullanilan 2 tabanli sayi sistemine binary sayi sistemi denir.
         Binary sayinin tam ve kesirli bitleri üslü ifadesi olusturulmus taban sayisi ile çarpilarak toplanir.
 
 B = b. 2 n  + ...... + b1.21 + b0.20 + b1.2-1 + b.2 -2 + ....... + b. 2 –n

     Örnek : (10,011) 2 = (?) 10

                                                      (  1  0 , 0  1  1  )    = 1. 2+ 0.2+ 0 . 2-1 + 1 . 2-2 + 1 . 2-3
 
                                                        220 2-12-22-3     = 1 . 2 + 0 . 1 + 0 . 0,5 + 1 . 0,25 + 1 . 0,125
 
                                                                                    = 2 + 0 + 0 + 0,25 + 0,125
 
                                                                                    = (2,375)10
 
 
        Tam ve ondalikli desimal sayilarin binary e çevrilmesi : Tam ve ondalikli desimal sayilari binary sayi sistemine çevirmek için tam sayi kisminin 2 ’ye bölünmesi, ondalikli kisminin da 2 ile çarpilmasi gerekir.
         Örnek :  (42,65625)10 = (?)
       
 
 
        Desimal sayilarin binary karsiliklari tablosu :
 
 
 

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