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Registers:
hold addresses and data
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Fixed
width memory word that hold binary
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values
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Width
= M bits => 2M different binary values
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16
bit register can point to 65536 locations
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32
bit register can point to 4294967296
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64
bit register can point to 1.84467E+19
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locations
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Hexadecimal
notation 0...9, A..F
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16
values, 1 hex digit is 4 binary bits
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0000
=> 0 0100 => 4 1000 => 8 1100 => C
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0001
=> 1 0101 => 5 1001 => 9 1101 => D
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0010
=> 2 0110 => 6 1010 => A 1110 => E
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0011
=> 3 0111 => 7 1011 => B 1111 => F
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