The von Neumann Model Chapter 4

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1
Bits, Data types, and Operations Chapter 2
COMP 2610
Dr. James Money COMP 2610
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Hexadecimal Notation

• A 10
• B 11
• C 12
• D 13
• E 14
• F - 15

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Hexadecimal Notation

• How do we convert from decimal -gt hexadecimal?
• We divide by 16 and use the remainer as before in
  the radix method

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Hexadecimal Notation

• Convert the following numbers to hexadecimal
• 128
• 273
• 983

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Hexadecimal Notation

• Converting to decimal from hexadecimal works
  similarly. We have to use the base of 16.
• If M (bkbk-1b2b1b0)16, then
• Mbk x 16k bk-1 x 16k-1 b1161 b0160

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Hexadecimal Notation

• Convert the following hexadecimal numbers to
  unsigned decimal form
• 0x34
• 0x10D
• 0xABC4

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Hexadecimal Notation

• Addition with hexadecimal form follows the same
  as binary using long addition
• However, the carry can be more difficult to
  handle you have to mod by 16 to get the right
  carry value
• You have to remember A10, B11, etc

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Hexadecimal Notation

• Add
• 0x027A 0x123
• 0xA357 0xB35D