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Computer Systems
eXercise #2
Representation
- Regarding the Standard Character set, there are a number of patterns
implicit within it
- How many ASCII numbers are between the LOWER case letter
and the UPPER case, and is this constant?
- In BINARY, how would the character sequence 'GIDDAY' appear
(assuming the MSB is set to a zero)
- Regarding the representation of INTEGERS,
- Why is SIGN MAGNITUDE a slightly 'unnatural' way of representing
numbers?
- How would the SIGNED INTEGER '-6536' appear in binary using
SIGN MAGNITUDE?
- Using ONE'S COMPLIMENT, represent the SIGNED INTEGER
-4242, then add it to the SIGNED INTEGER 4242 and comment on the
result?
- Verify that, under TWO's COMPLIMENT, the addition of
-86 to +86 does infact add to ZERO
- In BCD
- How would the number 42 be stored
- Describe the ADVANTAGES of using BCD to represent numbers
- What is the main DISADVANTAGE of using BCD to represent numbers
- Real Numbers are often described 'approximations' when referring
to their storage on computers. Explain why this is so, using a representation
technique as the basis of your explanation.
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