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Negative Number Representations (graded)
HCS12 uses 2’s complement representation for negative numbers. Discuss other techniques used for representing negative numbers inside CPUs. Talk about the advantage of 2’s complement over the other representations. Show some examples of how numbers are represented using each technique.
Instructions Used for Signed and Unsigned Numbers (graded)
This week, we are talking about different instructions for signed and unsigned numbers. Discuss the carry, overflow, and N flag. How does CPU know if you are using a number as a signed number or as an unsigned number?