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2 cards from this section. Quick, good the night before a test.
What flag indicates that the result of an operation is zero?
Think about when you add numbers that balance out.
If 5 + 4 equals 9, is there an overflow in unsigned arithmetic?
Consider the maximum you can represent in your bits.
What indicates an overflow in signed arithmetic?
Think about which flags relate to signed numbers.
True or False: An overflow occurs when two large numbers are added together and exceed the maximum representable value.
Consider what it means to go beyond the limits of your representation.
Calculate the result of -2 + 5 and determine if there’s an overflow. If the result is represented in 4-bits, what does it yield?
Convert to binary and examine the range.
If two large negative numbers are added and produce a positive result in a signed integer operation, what has happened? Analyze the results within a 4-bit system.
Employ binary addition to illustrate.
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