Subtracting binary numbers

  • Thread starter btbam91
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  • #1
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I am asked to come up with two 4-bit binary numbers, that when subtracted, provide the wrong result for both the unsigned and signed cases, inspecting only the first 4 bits of the output.

I have come up with numerous combination where the unsigned is correct, the signed is wrong, and vice versa. But I can't get both of them to be wrong!

Thank you for the help!
 

Answers and Replies

  • #2
Simon Bridge
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Can you express the conditions that the operation gets the wrong result, in general terms, for each case?
 

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