Create a table which shows the outputs of the circuit in signed decimal representation when the inputs change from the largest possible number to the smallest number. When the carry is discarded, the result 4-bit long. Which combination of inputs result in an overflow.

Systems Architecture
7th Edition
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Stephen D. Burd
Chapter4: Processor Technology And Architecture
Section: Chapter Questions
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Digital Logic Design
4-bit Binary Adder / Subtractor

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4. Create a table which shows the outputs of the circuit in signed decimal representation when the inputs
change from the largest possible number to the smallest number. When the carry is discarded, the result is
4-bit long. Which combination of inputs result in an overflow.
Inputs
Outputs (According to the Mode)
M1=0, Mo=0
M1=0, Mo=1
M1=1, Mo=0
Overflow
Overflow
В-А
Overflow
A
A+B
А-В
(Y/N)
(Y/N)
(Y/N)
Transcribed Image Text:4. Create a table which shows the outputs of the circuit in signed decimal representation when the inputs change from the largest possible number to the smallest number. When the carry is discarded, the result is 4-bit long. Which combination of inputs result in an overflow. Inputs Outputs (According to the Mode) M1=0, Mo=0 M1=0, Mo=1 M1=1, Mo=0 Overflow Overflow В-А Overflow A A+B А-В (Y/N) (Y/N) (Y/N)
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