vu cs507 Mid Term Subjective Solved Past Paper No.3
vu cs507 Information Systems Solved Past Papers
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SHR
The SHR inserts a zero from the left and moves every bit one position to the right and copy the rightmost bit in the carry flag.
SAR
The SAR shift every bit one place to the right with a copy of the most significant bit left at the most significant place. The bit dropped from the right is caught in the carry basket. The sign bit is retained in this operation.
Whenever an element is pushed on the stack SP is decremented by two and whenever an element is popped on the stack SP is incremented by two.
A decrementing stack moves from higher addresses to lower addresses as elements are added in it while an incrementing stack moves from lower addresses to higher addresses as elements are added.
As the 8088 stack works on word sized elements. Single bytes cannot be pushed or popped from the stack.
