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Q#1
Microprocessor
GATE EE 2009
MCQ
+2 marks
-0.66 marks
In an 8085 microprocessor, the contents of the Accumulator, after the following instructions are executed will become
XRA A
MVI B F0H
SUB B
01 H
0F H
F0 H
10 H
Explanation:
XRA A: clear the contents of Accumulator. A = 00H
MVI B F0H; B = F0H
SUB B; A =A – B
A = 0000 0000
B = 1111 0000
A –B = 0001 0000 = (10)H and CY will be 1 as carry acts as borrow in case of subtraction.
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