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Q#1
Microprocessor
GATE EE 2010
MCQ
+2 marks
-0.66 marks
When a “CALL” Addr” instruction is executed. The CPU carries out the following sequential operations internally:
Note:
(R) means content of register R
((R)) means content of memory location pointed to by R
PC means program counter
SP means stack pointer
Explanation:
Whenever a CALL instruction is executed then the address of next instruction i.e. the contents of Program Counter are pushed to the Stack.
Then the Stack Pointer is incremented to point to the next memory location but in actual Stack Pointer is decremented.
Then the new address is stored in Program Counter to shift the program execution to anew location.
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