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Q#1
Microprocessor
GATE EC 1997
NAT
+2 marks
-0 marks
An uses a 2 MHz crystal. Find the time taken by it to execute the following delay subroutine, inclusive of the call instruction in the calling program.
You are given that a CALL instruction takes 18 cycles of the system clock, PUSH requires 12 cycles and a conditional jump takes 10 cycles if the jump is taken and 7 cycles if it is not. All other instructions used
above take clock cycles, where n is the number of accesses to the memory, inclusive of the op-code fetch.
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