1
GATE ECE 2004
MCQ (Single Correct Answer)
+2
-0.6
Consider the sequence of 8085 instructions given below.
LXI H, 9258
MOV A, M
CMA
MOV M, A
Which one of the following is performed by this sequence?
A
contents of location 9258 are moved to the accumulator.
B
contents of location 9258 are compared with the contents of the accumulator.
C
contents of location 9258 are complemented and stored in location 9258.
D
contents of location 5892 are complemented and stored in location 5892.
2
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
In an 8085 microprocessor, the instruction CMP B has been executed while the content of the accumulator is less than that of register B. As a result
A
Carry flag will be set but Zero flag will be reset
B
Carry flag will be reset but Zero flag will be set
C
Both Carry flag and Zero flag will be reset
D
Both Carry flag and Zero flag will be set
3
GATE ECE 2002
MCQ (Single Correct Answer)
+2
-0.6
The contents of Register (B) and Accumulator (A) of 8085 microprocessor are 49H and 3AH respectively. The contents of A and the status of carry flag (CY) and sign flag (S) after executing SUB B instructions are
A
A = F1, CY = 1, S =1
B
A = 0F, CY = 1, S =1
C
A = F0, CY = 0, S =0
D
A = 1F, CY = 1, S =1
4
GATE ECE 2002
MCQ (Single Correct Answer)
+2
-0.6
Consider the following assembly language program. GATE ECE 2002 Microprocessors - Instruction Set and Programming with 8085 Question 18 English The execution of the above program in an 8085 microprocessor will result in
A
an output of 87H at port 1
B
an output of 87H at port 2
C
infinite looping of the program execution with accumulator data remaining at 00H.
D
infinite looping of the program execution with accumulator data alternating between 00H and 87H
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