13. Which registert\'s) can be used with register indirect (MOV OR, A) addressin

Question

13. Which registert's) can be used with register indirect (MOV OR, A) addressing mode? A RO and R1 B R7 only C. RO only D. R6 and R7 14. What is the final result in the accumulator following the execution of the following program segment? MOV A, #39H ANL A, #OFH A. 09H B. OFH C. 39H D. 3FH 15, Relative addressing is limted to a target range of A-128 to+127 B. O to 127 C. O to 255 D.-255 to +255 16. The stack is a section of A RAM B. ROM C. UV-EPROM D. EEPROM 17. What is the condition for which the JZ instruction jumps to the target address? A If the accumulator contents B If the accumulator contents1 C. If the accumulator contents> D" the accumulator contents 0 18. Which of the following best describes a subroutine? A A set of instructions that can be called more than once by the program B. A set of instructions that can only be called once by the program C. A set of instructions that substitute altemate functions D. A set of instructions located at a fixed block of memory 19. What is the final result in the accumulator following the execution of the following program segment? MOVA, #09H ORLA #30H

Explanation / Answer

Solution:

13)

A, Register R0 and R1

Explanation:

Register R0 and R1 are used in Indirect addressing mode.

14)

C, 09H

Explanation:

39H = 0011 1001

OFH = 0000 1111 ANL do bitwise (1,1=1 1,0=0 0,1=1 0,0=0)

0000 1001 =09H

15)

A, The relative range is -128 to 127

16)

C, RAM

17)

A

18)

A

19)

Answer of the instruction is 39H. ORL does bitwise OR(1,0=1 0,1=1 1,1=1 0,0=0)

09H = 0000 1001  
30H = 0011 0000
00111001 =39H

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