Match List I with List II in 8086 Micro processor Choose the correct answer from the options given below:LIST I LIST II A. Direct memory addressing data memory I. MOV [SI], 2500 H B. Immediate Addressing II. PUSHF C. Flag Manipulation III. RET D. Control transfer IV. MOV BX, [2000 H]
A-IV, B-I, C-II, D-III
To solve this problem, we need to match each type of instruction from List I with the correct operation from List II based on the 8086 Microprocessor instruction set.
- Direct Memory Addressing Data Memory:
- This addressing mode specifies the memory location where data is stored or has to be stored directly in the instruction.
- The instruction
MOV BX, [2000 H]fits this mode as it directly accesses data from memory location 2000H and moves it into the BX register.
- Immediate Addressing:
- This addressing mode involves using constants or immediate data directly in the instructions.
- The instruction
MOV [SI], 2500 Hmeans the immediate data 2500H is moved to the memory location addressed by the SI register.
- Flag Manipulation:
- Operations dealing with processor flags (zero, carry, sign, etc.) fall in this category.
- The instruction
PUSHFsaves the current state of all the flags onto the stack, implying it manipulates flags.
- Control Transfer:
- These instructions are used to alter the flow of control, i.e., jump or return operations.
- The instruction
RETis a return instruction, which pops the top of the stack and transfers control to that address, hence it's a control transfer operation.
Based on this matching:
- A-IV: Direct memory addressing →
MOV BX, [2000 H] - B-I: Immediate Addressing →
MOV [SI], 2500 H - C-II: Flag Manipulation →
PUSHF - D-III: Control transfer →
RET
Therefore, the correct answer is A-IV, B-I, C-II, D-III.
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DAA
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D. Timer 0 Vector location is 000B H
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A. Serial Interrupt
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Choose the correct answer from the options given below :
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R
Assertion A : Some instruction read the contents of an internal port latch instead of reading the status of an external pin.
Reason R : We must not make a distinction between reading the status of the input pin and internal latch of the output port.
In the light of the above statements, choose the most appropriate answer from the options given below :
The ALE line of an 8085 microprocessor is used to
Important Questions from Microprocessors
An 8086 address bus is a/an _____ -bit bus
Program counter for any counter:
In the pin out configuration of the 8085 microprocessor, the sequential input data is represented by
Which of the following functions is not performed by a microprocessor?
Match the columns.
Pin
Description
a. D 0-D 7
1. Reset Input
b. RESET
2. Data Lines
c. A 0,A 1
3. Internal Address
