Microprocessor and Interfacing

The immediate addressing mode can be used for

1. loading internal register with initial values

2. perform arithmetic or logical operation on data contained in instruction .

Which one of the following is true

• Only 1

• Only 2

• Both 1 and 2

• None of the above

What is the role of the Bus Interface Unit (BIU) in the operation of a microprocessor, and how does it differ from the Execution Unit (EU)?

• The BIU fetches instructions from memory, while the EU executes them; they work in parallel to enhance processing speed.

• The BIU executes instructions, while the EU manages data transmission; they work sequentially to ensure accurate processing.

• The BIU manages memory segmentation, while the EU controls input/output operations; they work independently to handle different tasks.

• The BIU interfaces with input/output devices, while the EU processes data; they work interchangeably depending on the workload.

Explain the concept of timing diagram in the context of 8086 assembly language programming and its significance in instruction execution.

• Timing diagram illustrates the sequence of events during instruction execution, including fetch and execution cycles, to ensure proper synchronization and timing.

• Timing diagram depicts memory segmentation and addressing modes, facilitating efficient memory access and data transfer operations.

• Timing diagram outlines the instruction format and addressing modes, enabling programmers to optimize code performance and minimize execution time.

• Timing diagram represents the flow of control within a program, indicating the occurrence of branch instructions and conditional jumps for decision-making.

Which instruction is commonly used for unconditional branching in 8086 assembly language?

• CMP

• JZ

• JMP

• CALL

Zero address instructions are necessarily used in ____________ architecture

• Stack

• CISC

• RISC

• Parallel

What is the purpose of the addressing mode "direct addressing" in assembly language programming?

• To access data stored in memory using a register

• To perform arithmetic operations between memory locations

• To transfer data between registers and memory

• To execute conditional branches based on a comparison

After the execution of CALL instruction

• The contents of stack pointer will be incremented by 1

• The contents of stack pointer will be decremented by 1

• The contents of stack pointer will be incremented by 2

• The contents of stack pointer will be decremented by 2

In microprocessors, the IC (instruction cycle), FC (fetch cycle) and EC (execution cycle) are related as

• IC=FC-EC

• IC=FC+ EC

• IC=FC+ 2EC

• EC=IC+FC

The 8086 XLAT is used to

• Exchange the contents of memory with register

• convert the byte into word

• convert the word into double word

• Convert the ASCII into EBCDIC

What is the difference between CISC and RISC microprocessors?

• CISC has a complex instruction set and RISC has a reduced instruction set

• CISC has a reduced instruction set and RISC has a complex instruction set

• CISC has a higher clock speed and RISC has a lower clock speed

• CISC has a lower clock speed and RISC has a higher clock speed