VILLAMOR OT2

register specific instructions

The addressing mode, in which the instructions has no source and destination operands is

B. Base Addressing

10. MOV AX, [BX+4] is a sample of which type of addressing?

D. Register Indirect Addressing

11. MOV DL, [SI] is a sample of which type of addressing?

B. Base Addressing

12. Base registers, BX or BP, is used as a pointer to the desired memory location in this type of addressing.

D. PUSHA

13. This instruction pushes all registers to the stack.

D. Copy the source of the string to the destination string

14. MOVS is used to ___________

B. 32-bit general purpose register

15. BSWAP swaps bytes in a ______

A. Assembler

2. An _________ is a special program that will understand the contents of the object file

D. Single-line-assemblers

3. This type of assemblers work with one source line at a time and are restricted in operation.

C. Segments

4. ______ contains many new pseudocodes to help the assembler generate the correct machine code for the object file.

D. Memory to register, register to register, register to memory

5. Data transfer group contains instructions that transfer from ____________.

A. String, 64KB

6. A _____ is a collection of bytes stored sequentially in memory, whose length can be up to _______.

B. AND, OR, XOR, NOT

7. Bit manipulation is used for __________.

A. Effective Address

8. Address is referred to ________ when the processor's address bus is formed by some combination of segment register and an additional numerical offset.

D. Immediate Addressing

9. MOV CX, 7 is a sample of which type of addressing?

internal data RAM and SFRS

A storage of address that can be directly accessed is

destination address of call or jump

A symbol, 'addr 16' represents the 16-bit address which is used by the instructions to specify the

Based addressing mode

A type of addressing mode, the offset address of the operand is given by the sum of contents of the BX/BP registers and 8-bit/16-bit displacement.

The value stored in memory location 45 is retrieved and one more operand is requested

Add #45, when this instruction is executed the following happen/s,

MOV AX, [1592H]

An example of direct addressing mode

MOV AL, FFH

An example of immediate addressing mode

ADD AL, [DI+16]

An example of indexed addressing mode

MOV CX, AX

An example of register addressing mode

MOV DX, [BX+04]

Based addressing mode example

By addition of index register contents to the partial address in instruction

How is the effective address of base-register calculated?

Push down stack

In case of, Zero-address instruction method the operands are stored in _____ .

EA = 5+[R1]

In the following indexed addressing mode instruction, MOV 5(R1),LOC the effective address is ______ .

Indexed addressing mode

In this addressing mode, the operands offset address is found by adding the contents of SI or DI register and 8-bit/16-bit displacements

immediate mode

In which of these addressing modes, a constant is specified in the instruction, after the opcode byte?

Immediate Mode

It is an addressing mode in which the data operand is a part of the instruction itself.

data pointer

The address register for storing the 16-bit addresses can only be

all of the mentioned

The address register for storing the 8-bit addresses can be

Direct Mode

The addressing mode in which the effective address of the memory location is written directly in the instruction

Indirect addressing mode

The addressing mode which makes use of in-direction pointers is ______ .

Immediate

The addressing mode, where you directly specify the operand value is _______

Relative

The addressing mode/s, which uses the PC instead of a general purpose register is ______ .

accumulator with that of program counter or data pointer

The data address of look-up table is found by adding the contents of

5+[R1]+[R2]

The effective address of the following instruction is , MUL 5(R1,R2)

100(decimal) is added to contents of accumulator

The instruction, ADD A, #100 performs

register instructions

The instruction, ADD A, R7 is an example of

Adds 45 to the value of R1 and stores it in R1

The instruction, Add #45,R1 does,

rotation of accumulator to left

The instruction, RLA performs

program memory

The only memory which can be accessed using indexed addressing mode is

Object file

The source file is converted into an __________ wherein it contains all the actual binary information.

Register Indirect Addressing Mode

This addressing mode allows data to be addressed at any memory location through an offset address held in any of the following registers: BP, BX, DI & SI

MOV AX, [BX]

This is an example of register Indirect Addressing Mode

2,3

When we use auto increment or auto decrement, which of the following is/are true 1) In both, the address is used to retrieve the operand and then the address gets altered. 2) In auto increment the operand is retrieved first and then the address altered. 3) Both of them can be used on general purpose registers as well as memory locations.

Register Mode

Which addressing mode execute its instructions within CPU without the necessity of reference memory for operands?

none

Which of the following is not an addressing mode of 8051?

Relative

_____ addressing mode is most suitable to change the normal sequence of execution of instructions .