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What is the addressing mode of the instruction MOV A A?
This addressing mode is named as “immediate” because it transfers an 8-bit data immediately to the accumulator (destination operand). The picture above describes the above instruction and its execution. The opcode for MOV A, # data is 74H. The opcode is saved in program memory at 0202 address.
What is the addressing mode of Movc a A DPTR instruction?
MOVXA, @R1; [email protected], A; In these two instructions, the X in MOVX indicates the external data memory. The external data memory can only be accessed in register indirect mode. In the first instruction if the R0 is holding 40H, then A will get the content of external RAM location40H.
What is the addressing mode of the instruction?
Addressing Modes– The term addressing modes refers to the way in which the operand of an instruction is specified. The addressing mode specifies a rule for interpreting or modifying the address field of the instruction before the operand is actually executed.
What addressing mode is used?
Applications of Addressing Modes-
|Index Addressing Mode||For array implementation or array addressing For records implementation|
|Base Register Addressing Mode||For writing relocatable code i.e. for relocation of program in memory even at run time For handling recursive procedures|
What is the addressing mode used in instruction MOV M C?
Indirect addressing mode
Indirect addressing mode In this mode, the data is transferred from one register to another by using the address pointed by the register. For example, MOV A, M: means data is transferred from the memory address pointed by the register pair HL to the register A.
Which addressing mode is being used in the given instruction mov ax 1234H?
register addressing mode
The instruction, MOV AX, 1234H is an example of. register addressing mode.
What is Movc instruction?
The MOVC instruction moves a byte from the code or program memory to the accumulator. See Also: MOV, MOVX. MOVC A, @A+DPTR. C. AC.
Which addressing mode is mov a 30H?
Direct addressing mode: Ex: MOV A, 30H => Content of RAM address 30H is copied into Accumulator.
What are the different types of addressing mode?
Addressing modes in 8085 microprocessor
- Immediate Addressing Mode – In immediate addressing mode the source operand is always data.
- Register Addressing Mode –
- Direct Addressing Mode –
- Register Indirect Addressing Mode –
- Implied/Implicit Addressing Mode –
What addressing mode is used in instruction MOV B C and MOV a M?
Indirect addressing mode For example, MOV A, M: means data is transferred from the memory address pointed by the register pair HL to the register A.
What addressing mode is used in the instruction LDA 0345h?
This instruction uses absolute addressing for specifying the data.
Which is the operand in immediate addressing mode?
In immediate addressing mode the source operand is always data. If the data is 8-bit, then the instruction will be of 2 bytes, if the data is of 16-bit then the instruction will be of 3 bytes. In register addressing mode, the data to be operated is available inside the register (s) and register (s) is (are) operands.
When does an instruction go to an address in indirect mode?
Indirect Mode. The register or memory location that contains the address of the operand is a pointer. When an execution takes place in such mode, instruction may be told to go to a specific address. Once it’s there, instead of finding an operand, it finds an address where the operand is located.
Which is the correct definition of the addressing mode?
The addressing mode is the method to specify the operand of an instruction. An effective address is the location of an operand which is stored in memory. Immediate: The operand is included in the instruction. Direct: The effective address of the operand in memory is part of the instruction.
How is data specified in implied addressing mode?
Implied mode:: In implied addressing the operand is specified in the instruction itself. In this mode the data is 8 bits or 16 bits long and data is the part of instruction.Zero address instruction are designed with implied addressing mode.