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What do mean by operands in microprocessor?
An opcode is a single instruction in assembly language. An operand is the data it does something with.For example, in "MOV r0, #0C", MOV is the opcode ("move this value into this register"), while r0 (register 0) and #0C (the number 12) are operands.
What is 3 byte instruction in microprocessor?
A two-byte instruction gives the specific function instruction in two bytes, or two words. The first specifies the opcode, which tells the microprocessor what operation will occur. The second specifies the operand, or the data that the operation is done on.
IS OPCODE FETCH MACHINE CYCLE ENOUGH FOR THE INTRUCTION MOV MA IN 8085 TIMING DIAGRAM?
In the 8085 microprocessor, the opcode fetch machine cycle is not sufficient on its own for executing the MOV MA instruction. While the opcode fetch cycle is responsible for retrieving the instruction from memory, additional machine cycles are required to perform the data transfer or execution of the instruction. Specifically, the MOV MA instruction involves both an opcode fetch cycle and a memory access cycle to complete the operation. Therefore, multiple machine cycles are necessary for executing this instruction effectively.
Will mov instruction move the data or copy the data?
The mov instruction in assembly language typically copies data from one location to another. It takes the value from the source operand and places it into the destination operand. The original data at the source location remains unchanged; hence, it is a copy rather than a move in the sense of removing the data from the source.
8085 microprocessor state the number of machine cycles and t-states required to complete the execution of the 8085 instruction mov m a?
The 8085 instruction MOV M,A requires two machine cycles and 7 T states. Cycle one is 3 T states for opcode fetch, plus 1 T state for opcode decode. Cycle two is 3 T state for operand store. These numbers do not include WAIT states. WAIT states are interposed between T2 and T3 of any memory access cycle, and the total number of WAIT states depends on the READY line.
List different address modes of 8051micro controller with example?
The 8051 microcontroller employs several addressing modes, including: Immediate Addressing Mode: The operand is specified in the instruction itself. Example: MOV A, #25H moves the hexadecimal value 25 into the accumulator. Register Addressing Mode: The operand is in a register. Example: MOV A, R0 moves the content of register R0 into the accumulator. Direct Addressing Mode: The operand's address is given directly in the instruction. Example: MOV A, 30H moves the content of memory location 30H into the accumulator. Indirect Addressing Mode: The address of the operand is held in a register. Example: MOV A, @R1 moves the content of the memory location pointed to by register R1 into the accumulator.
MOV Cx 1234H instruction belongs to which addressing mode?
The instruction MOV Cx, 1234H uses the immediate addressing mode. In this mode, the operand (1234H) is specified directly within the instruction itself. The value 1234H is moved directly into the CX register, making it an example of immediate data being loaded into a register.
What is the different between MOV and MVI in 8085?
In the 8085 microprocessor, the MOV instruction copies data between two registers, or between a register and memory. The MVI instruction differs only in that the source data is contained in the byte immediately following the opcode byte.
What is the possible machine instruction equivalent to mov bx 24?
The instruction mov bx, 24 in assembly language moves the immediate value 24 into the BX register. The possible machine instruction equivalent for this operation, assuming a 16-bit x86 architecture, would typically involve an opcode for moving an immediate value into a register, such as B8 18 00, where B8 is the opcode for moving an immediate value into the AX register, and 18 00 represents the little-endian format of the number 24. However, for the BX register specifically, the opcode would be BB, resulting in a machine code like BB 18 00.
What do you meant by single word instructions?
those which have single operand e.g mov A
How many bytes are required MOV A?
The instruction MOV A in assembly language typically requires 1 byte. This instruction is used to move data into the accumulator register (A) from another register or memory location, but the specific number of bytes may depend on the context, such as the source operand being specified. In many assembly languages, the instruction itself is one byte, while additional bytes may be needed for operands.
Why mov R1R2 is invalid instruction?
mov r1r2 is invalid instruction because of there is no communication with ALU in its operation;
