What is LXI H in microprocessor?
We can use this instruction to load data from memory location using the memory address, which is stored in the register pair rp. For an example, if the instruction is LXI H, FE50. It means that the FE50 is loaded into the HL register pair.
What is a function of MVI A 57h?
In 8085 Instruction set, this instruction MVI M, d8 is used to load a memory location pointed by HL pair with an 8-bit value directly. This instruction uses immediate addressing for specifying the data.
How does CMP work in 8085?
The 8085 instruction set has two types of Compare operations: Compare with accumulator (CMP) and Compare immediate with accumulator (CPI). This is a 1-byte instruction. It compares the data byte in the register or memory with the contents of accumulator. If A less than (R/M), the CY flag is set and Zero flag is reset.
What is the output of LXI H 2050H?
LXI H,2050H L=50H H=20H LXI instruction takes 3 bytes of memory and 10 clock periods.
How many bytes are required for LDA 2000h?
Summary − So this instruction LDA 4050H requires 3-Bytes, 4-Machine Cycles (Opcode Fetch, Memory Read, Memory Read, Memory Read) and 13 T-States for execution as shown in the timing diagram.
How many bytes is MOV AB?
MOV E, H is an example instruction of this type. It is a 1-Byte instruction….Instruction type MOV r1, r2 in 8085 Microprocessor.
| Mnemonics, Operand | Opcode | Bytes |
|---|---|---|
| MOV A, B | 78 | 1 |
| MOV A, C | 79 | 1 |
| MOV A, D | 7A | 1 |
| MOV A, E | 7B | 1 |
How many T states are there in MOV AB?
Only opcode fetching is required for this instruction and thus we need 4 T states for the timing diagram.
What is MOV AB?
In assembly language, instruction MOV A B. means moving the content of B (source) to A (destination).
How many machine cycles are there in MOV AB?
The instruction MOV A,B is a 1-byte instruction. Microprocessor takes only one machine cycle (op-code fetch) to complete instruction. Hence, hex code for MOV A,B is passed to the microprocessor.
How many and what are the machine cycles needed for execution of mov’d C?
Answer : 235)How many and what are the machine cycles needed for execution of MOV D, C? Answer : 236)Which of the following register pairs can be directly stored in memory?
What is the purpose of MOV instruction?
The mov instruction copies the data item referred to by its second operand (i.e. register contents, memory contents, or a constant value) into the location referred to by its first operand (i.e. a register or memory).
What is function of the MOV A?
An MOV is a voltage dependent device which has an electrical behavior similar to back to back zener diodes. changes from a near open circuit to a very low value, thus clamping the transient voltage to a safe level. pulse is absorbed by the Varistor, thereby protecting vulnerable circuit components.
What is wrong with MOV DS SS?
7. The MOV ds,ss instruction is wrong because segment to segment transfer is not allowed.
What is the difference between MOV and Lea?
The MOV instruction is a ‘MOVe’ effectively a copy of the address that the TABLE-ADDR label stands for. The LEA instruction is a ‘Load Effective Address’ which is an indirected instruction, which means that TABLE-ADDR points to a memory location at which the address to load is found.
What does MOV DS ax mean?
DATA is not an instruction, but a pseudo-instruction. It is actually a dynamic memory address. To run, it must be placed in DS first, but the memory number cannot be placed in the segment address.