What is LDAX instruction?

In 8085 Instruction set, LDAX is a mnemonic that stands for LoaD Accumulator from memory pointed by eXtended register pair denoted as “rp” in the instruction. It occupies only 1-Byte in the memory. This rp can be either BC register pair represented by B or DE register pair represented by D.

What is the difference between load and store operation in 8085 microprocessor?

A load operation copies data from main memory into a register. A store operation copies data from a register into main memory . When a word (4 bytes) is loaded or stored the memory address must be a multiple of four.

What is the difference between LDA and STA instructions of 8085 microprocessor?

LDA – Is for loading the accumulator. i.e) It is used to load the accumulator from the memory. (Data moves/will be copied from memory to accumulator ). STA – Is for storing the accumulator value to the memory location((Data moves/will be copied from accumulator to the memory ).

What is Sta microprocessor?

In 8085 Instruction set, STA is a mnemonic that stands for STore Accumulator contents in memory. In this instruction,Accumulator8-bit content will be stored to a memory location whose 16-bit address is indicated in the instruction as a16. This instruction occupies 3-Bytes of memory.

What is the difference between MOV and MVI instructions?

What is the difference between MOV and MVI instructions of an 8085 microprocessor? MVI instruction copies data between two registers, whereas MOV instruction transfers an immediate data into a register.

What is a MOV instruction in 8085?

In 8085 Instruction set, MOV is a mnemonic, which stands for “MOVe”. In this instruction 8-bit data value in register r2 will be moved to the 8-bit register r1. This instruction uses register addressing for specifying the data.

What is LDAX instruction in microprocessor?

Microprocessor 8085 In 8085 Instruction set, LDAX is a mnemonic that stands for LoaD Accumulator from memory pointed by eXtended register pair denoted as “rp” in the instruction. This instruction uses register indirect addressing for specifying the data. It occupies only 1-Byte in the memory.

What is the difference between LDAX and direct and indirect addressing?

The two bytes following the opcode is the direct address. On the other hand, LDAX stands for LoaD Accumulator indirect from register pair (X), and again by the name, you can tell that it uses indirect addressing. Indirect addressing uses the contents of register (s) as a memory address.

What is the meaning of LDAX d x?

In instruction, LDAX D => ‘x’ stands for register pair. it means ‘D’ is not an 8 bit CPU register but it is the notation for 16 bit register pair DE. usually register pair is noted with Higher byte of pair. here, destination is Acc =>8 bit and source is DE pair which is 16 bit.

What is an LDA (LDA)?

LDA stands for LoaD Accumulator direct, and by its name you can tell that it uses direct addressing. Direct addressing, put simply, uses a memory location that is stored as an immediate.