DI is used as an offset address for string instruction destinations in the microprocessors.
EAX
program counter is a register that has the address of next instruction that has to be executed after currently executing instruction. it is used for proper execution of functions of computer by providing address of next instruction to microprocessor.
It is register addressing mode, as it moves the content of HL to PC which is data and not address.
In the 8086 microprocessor, the register that stores the interrupt and subroutine return address is the Instruction Pointer (IP) register. When an interrupt occurs or a subroutine is called, the current instruction address is pushed onto the stack, allowing the processor to return to that location after the interrupt or subroutine execution is complete. The IP register works in conjunction with the Code Segment (CS) register to determine the effective address of the next instruction to execute.
In the 8086 microprocessor, code segment addresses are generated using a segment:offset addressing scheme. The code segment (CS) register holds the starting address of the code segment, while the instruction pointer (IP) register holds the offset of the next instruction to be executed within that segment. The effective address of an instruction is calculated by adding the value in the CS register (shifted left by 4 bits) to the value in the IP register, allowing for a total addressable space of 1 MB. This segmentation allows for efficient memory management and organization of code.
DI is the Index register in Data segment(16-bit, 64 KB) .Destination Index (DI) is a 16-bit register. DI is used for indexed, based indexed and register indirect addressing, as well as a destination data address in string manipulation instructions.
The address bus is a section of the bus that emits the address of the desired instruction or operand.
The function of the program counter register is to hold the address of the instruction that is being executed and (later) to hold the address of the instruction that will be executed next.
fetch SHLD opcode bytefetch direct address least significant bytefetch direct address most significant bytewrite L register contents byte to memorywrite H register contents byte to memory
The Instruction Pointer (IP) in an 8086 microprocessor contains the address of the next instruction to be executed. The processor uses IP to request memory data from the Bus Interface Unit, and then increments it by the size of the instruction.
To move the content of a register to memory, you typically use the MOV instruction in assembly language. The syntax generally involves specifying the destination (memory address) and the source (register). For example, in x86 assembly, you might write MOV [memory_address], register_name. This instruction transfers the data from the specified register into the designated memory location.
actually register holds the data..there are 6 register which are temporary registers..program counter holds the address of next instruction to be fetched..instruction register holds the currently executed data...