The Instruction Register contains the current instruction being executed. It is an internal, special register, and you can not do anything explicit with it.
If you are referring to the Program Counter, that simply contains the address of the next instruction to execute. It is incremented for each opcode and operand byte fetched.
instruction register
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...
Clock
If 8 or 16 bit data is required for executing the instruction present in register/register pair and named of register/register pair is given along the register.this instruction is called register addressing mode instruction.for example:MOV B,A
Fetch
An Instruction Buffer Register is also known as IBR. It registers a computer's processor or its Central Processing Unit (CPU).
yes
There is no PC register in the 8086/8088. It is called the IP register by Intel and it stands for the Instruction Pointer. It contains the address of the current/next instruction to be executed.
stack segment register
The Instruction Register (IR) stores the instruction currently being executed. In simple processors each instruction to be executed is loaded into the instruction register which holds it while it is decoded, prepared and ultimately executed.
Block diagram of the von Neumann architecture: MQ, multiplier quotient register; IR, instruction register; IBR, instruction buffer register; MAR, memory address register; MDR, memory data register
instruction register is used to store the next instruction to be executed. instruction pointer is used to store the address of the next instruction to be executed.