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It is a memory register inside the CPU. The function is to hold the current microinstruction. The microinstruction is the bits that drive the control signal and drive the data path.
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What is microinstruction execution?
A microinstruction executing system includes a sequencer for controlling sequential readout of microinstructions from a ROM for storage in a microinstruction register and for subsequent decoding by a decoder.
What is the function of the register MAR?
it store address.
Function of flag register?
The main function of flag register is show the status of result stored in accumulator after execution of an instruction. Amar oli Dang,Nepal
What is the function of the PC register in the 8086 CPU?
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.
What is the function of the program counter register?
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.
6 What is the role of a Micro sequencer in Microprogramming Control Unit?
In computer architecture and engineering, a sequencer or microsequencer is a part of the control unit of a CPU. It generates the addresses used to step through themicroprogram of a control store.Usually the addresses are generated by some combination of a counter, a field from a microinstruction, and some subset of the instruction register. A counter is used for the typical case, that the next microinstruction is the one to execute. A field from the microinstruction is used for jumps, or other logic.Since CPUs implement an instruction set, it's very useful to be able to decode the instruction's bits directly into the sequencer, to select a set of microinstructions to perform a CPU's instructions.Most modern CPUs are considerably more complex than this description suggests. They tend to have multiple cooperating micromachines with specialized logic to detect and handle interference between the micromachines.
What is the function of accumulator 8085?
It is an 8 bit register which is accessable to programmer and is main fuction is to perfom all arithmetic and logical function.
What is the function of Data Register?
holds 16 bit data just fetched from the memory
How formal arguments are stored in function?
On the stack; they are addressed via register SP or BP.
Difference between register variable and automatic variables?
Register variables are stored in register of microprocessor/micro-controller. The read/write access to register variable is the fastest because CPU never need any memory BUS operation to access these variable. Auto variable are stored in stack thus access are much slower. Auto variable can be converted to register by using register keyword before it. It has platform specific limitation. Register variable will work only if free registers are available to hold the variable for a function scope. In case of Microprocessor or microcontrollers having very less number of general purpose registers will never take register variable even if we declare it as register.
Definition or function of CX register?
The CX register is a 16-bit register in the x86 architecture that is primarily used for counting operations, particularly in string manipulation and looping functions. It is part of the general-purpose registers in the CPU and can store values ranging from 0 to 65,535.
What are register variables What are the advantage of using register variables?
Asks the compiler to devote a processor register to this variable in order to speed the program's execution. The compiler may not comply and the variable looses it contents and identity when the function it which it is defined terminates.
