Explain status and control registers, Computer Engineering

Assignment Help:

Q. Explain Status and Control Registers?

For control of numerous operations several registers are used. These registers can't be used in data manipulation though content of some of these registers can be used by programmer. One of the control registers for a von-Neumann machine is the Program Counter (PC).

Almost all the CPUs have a status register a part of which may be programmer visible. A register that may be formed by condition codes is called condition code register. Some of the commonly employed flags or condition codes in such a register may be:

1650_Explain Status and Control Registers.png

These flags are set by CPU hardware while performing an operation. For illustration an addition operation can set overflow flag or on a division by 0 the overflow flag can be set etc. These codes can be tested by a program for a typical conditional branch operation. Condition codes are collected in one or more registers. RISC machines have various sets of conditional code bits. In these machines, an instruction specifies the set of condition codes that is to be used. Independent sets of condition code allow provisions of having parallelism within the instruction execution unit. 

Flag register is frequently called as Program Status Word (PSW). It comprises condition code and other status information. There can be numerous other status and control registers like interrupt vector register in machines employing vectored interrupt or stack pointer if a stack is used to implement subroutine calls etc.


Related Discussions:- Explain status and control registers

Algorithm of non-repudiation designing e-cash based system, Give a suitable...

Give a suitable algorithm of non-repudiation in designing e-cash based system. The algorithm of non-repudiation in designing e-cash based system is as illustrated below: Ke

Define user space, Define user space? The system space is divided from ...

Define user space? The system space is divided from virtual address space in which the user application programs reside. The letter space is known as user space.

EME, How can i made Carnot engine

How can i made Carnot engine

Explain the working of broad band isdn, Explain the working of broad band I...

Explain the working of broad band ISDN. BISDN Configuration: Figure shows how access to the BISDN network is accomplished. All peripheral devices are interfaced to the acces

Fully parallel associative processor (fpap), Fully Parallel Associative Pro...

Fully Parallel Associative Processor (FPAP):  This processor accepts the bit parallel memory organisation. FPAP has two type of this associative processor named as: Word Org

Feature of micro-instruction execution, Q. Feature of micro-instruction exe...

Q. Feature of micro-instruction execution? Feature of micro-instruction execution is micro-instruction sequencing which involves address calculation of next micro-instruction.

The concept of thread-parallel computing, The Concept of Thread Thread ...

The Concept of Thread Thread is a chronological flow of control within a process. A process can include one or more threads. Threads have their own register values and program

What is synchronous transmission, What is synchronous transmission? In ...

What is synchronous transmission? In synchronous transmission the two units share a common frequency and bits are transmitted continuously at the rate dictated  by clock pulses

Evaluate total expense of algorithm, Q. Evaluate Total expense of algorithm...

Q. Evaluate Total expense of algorithm? Lastly, the total expense of algorithm is a product of the total number of processors required for computation and time complexity of th

Represent negative numbers in the computer system, Q. What are the values o...

Q. What are the values of x, y, and z. (1011.001101)2 = (x)10 = (y)8 = (z)16 Q. What are the various ways to represent Negative Numbers in the Computer system?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd