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

Declarative programming languages, Declarative programming languages: ...

Declarative programming languages: We notice that declarative programming languages can have some better compensation over procedural ones. Actually, it is often said that a J

Define the three prime processes of UML, Define the three prime processes o...

Define the three prime processes of uml The three prime processes were OMT (Rumbaugh), OOSE (Jacobson) and Booch. OMT was strong in analysis, while Booch was strong in design a

Computer Architecture, As an advocate of CISC architecture to RISC architec...

As an advocate of CISC architecture to RISC architecture, what are the merits and demerits of CISC to RISC architecture

What is disadvantage of distributed systems, What is disadvantage of Dis...

What is disadvantage of Distributed systems? Ans. Reliability is disadvantage of Distributed system.

Write a short note on structure chart, Write a short note on structure char...

Write a short note on structure chart.    Structure Chart is an significant program design method and it shows all components of code in a hierarchical format

What is library, What is library? A library is a collection of classes ...

What is library? A library is a collection of classes that are useful in most of the contexts. Classes must have accurate and thorough explanations to help users.

Convert the following decimal numbers into octal, Q. Convert the following ...

Q. Convert the following DECIMAL numbers into OCTAL, double check by converting the result OCTAL to DECIMAL. a) 932 b) 4429.625 c) 19

Write shorts notes on remote procedure call, Write shorts notes on Remote P...

Write shorts notes on Remote Procedure Call (RPC) The facility whihc was created to help the programmers write client server software is termed as Remote Procedure Call. Within

Explain the synchronous-transmission, A control character is sent at the be...

A control character is sent at the beginning as well as at the end of every block in the synchronous-transmission in order to  (A) Synchronize the clock of transmitter and rece

Grapgh, representation of the adjacency matrix and adjacency list

representation of the adjacency matrix and adjacency list

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