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

What are the advantages offered by data mining, What are the advantages off...

What are the advantages offered by data mining? Advantages offered through Data Mining are given below: a) Facilitates discovery of knowledge through massive, large data set

How to creating a key pair, How to Creating a Key Pair You can make a...

How to Creating a Key Pair You can make a key pair using the Strong Name tool (Sn.exe). Key pair files usually have an .snk extension. To create a key pair at the command

Define seek time and latency time, Define seek time and latency time. ...

Define seek time and latency time.  The time taken by the head to move to the appropriate cylinder or track is known as seek time. Once the head is at right track, it must wai

Fixed arithmetic pipelines, Fixed Arithmetic pipelines  We obtain the e...

Fixed Arithmetic pipelines  We obtain the example of multiplication of fixed numbers. The Two fixed-point numbers are added by the ALU using shift and add operations. This sequ

Difference between field-group header and other field groups, What is the d...

What is the difference between field-group header and other field groups? The header field group is a particular field group for the sort criteria.  The system automatically p

Describe the external users of system, Q. Describe the External Users of sy...

Q. Describe the External Users of system? External Users: Modern information systems are now reaching beyond the boundaries of traditional business to involve customers and o

Objectives of parallel computing, Objectives of Parallel Computing Aft...

Objectives of Parallel Computing After reading this topic, you would be able to: Tell historical details of parallel computing; Explain the fundamental ideas of dis

Explain the essential elements of electronic data interchang, What are the ...

What are the essential elements of Electronic Data Interchange. The necessary elements of Electronic Data Interchange (EDI) are: The use of an electronic transmission me

Calculate the switching elements in a two stage network, In a two stage ne...

In a two stage network there are 512 inlets and outlets, r=s=24. If the probability that a given inlet is active is 0.8, calculate: the switching elements Given: N =M =512,

What is the need of a hybrid in telephone networks, What is the need of a h...

What is the need of a hybrid in telephone networks? Digital exchanges need receive and transmit signals upon separate two-wire circuits. It calls for two-wire to four-wire con

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