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

Define the aims of program generation activity, Program generation activity...

Program generation activity aims at? Ans. At automatic generation of program the program generation activity aims.

Explain network security, Explain network security. Network security me...

Explain network security. Network security means the security of networks and their services from unauthorized access, changes, destruction or disclosure. It gives for assuranc

What is a digital comparator, What is a digital comparator? Ans: ...

What is a digital comparator? Ans: Digital Comparator: The comparison of two numbers is an operation which evaluates if one number is greater than, less than, or equival

How many instructions in a computer, Q. How many instructions in a Computer...

Q. How many instructions in a Computer? A computer can have a vast number of instructions and addressing modes. Older computers with the growth of Integrated circuit technolog

Classification of digital computer, CLASSIFICATION  OF DIGITAL COMPUTER ...

CLASSIFICATION  OF DIGITAL COMPUTER Computer are classified under a number of factors.Some people classify them according to their processing speed.main memory,technology used

Use of overlapped register windows, Q. Use of Overlapped Register Windows? ...

Q. Use of Overlapped Register Windows? Register file comprises 138 registers. Let them be called by register number 0 - 137.  Diagram demonstrates the use of registers: when

A global variable is a variable, A global variable is a variable A globa...

A global variable is a variable A global variable is declared outside the body of each function.

Processor-memory interconnection network (pmin), Processor-Memory Interconn...

Processor-Memory Interconnection Network (PMIN) This is a switch that joined various processors to different memory modules. Connecting every processor to each memory module in

Show error detection mechanism, Q. Show Error detection mechanism? Erro...

Q. Show Error detection mechanism? Error detection mechanism can be described as below: Figure: Error detection and correction

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