two fetch-execute cycles, Software Engineering

Assignment Help:

Consider an 8-bit system with 32 memory locations (numbered from 0 to 31) and 8 different instructions. Assume op code for "Load Accumulator" instruction is 510 and for "Add" instruction is 210. At this moment, the program counter register PC contains the value 00100 and is about to increment, memory locations contain the following values:   

Address Contents
01101   00110110
01100   01110100
01011   10111000
:
00110   01001100
00101   10101011
00100   01111000

Perform two fetch-execute cycles, present each step of the cycles and the contents of each special-purpose register at the beginning and at the end of each step of the cycles in binary. If you believe there is no information on the contents of a particular register, indicate it as [unknown] (e.g., MDR[unknown]). If overflow occurs, the MSB is stored in a single-bit flag register and not counted in Accumulator. Express the final contents of Accumulator in both binary and decimal. For your answer, use the following table (two first lines are given as sample):

Step

PC

MAR

MDR

IR

A

PC→MAR                beginning

00101

[unknown]

[unknown]

[unknown]

[unknown]

                                          end

00101

00101

[unknown]

[unknown]

[unknown]


Related Discussions:- two fetch-execute cycles

Star topology, where star topology used in daily life

where star topology used in daily life

Determine the various levels of testing, Determine the various levels of te...

Determine the various levels of testing The following are various levels of testing: Large systems are built out of subsystems which are made up of modules, modules of funct

Differentiate between failures and faults, Differentiate between failures a...

Differentiate between failures and faults.   Failure:- Failure is the departure of external results of program operation from requirements. So failure is dynamic. Failure can

Why software change happens, Why software change occurs? Software chang...

Why software change occurs? Software change occurs because of the following reasons. New requirements appear when the software is used. The business atmosphere changes. E

Software methodology, how to choose a software methodology for a software p...

how to choose a software methodology for a software project

Explain code walkthrough, A manual testing [error detection] method where p...

A manual testing [error detection] method where program [source code] logic [structure] is traced manually [mentally] by a group with a small set of test cases, whereas the state o

What are repositories used by qtp to store object properties, What are repo...

What are repositories used by QTP to store object properties? QTP uses two kinds of repositories to store object properties. a.) Shared object repository: A global object

How will you view gui maps in winrunner, How will you view GUI maps in Winr...

How will you view GUI maps in Winrunner? - GUI maps are viewed by using GUI Map Editor - It's located in Tools menu within WinRunner. - It displays all of the GUI Map fil

Water-fall model of the system development life cycle, Problem: (a) Bri...

Problem: (a) Briefly describe the "water-fall" model of the system development life cycle. (b) How would intranets be useful in a Public Sector Environment? (c) How can p

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