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

Explain working of code inspectors, Q. Explain working of Code inspectors? ...

Q. Explain working of Code inspectors? Code inspectors A code inspector does a simple job of enforcing standards in a uniform way for many programs. These are able to be sing

Explain exploratory testing, Explain exploratory testing. - In explorat...

Explain exploratory testing. - In exploratory testing approach testers are included in minimum planning and maximum test execution. - The planning contains creation of a tes

Define maintenance, Define maintenance. Maintenance is explained as the...

Define maintenance. Maintenance is explained as the process in which changes are executed by either modifying the existing system's architecture or by adding latest components

What are the types of static testing tools, What are the types of static te...

What are the types of static testing tools? There are three kinds of static testing tools.  Code based testing tools - These tools take source code as input and get test cases.

Static testing tools and dynamic testing tools, Static testing tools: 1...

Static testing tools: 1. Static analysers   2. Code inspectors  3. Standard Dynamic testing tools   1. Coverage analyzers (execution verifiers)    2. Output co

Define verification and validation, Define Verification &Validation. V...

Define Verification &Validation. Verification: The set of activities that make sure that software correctly executes a specific function. Validation: The set of activiti

What is equivalence partitioning, Equivalence Partitioning: -Equivalence pa...

Equivalence Partitioning: -Equivalence partitioning is black box testing method that separates the input domain of a program into classes of data from which test cases can be deriv

Draw the context level dfd for the safe home software, Draw the Context lev...

Draw the Context level DFD for the Safe home Software. User commands Alarm type Telephone Number tone Sensor status Display Information

Define capability, Define capability. What are the quantities that determin...

Define capability. What are the quantities that determine the degree of capability of a software reliability model? Capability refers to the ability of the model to calculate w

What is process involved in maturity levels in seis cmm, What is process in...

What is process involved in maturity levels in SEIs CMM. Level 1: Initial - a small number of processes are defined and individual efforts are taken. Level 2: Repeatable - T

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