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

What are the testing strategies for conventional software, What are the var...

What are the various testing strategies for conventional software? i. Unit testing ii. Integration testing. iii. Validation testing. iv. System testing.

Describe the advantages of proper inheritance, Describe the advantages of p...

Describe the advantages of proper inheritance. The biggest advantages of proper inheritance are:  a.) substitutability and b.) extensibility.

What is path analysis, What is Path Analysis? Ans) Program analysis perf...

What is Path Analysis? Ans) Program analysis performed to identify all possible paths through a program, to detect incomplete paths, or to discover portions of the program that

Define metrics, Define metrics. Metrics is explained as the degree to w...

Define metrics. Metrics is explained as the degree to which a system component, or process possesses a given attribute.

Define the behavioural model, Define the Behavioural Model It defines o...

Define the Behavioural Model It defines operational behaviour of the system.  In this model, numerous operations of the system are represented in pictorial form. Tools used to

What are the tools used in system analyst, What are the Toolsused in system...

What are the Toolsused in system analyst Systems analyst have numerous tools to help them in carrying out their work. As many of their projects are for big companies it is ess

What is recovery testing, What is recovery testing? Recovery testing is...

What is recovery testing? Recovery testing is a system test that forces the software to fail in a various of ways and verifies that recovery is properly done.

Explain the term- system maintenance, Explain the term- System Maintenance ...

Explain the term- System Maintenance update hardware as new items come on market or company changes in any way which requires new devices to be updated/added Update sof

List the guidelines for data design, List the guidelines for data design. ...

List the guidelines for data design. i. Apply systematic analysis on data. ii. Determine data structures and related operations. iii. Establish data dictionary. iv. Us

What is test log, What is Test log? A chronological record of all releva...

What is Test log? A chronological record of all relevant details about the implementation of a test.

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