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 is security testing, What is security testing? Security testing at...

What is security testing? Security testing attempts to determine that protection mechanism built into a system will protect it from improper penetration.

What is outputs, What is Outputs? Ans) Products, services, or informatio...

What is Outputs? Ans) Products, services, or information supplied to meet end user requirements.

Usual stages of the simplified design process, Q. Usual stages of the simpl...

Q. Usual stages of the simplified design process? Pre-production design Design brief it is an early often the beginning statement of design goals Analysis i

What is a vertical microinstruction, What is a vertical microinstruction? ...

What is a vertical microinstruction? Ans) A vertical microinstruction is a microinstruction that states one of a sequence of operations required to carry out a machine language

What is dfd, What is DFD? Data Flow Diagram depicts the information flo...

What is DFD? Data Flow Diagram depicts the information flow and the transforms that are applied on the data as it moves from input to output.

Explain the phased waterfall model, Explain the Phased Waterfall Model ...

Explain the Phased Waterfall Model It is a type of waterfall model where the project is separated into small phases and delivered at intervals by dissimilar teams. Different Te

Data dictionary , data dictionary of online banking system

data dictionary of online banking system

Define entity and relationship diagram, State Entity and relationship diagr...

State Entity and relationship diagram. ERD depicts linkage between data objects. The ERD is the notation that is used to execute the data modelling activity. The primary

State the system engineering hierarchy, State the System Engineering Hierar...

State the System Engineering Hierarchy? The world view is composed of a set of domains (Di), which can each be a system, or system of systems. WV = {D1,D2,D3,...........,Dn}

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