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A simulation for a Von Nuemann based Computer Architecture using Java

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fillet-o-neumann

example workflow

Description

A simulation for a Von Neumann based Computer Architecture using Java.

Main Memory Architecture

A von neumann Architecture in which program data and instruction data are stored in the same memory
Main Memory Size 2048 * 32 from 0 to 1023 for instructions and from 1024 to 2047 for data

Registers

  • 31 General purpose Registers from R1 to R31
  • 1 Zero Registers named R0
  • 1 program counter PC Registers Size 32 bits

Instruction Architecture

Instruction Set supported
Name Format Operation
ADD ADD R1 R2 R3 R1 = R2 + R3
SUB SUB R1 R2 R3 R1 = R2 - R3
MUL MUL R1 R2 R3 R1 = R2 * R3
MOVI MOVI R1 IMM R1 = IMM
JEQ JEQ R1 R2 IMM\label IF(R1 == R2) {PC = PC+1+IMM\ PC = label }
AND AND R1 R2 R3 R1 = R2 & R3
XORI XORI R1 R2 IMM R1 = R2 ⊕ IMM
JMP JMP ADDRESS PC = PC[31:28]
LSL LSL R1 R2 SHAMT R1 = R2 << SHAMT
LSR LSR R1 R2 SHAMT R1 = R2 >>> SHAMT
MOVR MOVR R1 R2 IMM R1 = MEM[R2 + IMM]
MOVM MOVM R1 R2 IMM MEM[R2 + IMM] = R1

Datapath

Stages: 5

  • Instruction Fetch (IF)
  • Instruction Decode (ID)
  • Execute (EX)
  • Memory (MEM)
  • Write Back (WB)

Pipeline: maximum 4 instructions running in parallel (IF) and (MEM) cannot be done in parallel.

Project Structure

project structure
 .
├── Dockerfile
├── Makefile
├── pom.xml
├── README.md
├── run.sh
├── src
│  ├── main
│  │  ├── java
│  │  │  └── fillet
│  │  │     ├── App.java
│  │  │     ├── exceptions
│  │  │     │  ├── AddressOutOfRangeException.java
│  │  │     │  ├── InvalidInstructionException.java
│  │  │     │  ├── InvalidRegisterException.java
│  │  │     │  └── InvalidRegisterNumberException.java
│  │  │     ├── instructions
│  │  │     │  ├── HaltInstruction.java
│  │  │     │  ├── ImmediateInstruction.java
│  │  │     │  ├── Instruction.java
│  │  │     │  ├── InstructionFactory.java
│  │  │     │  ├── InstructionType.java
│  │  │     │  ├── JumpInstruction.java
│  │  │     │  └── RegisterInstruction.java
│  │  │     ├── logger
│  │  │     │  ├── destinations
│  │  │     │  │  ├── ConsoleLogger.java
│  │  │     │  │  ├── FileLogger.java
│  │  │     │  │  └── LogObserver.java
│  │  │     │  ├── Logger.java
│  │  │     │  ├── LogSubject.java
│  │  │     │  ├── outputs
│  │  │     │  │  ├── run-02-06-2022-15-04-37.log
│  │  │     │  │  ├── run-02-06-2022-23-11-07.log
│  │  │     │  │  ├── run-02-06-2022-23-11-36.log
│  │  │     │  │  ├── run-02-06-2022-23-53-15.log
│  │  │     │  │  └── run-04-06-2022-11-47-52.log
│  │  │     │  └── services
│  │  │     │     ├── ColorStringService.java
│  │  │     │     ├── CreateLogFileService.java
│  │  │     │     ├── GenerateTableService.java
│  │  │     │     ├── InitLoggerService.java
│  │  │     │     ├── LogEntityService.java
│  │  │     │     └── SegmentType.java
│  │  │     ├── memory
│  │  │     │  ├── MainMemory.java
│  │  │     │  └── RegisterFile.java
│  │  │     ├── operations
│  │  │     │  ├── haltoperations
│  │  │     │  │  ├── Halt.java
│  │  │     │  │  ├── HaltOperation.java
│  │  │     │  │  └── HaltOperationFactory.java
│  │  │     │  ├── immediateoperations
│  │  │     │  │  ├── ImmediateOperation.java
│  │  │     │  │  ├── ImmediateOperationFactory.java
│  │  │     │  │  ├── JumpIfEqual.java
│  │  │     │  │  ├── MoveImmediate.java
│  │  │     │  │  ├── MoveToMemory.java
│  │  │     │  │  ├── MoveToRegister.java
│  │  │     │  │  └── XORImmediate.java
│  │  │     │  ├── jumpoperations
│  │  │     │  │  ├── Jump.java
│  │  │     │  │  ├── JumpOperation.java
│  │  │     │  │  └── JumpOperationFactory.java
│  │  │     │  ├── Operation.java
│  │  │     │  ├── OperationFactory.java
│  │  │     │  ├── OperationType.java
│  │  │     │  └── registeroperations
│  │  │     │     ├── Add.java
│  │  │     │     ├── And.java
│  │  │     │     ├── LogicalShiftLeft.java
│  │  │     │     ├── LogicalShiftRight.java
│  │  │     │     ├── Multiply.java
│  │  │     │     ├── RegisterOperation.java
│  │  │     │     ├── RegisterOperationFactory.java
│  │  │     │     └── Sub.java
│  │  │     ├── programs
│  │  │     │  ├── caProgram.txt
│  │  │     │  ├── empty-file.txt
│  │  │     │  ├── final-isA.txt
│  │  │     │  ├── negative-jump.txt
│  │  │     │  ├── program1.txt
│  │  │     │  ├── spicy-iprogram.txt
│  │  │     │  ├── spicy-jprogram.txt
│  │  │     │  ├── spicy-rprogram.txt
│  │  │     │  └── test-sum.txt
│  │  │     ├── signals
│  │  │     │  └── Signals.java
│  │  │     └── utils
│  │  │        ├── Binary.java
│  │  │        ├── Decoder.java
│  │  │        ├── Parser.java
│  │  │        ├── Path.java
│  │  │        └── Program.java
│  │  └── resources
│  └── test
│     └── java
│        └── tests
│           ├── DecoderTest.java
│           ├── ImmediateInstructionTest.java
│           ├── InstructionFactoryTest.java
│           ├── JumpInstructionTest.java
│           ├── MainMemoryTest.java
│           ├── ParserTest.java
│           ├── RegisterFileTest.java
│           └── RegisterInstructionTest.java
└── target

Features

  • Parser handles labels. 💥
  • Parser handles comments. ######
  • A logger, not only outputs to the console but also outputs a log file named after the current time stamp.
  • The code is thoroughly tested by JUnit 5.
  • Used CI in the whole process. example workflow
  • We used a containerized environment using Docker 🐳.
  • We used Maven as a build system and dependency manager. Maven Central
  • We applied some spectacular design patterns such as: 
    • Singleton 
    • Observer
    • Command
    • Factory
    • Decorator

Technologies

Technology Description
Java A hated programming langauge 👎
Maven A build tool and dependancy manager
Junit 5 Java testing framework
Docker 🐳 Container

How to test?

> make test

> mvn test

Test Using Docker

Docker will guarantee more consistency and make sure you are in a isolated enviroment and not affected by your local machine

> docker build -t fillet . 
> docker run fillet                                                                                                                                       

or even

> make docker-test

How to run the project

> mvn compile exec:java -Dexec.mainClass=fillet.App

Example log

Example
	
+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    1     |  instruction 1   |  -------------   |  -------------   |  -------------   |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    2     |  -------------   |  instruction 1   |  -------------   |  -------------   |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    3     |  instruction 2   |  instruction 1   |  -------------   |  -------------   |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    4     |  -------------   |  instruction 2   |  instruction 1   |  -------------   |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    5     |  instruction 3   |  instruction 2   |  instruction 1   |  -------------   |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    6     |  -------------   |  instruction 3   |  instruction 2   |  instruction 1   |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    7     |  instruction 4   |  instruction 3   |  instruction 2   |  -------------   |  instruction 1   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    8     |  -------------   |  instruction 4   |  instruction 3   |  instruction 2   |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    9     |  instruction 5   |  instruction 4   |  instruction 3   |  -------------   |  instruction 2   |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 1 set to -131072



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    10    |  -------------   |  instruction 5   |  instruction 4   |  instruction 3   |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    11    |  instruction 6   |  instruction 5   |  instruction 4   |  -------------   |  instruction 3   |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 2 set to 131071



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    12    |  -------------   |  instruction 6   |  instruction 5   |  instruction 4   |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    13    |  instruction 7   |  instruction 6   |  instruction 5   |  -------------   |  instruction 4   |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 3 set to 3



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    14    |  -------------   |  instruction 7   |  instruction 6   |  instruction 5   |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    15    |  instruction 8   |  instruction 7   |  instruction 6   |  -------------   |  instruction 5   |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 4 set to 4



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    16    |  -------------   |  instruction 8   |  instruction 7   |  instruction 6   |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    17    |  instruction 9   |  instruction 8   |  instruction 7   |  -------------   |  instruction 6   |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 5 set to 5



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    18    |  -------------   |  instruction 9   |  instruction 8   |  instruction 7   |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    19    |  instruction 10  |  instruction 9   |  instruction 8   |  -------------   |  instruction 7   |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 6 set to -6



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    20    |  -------------   |  instruction 10  |  instruction 9   |  instruction 8   |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    21    |  instruction 11  |  instruction 10  |  instruction 9   |  -------------   |  instruction 8   |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 7 set to -7



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    22    |  -------------   |  instruction 11  |  instruction 10  |  instruction 9   |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    23    |  instruction 12  |  instruction 11  |  instruction 10  |  -------------   |  instruction 9   |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 31 set to 31



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    24    |  -------------   |  instruction 12  |  instruction 11  |  instruction 10  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    25    |  instruction 13  |  instruction 12  |  instruction 11  |  -------------   |  instruction 10  |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    26    |  -------------   |  instruction 13  |  instruction 12  |  instruction 11  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    27    |  instruction 14  |  instruction 13  |  instruction 12  |  -------------   |  instruction 11  |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    28    |  -------------   |  instruction 14  |  instruction 13  |  instruction 12  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    29    |  instruction 15  |  instruction 14  |  instruction 13  |  -------------   |  instruction 12  |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    30    |  -------------   |  instruction 15  |  instruction 14  |  instruction 13  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    31    |  instruction 16  |  instruction 15  |  instruction 14  |  -------------   |  instruction 13  |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    32    |  -------------   |  instruction 16  |  instruction 15  |  instruction 14  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    33    |  instruction 17  |  instruction 16  |  instruction 15  |  -------------   |  instruction 14  |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 8 set to -1



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    34    |  -------------   |  instruction 17  |  instruction 16  |  instruction 15  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    35    |  instruction 18  |  instruction 17  |  instruction 16  |  -------------   |  instruction 15  |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 9 set to 131068



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    36    |  -------------   |  instruction 18  |  instruction 17  |  instruction 16  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    37    |  instruction 19  |  instruction 18  |  instruction 17  |  -------------   |  instruction 16  |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 10 set to 12



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    38    |  -------------   |  instruction 19  |  instruction 18  |  instruction 17  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    39    |  instruction 20  |  instruction 19  |  instruction 18  |  -------------   |  instruction 17  |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 11 set to 4



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    40    |  -------------   |  instruction 20  |  instruction 19  |  instruction 18  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    41    |  instruction 21  |  instruction 20  |  instruction 19  |  -------------   |  instruction 18  |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 12 set to 1



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    42    |  -------------   |  instruction 21  |  instruction 20  |  instruction 19  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    43    |  instruction 22  |  instruction 21  |  instruction 20  |  -------------   |  instruction 19  |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 13 set to -24



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    44    |  -------------   |  instruction 22  |  instruction 21  |  instruction 20  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    45    |  instruction 23  |  instruction 22  |  instruction 21  |  -------------   |  instruction 20  |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 14 set to 536870911



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    46    |  -------------   |  instruction 23  |  instruction 22  |  instruction 21  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+

Data stored at address 1024 updated to 31



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    47    |  instruction 24  |  instruction 23  |  instruction 22  |  -------------   |  instruction 21  |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    48    |  -------------   |  instruction 24  |  instruction 23  |  instruction 22  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+

Data stored at address 1025 updated to 3



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    49    |  instruction 25  |  instruction 24  |  instruction 23  |  -------------   |  instruction 22  |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    50    |  -------------   |  instruction 25  |  instruction 24  |  instruction 23  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+

Data stored at address 1026 updated to 4



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    51    |  instruction 26  |  instruction 25  |  instruction 24  |  -------------   |  instruction 23  |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    52    |  -------------   |  instruction 26  |  instruction 25  |  instruction 24  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+

Data stored at address 1027 updated to 5



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    53    |  instruction 27  |  instruction 26  |  instruction 25  |  -------------   |  instruction 24  |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    54    |  -------------   |  instruction 27  |  instruction 26  |  instruction 25  |  -------------   |
+----------+------------------+------------------+------------------+------------------+------------------+



+----------+------------------+------------------+------------------+------------------+------------------+
|  Cycle   |      Fetch       |      Decode      |     Execute      |      Memory      |    WriteBack     |
+----------+------------------+------------------+------------------+------------------+------------------+
|    55    |  instruction 28  |  instruction 27  |  instruction 26  |  -------------   |  instruction 25  |
+----------+------------------+------------------+------------------+------------------+------------------+

Register 15 set to 31



+------------+----------------+------------------------------------+
|  Address   |   ValueAsInt   |           ValueAsBinary            |
+------------+----------------+------------------------------------+
|     0      |   805306373    |  00110000000000000000000000000101  |
|     1      |   813826048    |  00110000100000100000000000000000  |
|     2      |   822214655    |  00110001000000011111111111111111  |
|     3      |   830472195    |  00110001100000000000000000000011  |
|     4      |   838860804    |  00110010000000000000000000000100  |
|     5      |   847249413    |  00110010100000000000000000000101  |
|     6      |   855900154    |  00110011000000111111111111111010  |
|     7      |   864288761    |  00110011100000111111111111111001  |
|     8      |   1065353247   |  00111111100000000000000000011111  |
|     9      |   805306373    |  00110000000000000000000000000101  |
|     10     |   805306373    |  00110000000000000000000000000101  |
|     11     |   805306373    |  00110000000000000000000000000101  |
|     12     |   805306373    |  00110000000000000000000000000101  |
|     13     |    67387392    |  00000100000001000100000000000000  |
|     14     |   344481792    |  00010100100010000110000000000000  |
|     15     |   621576192    |  00100101000011001000000000000000  |
|     16     |   1435533312   |  01010101100100001000000000000000  |
|     17     |   1712586756   |  01100110000101000000000000000100  |
|     18     |  -2036858878   |  10000110100110000000000000000010  |
|     19     |  -1759772669   |  10010111000111000000000000000011  |
|     20     |  -1082129408   |  10111111100000000000010000000000  |
|     21     |  -1317010431   |  10110001100000000000010000000001  |
|     22     |  -1308621822   |  10110010000000000000010000000010  |
|     23     |  -1300233213   |  10110010100000000000010000000011  |
|     24     |  -1484782592   |  10100111100000000000010000000000  |
|     25     |       -1       |  11111111111111111111111111111111  |
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+------------+----------------+------------------------------------+
	
+------------+--------------+
|  Register  |    Value     |
+------------+--------------+
|     0      |      0       |
|     1      |   -131072    |
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|     3      |      3       |
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|     9      |    131068    |
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|     31     |      31      |
+------------+--------------+

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A simulation for a Von Nuemann based Computer Architecture using Java

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