CPU EMULATOR

Processor Architecture Emulator (College project)

This project implements an emulator for a custom processor architecture. The processor's programming model includes the following features:

🔹 Four 64-bit general-purpose registers
🔹 A program counter
🔹 A 64-bit address space
🔹 1-byte length for the content of each memory address

Instruction Set

The instruction set of the emulator includes:

Basic Arithmetic Operations:
    🔹 ADD (Addition)
    🔹 SUB (Subtraction)
    🔹 MUL (Multiplication)
    🔹 DIV (Division)

Basic Bitwise Logical Operations:
    🔹 AND (Bitwise AND)
    🔹 OR (Bitwise OR)
    🔹 NOT (Bitwise NOT)
    🔹 XOR (Bitwise XOR)

Data Transfer Instructions:
    🔹 MOV (Move) with support for both direct and indirect addressing

Branching Instructions:
    🔹 JMP (Unconditional Jump)
    🔹 JE (Jump if Equal)
    🔹 JNE (Jump if Not Equal)
    🔹 JGE (Jump if Greater or Equal)
    🔹 JL (Jump if Less)
    🔹 CMP (Compare) with support for both direct and indirect branching

I/O Routines:
    🔹 Read a character from the keyboard into a register
    🔹 Output a character from a register to the screen

Processor Control:
    🔹 HALT (Stop Processor)
    🔹 RESUME (Resume Processor)

Example of usage

You can write text file that utilizes commands described above and save it to src/java/main/input directory. There are 2 example files already. You can than load them in application using file load command:

fl file_name.txt

Now you can step through each line of code using step(s) command, or just run entire program using run command.

Using help command, you can see other useful commands.