MIPS CPU Simulator

A simple MIPS CPU simulator written in C++. It implements instruction fetch, decode, and execute for a subset of the MIPS instruction set.

Features

• Supports R-type, I-type, and J-type instructions
• 32-bit register file (32 general-purpose registers)
• ALU for arithmetic and logic operations
• Load/store and branching instructions
• Takes instructions in either hexadecimal (0x...) or binary (0b...) formats
• Manual instruction loading to memory by address

Components

• CPU — Main processor logic
• MainMemory — Simulated byte-addressable memory
• RegisterFile — 32 general-purpose registers
• ALU — Arithmetic and logic unit
• ControlUnit — Generates control signals for each instruction

Sample Program

Task: Add 5 and 7, store result in $3

Hex format

0x20010005
0x20020007
0x00221820

Binary format

0b00100000000000010000000000000101
0b00100000000000100000000000000111
0b00000000001000100001100000100000