Welcome, Code Archaeologist! (A Simple Guide to Disassembly)

In the pioneering days of MS-DOS, before massive operating systems and multi-gigabyte applications, programs were often elegantly simple. The purest example of this was the **`.COM` file**. Unlike a modern `.EXE` with its complex structure, a `.COM` file is a direct, raw image of machine code. When you ran one, the operating system did something remarkably simple: it loaded the entire file into memory at a specific address (`0x100`) and told the computer's processor to start executing the very first byte. This raw simplicity makes them fascinating artifacts to explore, like digital fossils from the dawn of personal computing.

But how do you read a file that's just a stream of numbers? That's where **disassembly** comes in. It's the process of translating that raw machine code back into a human-readable format called **assembly language**. Assembly is the most fundamental programming language, where each instruction corresponds directly to an operation performed by the CPU. This tool is your personal digital magnifying glass, allowing you to safely peek inside these classic programs. It reads the file, translates the machine code into assembly on the fly, and displays it for you—all instantly, right here in your browser. It's the perfect way to learn about the foundations of computing or to satisfy your curiosity about how those old-school programs really worked.

How to Use The Disassembler

Analyzing a piece of computing history is simple:

1. Select Your .COM File: Drag and drop your `.COM` file onto the upload area, or click the link to browse for it on your computer.
2. See the Assembly Code Instantly: The moment you select a file, the tool will read it and perform a basic disassembly. The results will appear, showing the memory address, the raw hexadecimal bytes (opcodes), and the translated assembly instruction for each line.
3. Save, Share, and Reset: Your disassembly is automatically saved in your browser. Use the "Copy Share Link" to get a unique URL to save or share your findings, or click "Analyze Another File" to start fresh.