8086 ASM Visualizer — VS Code Extension

Debug 8086 assembly without leaving VS Code.

This extension brings the ASM Visualizer debugger directly into a VS Code panel. Write your .asm file in the editor, open the panel, and step through your code — registers, flags, memory, and stack updating live right next to your code.

⚠️ Requires the ASM Visualizer desktop app to be installed and running. Download it free from the Microsoft Store.

What the Extension Does

🐛 Step-Through Debugger — inside VS Code

Open the ASM Visualizer debugger in a VS Code panel alongside your code:

• Step instruction by instruction (F10)
• Set breakpoints
• Inspect registers, flags, memory, and the stack at every step
• Current instruction stays in sync with your editor

⚙️ Live CPU State

Every register updates in real time as you step:

• General-purpose: AX, BX, CX, DX, SI, DI, BP, SP
• Segment: CS, DS, ES, SS
• Instruction pointer (IP) and all CPU flags (ZF, CF, OF, SF, PF, AF, DF, IF)
• Values flash on change

Want the Full Experience?

The VS Code extension focuses on debugging. For flowcharts, animated execution, memory visualization, program output, and more — use the full ASM Visualizer desktop app.

Get ASM Visualizer on the Microsoft Store →

How to Use

1. Install and launch ASM Visualizer from the Microsoft Store
2. Open any .asm file in VS Code
3. Right-click in the editor → ASM Visualizer: Visualize — or Ctrl+Shift+P → ASM Visualizer: Visualize
4. The debugger opens in a VS Code panel, pre-loaded with your file

The extension automatically:

• Sends your current file's code to the app
• Detects NASM, MASM, or TASM syntax
• Stays in sync as you edit

Requirements

Settings

Change via File → Preferences → Settings → search asmvisualizer.

Supported Dialects

Works with any .asm file. Dialect auto-detected:

• NASM — default
• MASM — detected from directives like .MODEL, PROC, ENDP
• TASM — Turbo Assembler syntax supported

Feedback & Issues

Found a bug or have a feature request? Open an issue on GitHub or use the Contact / Bug Report button inside the app.