Open Source

8086 Processor Web Emulator

Open-source Intel 8086 emulator and assembler for the browser (Vanilla JS), built as a university final project in a team of 6, featuring instruction set simulation and interactive debugging.

Role Frontend developer

Stack

JavaScriptHTMLCSS

8086 Online IDE promotional thumbnail

01

Write and debug assembly

CodeMirror editor with 8086 assembly syntax highlighting.
Gutter breakpoints let users pause execution on specific instructions.
Live line highlighting keeps the current execution point visible.

Write and debug assembly

02

Step through execution

Step forward one instruction at a time while watching CPU state change.
Step backward support makes execution easier to inspect and reason about.
Run controls can continue until a breakpoint or program end.

Step through execution

03

Register inspector

Shows all 14 core 8086 registers plus status flags.
Changed register values are visually highlighted after each step.
Expandable panel gives a focused view for CPU-state debugging.

Register inspector

04

Full 1MB memory browser

Virtualized RAM browser covers the full 20-bit 1MB address space.
Jump-to-address search makes inspection fast.
Auto-follow mode keeps the memory view near the instruction pointer.

Full 1MB memory browser

05

Memory write history

Chronological log records every byte written during execution.
Old and new values are shown side by side for debugging.
Stack viewer marks the SP pointer so memory effects are easier to trace.

Memory write history

06

DOS-style text I/O

Canvas-rendered console supports DOS-style text interaction.
INT 21h and INT 10h flows can pause execution for keyboard input.
Programs can demonstrate real interactive assembly I/O in the browser.

DOS-style text I/O

07

Built-in example programs

Includes 48 example programs across 9 categories.
Covers simple instruction demos through algorithms like Bubble Sort and Fibonacci.
Source preview helps users inspect examples before loading them.

Built-in example programs