Assembly Lab: 8086 NASM IDE

AssemblyLab is a powerful x86 16-bit real mode assembly language simulator designed for iPhone, iPad, and Mac. No complex setup required — learn and practice assembly programming anywhere, anytime.

【CORE FEATURES】

• Complete x86 16-bit CPU emulation with 60+ instructions
• NASM syntax assembler — write and run instantly
• Real-time disassembly view to understand machine code
• Full 1MB memory space, authentic real mode simulation

【POWERFUL DEBUGGING TOOLS】

• Set breakpoints and step through code
• Live register monitoring (AX/BX/CX/DX/SP/BP/SI/DI)
• Visual FLAGS indicator display
• Memory browser with hex view and editing
• Execution log to trace every instruction

【BIOS/DOS INTERRUPT SUPPORT】

• INT 10h Video Services: cursor control, character output, screen scrolling
• INT 21h DOS Services: keyboard input, string output, program termination

【LEARNING-FRIENDLY】

• Built-in example programs from Hello World to algorithms
• Syntax-highlighted code editor
• Console output for immediate feedback
• Load and run .COM files

【CROSS-PLATFORM EXPERIENCE】

• iPhone: optimized portrait layout
• iPad: split-view interface for the big screen
• Mac: native support with keyboard shortcuts

Perfect for:

• Computer Science students
• Operating Systems course learners
• Reverse engineering beginners
• Retro computing enthusiasts
• Developers curious about low-level programming

AssemblyLab is your ideal companion for exploring how computers really work at the lowest level.

Download now and start your assembly journey!

• Turbo mode executes a batch of instructions per frame, lifting the 1000 instructions per second ceiling so interactive programs stay responsive.
• New BIOS services: INT 16h keyboard reads with scan codes and INT 1Ah timer ticks, plus arrow keys and DOS extended keys in the console.
• Float the registers, memory, console or log panel in a movable, resizable window; maximize it, minimize it to a bubble, and the layout is remembered.
• The console is redrawn on a single canvas that fits the 80x25 grid to any screen, with pinch zoom and an on-screen D-pad in character mode.
• Assembler and runtime errors can now be copied. Fixes for memory displacement, label addresses and NASM-style res* labels.
• The 8086 model viewer now supports panning with two fingers, a right-drag, or an Option/Shift drag.