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Assembly Lab 1.7

AssemblyLab is a powerful x86 16-bit real mode assembly language simulator designed for iPhone, iPad, and Mac.

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Assembly Lab 1.7 screenshot
Assembly Lab 1.7 screenshot
Assembly Lab 1.7 screenshot
Assembly Lab 1.7 screenshot
Assembly Lab 1.7 screenshot

About Assembly Lab

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

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

?BIOS/DOS INTERRUPT SUPPORT?
o INT 10h Video Services: cursor control, character output, screen scrolling
o INT 21h DOS Services: keyboard input, string output, program termination

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

?CROSS-PLATFORM EXPERIENCE?
o iPhone: optimized portrait layout
o iPad: split-view interface for the big screen
o 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!

License: Commercial
Release info New Release on Sep 16, 2026
Release notes - 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.
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