RetroAsm6502

[ 100% Free / Completely Free ] No Ads / No In-App Purchases / Works 100% Offline 

Overview  RetroAsm6502 is a high-precision 6502 assembler and real-time emulator/debugger environment for Android devices, designed for retro computing enthusiasts, homebrew developers, and low-level programming learners. 

Key Features 

1. High-Precision 6502 Emulation 

• Full support for standard 6502 instructions and all addressing modes.
• Illegal Opcodes (Unofficial Instructions): Accurately simulates unofficial instructions such as LAX, SAX, DCP, ISC, SLO, RLA, SRE, RRA, and more.
• Internal Bus Interference: Reproduces subtle hardware-level edge cases and page-cross behavior (e.g., SHX, SHY, TAS).

2. Assembler & Integrated Debugger 

• Fast and lightweight assembling directly inside the application.
• Real-time visual monitoring of CPU registers (A, X, Y, PC, S, P flags).
• Interactive memory viewer and execution inspection to make debugging intuitive on Android.

Privacy & Security 

・100% Offline & Local: Runs entirely on your device with no internet connection required.

・Zero Data Collection: No ads, no analytics, and zero personal data tracked, stored, or sent.

System Requirements 

• Platform: Android
• OS Version: Android 8.0 (Oreo / API level 26) or higher
• File Format: APK

Feedback & Support  If you find any bugs or have suggestions for new features, please leave a comment in the community section below!