x86-64 Playground is a web app for experimenting and learning x86-64 assembly.
The Playground web app provides an online code editor where you can write, compile, and share assembly code for a wide range of popular assemblers such as GNU As, Fasm and Nasm.
Unlike traditional onlide editors, this playground allows you to follow the execution of your program step by step, inspecting memory and registers of the running process from a GDB-like interface.
You can bring your own programs! Drag and drop into the app any x86-64-Linux static executable to run and debug it in the same sandboxed environment, without having to install anything.
The forum told stories: prototypes that stabilized unstable clocks, a satellite transmitter that regained sync mid-orbit, a musician who used the chip's analog front end to create new synth textures. The datasheet's diagrams had become pilgrimage scrolls, and the link in the footer was now a legend. Maya decided to build a simple board. She wired the A68064 per the datasheet's recommendations: decoupling capacitors placed with reverence, the crystal oscillator tied with the subtlety of a ritual, the PLL power sequence followed to the letter — or to the annotations in the margins that warned of an alternate sequence when operating near 1.8V.
She wasn't sure whether she'd unlocked some hidden feature or simply triggered a calibration tone. But the tone harmonized with the lab's fluorescent hum and made her think of telephone wires and distant, patient machines. News of the A68064 board spread quietly. Artists used the chip to craft drones that sang in harmonic overtones; a med-tech startup used its timing stability to synchronize sensors in a wearable for sleep research. An open-source community documented layout tricks copied from the annotated datasheet. The original forum grew into a small, focused archive of practical wisdom, where people left tips in the margins of PDFs the way previous engineers had left ink on paper. a68064 datasheet link
Maya modified the board to present the serial over a debug header and fed a checksum into the chip as described in a marginal note. The LED blinked twice, paused, then began a slow pulse, as if breathing. On the oscilloscope, a subtle waveform emerged from the analog front end: a low-frequency carrier layered with a jitter pattern that, when filtered, produced a tone — a single, clear musical note that seemed impossibly pure. The forum told stories: prototypes that stabilized unstable
Every so often she would pull it out, trace a finger along the timing diagram, and listen as the chip on her bench sang that single, impossible note — a reminder that sometimes a simple link on the corner of a page could open a path to collaboration, creativity, and a little bit of wonder. She wired the A68064 per the datasheet's recommendations:
Have you ever seen a responsive debugger? The app places the mobile experience at the center of its design, and can be embedded in any web page to add interactivity to technical tutorials or documentations.
Follow the guide to embed in your website both the asm editor and debugger.
The app is open-source, and available on Github. It's powered by the Blink Emulator, which emulates an x86-64-Linux environment entirely client side in your browser. This means that all the code you write, or the excutables you debug are never sent to the server.
everything runs in your browser, and once the Web App loads it will work without an internet connection.
