Fast, efficient JIT JS interpreters: Perhaps the most important on this list, modern Javascript interpreters coupled with modern consumer hardware are actually fast enough to emulate a 15MHz processor in Javascript.

Browsers like Firefox even let users right-click on the canvas and save it as an image. The Canvas API: Instead of doing something kludgy like manipulating thousands of tiny divs, programmers can create images from Javascript with Canvases, vital for a Javascript graphing calculator emulator to have a fast, realistic LCD screen.The most obvious piece of data is the ROM image, which can be up to 2MB for a TI graphing calculator, but there's also the calculator's RAM, current flash, ASIC, keypad, and LCD state, preferences, debugger settings, and more. DOM Storage: Just as Flash applications are allowed to store a small amount of data in clients' browsers for the next time they launch, a reasonable graphing calculator emulator would need to store data in the user's browser.This API was important because for legal reasons, I did not want users' ROM images to be stored on or even pass through the Cemetech web server. The Javascript File API: This API provides a means for Javascript to directly load files, rather than simply sending them off to a remote server as a form attachment.A variety of factors came together to finally make jsTIfied feasible, namely: It was long a dream of mine to be able to create such an online emulator, but until recently, this was impossible. The jsTIfied emulator is written entirely in Javascript and HTML5. Built-in debugger and CPU/memory view for assembly programmersĬlick here to launch the jsTIfied online graphing calculator emulator, check out the video below for an overview of the major highlights, or read on for more details about how jsTIfied works.Integrated with the SourceCoder TI-BASIC IDE/editor, so that you can write programs in SourceCoder and immediately test them on a calculator.Can export all files from the emulated calculator.Drag calculator files onto the jsTIfied LCD to import them.Can take animated and still screenshots.Runs on all major browsers and operating systems.Full TI-83+/TI-84+ emulation including accurate LCD physics for good-looking grayscale.As a full calculator emulator, it offers lots of features: For legal reasons, you must load your own ROM image, which is stored in your browser and never sent to the Cemetech server.

It runs entirely in your browser using HTML5 and Javascript, so it requires neither Java nor Flash. JsTIfied is an online graphing calculator emulator, emulating the TI-83 Plus, TI-83 Plus Silver Edition, TI-84 Plus, and TI-84 Plus Silver Edition.

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