⇧ Upload Programs/Files to Calculator

Select a file (.8x* or .83*) to upload to your jsTIfied virtual calculator. If the calculator is not at the homescreen and turned on, this is likely to fail.

⇩ Download Programs/Files from Calculator

Please register and log in to Cemetech to export files. We require registration to moderate excessive use of this tool.

Capture Screenshot

Please register and log in to Cemetech to take screenshots. Because screenshot data must be bounced through the Cemetech server due to Javascript limitations, we require registration to mitigate abuse.

⇧ Import Calculator ROM Image

jsTIfied needs a ROM image to function. Please note that this is only stored in your local browser and is never sent out over the internet in any form, especially not to any Cemetech servers or storage. This must be a TI-73, TI-76.fr, TI-81, TI-82, TI-82 Stats.fr, TI-83, TI-83 Plus, TI-83 Plus Silver Edition, TI-84 Plus, TI-84 Plus Silver Edition, or TI-84 Plus C Silver Edition ROM image. Note: in most countries, it is illegal to share or download ROM images for devices you do not own.

From most devices, you should upload a *.rom file. If you are on an iOS6+ device like an iPad, iPhone, or iPod Touch, you must use the Export Calculator ROM Image tool below from a computer to export your ROM encoded in a JPEG image. You can then upload that image as a ROM from your iOS device.

⸙ Export Calculator ROM Image

Limitations of Apple iPad, iPhone, and iPod Touch devices mean you cannot load *.rom files to jsTIfied from those devices. To use this graphing calculator emulator on your Apple device, follow these steps:

1. From a computer, upload your *.rom image to jsTIfied
2. From the same computer, click this: Create JPEG-encoded ROM image. Right-click the black-and-white square image that appears, choose "Save As...", and save it to your computer as *.jpg.
3. Use iTunes or iCloud to get the .jpg image onto your iOS 6+ device. Alternatively, email yourself this image, then download it directly from your Apple device, or use the Dropbox App. Caution: Some very large images sent via iTunes or iCloud will result in the image being resized and corrupted! If jsTIfied seems unable to load your JPEG-formatted ROM, try emailing it to yourself instead of using iTunes/iCloud.
4. Open jsTIfied on your Apple device and upload the JPEG in the "Import Calculator ROM Image" section above. Voila!

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 JPEG ROM ( data bytes)

Right-click on this image and save it as anything.jpg. You can then load it onto your iPad, iPhone, or iPod Touch to use it as a jsTIfied ROM image.

Frequently-Asked Questions

I'm curious how this works. Can you explain?

Happily! Read how jsTIfied works: learn the nitty-gritty of how jsTIfied was designed and constructed.

This emulator won't work! jsTIfied complains about Javascript being disabled, or displays error messages about missing Javascript features. How do I fix it?

Make sure Javascript is enabled. If that's not the issue. some browsers don't offer all of the Javascript features jsTIfied needs in order to work. Most versions of Firefox, Chrome, Opera will work. Internet Explorer versions IE10 and higher, and Safari 6 and higher also work. Many mobile browsers will not run jsTIfied properly.

Why do I need a ROM image to use this?

A ROM image is the software (operating system) that is on your calculator, the way Windows or Mac OS X is the operating system on your computer. jsTIfied just emulates the calculator's hardware, so you need to load the ROM image from your real calculator to make jsTIfied work.

Where can I download a ROM image?

Your calculator's software has a unique area called the certificate; it is illegal to share ROMs (otherwise jsTIfied would come with the ROM already installed and save you work!). You must use something like Rom8x to dump the ROM image off of your calculator. Cemetech does not recommend downloading ROM images from the internet, because as previously stated, it is illegal for sites to be distributing ROMs. Although Cemetech does not provide support, members have reported that the WabbitEmu emulator can generate .ROM images from .8xu OSes provided by Texas Instruments. The legality of this approach is contested; please contact the WabbitEmu developers for support and details.

What calculators does jsTIfied support?

jsTIfied emulates the TI-83 Plus, TI-83 Plus Silver Edition, TI-84 Plus, and TI-84 Plus Silver Edition. It also supports the TI-82, TI-83 (non-Plus), TI-73, TI-81, TI-76.fr, and TI-82 Stats.fr; future support for the TI-84 Plus C Silver Edition is planned. It will never support the TI-89, TI-92, Voyage 200, or TI-Nspire calculators, which run on completely different hardware.

Why is jsTIfied running so slowly on my computer?

jsTIfied is operating at the very edge of current computing technology's capabilities, both hardware and software wise. It uses plenty of tricks to run as fast as possible, and a great deal of effort and testing time was spent making it perform optimally in popular browsers. However, emulation carries a significant performance penalty even in compiled languages like C++, and Javascript brings the extra slowdown of an interpreted language plus the rendering overhead of a complex modern browser. Once more optimized Javascript engines and faster hardware are available, jsTIfied will be automatically faster. Unfortunately, by that time we'll have faster calculators that it will need to emulate.

I still need help.

That's not really a question, is it? Post a topic on the Cemetech forum and our helpful members will try to assist you.

Key Mappings

jsTIfied follows the PindurTI key mapping convention.

Terms of Service

By using this emulator, you agree to the following terms of service. You agree to use this emulator for good, for the development of positive and constructive software. You acknowledge that this emulator stores all calculator information client-side, in your browser, and never transfers the ROM image of the calculator in whole or in part to or from Cemetech's servers and hardware. Cemetech does not host any ROM images; you must dump a legitimate ROM from your calculator to use this tool. SourceCoder integration allows you to choose to transfer files you have written on it to Cemetech for sharing and editing, but only user-written programs and files will be transferrable. Due to technical limitations of Javascript, data in screenshots and exported programs only must be bounced through the Cemetech web server. The data is not cached or stored in any way, but if you wish to keep your calculator's data entirely in your browser, do not use those features.

You acknowledge that this tool is provided for free personal, educational, and non-commercial use. No fitness or stability guarantees are provided, and data may be lost without warning. Cemetech reserves the right to suspend access to this tool at any time. Abuse of this tool may cause individuals or organizations to be blocked from access. The code and images used to create the jsTIfied tool are either the sole intellectual property of Cemetech / Christopher Mitchell or by other authors/artists and used with permission. You may not reproduce the jsTIfied tool in whole or in part, reverse engineer it, or attempt to host it on your own website, especially (but not exclusively) for profit, without express written consent from Cemetech / Christopher Mitchell.

Transfer files from SourceCoder

Please register and log in to Cemetech to link jsTIfied with SourceCoder. SourceCoder projects are associated with individual user accounts, so you must be logged in to access SourceCoder projects.