Jstified .rom file download

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. That's not really a question, is it?

Post a topic on the Cemetech forum and our helpful members will try to assist you. By using this emulator, you agree to the following terms of service. 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. SourceCoder projects are associated with individual user accounts, so you must be logged in to access SourceCoder projects.

Post in the Cemetech thread and discuss away! Drop file here to load into RAM. Drop file here to load into Archive. Error: Your browser does not support Javascript, or Javascript is disabled. Or jsTIfied is still loading; please be patient.

Error: Your browser does not support one of the Canvas features needed to draw the calculator screen fast. Error: Unable to load the specified file. Are you sure there's enough free memory to fit it? Is the calculator at the homescreen? The emulator's state will not be saved and reloaded the next time you visit this page. Capture Screenshot Please register and log in to Cemetech to take screenshots.

Error: Invalid ROM file; must end in. On iOS devices, may end in. Frequently-Asked Questions I'm curious how this works. Can someone please help? What do I need to do to get this emulator to work on my Mac?

A rom image is a file that contains all of the Read-only-memory on your calculator, including the operating system and other non-user-generated internal files. Note that a Mac is a Unix OS. Thank you! I'm not really looking to interact with MY calculator and it's broken anyway. I just want a generic computer-based TI or Why, for example, was it so important to keep the ROM images on the users' computers?

Critical Design Decisions jsTIfied's design was influenced by several key considerations. First and foremost, it had to be fast, whether one or users were using it simultaneously. Secondly, it had to be reasonably secure, preventing the possibility that users might lose proprietary state stored on their devices. Thirdly, it had to be legal: many emulators have been become unavailable over the years by including or releasing ROM images.

Fourthly, it had to be as compatible as possible and require minimal prerequisites. Finally, it had to offer most if not all or more! Among the decisions that each factor influenced: Fast: Although Javascript is not an inherently fast language, modern JIT Javascript engines help. To eke out every bit of speed possible, I use Google's Closure compiler, compress global names to reduce symbol table lookup times, and performed many rounds of profiling and optimization using Firebug and Chrome's JS profiler.

To make sure that users get a consistent experience, I made sure that almost none of jsTIfied's required computing power comes from Cemetech's own servers. The most server-intensive features are exporting screenshots and exporting files, and even those simply require the server to echo a data stream back to the client.

It would also be impossible to include the Cemetech server in the loop for any critical part of the emulation due to variations in latency. Screenshots and file exports are bounced through the Cemetech server due to Javascript limitations, but are not cached or stored server-side. Legal: According to most interpretations of the law, ROM images are specific to the device from which they're dumped, on the grounds that in buying the device ie, the calculator you purchased a license for its software ie, its operating system , and by duplicating or distributing a ROM you are illegally distributing software without authorization or a license.

Compatible: By requiring only a browser and Javascript, jsTIfied can run on any operating system with a decent browser, from Windows, Linux, and Mac OS to mobile devices.

Flash and Java would both be too cumbersome of requirements for the job, not to mention that I dislike Java and have little Flash experience. Features: By using a webapp approach, new features will be instantly pushed to every user.

Javascript is now powerful and expressive enough that all the essential emulation features, plus extras like a debugger and screenshots, are possible without sacrificing the real-time speed of the emulation. In z80 assembly, the djnz opcode is a "decrement and jump if not zero" instruction. It operates on the b register, one of the several 8-bit registers in the z80 CPU. It first decrements b , then checks if it is zero.

If so, it continues to next instruction past the djnz , but if b is not zero, it jumps to the label mentioned after the djnz. An example of some real code that uses djnz: ld a, randData ;save randomness of data ld b, ; bytes to clear ld hl,MainSafeRAM ;clear our saferam areas InitClearLoop: ld hl ,0 ;put zero in it inc hl ;go to next byte djnz InitClearLoop ;done yet? Every z80 instruction takes a certain number of clock cycles, and as on most processors, jump instructions take longer when the jump is taken.