Emulator for TI-59 Calculator

Pascal Obry

About this app

Emulate a 1977 vintage Texas Instruments TI-58/58C/59 calculator. This programmable emulator lets you load/save programs, it includes an implementation of the original Master Library module and many other modules (Leisure, Math, Surveying, Electrical, Aviation, Marine). Sources on GitHub at https://github.com/TurboGit/ti5x_android include a tools for building your own program/module files.

The ti5x application does aim for 100% authenticity even if not possible in all cases. Yet, it supports many undocumented features from the original calculator like the HIR registers and the /DSZ nn 51/ (decrement no-jump) instructions.

With the current version it is possible to play some famous games. And many original programs are running without modification.

Ratings and reviews

This is an excellent TI/AOS calculator with the EE & ENG, and 1/x keys that I am so used to. My 3/5 stars have to do with usability. There is a loud and annoying keypress sound that I can't find a way to disable. The double line font is hard to read - solid would be better. And for those of us with low color vision, changing the red-on-black numeric display to a higher contrast combo would be helpful (although this is true to product). Love it but hard for an old geezer to use.

I love this app. I owned a real TI-59 when I was in college (and still do). I appreciate that this emulator also implements undocumented features of the original TI-59 such as the HIR function. One particular program I ordered from the old PPX-59 group used this HIR function and other TI-59 emulators (e.g., for Windows) fail to support these features. This emulator also includes several of the Solid State Software Modules available for the original TI-59. So, five stars for this app.

I have installed this for about two weeks and it is great in every way. Only the design of the logo or logo on the app itself is very ugly and there is no specific time for this, and the easiest thing is to do it yourself.

What's new

v9.3, 2024 May 5rd:
Fix decimal display precision.

v9.2, 2024 May 3rd:
Fix display in Fix mode

v9.1, 2024 April 27th:
Fix calc save/restore state
Fix display in Fix + Eng mode

v9.0, 2024 April 20th:
Replace all modules by dump of ROM.
Many new modules have been added:
- Applied Statistics
- Real Estate / Investment
- Securites Analysis
- Business Decision
- RPN Simulator
- Structural Engineering
- Agriculture