TSE is a multitasking shell for the TI-83 Plus. It has the ability, similar to Microsoft Windows, to run several programs simultaneously, and switch between them. The latest version of TSE is TSE II v1.0. Download TSE II here. For TSE programs, visit the Archives portion of our site.
TSE has never become very popular, mainly because Ion was already established and had a large number of programs before TSE came along. TSE is very easy to program for, not only normal programs, but shells, too. A programmer can easily write an alternative interface to TSE using the functions provided. TI-Linux is an excellent example of this, as it provides the user with a complete GUI, including a arrow-key driven "mouse" cursor.
Robin Kay and I have released the complete source code for TSE v1.6. You can download it here. Please do not release a modified version of the source, or steal sizeable portions of code. You may use the source to learn how TSE operates, or if you need to know really intricate details for a program you are writing. This version of the TSE source code is not the latest, but the basic functionality is the same for the kernel.
-- Michael Vincent