Vertigo is an entirely new programming language for the TI-85. It is written entirely on the calculator and the programs are converted on the calculator to assembly programs. This isn't some barely functional BASIC to ASM convertor. Its a full functional language that creates powerful programs that run at amazing speeds. Includes support for external routines/add-on commands, two program editors, an encoder, compiler, decompiler, samples and full documentation. It is entirely calculator based.