Graph 89

Emulate any of the following calculators: * TI89, TI89T * TI92, TI92+ * V200 * TI84+, TI84+SE * TI83, TI83+, TI83+SE No ROM images are included. You can extract one from your own calculator or if you have a physical device, download an OS upgrade image from TI. This is a fork of Graph 89 to support 64-bit OS architectures and the modern Android Storage Access Framework