Several months ago TI released the descriptions of some of it's ROM calls for the 89. It also released a C header file that went along with them. Does anyone know it that are any plans at TI to release some or better yet all of the documentation for the of other ROM calls? Ed Behn 222 Nason behne@rpi.edu RPI Residence Hall (518)276-7446 110 8th Street Troy, NY 12180