I am working on porting a TI-85 Basic game to Asm-85 (Usgard) , and was wondering about a few things... 1. How do you do a square root? 2. How do you perform multiplications..is there an easier way to multiply mubers than multiple "add" commands? 3. In the "cosintan" routine, what is the multiplier, is it just "x" if the equation you want is "x sin @"? Thanxx for the help..............