Introduction - If you have any usage issues, please Google them yourself
Square Root By Newton Raphson Method
This routine computes the square root of a 16 bit number(with
low byte in NumLo & high byte in NumHi ). After loading NumLo &
NumHi with the desired number whose square root is to be computed,
branch to location Sqrt ( by "GOTO Sqrt" ). " CALL Sqrt" cannot
be issued because the Sqrt function makes calls to Math routines
and the stack is completely used up.