X value for Colum  Calculation From the   Horizontal Counter

Now all the on thr right of  Bit 3 including bit 3 make up the  Colum  postion  with a maximum on 79  over that the count is not valid.
from    0 to 79   is 80 positions    80*8 = 640   the max.

  Y value for  Row  Calculation From the  Vertical  Counter

Now all the on the right of  Bit 3 including bit 3 make up the  Row   postion  with a maximum on 24  over that the count is not valid.
0 to 24 is 25   

  I wanted to have  a display of    25 lines * 80 Colums