        GRID SCROLL TEST

A grid is scrolled vertically,
horizontally and diagonally which
can be used to test linearity of
the displayor video processor;
and how it copes with scrolling
and framerate.

Button #GCR#G can be used to switch
between horizontal and vertical,
while the d-pad regulates speed. 

Diagonal scroll can be enabled
with the #Gtriggers#G.

Button #GA#G stops the scroll and
button #GCL#G changes direction. 
