yeah, I still got my 'D'.
I had written an 80 column mode drawing program that used assembly routines to draw the graphics.
I had a series of pokes that turned it into 80x50 but sharp, not fuzzy. Settings were specific to what monitor you use. I have (still do) a Magnavox that was 128 compatible, it has a composite cable and the RGB TTL cable.
Ah the memories...