Actually the ADM-3A automatically wraps overflowing text similar to what you would expect from a terminal unless you disable the "Auto NL" switch and it is 80x2

Actually the ADM-3A automatically wraps overflowing text similar to what you would expect from a terminal unless you disable the "Auto NL" switch and it is 80x24 characters unless you got the basic 80x12 variant without the "24 lines" option.