Constant Adapter Color or B&W Screen Size -------- ------- ------------ ----------- BW40 = 0; Color Black/White 40 X 25 C40 = 1; Color Color 40 X 25 BW80 = 2; Color Black/White 80 X 25 C80 = 3; Color Color 80 X 25 MONO = 7; Monochrome Black/White 80 X 25 Last = -1; Last active text mode