qb45advr.hlp (Topic list)
SCREEN Modes 1 and 2
                CGA, EGA, VGA, or MCGA Adapter Boards
SCREEN 1: 320 x 200 graphics
  ■ 40 x 25 text format, 8 x 8 character box
  ■ 16 background colors and one of two sets of 3 foreground colors assigned
    using COLOR statement with CGA
  ■ 16 colors assigned to 4 attributes with EGA or VGA
SCREEN 2: 640 x 200 graphics
  ■ 80 x 25 text format with character box size of 8 x 8
  ■ 16 colors assigned to 2 attributes with EGA or VGA