Color definitions :
Black = 0; Blue = 1; Green = 2; Cyan = 3; Red = 4; Magenta = 5; Brown = 6; LightGray = 7; DarkGray = 8; LightBlue = 9; LightGreen = 10; LightCyan = 11; LightRed = 12; LightMagenta = 13; Yellow = 14; White = 15; Blink = 128;Miscellaneous constants
TextAttr: Byte = $07; TextChar: Char = ' '; CheckBreak: Boolean = True; CheckEOF: Boolean = False; CheckSnow: Boolean = False; DirectVideo: Boolean = False; LastMode: Word = 3; WindMin: Word = $0; WindMax: Word = $184f; ScreenWidth = 80; ScreenHeight = 25;