Graph Unit 
                            Graphic Mode Constants 

      PURPOSE:  Constant declarations used for Graphic modes

      REMARKS:  Use these constants with InitGraph, DetectGraph and
                GetModeRange.

                 Const
                    CGA0       = 0;      HercMonoHi = 0;
                    CGA1       = 1;      ATT400C0   = 0;
                    CGA2       = 2;      ATT400C1   = 1;
                    CGA3       = 3;      ATT400C2   = 2;
                    CGAHi      = 4;      ATT400C3   = 3;
                    MCGAC0     = 0;      ATT400Med  = 4;
                    MCGAC1     = 1;      ATT400Hi   = 5;
                    MCGAC2     = 2;      VGALo      = 0;
                    MCGAC3     = 3;      VGAMed     = 1;
                    MCGAMed    = 4;      VGAHi      = 2;
                    MCGAHi     = 5;      PC3270Hi   = 0;
                    EGALo      = 0;      IBM8514Lo  = 0;
                    EGAHi      = 1;      IBM8514Hi  = 0;
                    EGA64Lo    = 0;
                    EGA64Hi    = 1;