INT 2fH b000H: Is GRAFTABL.COM Installed?

                                                         Compatibility: 5.0+ 
 Expects: AX    b000H
 Returns: AL    status: 00H = GRAFTABL.COM is not installed
                        ffH = GRAFTABL.COM is installed
    Info: Checks to see if the DOS 5.0+ GRAFTABL.COM program has been
          executed and its graphics-character definitions have been made

          GRAFTABL.COM installs data that defines how ASCII characters 80H-
          ffH are displayed while in graphics mode (see Video Modes).  It
          loads about 1K of data into memory and modifies the INT 1fH
          vector to point to that data.

          GRAFTABL.COM is used only by CGA owners, and even then, very

See Also: Font Definition Data
          INT 2fH: Multiplex Interrupt
          DOS Functions