INT 62 u - FGDRIVER v3.03 - "FG_DRECT" - DRAW DITHERED RECTANGLE IN SCRN SPACE
        AX = 0021h
        BX = screen space column of left edge
        CX = screen space column of right edge
        DX = screen space row of top edge
        SI = screen space row of bottom edge
        ES:DI -> dithering matrix (video-mode dependent)
Notes:  For FGDRIVER v1.10, this function was "FG_GETXPOS" (see AX=0045h);
          "FG_DRECT" was AX=002Ch
        This call is ignored in text modes
SeeAlso: AX=0006h,AX=0008h,AX=0011h,AX=0031h,AX=0072h,AX=0080h

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