INT 62 u - FGDRIVER v1.10 - "FG_PATTERN" - SPECIFY DISPLAY PATTERN FOR COLOR
        AX = 0050h
        BX = index of pattern to define
        CX = number of predefined display pattern
Notes:  when displaying a pixel run map, Fastgraph uses the pattern associated
          with each color index rather than displaying the actual color
        this call has no effect in text and 256-color graphics modes
SeeAlso: AX=004Eh,AX=004Fh