Int 62 Fn 00C5  u - Fgdriver V4.02 - "fg_tcmask" - Set Transparent Colors  [V]

   AX = 00C5h
   BX = colors to consider transparent (bit 0 = color 0, etc)

Notes: the FGDRIVER functions are rearranged with each major release, but
     their parameters do not change (see #3145 at AX=0000h)
   This call is ignored in text modes
   The specified colors are considered transparent by "FG_TCXFER"

See Also: AX=00C4h,AX=00C6h