Int 62 Fn 00CD  u - Fgdriver V4.02 - "fg_vballoc" - Create Virtual Buffer  [V]

   AX = 00CDh
   BX = width of virtual buffer in pixels
   CX = height in pixels

Return: AX = handle for virtual buffer, or
       FFFEh out of memory
       FFFFh virtual buffer table full

Note:  the FGDRIVER functions are rearranged with each major release, but
     their parameters do not change (see #3145)

See Also: AX=00CCh,AX=00CEh,AX=00D0h,AX=00D1h,AX=00D2h,AX=00D4h