Int 2F Fn 1A01  U - DOS 4+ Ansi.sys Internal - Get/set Display Informatio  [V]

   AX = 1A01h
   CL = function
       7Fh for GET
       5Fh for SET
   DS:DX -> parm block as for INT 21,AX=440Ch,CX=037Fh/035Fh respectively

Return: CF set on error
       AX = error code (many non-standard)
   CF clear if successful
       AX destroyed

Note:  presumably this is the DOS IOCTL interface to ANSI.SYS

See Also: AX=1A02h,INT 21/AX=440Ch