Int 14 Fn FFFC  - Comm-drv V14.0 - Get Int 14 Flags                        [S]

   AX = FFFCh
   DX = port number

Return: AH bit 7 set on error
   AH bit 7 clear if successful
       BX = flags (see #0329)

See Also: AX=FFFDh

Bitfields for INT 14h flags:
Bit(s) Description (Table 0329)
 0 port active for INT 14h
 1 interface behaving like a FOSSIL driver