Int 14 Fn 08  - Multidos Plus 4.0 Iodrv - Get And Reset Port Line Status   [S]

   AH = 08h

Return: AL = line status (see AH=03h)
   AH destroyed

Notes: the port number is stored at offset BEh in the Task Control Block
   on every line status change, the line status is ORed with the line
     status accumulator; this function returns the accumulator and clears
     it

See Also: AH=03h,AH=04h"MultiDOS",AH=07h"MultiDOS",INT 15/AH=13h"MultiDOS"