INT 14 - MultiDOS Plus 4.0 IODRV - GET AND RESET PORT LINE STATUS
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
SeeAlso: AH=04h"MultiDOS",AH=07h"MultiDOS",INT 15/AH=13h"MultiDOS"

See also: 1403

1408 - MultiDOS Plus 4.0 IODRV - GET AND RESET PORT LINE STATUS