INT 14 - MultiDOS Plus IODRV - RESET PORT STATUS
AH = 09h
Return: modem status byte cleared
Note:   the port number is stored at offset BEh in the Task Control Block
SeeAlso: AH=07h"MultiDOS",INT 15/AH=13h"MultiDOS"

See also: 1404

1409 - MultiDOS Plus IODRV - RESET PORT STATUS