Int 14 Fn 07  - Multidos Plus Iodrv - Get Port Status                      [S]

   AH = 07h

Return: CL = modem status (see #0231)
   CH = character at head of input queue (if any)
   DX = number of characters in input queue

Note:  the port number is stored at offset BEh in the Task Control Block

See Also: AH=03h,AH=05h"MultiDOS",AH=08h"MultiDOS",AH=09h"MultiDOS"

See Also: AH=23h"MultiDOS",INT 15/AH=13h"MultiDOS"