Int 7F Fn 04  - G8bpq V4.00+ - Host Mode - Get Stream Status               [N]

   AH = 04h
   AL = stream number (01h-40h)

Return: CX = state (0000h disconnected, 0001h connected)
   DX = delta state (0000h no change, 0001h changed since last check)

See Also: AH=00h"G8BPQ",AH=02h"G8BPQ",AH=05h"G8BPQ"