Int 14 Fn 85  - Comm-drv V14.0 - Receive Packet                            [S]

   AH = 85h
   CX = length of packet in bytes
   DX = port number
   ES:DI -> buffer for packet

Return: AH = line status (see #0230)
       bit 7 set on error
   AL destroyed

Note:  this call requires that at least the requested number of bytes are
     already present in the input buffer, and will fail if there are
     fewer bytes available

See Also: AH=84h"COMM-DRV",AH=86h"COMM-DRV",AH=8Eh"COMM-DRV"