Int 61 Fn 1D  - PC/tcp Kernel V2.05+ - "net_readfrom" - Read A Datagram    [N]

   AH = 1Dh
   BX = network descriptor
   CX = maximum number of bytes to read
   DX = receive options (see AH=1Bh)
   DS:SI -> buffer for received data
   ES:DI -> 9-byte buffer containing "addr" structure (see AH=13h)

Return: CF clear if successful
       AX = number of bytes read
       DX = ???
   CF set on error
       AX = error code (see INT 61"PC/TCP")

Notes: this function can read from any host or a designated host depending
     on settings in the "addr" structure
   only for use with datagram or Raw descriptors

See Also: INT 61"PC/TCP",INT 61/AH=00h"PC/TCP",INT 61/AH=1Bh,INT 61/AH=1Ch