qt —
DEC DELQA-PLUS (DELQA-YM) Q-bus 10 Mb/s Ethernet interface
qt0 at uba? csr 174440
qt1 at uba? csr 174460
The qt interface provides access to a 10 Mb/s Ethernet
  network through a DEC DELQA-YM Q-bus controller.
Each of the host's network addresses is specified at boot time
    with an SIOCSIFADDR
    ioctl(2). The
    qt interface employs the address resolution protocol
    described in arp(4) to
    dynamically map between Internet and Ethernet addresses on the local
    network.
  - qt%d: chained packet.
- A packet received from the network was longer than the allowed max length
      and is therefore discarded. This is usually because a host on the local
      network is behaving badly.
Theqt driver first appeared in
  2.11BSD. It was later ported to
  NetBSD 2.0.