| VV(4) | Device Drivers Manual (vax) | VV(4) | 
vv —
vv0 at uba0 csr 0161000 vector vvrint vvxint
The vv interface provides access to a 10
    Mb/s Proteon proNET ring network.
The network address of the interface must be specified with an
    SIOCSIFADDR
    ioctl(2) before data can be
    transmitted or received. It is only permissible to change the network
    address while the interface is marked “down”.
The host's hardware address is discovered by putting the interface in digital loopback mode (not joining the ring) and sending a broadcast packet from which the hardware address is extracted.
Transmit timeouts are detected through use of a watchdog routine. Lost input interrupts are checked for when packets are sent out.
If the installation is running CTL boards which use the old
    broadcast address of ‘0’ instead of
    the new address of ‘0xff’, the define
    OLD_BROADCAST should be specified in the driver.
vv driver appeared in
  4.2BSD.
| February 5, 2019 | NetBSD 9.4 |