.\" $NetBSD: uu.4,v 1.15 2017/08/01 11:11:17 wiz Exp $ .\" .\" Copyright (c) 1983, 1991, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" from: @(#)uu.4 8.1 (Berkeley) 6/5/93 .\" .Dd February 17, 2017 .Dt UU 4 vax .Os .Sh NAME .Nm uu .Nd .Tn TU-58 Ns / Ns Tn DECtape II UNIBUS cassette interface .Sh SYNOPSIS .Cd "options UUDMA" .Cd "uu0 at uba0 csr 0176500 vector uurintr uuxintr" .Sh DESCRIPTION NOTE: This driver has not been ported from .Bx 4.4 yet. .Pp The .Nm uu device provides access to dual .Tn DEC .Tn TU-58 tape cartridge drives connected to the .Tn UNIBUS via a .Tn DL-11W interface module. .Pp The interface supports only block .Tn I/O to the .Tn TU-58 cassettes (see .Xr physio 4 ) . The drives are normally manipulated with the .Xr arff 8 program using the ``m'' and ``f'' options. .Pp The driver provides for an optional write and verify (read after write) mode that is activated by specifying the ``a'' device. .Pp The .Tn TU-58 is treated as a single device by the system even though it has two separate drives, .Sq Li uu0 and .Sq Li uu1 . If there is more than one .Tn TU-58 unit on a system, the extra drives are named .Sq Li uu2 , .Sq Li uu3 etc. .Sh NOTES Assembly language code to assist the driver in handling the receipt of data (using a pseudo-DMA approach) should be included when using this driver; specify .Sq Li options UUDMA in the configuration file. .Sh FILES .Bl -tag -width /dev/uu?a -compact .It Pa /dev/uu? .It Pa /dev/uu?a .El .Sh DIAGNOSTICS .Bl -diag .It uu%d: no bp, active %d. A transmission complete interrupt was received with no outstanding .Tn I/O request. This indicates a hardware problem. .It uu%d protocol error, state=%s, op=%x, cnt=%d, block=%d. The driver entered an illegal state. The information printed indicates the illegal state, the operation currently being executed, the .Tn I/O count, and the block number on the cassette. .It uu%d: break received, transfer restarted. The .Tn TU-58 was sending a continuous break signal and had to be reset. This may indicate a hardware problem, but the driver will attempt to recover from the error. .It uu%d receive state error, state=%s, byte=%x. The driver entered an illegal state in the receiver finite state machine. The state is shown along with the control byte of the received packet. .It uu%d: read stalled. A timer watching the controller detected no interrupt for an extended period while an operation was outstanding. This usually indicates that one or more receiver interrupts were lost and the transfer is restarted. .It uu%d: hard error bn%d, pk_mod %o. The device returned a status code indicating a hard error. The actual error code is shown in octal. No retries are attempted by the driver. .El .Sh ERRORS The following errors may be returned: .Bl -tag -width [ENXIO] .It Bq Er ENXIO Nonexistent drive (on open); offset is too large or bad (undefined) .Xr ioctl 2 code. .It Bq Er EIO Open failed, the device could not be reset. .It Bq Er EBUSY Drive in use. .El .Sh SEE ALSO .Xr vax/tu 4 , .Xr arff 8 .Sh HISTORY The .Nm driver appeared in .Bx 4.2 .