157 lines
4.6 KiB
Groff
157 lines
4.6 KiB
Groff
.\" Copyright (c) 1983, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)uu.4 8.1 (Berkeley) 6/5/93
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.\"
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.Dd June 5, 1993
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.Dt UU 4 vax
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.Os BSD 4.2
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.Sh NAME
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.Nm uu
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.Nd
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.Tn TU58 Ns / Tn DECtape II UNIBUS
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cassette interface
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.Sh SYNOPSIS
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.Cd "options UUDMA"
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.Cd "device uu0 at uba0 csr 0176500 vector uurintr uuxintr"
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.Sh DESCRIPTION
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The
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.Nm uu
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device provides access to dual
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.Tn DEC
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.Tn TU58
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tape cartridge drives
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connected to the
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.Tn UNIBUS
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via a
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.Tn DL11-W
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interface module.
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.Pp
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The interface supports only block
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.Tn I/O
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to the
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.Tn TU58
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cassettes (see
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.Xr physio 4 ) .
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The drives are normally manipulated with the
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.Xr arff 8
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program using the ``m'' and ``f'' options.
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.Pp
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The driver provides for an optional write and verify
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(read after write) mode that is activated by specifying the
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``a'' device.
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.Pp
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The
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.Tn TU58
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is treated as a single device by the system even
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though it has two separate drives,
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.Sq Li uu0
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and
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.Sq Li uu1 .
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If there is
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more than one
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.Tn TU58
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unit on a system, the extra drives
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are named
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.Sq Li uu2 ,
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.Sq Li uu3
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etc.
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.Sh NOTES
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Assembly language code to assist the driver in handling
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the receipt of data (using a pseudo-dma approach) should
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be included when using this driver; specify
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.Sq Li options UUDMA
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in the configuration file.
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.Sh FILES
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.Bl -tag -width /dev/uu?a -compact
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.It Pa /dev/uu?
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.It Pa /dev/uu?a
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.El
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.Sh DIAGNOSTICS
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.Bl -diag
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.It uu%d: no bp, active %d.
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A transmission complete interrupt was received with no outstanding
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.Tn I/O
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request. This indicates a hardware problem.
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.Pp
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.It uu%d protocol error, state=%s, op=%x, cnt=%d, block=%d.
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The driver entered an illegal state. The information printed
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indicates the illegal state, the
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operation currently being executed,
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the
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.Tn I/O
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count, and the block number on the cassette.
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.Pp
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.It uu%d: break received, transfer restarted.
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The
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.Tn TU58
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was sending a continuous break signal and had
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to be reset. This may indicate a hardware problem, but
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the driver will attempt to recover from the error.
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.Pp
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.It uu%d receive state error, state=%s, byte=%x.
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The driver entered an illegal state in the receiver finite
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state machine. The state is shown along with the control
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byte of the received packet.
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.Pp
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.It uu%d: read stalled.
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A timer watching the controller detected no interrupt for
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an extended period while an operation was outstanding.
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This usually indicates that one or more receiver interrupts
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were lost and the transfer is restarted.
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.Pp
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.It uu%d: hard error bn%d, pk_mod %o.
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The device returned a status code indicating a hard error. The
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actual error code is shown in octal. No retries are attempted
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by the driver.
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.El
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.Sh ERRORS
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The following errors may be returned:
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.Bl -tag -width [ENXIO]
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.It Bq Er ENXIO
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Nonexistent drive (on open);
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offset is too large or bad (undefined)
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.Xr ioctl 2
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code.
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.It Bq Er EIO
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Open failed, the device could not be reset.
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.It Bq Er EBUSY
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Drive in use.
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.El
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.Sh SEE ALSO
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.Xr tu 4 ,
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.Xr arff 8
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.Sh HISTORY
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The
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.Nm
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driver appeared in
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.Bx 4.2 .
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