TMSCP(4)               OpenBSD Programmer's Manual (VAX)              TMSCP(4)

NAME
     tmscp - DEC TMSCP magtape interface

SYNOPSIS
     tmscp0 at uba? csr 0174500
     tms0 at tmscp0 drive ?

DESCRIPTION
     Tape controllers compatible with the DEC Tape Mass Storage Control Proto-
     col (TMSCP) architecture such as the TU81 and the TK50 provide a standard
     tape drive interface as described in mtio(4). The controller communicates
     with the host through a packet oriented protocol.  Consult the file
     <vax/tmscp.h> for a detailed description of this protocol.

DIAGNOSTICS
     tmscp controller failed to init.  The controller initialization procedure
     failed.  This probably indicates a hardware problem.

     tmscp%d: sa 0%o, state %d.  (Additional status information given after a
     hard I/O error.)  The values of the controller status register and the
     internal driver state are printed.

     tmscp%d: random interrupt ignored.  An unexpected interrupt was received
     (e.g. when no I/O was pending).  The interrupt is ignored.

     tmscp%d: interrupt in unknown state %d ignored.  An interrupt was re-
     ceived when the driver was in an unknown internal state.  Indicates a
     hardware problem or a driver bug.

     tmscp%d: fatal error (0%o).  The controller detected a ``fatal error'' in
     the status returned to the host.  The contents of the status register are
     displayed.

     OFFLINE.  (Additional status information given after a hard I/O error.)
     A hard I/O error occurred because the drive was not on-line.

     tmscp%d: hard error
     tmscp%d: soft error.  These errors precede an interpretation of a TMSCP
     error message returned by the controller to the host.  TMSCP errors may
     be:

           controller error, event 0%o.
           host memory access error, event 0%o, addr 0%o.
           tape transfer error, unit %d, grp 0x%x, event 0%o.
           STI error, unit %d, event 0%o.
           STI Drive Error Log, unit %d, event 0%o.
           STI Formatter Error Log, unit %d, event 0%o.
           unknown error, unit %d, format 0%o, event 0%o.

SEE ALSO
     mt(1), tar(1), tp(1), ht(4), mt(4), mtio(4), tm(4), ts(4), ut(4),
     dmesg(8)

HISTORY
     The tmscp driver appeared in 4.3BSD.

BUGS
     Should be synced together with the MSCP devices.

OpenBSD 2.9                     January 7, 1996                              1
