!	HELP for MCV Tape Precis program.
!	23 Nov 82	Bob Langford
1 PRECIS
     The Tape Precis program reads a magnetic tape and prints a 
formatted listing of the contents of the tape, to help identify
what is on the tape.  If any tape or file labels are detected,
the information in them is interpreted.
Format:
	PRECIS     device-name

2 Parameters
device-name
     Specifies the device name of the device the tape is mounted on.
A logical name is allowed for this parameter.  The tape must be 
mounted with the /FOREIGN qualifier in the MOUNT command.
2 Qualifiers
/ASCII
     /ASCII  [D]
     /NOASCII

Specifies that the data on the tape be displayed in ASCII.  Non-printing
characters are converted to periods.  The default is /ASCII.
/EBCDIC
     /EBCDIC
     /NOEBCDIC  [D]

Specifies that the data on the tape be displayed in EBCDIC.  Non-printing
characters are converted to periods.  The default is /NOEBCDIC.
/HEX
     /HEX     [D]
     /NOHEX

Specifies that a hexadecimal dump of the data should be printed.  The
high-order hex character is printed above the low-order hex character,
underneath either the ASCII or EBCDIC versions (if selected).  The 
default is /HEX.
/LABELS
     /LABELS  [D]
     /NOLABELS

Causes PRECIS to attempt to interpret any label records found.  This is
valid for both ANSI and IBM labeled tapes.  A one or two line description
of the contents of the label is printed below each record.  The default
is /LABELS.
/OUTPUT[=file-spec]
     /OUTPUT[=file-spec]   (default = SYS$OUTPUT)
     /NOOUTPUT

Causes the output from PRECIS to be sent to the specified file.  No 
wild-card characters are allowed.  Specifing /NOOUTPUT is equivalent
to /OUTPUT=NLA0:  (the null device).  The default is for the output to
be sent to SYS$OUTPUT.
/REWIND
	/REWIND		[D]
	/NOREWIND

Controls whether or not the tape is rewound before being
scanned.  The default is /REWIND, which rewinds the tape before 
processing.  /NOREWIND starts the scan at the current tape position.
