	TIZ is a task to simplify the modification of task image files.
	It offers TKB-like keyword modification of those task attributes
	that are represented as values in label blocks 0-2.

	TIZ can be invoked as an MCR command, by
	     >TIZ [Dumpfile=]Taskfile[Keywords]
	or interactively by
	     >RUN TIZ

	The keywords implimented at the moment are:

	/ASG=dev:lun - LUN assignmnt	/[NO]PM      - Dump on abort
	/[NO]CP      - Checkpointing	/PAR=name    - Partition name
	/[NO]DU      - Dump label blks	/PRI=n       - Priority
	/EXIT        - Update task img	/QUIT        - Dont update tsk
	/HE          - Help message	/[NO]RO      - No task img upd
	/IDENT=idnt  - Task ident	/[NO]SL      - Install slaved
	/[NO]IP      - Map I/O pg OK	/TASK=name   - Task name
	/LIBR=nam:ac - Libr access	/XHR=opt     - Extrnl hdr ctrl

	For additional help, type HELP TIZ COMMAND or HELP TIZ <switch>
2 COMMAND
	The basic TIZ command line is
	[Dumpfile=]Taskfile[Keywords]

	If unspecified, Dumpfile defaults to TI:, and Keywords defaults 
	to /DU/RO. Defaults for Taskfile are:
		Device   SY:
		UIC      Current default
		Name	 No default
		Type     .TSK
		Version  Highest-numbered.

	If you are running interactively, you will be prompted for the 
	task file name, and then for keywords. A null keyword entry 
	closes the current task file as modified (unless /RO is in 
	effect), and prompts for another task name. A null task file 
	entry terminates TIZ. You can override the default dump file in 
	interactive mode by replying
		Dumpfile=Taskfile
	in response to the task file prompt.

	Note that the dump file is opened for append access, with 
	FORTRAN carriage control. This is a feature for those who want 
	to dump a bunch of label blocks, and then edit the output file, 
	searching for tasks with given characteristics.
2 ASG
	The ASG keyword modifies LUN assignments. The syntax is the same
	as for the Task Builder:
		/ASG=dev:lun[:lun ...]

	If the highest-numbered LUN is assigned to OV0:, it is assumed 
	to be the overlay load LUN, and it cannot be modified.
2 CP
	The CP switch determines whether the task is to be installed 
	checkpointable or not. The syntax is the same as for the Task 
	Builder:
		/CP	if the task is to be checkpointable, or
		/-CP	or
		/NOCP	if not.
2 DU
	The DU switch calls for a dump of portions of the task label 
	blocks (it would be a "list", /LI, except that conflicted with 
	the LIBR keyword). Generally, only those items that can be 
	modified by TIZ are dumped; however, the entire Task Flags Word 
	is dumped even though not all bits can be modified. The meanings 
	of the mnemonics are:
	 PIC  Task Contains Position-Independent code (built with /PI);
	-HDR  Task has no header (built with /-HD);
	 ACP  Task is an ACP (built with /AC);
	 PMD  Produce a postmortem dump on abort (built with /PM);
	 SLV  Install task with slave attribute (built with /SL);
	-SND  Task may not recieve messages (built with /-SE);
	 PRV  Task is privileged (built with /PR);
	 CMP  Task is built in compatibility mode (/CM);
	-CHK  Task is not checkpointable (built with /-CP);
	 RES  Task has memory-resident overlays (built with /RO);
	-IOP  Priv. task purposely overmaps I/O page (built with /IP);
	 SUP  Task is supervisor mode library (built with CMPRT option);
	 XHR  Task requests external header (built with /XH);
	-XHR  Task requires pool-resident header (built with /-XH).
2 EXIT
	The EXIT keyword causes the current task image to be updated
	and closed. TIZ will then prompt you for another task image.
	You can abbreviate EXIT to two characters. Control/Z is
	equivalent to the EXIT keyword.
2 HE
	The HE switch causes help text to be printed. If TIZ is invoked 
	as an MCR command, it may be specified on a line by itself:
		>TIZ /HE
	If you are using TIZ interactively, you can get help in response 
	to the task file prompt by entering
		/HE
	You can also get help in response to a keyword prompt. The help 
	message is the same in all cases.
2 IDENT
	The IDENT keyword specifies the task's identification string.
	The syntax is similar to the task builder:
		/IDENT=ident
	The ident is an arbitrary RAD-50 string of 6 characters or less,
	used to identify revision level or whatever. It is displayed
	for installed tasks by the TAS command.
2 IP
	The IP switch causes the INStall error message

	    INS -- Warning -- Privileged task overmaps the I/O page

	to be supressed. This is useful only on a /PR task that is over 
	8KW. The syntax is the same as for the task builder:
		/IP	To allow the message,
		/-IP	or
		/NOIP	to supress the message.
2 LIBR
	The LIBR keyword changes the access rights of a task to a 
	resident library or resident common. The syntax is the same as 
	for the task builder:
		/LIBR=name:RW[:new]	for read/write access, or
		/LIBR=name:RO[:new]	for readonly access.
	The "name" parameter must be the name of a library the task was
	built against, or an asterisk to change access for all user mode
	libraries. The optional "new" parameter (square brackets are not
	part of the syntax) changes the name of the library or common
	the task is mapped to. NOTE THAT THE ENTRY POINTS TO THE NEW
	LIBRARY MUST BE THE SAME AS TO THE OLD LIBRARY OR YOUR TASK WILL
	NOT WORK. You cannot modify the access to a supervisor mode
	library with this keyword.
2 PM
	The PM switch causes the task to generate a postmortem dump if 
	aborted (and if PMD... is installed). The syntax is the same as 
	for the task builder:
		/PM	to generate a post mortem dump, or
		/-PM	or
		/NOPM	to supress the postmortem dump.
2 PAR
	The PAR keyword specifies the name of the default partition for 
	the task. The syntax is similar to the task builder:
		/PAR=name
	Note that you cannot specify partition base address or partition 
	length on this keyword. If the task is to be run on an unmapped 
	system, the new partition should have the same base address as 
	the old partition.
2 PRI
	The PRI keyword specifies the priority at which the task is to 
	run. The syntax is the same as for the task builder:
		/PRI=n
	where "n" is a decimal number in the range 0 to 250.
2 QUIT
	The quit keyword causes TIZ to close the current task image
	without modification. TIZ will then prompt you for another
	task image. You can abbreviate QUIT to two characters.
2 RO
	The RO switch governs whether the modifications made by TIZ 
	should be written back into the task image. It has no relation 
	to the "/RO" taskbuilder switch. The syntax is:
		/RO	Don't update task image
		/-RO	or
		/NORO	update task image.
	Note that the task image file is not updated "on the fly". The 
	three label blocks are read into an internal buffer and modified 
	there. When in interactive mode, the task image is only updated 
	at a null response to the keyword prompt. Asserting the RO 
	switch at any time prior to this point prevents the update. You 
	must specify this switch for each task image you don't want 
	updated; the setting is not "latched".
2 SL
	The SL switch requests that thte task be installed with the 
	slave attribute. The syntax is the same as for the task builder:
		/SL	to install slaved, or
		/-SL	or
		/NOSL	to install without the slave attribute.

	Note that a task whose name is of the form "...xxx" cannot be 
	installed slaved. TIZ will issue a warning message when the task 
	file is updated if you create such a task.
2 TASK
	The TASK keyword specifies a task name. The syntax is the same 
	as for the task builder:
		/TASK=name.
	You can give a null name.

	Note that a task whose name is of the form "...xxx" cannot be 
	installed slaved. TIZ will issue a warning message when the task 
	file is updated if you create such a task.
2 XHR
	The XHR keyword determines whether a task is to be installed 
	with external headers (RSX-11M+ V2.0) or alternate headers 
	(RSX-11M V4.0). The syntax is different from the syntax for the 
	task builder /XH switch:
		/XHR=NO     Task can't be installed with external header
		/XHR=MAYBE  Take default built into INStall
		/XHR=YES    Install with external header unless 
				overridden by INStall.
