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! d i g i t a l !   I N T E R O F F I C E  M E M O R A N D U M
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				       Date: 19-February-82
				       From: TSG/NCSS
				       Loc:  MR1-2/H22
				       Ext:  HOTLINE  5911
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Subj:	DDT11 Command Files
.subtitle Subj:	DDT11 Command Files
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Included on the tape are six files which will help you look at
RSX20F dumps.  Used in conjunction with DDT11 these files will
help you examine some common points of interest in your dumps.
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DDT11 has a facility invoked by the $Y command which allows it to
execute a file of DDT11 commands as if you had typed the commands yourself.
The information extracted may be saved in a disk file or appear on your
terminal.
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The files we have included which may be used in this way are:
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.le;ATL.DDT - A command file to show the active task list.
.le;DUMPFE.DDT - A command file to show RSX20F version number,
crash code, date of crash, saved stack pointer,
and other information which identifys the dump.
.le;TO11Q.DDT - A command file to show the contents of the TO11Q.
.le;TTTBL.DDT - A command file to show the contents to the terminal
line blocks.
.le;ST1445.DDT - A command file of symbols which are needed to use
the command file IOPAGE.DDT.
.le;IOPAGE.DDT - A command file that will show the contents of the IO
page saved by RSX20F during a crash.
.els
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If you wanted to use the command file DUMPFE.DDT to look at a dump
and save the output in a file called JAN7.DMP you would enter the following
dialogue with a running DDT11.
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$Y			;escape Y to show that you want to use a
			;command file



Log responses where: JAN7.LOG	;tell DDT11 to put the output in a
				;disk file to see the output on the
				;terminal type TTY:<cr>

FILE:	DUMPFE			;tell DDT11 which command file to use

File DSK:JAN7.DMP 16:20 7-Jan-82 written	;the file is written 

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The command file ST1445.DDT contains additional symbol definations which
make the output from IOPAGE.DDT readable.  To use IOPAGE you first must
cause DDT11 to "take" the file ST1445.  You must SAVE this new copy of DDT11.  
Next RUN your new copy of DDT11 and "take" the file IOPAGE.DDT and proceed
as above.
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The dialogue to accomplish this would look like this:
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RUN DDT11

DDT11 6(67)

Input: VB1445.MAP/FESYMB	;load RSX20F's symbols

Input:/GO			;start DDT11 so we can execute
				;command files.

$Y				;we wish to use a command file

Log responses where:	TTY:	;say tty for conservations sake

FILE:	ST1445.DDT		;take this file

DDT11 and the file will now output information to your screen.
When they finish type:
 
^Z
SAVE NEWDDT	;save DDT11 with the symbols from ST1445
RUN NEWDDT	;run this new DDT11 and "take" the file
		;IOPAGE as shown above.
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To learn more about the meaning of the information which the
command files will extract from dumps read the RSX20F manual 
which is a part of your monitor notebook set.
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There are also text and comments in the command files themselves
which will be helpful.  Read the command files for this information
even if you are not currently interested in how the files are constructed.