 
   PIN (PROCEDURE INTERPRETER) is a task 1/4 the size of the Indirect
 File processor.  It is used identically to ...AT. to control the
 assembly and taskbuild process during program development.  It does
 not recognize the special ...AT. commands.  Rather,  it only accepts
 one line MCR type commands.  If during the execution of any command a
 fatal error is encountered, PIN will cease execution of the command file
 and allow the user to correct for the problem.  A command line creating
 an error is displayed.  By default, other command lines are not displayed.
 PIN assumes that the command file given to it will have the extension
 .PRC (for PRoCedure).  However, if a different extension is explicitly
 used, PIN will use that name in looking for the command file.  

   To use PIN type
			PIN cmdfile
   example:
			PIN MYFILE.PRC
			PIN MYFILE	(assumes .PRC extension)
			PIN MYFILE.CMD
 
~
   MYFILE.PRC might contain commands of the form
 
 ;   		F4P MYFILE.OBJ;1=MYFILE/NOTR
 ;		@BLD MYFILE MYFILE.TSK;1/CP/FP=MIFILE N N N Y
 ;		@OPT MYFILE LIBR=F4PRES:RO
 ;		PIP MYFILE.OBJ;1/DE/NM,MYFILE.OPT;1,MYFILE.BLD;1
		
    PIN also has a number(very limited) of internal commands.  Each internal
 command(which is a part of the command file) is preceded by a $ in column 1.
 The commands are 	$DELETE	- delete the .PRC file on closing
			$NODEL	- do not delete the .PRC file on closing
			$TRACE	- print each command as it is executed
			$NOTRA	- do not print each command.
			$EOW	- exit on warning error.
			$COW	- continue on warning error(the default)
 
 Initiially PIN starts out with NOTRACE, NODELETE, and COW.
