"Hidden" parameters:
DEBUG     ECHO      LPRINT    NOECHO    OVERRIDE  REALTIME

**************************************************************************

OVERRIDE - Overrides severe warnings.  A SEVERE WARNING is a SIOSEIS
           ERROR that can be overriden (ignored) by using OVERRIDE.
           E.G.    override procs diskin agc plot end

**************************************************************************

LPRINT - Nearly every process will print out programmer information in
         both the edit and execute phase.  Some processes will print
         information useful to the user though.  The value associated
         with lprint indicates the type of information to be printed.  
         The value is a bit switch where bit 1 (2**0) indicates that the
         edit parameters are to be printed.  Bit 2 (2**1) indicates that
         the execution module will print some information.

Example:
SIOSEIS << eof
procs diskin prout end 
diskin 
lprint 3 
ipath data end 

data                                                                                               
3  0  0  1  -12345  0  0  366  0  2500  1  0  60  0  0
0.  0  0.  1  -1.000000  0  0  1  1  0.  0.  0  1  0.  0  0  0  0.
Version    2.100000
end 
prout 
     FNO 1 LNO 999 ftr 1 ltr 999 end 
end 
end 
****    0 ERRORS IN THIS JOB   ****
data                                                                                               
1  0  60  0  0  0.  0
0.  1  -1.000000  0  0  1  0.  0.
0  1  0.  0  0  0  0.
binary hdr sort=  1
shot  1   trace   1   rp   0   trace   0
no=  1   itrno=  1   fno=  0   lno=  0   ftr=  -12345   ltr=  0   nextno=  0
nexttr=  -12345   iptype=  1   idtype=  1   jsort=  0
SHOT     1 TRACE     1 RP     0 TRACE     0
shot  2   trace   1   rp   0   trace   0
no=  2   itrno=  1   fno=  0   lno=  0   ftr=  -12345   ltr=  0   nextno=  0
nexttr=  -12345   iptype=  1   idtype=  1   jsort=  0
SHOT     2 TRACE     1 RP     0 TRACE     0
END OF SIOSEIS RUN

**************************************************************************

PROCESS DEBUG

If the word "debug" (without the quotes) is placed in or before the 
procs list, SIOSEIS will print the name of the process prior to executing
each process.  This diagnostic tool is especially useful if SIOSEIS bombs
and you have no idea of where it bombs. For example:

SIOSEIS << eof
     debug procs syn diskoa end 
about to enter edit of   PROCS 
  syn 
   about to enter edit of   SYN   
     ntrcs 1 FNO 1 LNO 2 secs 1 values 1.1 2.2 3.3 4.4 -5.5 end 
  end 
  diskoa 
   about to enter edit of   DISKOA
      opath data  end 
  end 
  end 
 ****    0 ERRORS IN THIS JOB   ****
   ABOUT TO ENTER   SYN   
   ABOUT TO ENTER   DISKOA
   ABOUT TO ENTER   SYN   
   ABOUT TO ENTER   DISKOA
   END OF SIOSEIS RUN

**************************************************************************

NOECHO, ECHO

SIOSEIS release 1991.0 will contain a mechanism for selectively turning
off and on the output printing.  Sometimes a process' parameter list is
very long and clutters up the output print file.  Placing NOECHO prior 
to the process' parameters will stop the echoing of the parameters.  
Placing ECHO after the END terminating the process'parameters turns the
printing on.

**************************************************************************

REALTIME

Process REALTIME is designed to work with process DISKIN for reading
SEG-Y files as the data are acquired.  REALTIME signals DISKIN to check
for an increased file size.  If the file remains the same size for 60 seconds,
DISKIN stops in an orderly manner.