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       srec_binary - binary file format


       It is possible to read and write binary files using srec_cat(1).

   File Holes
       A  file  hole  is  a  portion  of  a  regular  file  that contains null
       characters and is not stored in any data block on disk.   Holes  are  a
       long‐standing  feature of Unix files.  For instance, the following Unix
       command creates a file in which the first bytes are a hole:
              $ echo -n "X" | dd of=/tmp/hole bs=1024 seek=6
       Now /tmp/hole has 6,145 characters (6,144 null  characters  plus  an  X
       character), yet the file occupies just one data block on disk.

       File  holes were introduced to avoid wasting disk space.  They are used
       extensively by  database  applications  and,  more  generally,  by  all
       applications that perform hashing on files.

       See  for
       more information.

       The size of binary files is taken from the size of the file on the file
       system.   If  the  file  has  "holes" these will read as blocks of zero
       data, as there is no  elegant  way  to  detect  Unix  file  holes.   In
       general, you probably want to use the -unfill filter to find and remove
       large swathes of zero bytes.

       In producing a binary file, srec_cat(1) honours the address information
       and  places the data into the binary file at the addresses specified in
       the hex file.  This usually results on "holes" in the file.   Sometimes
       alarmingly large file sizes are reported as a result.

       If  you  are on a brain‐dead operating system without file "holes" then
       there are going to be real data blocks containing real zero bytes,  and
       consuming real amounts of disk space.  Upgrade - I suggest Linux.

       To make a file of the size you expect, use
              srec_info foo.s19
       to find the lowest address, then use
              srec_cat foo.s19 -intel -offset -n -o foo.bin -binary
       where  n is the lowest address present in the foo.s19 file, as reported
       by srec_info(1).  The negative offset serves to move the data  down  to
       have an origin of zero.


       srec_binary version 1.55
       Copyright  (C)  1998,  1999,  2000, 2001, 2002, 2003, 2004, 2005, 2006,
       2007, 2008, 2009, 2010 Peter Miller

       The srec_binary program comes with ABSOLUTELY NO WARRANTY; for  details
       use  the ’srec_binary -VERSion License’ command.  This is free software
       and you are welcome to redistribute it under  certain  conditions;  for
       details use the ’srec_binary -VERSion License’ command.


       Peter Miller   E‐Mail:
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