NAME

       srec_dec_binary - DEC Binary (XXDP) file format

DESCRIPTION

       The DEC Binary (XXDP) format was used on the PDP 11 series machines.  This is a binary format, and is not
       readable or editable with a text editor.  The file consists of records of the form
                                 ┌──────┬────────┬─────────┬────────────┬──────────┐
                                 │ type │ length │ address │ ...data... │ checksum │
                                 └──────┴────────┴─────────┴────────────┴──────────┘
       The field are defined as follows:

       type    Two byte little‐endian value.  Must always be 1.

       length  Two byte little‐endian value.  This is the number of bytes in the data, plus six.

       address Two byte little‐endian value.  This is the load address of the data.

       data    The data is simple raw bytes.  There are (length‐6) of them.

       checksum
               The checcksum is a single byte.  It is the negative of the simple summ of all the header and data
               bytes.

       If  the record length is exactly 6 (i.e. no data), this is the execution start address record, indicating
       the transfer address.

       In addition there may be NUL padding characters between records.  It is common for records to  be  padded
       so  that  they  start  on even byte boundaries.  In the days of paper tape, it was common for the file to
       have many leading NULs, to generate blank leader on the tape.

   Size Multiplier
       In general, raw binary data will expand in sized by approximately 1.03 times when represented  with  this
       format.

COPYRIGHT

       srec_cat version 1.58
       Copyright  (C)  1998,  1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Peter
       Miller

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

AUTHOR

       Peter Miller   E‐Mail:   pmiller@opensource.org.au
       /\/\*             WWW:   http://miller.emu.id.au/pmiller/

Reference Manual                                     SRecord                                  srec_dec_binary(5)