NAME

       srec_tektronix - Tektronix hexadecimal file format

DESCRIPTION

       The  Tektronix  hexadecimal  file  format  is  no longer very common.  It serves a similar
       purpose to the Motorola and Intel formats,  usually  used  to  transfer  data  into  EPROM
       programmers.

   The Lines
       Most  Tektronix  hex  files contain only Tektronix hex lines (see the next section), which
       always start with a slash (“/[rq]) character.  There are only two types of  lines  -  data
       lines and a termination line.

   Data Lines
       Data  lines have five fields: address, length, checksum 1, data and checksum 2.  The lines
       always start with a slash (“/[rq]) character.

                         ┌──┬─────────┬────────┬───────────┬──────┬───────────┐
                         │/ │ Address │ Length │ Checksum1 │ Data │ Checksum2 │
                         └──┴─────────┴────────┴───────────┴──────┴───────────┘
       Address This is a 4 character (2 byte) address that specifies where the data in the record
               is to be loaded into memory.

       Data Length
               The data length field is a 2 character (1 byte) field that specifies the number of
               character pairs (bytes) in the data field.  This field never has a value of zero.

       Checksum 1
               The checksum 1 field is a 2 character (1 byte) field.  Its value is the 8‐bit  sum
               of the six 4‐bit values which make up the address and length fields.

       Data    The  data  field  contains  character pairs (bytes); the number of character pairs
               (bytes) is indicated by the length field.

       Checksum 2
               The checksum 2 field is a 2 character (1 byte) field.   Its  value  is  the  least
               significant byte of the sum of the all the 4‐bit values of the data field.

   Termination Line
       Termination  lines  have three fields: address, zero and checksum.  The lines always start
       with a slash (“/[rq]) character.

                                    ┌──┬─────────┬──────┬──────────┐
                                    │/ │ Address │ Zero │ Checksum │
                                    └──┴─────────┴──────┴──────────┘
       Address This is a 4 character (2 byte) address that specifies where to begin execution.

       Zero    The data length field is a 2 character (1 byte) field of value zero.

       Checksum
               The checksum 1 field is a 2 character (1 byte) field.  Its value is the 8‐bit  sum
               of the six 4‐bit values which make up the address and zero fields.

   Size Multiplier
       In  general,  binary data will expand in sized by approximately 2.4 times when represented
       with this format.

EXAMPLE

       Here is an example Tektronix hex file.  It contains  the  data  “Hello,  World[rq]  to  be
       loaded at address 0.
              /00000D0D48656C6C6F2C20576F726C640A52
              /00000000

COPYRIGHT

       srec_cat version 1.64
       Copyright  (C)  1998,  1999,  2000,  2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
       2010, 2011, 2012, 2013, 2014 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.

MAINTAINER

       Scott Finneran   E‐Mail:   scottfinneran@yahoo.com.au
       Peter Miller     E‐Mail:   pmiller@opensource.org.au