srec_dec_binary - DEC Binary (XXDP) file format
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
The field are defined as follows:
- Two byte little‐endian value. Must always be 1.
- Two byte little‐endian value. This is the number of
bytes in the data, plus six.
- Two byte little‐endian value. This is the load
address of the data.
- The data is simple raw bytes. There are (length‐6)
- 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.
In general, raw binary data will expand in sized by approximately 1.03 times
when represented with this format.
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
2009, 2010, 2011 Peter Miller
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