srec_fairchild - Fairchild Fairbug file format
The Fairchild Fairbug format has 8‐byte records. A file begins with an
address record and ends with an end‐of‐file record.
There are three record types in this file format.
Address records are of the form
indicating the address for the following data records.
Data records are of the form
Each data record begins with an X and always contains 8 data bytes. The
characters are hexadecimal byte values (8 bytes). Each data byte is
represented by 2 hexadecimal characters. The c
character is a hex digit
being the the nibble‐sum of the data bytes. A 1‐digit
hexadecimal checksum follows the data in each data record. The checksum
represents, in hexadecimal notation, the sum of the binary equivalents of the
16 digits in the record; the half carry from the fourth bit is ignored. The
programmer ignores any character (except for address characters and the
asterisk character, which terminates the data transfer) between a checksum and
the start character of the next data record. This space can be used for
The end‐of‐file record has the form
The last record consists of an asterisk only, which indicates the end of file.
In general, binary data will expand in sized by approximately 2.4 times when
represented with this format.
Here is an example Fairchild Fairbug file. It contains the data “Hello,
World[rq] to be loaded at address 0x1000. Notice how the last record is padded
with 0xFF bytes.
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