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
|S | nnnn |
indicating the address for the+following+data records.
Data records are of the form
|X | ffffffffffffffff | c |
Each data record begins-with-an-X-and-always+-contains 8 data bytes.
The ff 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 comments.
The end‐of‐file record has the form
The last record consists of an asterisk only, which indicates the end
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.
srec_cat version 1.55
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
2007, 2008, 2009, 2010 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.
Peter Miller E‐Mail: email@example.com
/\/\* WWW: http://miller.emu.id.au/pmiller/