Provided by: srecord_1.56-1build1_i386
srec_stewie - Stewie's binary file format
If you have a URL for documentation of this format, please let me know.
Any resemblance to the Motorola S‐Record is superficial, and extends
only to the data records. The header records and termination records
are completely different. None of the other Motorola S‐Records record
type are available.
All records start with an ASCII capital S character, value 0x53,
followed by a type specifier byte. All records consist of binary
The Header Record
Each file starts with a fixed four byte header record.
│0x53 │ 0x30 │ 0x30 │ 0x33 │
The Data Records
Each data record consists of 5 fields. These are the type field, length
field, address field, data field, and the checksum. The lines always
start with a capital S character.
│0x53 │ Type │ Record Length │ Address │ Data │ Checksum │
Type The type field is a one byte field that specifies whether the
record has a two‐byte address field (0x31), a three‐byte
address field (0x32) or a four‐byte address field (0x33). The
address is big‐endian.
The record length field is a one byte field that specifies the
number of bytes in the record following this byte.
Address This is a 2‐, 3‐ or 4‐byte address that specifies where the
data in the record is to be loaded into memory.
Data The data field contains the executable code, memory‐loadable
data or descriptive information to be transferred.
The checksum is a one byte field that represents the least
significant byte of the one's complement of the sum of the
values represented by the bytes making up the record's length,
address, and data fields.
The Termination Record
Each file ends with a fixed two byte termination record.
│0x53 │ 0x38 │
In general, binary data will expand in sized by approximately 1.2 times
when represented with this format.
Here is an hex‐dump example file. It contains the data “Hello,
World[rq] to be loaded at address 0.
0000: 53 30 30 33 53 31 10 00 00 48 65 6C 6C 6F 2C 20 S003S1...Hello,
0010: 57 6F 72 6C 64 0A 9D 53 38 World..S8
srec_cat version 1.56
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: firstname.lastname@example.org
/\/\* WWW: http://miller.emu.id.au/pmiller/