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srec_stewie(5) |
FreeBSD File Formats Manual |
srec_stewie(5) |
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 bytes.
Each file starts with a fixed four byte header record.
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.
- Record Length
- 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.
- Checksum
- 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.
Each file ends with a fixed two byte termination record.
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 1.64
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.
Scott Finneran |
E‐Mail: |
scottfinneran@yahoo.com.au |
Peter Miller |
E‐Mail: |
pmiller@opensource.org.au |
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