1srec_brecord(5) File Formats Manual srec_brecord(5)
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6 srec_brecord - Freescale MC68EZ328 Dragonball bootstrap record format
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9 This data format is understood by Freescale MC68EZ328 Dragonball series
10 processors on their internal UART.
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12 Lines
13 Each line contains hexadecimal data, each byte represented by two hexa‐
14 decimal nybbles in upper case. Characters not in this set, but larger
15 than 0x30 (e.g. lower case) will be ignored, less than 0x30 (e.g. CR or
16 LF) are considered record terminators. Comments are problematic; don't
17 try this at home.
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19 Fields
20 Each line contains a 4‐byte address (big endian), a 1‐byte length‐and‐
21 mode, and then data bytes as dictated by the length. There is no
22 checksum. A zero length record is an execution start address record,
23 non‐zero length records are data.
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25 ┌──┬───┬───┬───┬───┬───┬───┬───┬───┬────┬─────┬───┐
26 │1 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7 │ 8 │ 9 │ 10 │ ... │ n │
27 ├──┴───┴───┴───┴───┴───┴───┴───┼───┴────┼─────┴───┤
28 │ Address │ Length │ Data │
29 └──────────────────────────────┴────────┴─────────┘
30 The length‐and‐mode byte is formatted as follows:
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32 ┌──┬───┬───┬───┬───┬───┬───┬───┐
33 │7 │ 6 │ 5 │ 4 │ 3 │ 2 │ 1 │ 0 │
34 ├──┴───┼───┼───┴───┴───┴───┴───┤
35 │Mode │ R │ Length │
36 └──────┴───┴───────────────────┘
37 Mode These bits are ignored by SRecord in input (00 = bytes, 01 =
38 half words, 10 is reserved, 11 = long words). These bits are
39 always zero on output by SRecord.
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41 R This bit indicates a data read rather than a data write;
42 SRecord does not accept input files with this bit set, and will
43 not set it on output.
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45 Length The length of the records data bytes. It does not include the
46 address or length bytes. The maximum payload of a record is 31
47 bytes of data.
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49 Size Multiplier
50 In general, binary data will expand in sized by at least 2.35 times
51 when represented with this format.
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54 Here is an example b‐record format file. It contains the data “Hello,
55 World” to be loaded at address 0.
56 000000000D48656C6C6F2C20576F726C640A
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59 http://www.freescale.com/files/32bit/doc/ref_manual/MC68VZ328UM.pdf
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62 srec_cat version 1.64
63 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
64 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Peter Miller
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66 The srec_cat program comes with ABSOLUTELY NO WARRANTY; for details use
67 the 'srec_cat -VERSion License' command. This is free software and you
68 are welcome to redistribute it under certain conditions; for details
69 use the 'srec_cat -VERSion License' command.
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72 Scott Finneran E‐Mail: scottfinneran@yahoo.com.au
73 Peter Miller E‐Mail: pmiller@opensource.org.au
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77Reference Manual SRecord srec_brecord(5)