srec_wilson - wilson file format
This is a mystery format, added to support a mysery EPROM loader used
by Alan Wilson <firstname.lastname@example.org>
If you know the true name of this format, please let me know! It bears
a remarkable similarity to the Motorola S‐Record format, however I can
find no reference to a "compressed" Motorola format.
Each line contains normal ASCII characters, and “high bit on[rq]
characters, but the ASCII control characters are avoided (the
high‐bit‐on con characters are not avoided). Normal line termination
characters (CRLF or LF, depending on your system) are used.
The presence of high‐bit‐on characters makes this format unattractive
to send via email, as it must be wrapped as a binary attachment,
increasing its size.
In general, a single byte per byte is used to encode values, however
some values use two bytes, according to the following table:
Byte Value Encoding (1 or 2 chars)
0x00 .. 0x9F 0x40 .. 0xDF
0xA0 .. 0xAF 0x3A 0x30 .. 0x3A 0x3F
0xB0 .. 0xBF 0x3B 0x30 .. 0x3B 0x3F
0xC0 .. 0xCF 0x3C 0x30 .. 0x3C 0x3F
0xD0 .. 0xDF 0x3D 0x30 .. 0x3D 0x3F
oxE0 .. 0xFF 0xE0 .. 0xFF
The rest of this description, when refering to “bytes[rq] means byte
values encoded using the above table.
Each line consists of 5 fields. These are the type field, length field,
address field, data field, and the checksum.
|Type | Record Length | Address | Data | Checksum |
Type The type field is a 1 character field that specifies whether
the record is data (0x43), or termination (0x47).
The record length field is a 1 byte field that specifies the
number of bytes in the record, excluding the type and record
Address This is a 4‐byte address that specifies where the data 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 an 1‐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 length, address,
and data fields.
A record containing data and the 4‐byte address at which the
data is to reside.
A termination record. The address field may contain the 4‐byte
address of the instruction to which control is passed. There
is no data field.
In general, binary data will expand in sized by approximately 1.5 times
when represented with this format.
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/