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srec_formatted_binary - Formatted Binary file format

srec_formatted_binary(5) File Formats Manual srec_formatted_binary(5)


srec_formatted_binary - Formatted Binary file format


This is the PDP‐11 paper tape format, described in the DEC‐11‐GGPC‐D PDP‐11 "Paper Tape Software Programming Handbook" 1972.
The file starts with a character sequence which appears as an arrow when punched on 8‐hole paper tape.
0x08, 0x1C, 0x2A, 0x49, 0x08, 0x00
Then follows a byte count, encoded big‐endian in the low 4 bits of the next 4 bytes. The high bits should be zero.
Then follows a 0xFF byte.
The data follows, as many bytes as specified in the header.
The trailer consists of the following bytes:
0x00, 0x00,
and then a 2‐byte checksum (big‐endian).
The alternate header sequence
0x08, 0x1C, 0x3E, 0x6B, 0x08, 0x00
is followed by an 8‐nibble big‐endian byte count.

Size Multiplier

In general, binary data will expand in sized very little when represented with this format.


Here is a hex dump of a formatted binary file containing the data "Hello, World!".
0000: 08 1C 2A 49 08 00 00 00  ..*I....
0008: 00 0E FF 48 65 6C 6C 6F  ...Hello
0010: 2C 20 57 6F 72 6C 64 21  , World!
0018: 0A 00 00 04 73           ....s
srec_cat version 1.58
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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.


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SRecord Reference Manual