srec_formatted_binary(5)

NAME

srec_formatted_binary - Formatted Binary file format

DESCRIPTION

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 startes with a charcter 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.

EXAMPLE

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

COPYRIGHT

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.

AUTHOR

Peter Miller E-Mail: pmiller@opensource.org.au
/\/\* WWW: http://miller.emu.id.au/pmiller/

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