srec_fairchild - Fairchild Fairbug file format

The Fairchild Fairbug format has 8-byte records. A file begins with an address record and ends with an end-of-file record.

There are three record types in this file format.

Address records are of the form allbox,center,tab(;); lf(CW) l. S;nnnn indicating the address for the following data records.

Data records are of the form allbox,center,tab(;); lf(CW) l l. X;ffffffffffffffff;c Each data record begins with an X and always contains 8 data bytes. The ff characters are hexadecimal byte values (8 bytes). Each data byte is represented by 2 hexadecimal characters. The c character is a hex digit being the the nibble-sum of the data bytes. A 1-digit hexadecimal checksum follows the data in each data record. The checksum represents, in hexadecimal notation, the sum of the binary equivalents of the 16 digits in the record; the half carry from the fourth bit is ignored. The programmer ignores any character (except for address characters and the asterisk character, which terminates the data transfer) between a checksum and the start character of the next data record. This space can be used for comments.

The end-of-file record has the form allbox,center,tab(;); lf(CW). * The last record consists of an asterisk only, which indicates the end of file.

Size Multiplier

Here is an example Fairchild Fairbug file. It contains the data ``Hello, World'' to be loaded at address 0x1000. Notice how the last record is padded with 0xFF bytes.

S1000
X48656C6C6F2C2057C
X6F726C64210AFFFF3
*

version

Copyright Peter Miller;

All rights reserved.

The program comes with ABSOLUTELY NO WARRANTY; for details use the ' -VERSion License' command. This is free software and you are welcome to redistribute it under certain conditions; for details use the ' -VERSion License' command.

tab(;); l r l. Peter Miller;E-Mail:;millerp@canb.auug.org.au /\/\*;WWW:;http://www.canb.auug.org.au/~millerp/