table of contents
srec_logisim.5(5) | File Formats Manual | srec_logisim.5(5) |
NAME¶
srec_logisim - format Logisim EPROM load files
DESCRIPTION¶
The file format used for image files is intentionally simple; this permits you to write a program, such as an assembler, that generates memory images that can then be loaded into memory. As an example of this file format, if we had a 256‐byte memory whose first five bytes were 2, 3, 0, 20, and -1, and all subsequent values were 0, then the image would be the following text file.
02 03 00 14 ff
The image file can use run‐length encoding; for example, rather than list the value 00 sixteen times in a row, the file can include 16*00 rather than repeat 00 sixteen times. Notice than the number of repetitions is written in base 10. Files produced by Logisim will use run‐length encoding for runs of at least four values
Size Multiplier¶
In general, binary data will expand in sized by approximately 2.95 times when represented with this format.
Commentary¶
This format is particularly deficient.
- •
- The is no way for changing address in‐flight. And therefore the format can't have holes in the data.
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- There are no checksums, or any other error checking.
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- There is no provision for a comment header, as distinct to the “v2.0 raw” magic number.
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- There is no provision for an execution start adddress.
SEE ALSO¶
http://ozark.hendrix.edu/~burch/logisim/docs/2.3.0/guide/mem/menu.html
COPYRIGHT¶
srec_logisim.5 version 1.65
Copyright (C) 1998... Peter Miller
The srec_logisim.5 program comes with ABSOLUTELY NO
WARRANTY; for details use the 'srec_logisim.5 -VERSion License'
command. This is free software and you are welcome to redistribute it under
certain conditions; for details use the 'srec_logisim.5 -VERSion
License' command.
MAINTAINER¶
Scott Finneran | E‐Mail: | scottfinneran@yahoo.com.au |
Peter Miller | E‐Mail: | pmiller@opensource.org.au |
SRecord | Reference Manual |