Command line compressor by Emmanuel Marty
The compression is done as follows:

lzsa.exe -f2 -r <sourcefile> <outfile>

where option -f2 selects lzsa version 2 compression.
where option -r asks for the generation of raw (frame-less) data.

Original compression source code and files available here:

Latest github code:
 https://github.com/emmanuel-marty/lzsa
Implementation example (older version):
 https://cpcrulez.fr/applications_tools_cruncher_LZSA2_Z80.htm
x86 lzsa compressor application:
 http://www.pouet.net/prod.php?which=81573