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I used QuickBMS comtype scan and got more than first 40 bytes properly decompressed in EDL2.dmp but the rest is garbled . What is EDL2 btw?
This code snippet is the closes thing I was able to found , packed file at the beginning looks identical but again differs further,
no amout of tweaking N, F TRESHOLD, N_BITS, F_BITS brought desired result.
http://mf.grsu.by/UchProc/livak/po/comprsite/pract_lzss.html
Upload contains compressed, uncompressed file and QBMS result.
https://www72.zippyshare.com/v/o8zbcW1g/file.html