you didn't explained what the code is supposed to do... but it seems some arbitrary code to decompress strings that are stored by means of stripping some letters.

since the 14 more used characters start with "e" the words probably are from English language

in "cjne a,#15,dcomp4 "
the nibble 0x0f (15, decimal) seems to be used as a marker for the least used characters, if the nibble isn't 0x0f then the program jumps to "decomp4" that is the part that deals with the most used characters

so it seems :-)

hth

orlando