Reverse engineering a world map file

[lastfun]

yes, after asm 'pack' (see in screen 'body size pack') in 'unpack' -> decompressed file
---upd---
as i promised, a few screenshots ...
from client (pack/unpack):


from my program (pack/unpack):

 

[AcarX]

Don't know how to thank.. Amazing work man really appreciate everything you've done

I do have one little problem though. When I try to unpack a file it's giving me access violation exception at:

jb loop12
inc ecx
push esi
mov esi, edi
sub esi, eax
rep movsb // here

 

[lastfun]

link u version "C" (we will deal )) )
p.s. С++ also had problems due REP

 

[AcarX]

This is how I'm trying to do it

 

[lastfun]

@AcarX
wait, friend)
i'll write you a dll
(x64 with (my laptop) problems - solved, i think ... not at once)
offtop: DNC
I'm glad to see you) you long time not been)

 

[lastfun]

win )))
i'm an idiot)))
this is aPlib compression AcarX use this - http://www.ibsensoftware.com/files/aPLib-1.1.1.zip
method - aP_depack_asm_fast (src, dst)

 

[AcarX]

@lastfun
Thanks that one is working pretty well for both .ma2, ma1 files. I also wrote a packer to put extracted files back into .ma1,ma2 format. Here it is if anyone is interested:
Link