[Coco] AR, etc & incompatible formats

[Neil Morrison]

I tried to figure out the algorithms used but gave up in the finish. Too bad 
as I hoped I could have rewritten it for VB say, on a PC.

Neil

----- Original Message ----- 
From: "Dean Leiber" <adit at 1stconnect.com>


> There was also an Ar1.4 and an Ar1.5. If memory serves AR1.5 was the
> 'problem' child. It creates AR archives which, obviously the older ARs
> can't open, but neither can Ar2.0. I keep a copy of Ar1.5 around just to
> break these problem archives.
>
> There was also a non standard LZH archive format as well. The program
> which created it was conveniently called LZH as well! The deal was if you
> didn't use the correct option you'd get a LZH archive other archivers
> couldn't open. I keep a copy of that around as well.
>
> OS-9 also had the following other formats:
>
> .Z - A compressed file from Unix typically. There was a compress utility
> for OS-9
> .Tar - A Unix Tar archive. I believe OS-9 has a tar utility as well
> .Arc - There was an OS-9 version of this archiver (os9arc & dearc I think)
> .Pak - I think its an OS-9 only format. It was popular at one point, but
> AR quickly replaced it. There are still PAK archives floating around on
> my backup disks.
> .lha/.lzh - There was a lha utility, and an unlzh (or was it unlha), not
> to mention the above LZH.
>
> Also, as a side note on OSK, there was a utility to break .Sit archives
> (popular on the mac) but only SIt files created by the very first SIT.
> Apparently it was very similar to compress internally. I remember porting
> it from Unix but I don't know if its still floating around anywhere
> anymore.
>
> Dean