Re: Unpacking $8102 and $8000 archives???

[dempson@swell.actrix.gen.nz (David Empson)]

In article <1993Sep6.155527.10384@pro-freedom.van.wa.us> colbyp@pro-freedom.van.wa.us (Colby Pederson) writes:
>   I recently downloaded a few files.  After using Binscii on them I tried
> to unpack them.  But ShrinkIt and GS Shrinkit didn't recognize it as an
> archive.  I checked to see the auxilliary type and one said $8000 and the
> other said $8102.

Presumably the filetype is $E0 (LBR).

Auxiliary type $8000 is a "Binary II file".  This means it should
contain one or more compresed or uncompressed files, with a Binary 
II header for each file.  This auxiliary type is supposed to be used
for .BXY, .BNY and .BQY files.

ShrinkIt and ShrinkIt GS can both handle this type of file, and should
both recognise it.  If they don't, you can tell both of them to list
all files (and not just archive files).

If you get some kind of message claiming that the archive is not
recognised, then it is probably corrupted.


Auxiliary type $8102 is not defined.  It is actually supposed to be
Auxiliary type $8002 (NuFX, i.e. ShrinkIt archive).

The unusual auxiliary type is caused by a bug in GSCII+: whenever it
encodes a ShrinkIt archive (or any other file with auxiliary type
greater than $8000) as a BinSCII file, it adds $0100 to the auxiliary type.

Just tell ShrinkIt to display all files, and it should recognise and
unshrink the file.
-- 
David Empson                                                               
dempson@swell.actrix.gen.nz                                                
Snail mail: P.O. Box 27-103, Wellington, New Zealand