Re: Having trouble downloading ShrinkIt archives

[sacredring@my-deja.com]

Thanks Andy. And, thank you for providing the Apple ][ community with
ShrinkIt and Nulib.

It turns out that nulib and nulib2 report no errors on the downloaded
ShrinkIt disk image after all. After uncompressing ShrinkIt for ProDOS
8, the file size is 143360 bytes, identical to a full 5.25" disk image.
I tried plugging this into the emulator's floppy driver but for some
reason it's not working. The emulator I'm using (KEGS) works fine for
most other disk images. I'll have to investigate this a bit further.

--Sacred Ring

In article <8v9i0v$3qp$1@spies.com>,
  fadden@spies.com (Andy McFadden) wrote:

> Neither nulib nor nulib2 will silently extract bad data.  If the data
> is CRCed, an error will be reported.
>
> It is possible to create an SHK archive with ProDOS 8 ShrinkIt that
> lacks a CRC, because the CRC is only computed as part of the LZW
> compression process.  If the disk image were stored uncompressed with
> P8 ShrinkIt, there would be no CRC to compare against.  However, this
> is not how images are typically stored.
>
> If you're unpacking with nulib2, you should be getting 100% good data.
> If you are unpacking the same thing with ShrinkIt, and getting the
same
> results (no CRC errors, but disk images don't work), the problem is
most
> likely not with how you are downloading the SHK files, but rather with
> how you are using them.
>
> [ posted and Cc:ed to mail ]
>
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