Re: not there yet (FAQ info)

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

Nathan Mates <nathan@visi.com> wrote:

> In article <19970323155341145661@dempson.actrix.gen.nz>,
> David Empson <dempson@actrix.gen.nz> wrote:
> >> And magic number in applesoft is exactly what it's supposed to be
> >> AND the file creator/type changer are exactly what they are
> >> supposed to be--TTXT and PDOS.
> 
> >Those should be 'TEXT' and 'pdos'.
> 
>    That's exactly what I mention in the FAQ. David-- is this info from
> a Mac tech note, manual, or the like?

Apple IIgs documentation on the HFS and AppleShare FSTs.  That would be
in the Programmer's Guide to System 6.0.1, GS/OS Reference, and possibly
also the AppleShare Programmer's Guide to the Apple II Family.

None of these references specifically cover the Mac-based options for
copying files to ProDOS disks, but they at least explain the standards
for storing ProDOS files on Mac disks, and the translation method for
the filetype/auxtype (ProDOS) to/from filetype/creator (HFS).

I've never seen any documentation on how PC Exchange handles this, but
derived my description from experimentation and deduction from the
documentation I do have.

>    Would anyone who cares to try this, copy a file with the
> filetype/creator set to that above, and see if a resource fork has
> been attached to it on an Apple II. Note Mac model, OS version,
> patches, and versions of any/all programs used to copy the files,
> change filetypes, etc.

The program used to change filetypes is irrelevant, assuming it doesn't
do anything else to the file.  I've used Snitch and ResEdit's
File/Folder Info command.

I have done this on a PowerMac (7600) running System 7.5.3 and 7.5.5
with appropriate versions of PC Exchange installed.  Finder was used for
everything.  Copying went to a ProDOS floppy (either 800KB or 1.44MB, I
forget which).  Files verified under ProDOS-8 on a IIgs.

In the most convoluted case, I deliberately created a text file
(SimpleText, if I remember right), verified it had no resource fork,
manually set the file type and creator to TEXT/pdos, and copied it to a
ProDOS disk.  No problem at all.  I also copied the SimpleText file (no
resource fork, but creator was 'ttxt') and it ended up as an extended
file with an empty resource fork.

This proves that the wrong creator is sufficient to cause a problem.

I don't have a 68K Mac, so I can't try that.  I also cannot run older
versions of PC Exchange, or the "ProDOS File System Extension", which
might work differently.

-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand