Date   : Tue, 05 Oct 2004 10:27:23 +0100
From   : Richard_Talbot-Watkins@...
Subject: Re: Load and execution

Tom Walker wrote on 04/10/2004 19:06:27:

> The DNFS instruction book says that this is one of the
> changes from DFS 0.9, that "control characters, top
> bit set characters and DELETE in filenames or disc
> titles" are not allowed. Doesn't say why though.
> Supposedly said files are displayed in *CAT in 0.9, as
> the book mentions coloured filenames in mode 7.

Yes, the Acorn DFS I tried (2.26 in Tom's Model B emulator) wouldn't allow
me to do:

   SAVE CHR$(128+ASC"T")+"EST"

in order to save a top-bit set filename - it just saved a regular file
called "TEST".  BUT if I then set the top bit in a disc editor, and tried
*CAT, the file was hidden, but could still be accessed via LOAD "TEST".

Both Watford and Opus DFSs also seem to support this 'set the top bit to
hide the file', and you can even create them from Basic using the method
above.

Curious feature.



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