Hmm, but the TK2 Manual states about OPEN_DIR, so, apart from Level 2, it
should be possible. But what kind of directory, if not Level 2? Perhaps just
the root one.
Section 10 Open and Close
The standard QL channel OPEN commands are redefined by Toolkit II
to use the data directory. In addition, Toolkit II provides a set
of functions for opening files either using a specified channel
number (as in the standard QL commands), or they will find and
return a vacant channel number. The functions also allow filing
system errors to be intercepted and processed by SuperBASIC
programs.
Commands
OPEN #channel, name open a file for read/write
OPEN_IN #channel, name open a file for input only
OPEN_NEW #channel, name open a new file
OPEN_OVER #channel, name open a new file, if it
exists it is overwritten
OPEN_DIR #channel, name open a directory
CLOSE #channels close channels
The problem is related to the FTEST command trying to open a file rather
than a directory to verify its existance. In SMSQ/E a directory can be
opened as a file, but in QDOS I don't think it can. The correct way to
check for the validity of devices and directories would be to attempt to
open a directory, not a file (TRAP#2 with D0=1 and D3=4 rather than
D3=1).
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