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NAME
    IsFileSystem -- returns whether a Dos handler is a filesystem (V36)

SYNOPSIS
    result = IsFileSystem(name)
    D0                     D1

    BOOL IsFileSystem(STRPTR)

FUNCTION
    Returns whether the device is a filesystem or not.  A filesystem
    supports seperate files storing information.  It may also support
    sub-directories, but is not required to.  If the filesystem doesn't
    support this new packet, IsFileSystem() will use Lock(":",...) as
    an indicator.

INPUTS
    name   - Name of device in question, with trailing ':'.

RESULT
    result - Flag to indicate if device is a file system

SEE ALSO
    Lock()