Re: [cc65] Need to pass drive number in addition to device number to cbm_opendir

On Sun, May 27, 2012 at 7:31 AM, Ullrich von Bassewitz <uz@musoftware.de>wrote:

>
> Hi!
>
> On Sun, May 27, 2012 at 01:26:36PM +0200, Oliver Schmidt wrote:
> >      What is wrong with assigning to _curunit?
> >
> >    I was about to answer the same when I noticed that the 'subject' made
> a
> >    distinction between "device" and "drive". So I thought he's asking for
> >    something special beyond my C64 skills...
>
> You are right, I should have had a closer look. The cbm functions ignore
> _curunit. It is used only for the POSIX functions.
>
> The argument called "device" in the call to cbm_opendir is actually the
> device
> address on the IEC bus, while it is not possible to specify a unit number
> for
> accessing dual floppy drives. The latter is specified in the file name, but
> the file name "$" is hardcoded within cbm_opendir, so it is not possible to
> access the second floppy of a dual floppy drive. Payton, is it this what
> you
> meant?
>
>
Yes, this is exactly what I was meaning.

However, another deficiency in the cbm_opendir method is the lack of
ability to apply a filter to the directory.  The drives have very
sophisticated pattern matching and it would be a shame to have to duplicate
that in code on the computer side.

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