Re: [cc65] dio density detection

From: Shawn Jefferson <jefferson_shawn_a8bit1yahoo.com>
Date: 2005-02-17 08:41:39
--- Christian Groessler <chris@groessler.org> wrote:

> Does the buffer need to be set to $2EA? I know of
> http://www2.asw.cz/~kubecj/asio.htm as SIO reference
> and
> there is nothing mentioned about a specific buffer
> address
> for the $53 function.
> 
> I get the same results regardless whether I set the
> buffer
> to $2EA or something else.

I don't think it matters, but the buffer already
exists for this information at $2EA, so you wouldn't
have to take up 4 bytes of memory elsewhere.
 
> But it doesn't seem to work for me on a real machine
> :-(

I found the same thing.  Putting DCB.status ($303) =
0x40; into the code fixes it.  From what I understand
that sets the Read direction.  The emuluator doesn't
seem to be paying attention to it, but the real drive
does (as does APE.)  I read something somewhere that
the XF551 might give weird results... (?)

--
Shawn Jefferson


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Received on Thu Feb 17 08:41:43 2005

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