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From: Brad Boyer <flar@allandria.com>
To: Laurent Vivier <Laurent@lvivier.info>
Cc: Finn Thain <fthain@telegraphics.com.au>,
	Joshua Juran <jjuran@gmail.com>, Riccardo <riccardo@kaffe.org>,
	geert@linux-m68k.org, linux-m68k@vger.kernel.org
Subject: Re: [PATCH] Add SWIM floppy support for m68k Macs.
Date: Wed, 5 Nov 2008 20:09:23 -0800	[thread overview]
Message-ID: <20081106040923.GA17813@cynthia.pants.nu> (raw)
In-Reply-To: <8E70C812-7878-494E-A2D8-66BB7402A74E@lvivier.info>

On Wed, Nov 05, 2008 at 03:32:13PM +0100, Laurent Vivier wrote:
> The SWIM chip can act like an IWM one and there is a procedure to know  
> in which mode it is.

That is good to know. Hopefully that can also be used to detect which
chip it is, possibly by checking for a mode change failure.

> If we suppose the SWIM chip on MacII is at the same address than the  
> IWM one, we should be able to use this procedure to know if it is an  
> IWM or a SWIM.

It would have to be the same address, since the address decoding logic
is part of the bus interface circuits on 68k macs. Each IO chip just
has a chip select and a few address lines based on what I've seen.

	Brad Boyer
	flar@allandria.com


  reply	other threads:[~2008-11-06  4:10 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-11-01  9:43 [PATCH] Add SWIM floppy support for m68k Macs Laurent
2008-11-01 18:10 ` Brad Boyer
2008-11-02  0:29   ` Finn Thain
2008-11-02  5:23     ` Brad Boyer
2008-11-02 12:02   ` Laurent Vivier
2008-11-04 18:34     ` Riccardo
2008-11-04 20:06       ` Brad Boyer
2008-11-05  0:58         ` Riccardo
2008-11-05  2:28           ` Brad Boyer
2008-11-05 21:43             ` Riccardo
2008-11-06  4:18               ` Brad Boyer
2008-11-05  6:58           ` Finn Thain
2008-11-05 21:45             ` Riccardo
2008-11-05  7:37         ` Joshua Juran
2008-11-05 10:31           ` Finn Thain
2008-11-05 12:20             ` Joshua Juran
2008-11-05 13:10               ` Finn Thain
2008-11-05 14:32                 ` Laurent Vivier
2008-11-06  4:09                   ` Brad Boyer [this message]
2008-11-02  6:00 ` Finn Thain
2008-11-02 11:59   ` Laurent Vivier
2008-11-02  8:54 ` Geert Uytterhoeven
2008-11-02 11:21   ` Laurent Vivier
2008-11-02 21:28     ` Brad Boyer
2008-11-03  0:14       ` Finn Thain
2008-11-03 18:58         ` Laurent Vivier
2008-11-09 16:16         ` Geert Uytterhoeven
2008-11-09 21:47           ` Laurent Vivier
2008-11-09 23:05           ` Michael Schmitz
2008-11-10  0:15           ` Finn Thain
2008-11-11  8:52             ` Geert Uytterhoeven
2008-11-11  9:43               ` Finn Thain
2008-11-11 10:21                 ` Geert Uytterhoeven

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