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
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