Subject: Re: Mac IIfx
To: Steven Campbell <campbel@istar.ca>
From: Bill Studenmund <wrstuden@loki.stanford.edu>
List: port-mac68k
Date: 03/21/1997 21:35:48
> 
> At 7:08 PM 3/21/97, John Valente wrote:
> >I'm just wondering if anyone's ever run Net BSD on a MacIIfx.  It was absent
> >from the list on www.macbsd.com/macbsd/macbsd-docs/machine-status.  I assume
> >there would be no problem, since all the other Mac II models seem to work fine,
> >but my old machine is some 200 miles away and I don't want to get it if it's
> >known that NetBSD will fail on it.
> 
> Welcome to the list.  The IIfx was a very unique machine when it was
> introduced.  It is the only non-Power Mac produced that has serial
> Input/Output processors and SCSI DMA, though the SCSI DMA only works under
> A/UX 2.0 and later. The Quadra 9X0 series also has problems supporting the
> serial IOPs, but the Q9X0 lacks the SCSI DMA, which makes the Q9X0s a
> little easier to support. As a result, the IIfx has some unusual hardware
> that looks after the SCSI controller and the serial ports.  And since Apple
> declined to document this funny hardware, getting support for this machine
> would is difficult, though not impossible.

One little note. I've been drooling over the CHRP/PPCP specs, and the power
macs don't have IOP's. At least not like the ones in the IIfx. For the serial
ports, they just use DMA. It's way cool. It's also in the 660AV and the 840AV.

Take care,

Bill