My recollection from an old hardware book is that the SE/30 had the same
ROMs as the IIx and IIcx, but built in video. The IIx and IIcx had NuBus
video cards so an extra bit of circuitry was added to the SE/30 to make the
built in video appear as a NuBus card so that the ROMs did not have to be
different. Does that help?

Roger Brown

----------
>From: Tom Rini <tmrini@ntplx.net>
>To: "Michael R. Zucca" <mrz5149@acm.org>
>Cc: paul@whooppee.com, port-mac68k@netbsd.org
>Subject: Re: duos (again)
>Date: Mon, Mar 29, 1999, 12:19 pm
>

>On Sun, 28 Mar 1999, Michael R. Zucca wrote:
>
>> At 9:09 PM -0500 3/26/99, Tom Rini wrote:
>> 
>> [nusk]
>>
>> I'm not sure what your question is.
>
>Wrong email I think..  Was about apple making the video seem like another
>nubus card.  If apple has done something like this before, have we worked
>around this before?  (I think it's a "no" and a "go play in macsbug")
>
>> >Since the last thing to be detected is the video, it could be
>> >that...
>> 
>> Since you claim that the ethernet was recognized, this is probably a reasonable
>> assumption since the ethernet driver will handle the network interrupts.
>> 
>> > I remember looking for a working kernel for this duo a while back
>> >and I thought I found a site w/ some support, then again it coulda been
>> >for pb support at all.  Is there some site for any sort of work done
>> >on/for duos? (I think I have some time to kill...)
>> 
>> This is pretty much a "roll your own" situation. Without the Dock or a Duo it's
>> hard to add support for it. However, if you check out www.macbsd.com you'll
>> find a page that will tell you how to browse the video driver assembly code
>> to see how the MacOS driver shuts off interrupts. If you figure that out you
>> could probably send that to the list and a kind soul might incorporate the
>> code into the kernel.
>
>*cracking nuckles* alright.  Thanks.
>
>---
>Tom Rini (TR1265)
>http://dobbstown.yeti.edu/
>
>