(Self correcting email)- I think even the old MacPlus had HFS in ROM, if I
remember correctly the original Inside Macintosh Volume IV was mainly about
HFS, (with Vol V about the SE and II).

Regards

Roger
----------
>From: "Roger Brown" <rogerhb@xtra.co.nz>
>To: Bill Studenmund <wrstuden@nas.nasa.gov> , Hauke Fath
<hauke@Espresso.Rhein-Neckar.DE>
>Cc: wonko@entropy.tmok.com , Eric Damien Berna <eric@thiel.com> , NetBSD
Mac68k <port-mac68k@netbsd.org>
>Subject: Re: Mode32
>Date: Sun, Nov 14, 1999, 8:34 am
>

>Apparently the IIx, IIcx and SE/30 all used exactly the same ROMs with an
>extra kludge on the SE/30 to make it think the internal video was in a NuBus
>slot. If this is the case then the number of models really reduces to just
>the II and IIx.
>
>I would not suggest not going down the reprogramming the roms trick, not
>many people can blow roms.
>
>Somebody did propose mimicing how the 'System' file works, that sounds like
>a good really idea.
>
>I presume the II and IIx actually have the HFS code in the ROMs, (I know the
>MacPlus did not but that was still able to boot from an HFS volume).
>
>Do Macs boot by loading a boot/IPL record (apart from the driver) from a
>Volume or do they boot by using their HFS ROM code to read the system file?
>
>Regards
>
>Roger
>
>----------
>>From: Bill Studenmund <wrstuden@nas.nasa.gov>
>>To: Hauke Fath <hauke@Espresso.Rhein-Neckar.DE>
>>Cc: wonko@entropy.tmok.com, Eric Damien Berna <eric@thiel.com>, NetBSD
>Mac68k <port-mac68k@netbsd.org>
>>Subject: Re: Mode32
>>Date: Sun, Nov 14, 1999, 6:13 am
>>
>
>>On Sat, 13 Nov 1999, Hauke Fath wrote:
>>
>>> What would switching involve, other than setting up the MMU differently
>>> (which may be hard enough for the different machines)?
>>
>>I'm not really sure. I'm only now learning how the VM system works.
>>:-)
>>
>>Scott or Allen?
>>
>>Take care,
>>
>>Bill
>>