Subject: RE: Sonnet Presto
To: '' <>
From: Dan Willson <Dan.Willson@VPUADV.UAB.EDU>
List: port-mac68k
Date: 07/12/2002 14:29:10
Hmmm ... if memory mapping is the issue, why not try IIsi RAM-Muncher to
prevent Mac OS from using that particular bank of memory (it's for a IIsi,
but it is also mentioned on in reference to the IIci):

FWIW, another article on the IIci on LEM also references the IICi using the
first bank for video ("The IIci uses RAM for video, which it takes from the
first bank of memory on the motherboard."). Just thinking out loud, don't
mind me. <grin>


Daniel Willson
Web Content Coordinator
University of Alabama at Birmingham
UAB Media Relations
Telephone: (205) 975-2825
Facsimile: (205) 975-9458

> ----------
> From: 	Michael R. Zucca
> Sent: 	Friday, July 12, 2002 2:13 PM
> I recall that when I tried an 040 accelerator on a IIci some time ago it
> had problems. I think it might have something to do with the way the
> machine maps part of the DRAM for video memory for the internal video. I
> forget if using internal video instead of the video card made it go away,
> though. Anyway, give that a whirl.
> I think the problem stems from the fact that the way the DRAM is mapped
> for
> video changes when you put in an 040 accelerator and NetBSD can't deal
> with
> this condition. Also, when you don't use internal video, I think the
> machine changes the memory map and this may be different when running
> under
> the accelerator.
> >- Is there any hope in getting the Presto running?
> Possibly, but it would seem that NetBSD would have to know that it was
> booting a IIci with the accelerator and adjust the way it deals with video
> RAM or adjust its understanding of where stuff is mapped.