Path: utzoo!utgpu!watserv1!ria!obelix!ptoper
From: ptoper@obelix (Andy Nagy)
Newsgroups: comp.sys.amiga.advocacy
Subject: Re: AMIGAstation...
Message-ID: <2352@ria.ccs.uwo.ca>
Date: 22 Feb 91 20:49:02 GMT
References: <19154@cbmvax.commodore.com> <19110@cbmvax.commodore.com> <1991Feb16.180604.10623@magnus.ircc.ohio-state.edu> <12013@helios.TAMU.EDU> <1991Feb12.053906.10441@magnus.ircc.ohio-state.edu> <1991Feb16.062147.24843@NCoast.ORG> <2290@ria.ccs.uwo.ca> <2311@ria.c
Sender: news@ria.ccs.uwo.ca
Reply-To: ptoper@obelix (Andy Nagy)
Lines: 50

In article <19154@cbmvax.commodore.com>, daveh@cbmvax.commodore.com
(Dave Haynie) writes:
> In article <2311@ria.ccs.uwo.ca> ptoper@obelix (Andy Nagy) writes:
> 
> >	In reference to the memory map you posted earlier:
> 
> >        When C-A comes out with the super-duper-whiz-bang custom chip
set (you
> >know the one with elevendy billion colours and forty million game ports (for
> >BLAZEMONGER, natch)) where does it go (in the memory map)?
> 
> Well, there are those places marked RESERVED.  [stuff deleted ...]

	I take this to mean that the details will not be fleshed out until later
when C-A actually starts to design a new chipset? (It's tempting to ask When,
How and What...)

> >        Also, just out of curiosity, what were the design decisions
you used 
> >to come up with this arrangement, ie were there any non-obvious
constraints, 
> >trade-offs etc?
> 
> The main tradeoff started out as, do we enforce our original 32 bit
addressing
> constraint by locating motherboard memory above 68000 space, or do we cut the
> folks who did it wrong yet another break.  Once we took in the possibility
> of 16MB rather than 4MB, though, there was no choice to make.  We had to have
> the extra space.  

	Huh?  I think I missed something here. (What do you mean by "did it wrong",
and 16MB vs 4MB ?)

	[more stuff deleted]

	Would you please explain again about having both the 68030 and the 68040
working concurrently would work.  I got the impression that it was only
a matter
of software for each processor to actually make this idea fly. Would it involve
a lot of ugly coding? (Sorry to ask again, but I was a little foggy about what
you were saying the first time.)

> Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests"
>    {uunet|pyramid|rutgers}!cbmvax!daveh      PLINK: hazy     BIX: hazy
> 	"What works for me might work for you"	-Jimmy Buffett

-------------------------------------------------------------------------------
Andy Nagy (ptoper@asterix.gaul.csd.uwo.ca)
The University of Western Ontario, London, Canada
 "Dee do do do, dee da da da, thats all I want to say to you" -- The Police