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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!usc!news.service.uci.edu!ucivax!ofa123!Aric.Caley
- From: Aric.Caley@ofa123.fidonet.org
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: A1200 - 68020EC ??
- X-Sender: newtout 0.02 Nov 17 1992
- Message-ID: <n1159t@ofa123.fidonet.org>
- Date: 12 Dec 92 12:12:08
- Lines: 55
-
- > Organization: Brock University, St. Catharines Ontario
- > From: tmc@spartan.ac.BrockU.CA (Tim Ciceran)
- > Message-ID: <1992Dec11.171145.13055@spartan.ac.brocku.ca>
- > Newsgroups: comp.sys.amiga.hardware
- >
- > In article <1992Dec11.093004.10703@walter.cray.com> walterb@sequoia.cray.com
- > (Walter Boese Jr.) writes:
- >
- > >What does the 'EC' in 68020 mean for the Amiga A1200.
- >
- > No MMU.
-
- Nope.
-
- > >How can you economize (sp) a chip that is pretty basic to begin with?
- >
- > Take out the MMU.
-
- What MMU?
-
- > >What great features can you remove?
- >
- > The MMU?
-
- Try again.
-
- > >And if they did remove something, WHY? The 68020 is getting outdated
- > >already, why degrade more than its age already has?
- >
- > Expense. The EC020 is quite suitable for an entry-level machine and
- > most people will not be inclined to run Unix or virtual memory on
- > such a machine. The alternative is another 68000. Don't give them any
- > ideas :).
-
- Right.
-
- Oh, by the way, the EC020 is lacking a 32 bit memory address range. It has
- only 24 address lines, and is thus limited to a 16 megabyte memory map.
- So, you can basicly have the same amount of ram that an A500 can have
- (well, 2 megs of chip instead of just 1 on the stock A500). It may be
- lacking some other things, as well. It also comes in a very small package,
- and is surface mounted to reduce costs.
-
- The 020 never had an MMU built in - you're thinking of the 030 (and the
- EC030, which IS lacking the MMU). But of course, you KNEW that, didn't ya?
-
- :)
-
- -Dances With Coyotes - World's slowest programer-Given that God is infinate-
- -AKA Dances V2.0, Coyote, Critter, Magnet, Major-and that the universe is-
- -- Former Net-Lurker - YES, an AMIGA godammit! --also infinate, would you-
- --- Still limping along with AmigaOS 1.3 :( ---like a toasted tea cake?-
-
-
- --- Maximus 2.00
-