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- Path: sparky!uunet!munnari.oz.au!bruce.cs.monash.edu.au!monu6!vaxc.cc.monash.edu.au!bull
- From: bull@vaxc.cc.monash.edu.au
- Newsgroups: comp.sys.amiga.misc
- Subject: Re: Betting on an A1800
- Message-ID: <1992Nov20.130757.90654@vaxc.cc.monash.edu.au>
- Date: 20 Nov 92 13:07:57 +1100
- References: <1992Nov19.134614.58859@qut.edu.au>
- Organization: Computer Centre, Monash University, Australia
- Lines: 86
-
- barham@qut.edu.au writes:
- > No flames this, just my opinion...
- >
- > unregistered@newcastle.ac.uk (I.A. Inman) writes:
- >> Just guesswork this, but Commodore seem to have left room for a
- >> machine between the A1200, and the forthcoming A1500/2000
- >> replacement.
- >
- > I think it is probably unlikely. The A4000 will be coming out with
- > an '030 version. What's the point of anything between the A1200's
- > '020 and that?
- >
- >> My guess is that at some point, probably next year, a new low cost
- >> machine (probably called the A1800) will appear at around the 500 -
- >> 700 pound price mark.
- >
- > Why "probably called the A1800"? Do you have inside information?
-
- Numeric progression. A600, A1200, A1800. I agree with Tim
- though, it doesn't make sense. There are now 2 low cost console
- machines in the Amiga range and 2 upper end machines with slots.
-
- >> It will probably have a 68030 processor, as opposed to the 68020
- >> processor in the A1200. To justify the price, a hard drive will
- >> probably be included, along with an HD drive.
- >
- > As I said, there will be an '030 version of the A4000. I kinda look
- > at it as - A4000/040 replaces A3000, A4000/030 replaces A2000, A1200
- > replaces A500 and A600 sits down the bottom all alone. I know the
- > A4000 is a little beyond the A3000/A2000, but we are a fair ways down
- > the track from then, hey...
-
- Well...., your assessment of which new machine replaces which
- old machine is up for debate. CBM-USA has apparently said that they
- will continue to sell the A2000, so the US has a range of 5 machines.
-
- >> It makes sense, as this ground (in Britain anyway) is covered by
- >> the Atari Falcon, and the A1200 is not up to competing with this
- >> machine. A low cost 68030 Amiga would.
-
- The only way an 030 Amiga could compete with a Falcon on
- price is to design it as a console like the A600 and A1200. I see no
- sense in this idea.
-
- > In what ways doesn't a 1200 compete with a Falcon? Sound - true. An
- > A1800 will be no different here to the A1200. DSP - true. Again no
- > difference between A1800 and A1200. Speed - A1200 architecture
- > compared to Falcon architecture means that, with some fast mem, the
- > A1200 should "blow away" the Falcon. Graphics - heh, not a lot needs
- > to be said about comparing AGA graphics to Falcon graphics. What I
- > am saying is, the A1200 competes very favourably with the Falcon - a
- > "low cost" '030 wouldn't compete in a better way as it is likely to be
- > more expensive (even if it is "low cost").
-
- Complete agreement on this point. I have reservations about an
- A1200 being able to "blow away" a Falcon though. Provided the A1200 has
- 32 bit FAST ram, the area where an A1200 will be faster is when performing
- high bandwidth graphics (high-res, high-speed animation). When running
- low bandwidth graphics, the Falcon should have the edge.
-
- As I understand it, the 030 and the blitter in the Falcon are
- running off the same memory bus 100% of the time. On an A1200, the 020
- and the custom chips only share the same bus when the 020 wants to use
- CHIP ram. When the 020 uses FAST ram, it uses a bus that the custom chips
- don't have access to. In a high bandwidth video situation, the Falcon
- blitter will be constantly hitting the common bus it shares with the 030.
- In the same situation on an A1200, the custom chips and the 020 stay on
- their seperate busses. Even when the 020 needs to use CHIP ram, the bus
- arbitration guarrantees the 020 regular access to the CHIP ram bus without
- significantly degrading the performance of the custom chips.
-
- The reason why I think the Falcon will be faster in a low
- bandwidth video mode is because the blitter will not be doing much,
- providing pleanty of idle time on the bus for the 030 (which runs at a
- higher clock speed to the A1200's 020 and has better caching facilities).
-
- >> And such a machine would help against the increasing PC competition
- >> (over here at least).
- >
- > The A1200 stacks up pretty good against your 386sx SVGA home machine.
- > The A4000/040 and /030 machines stack up pretty good against higher
- > level machine. What else do we need?
-
- Bull@vaxc.cc.monash.edu.au OR bull@monu1.cc.monash.oz
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