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- Path: rohcs1.uhc.com!usenet
- From: michael rye <1726@topcity.mn.org>
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: 80 MIPS with Blizzard1260?
- Date: 22 Feb 1996 17:31:43 GMT
- Organization: Born Information Services Group
- Message-ID: <4gi99v$3o3b@rohcs1.uhc.com>
- References: <kluebke.14.824124623@mi.uni-koeln.de> <734.6617T840T985@Th0r.foo.bar> <Pine.SOL.3.91.960220174550.22498B-100000@sirius>
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-
- Alcock <cs1be@sirius> wrote:
-
- >-- On 13 Feb 1996, Kjell Gudim wrote:
- KG> >>sure but I think it is only 80ns or even slower.
- KG> >>Will I get 80 MIPS if I get 60ns RAM?
- KG> >No, it's just that SysInfo somehow gets it wrong with the 060.
- KG> >The same thing was reported by several magazines when the Cyberstorm
- KG> >first came out. Just get a better performance checker (I'm sure there's
- KG> >one on the Aminet)...
- KG>
- KG> No matter what, 80ns RAM is to slow for a 060 system.
- KG> I use 70 for my standard 040 system.
- KG>
-
- >I happen to be the proud owner of a Blizzard 1260 and I can tell you for
- >a fact it gets nowhere near 80MIPS. The manual says it can use 70ns or
- >faster RAM. I currently have a 60ns 8mb simm in it and I'm only just
- >exceeding 38 Mips with kickstart remapping and all the goodies on.
-
- >Regards, Barry.
-
- Barry,
- That number actually sounds like it's coming from the SysInfo program.
- If it is, then you are correct. That *is* approximately the right value
- that you should get. But, remember, SysInfo does not support testing the
- '060 chip. If I remember correctly, Amiga Computing U.S. Edition had some
- ads on the back cover of the magazine that reported the A1260 board would
- do 39.1 MIPs or something like that. So you are pretty close. In any case,
- who really cares about MIPs anyway (rhetorical question) as long as the
- friggen thing goes really, really fast! hehehehe
-
- As a side note, I'm looking at documentation direct from Motorola right
- now. Executing 2 instructions per clock cycle, at 50 MHz the chip will
- do 100 MIPs internally. But, executing 2 instructions per clock is not
- always achievable, so the actual value will be slightly lower on average.
-
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