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- Path: sparky!uunet!mcsun!sunic!ugle.unit.no!nuug!fredrik.atari.no!jornmoe
- From: jornmoe@fredrik.atari.no (Joern Moe)
- Newsgroups: comp.sys.atari.st
- Message-ID: <H.b1m8_poL6Fk@fredrik.atari.no>
- Organization: Atari Corp. Scand. AB (Norway)
- Subject: Re: Atari ST with 60Mhz 68040 on the Atari Messe
- References: <tiemann.714777478@tardis61> <l9lhjkINN8i1@aludra.usc.edu>
- <H.4oWNqRisp5g@fredrik.atari.no> <laais8INNga6@aludra.usc.edu>
- Reply-To: jornmoe@fredrik.atari.no
- X-Software: HERMES GUS 1.03 Rev. Apr 14 1992
- Date: Thu, 03 Sep 1992 22:53:34 MET
- Lines: 29
-
- In <laais8INNga6@aludra.usc.edu>, Juxtaposer writes:
- >In article <H.4oWNqRisp5g@fredrik.atari.no> jornmoe@fredrik.atari.no writes:
- >[stuff deleted]
- >>The 68040 do have an internal clock doubler, although Motorola does'nt make
- >>such a big fuzz about it. But using the Intel terminology in advertisment, the
- >>68040/33Mhz would be a 68040/66Mhz (DXII) processor! I guess this is what the
- >>maker of this 68040 ST enhancement project has done....
- >
- > Actually, this is kind of backwards. Every Intel chip <486 and every
- >Motorolla chip <'040 ('030?) use clock dividers. The '486 and the '040
- >actually use the external clock for their internal logic. Intel DX2 chips
- >use an external clock that is twice the speed at which it communicates with
- >its external lines (Address, data, BACK, etc.), and thus the rest of the
- >system runs at 1/2 of the processors speed. I believe the '386 uses a
- >2:1 divider.
- >
-
- This I have to check out a bit before I can accept:-) In some way it makes
- sence, but in other it doesn't!
-
- I remember to have read that you could replace a 486DX with a 486DX2 and gain
- som real increase in performance, without changing the clock frequency in the
- machin!?!?
-
- --
- _______________________________________________________
- / Joern F. Moe / All above is my own personal opinion! \
- / Oslo, Norway / Any lack of opinion above is also mine! \
- -----------------------------------------------------------
-