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- Path: sparky!uunet!gatech!bloom-beacon!eru.mt.luth.se!lunic!sunic!aun.uninett.no!nuug!fredrik.atari.no!jornmoe
- From: jornmoe@fredrik.atari.no (Joern Moe)
- Newsgroups: comp.sys.atari.st
- Subject: Re: 68040 accelerator board?
- Message-ID: <H.NB0mn1ZPbEM@fredrik.atari.no>
- Date: 5 Sep 92 11:56:46 GMT
- References: <9209031931.AA15117@photon.magnus.acs.ohio-state.edu>
- <lafqubINN6fn@aludra.usc.edu>
- Reply-To: jornmoe@fredrik.atari.no
- Organization: Atari Corp. Scand. AB (Norway)
- Lines: 26
- X-Software: HERMES GUS 1.03 Rev. Apr 14 1992
-
- In <lafqubINN6fn@aludra.usc.edu>, Juxtaposer writes:
- >In article <9209031931.AA15117@photon.magnus.acs.ohio-state.edu> Your Conscience <dhbutler@magnus.acs.ohio-state.edu> writes:
- >>Hello!? I seem to have missed something very important! There seems to be some
- >>talk about a 68040 board or upgrade or hack that can be bought/built for the
- >>Atari ST?
- >
- > From the descriptions so far, it is a stand alone (a tower?) from
- >the main Mega ST (only so far) that houses a 66MHz 68040 (way over-driven
- >IMHO, put perhaps bearable if it has some INDUSTRIAL STRENGTH heat sinks
- >and one heck of a fan - maybe liquid cooled :). Perhaps more busses (I hope)
- >and memory. Supposedly runs at about 24MIPs. I wonder if it uses a cache
- >(outside of the onboard of the '040)? Would really Haul A** with a decent
- >(ie: 256k+) cache...
- >
- This make no sence! The 25Mhz version of the 040 does 20MIPS. If a cklock
- frequency more than two times higher only yields 25% increase, I'd be
- realy disapointed.
- No, the thing is that this processor actually runs at 33MHz, but it has a
- onboard clock-doubler wich make the internal clock 66MHz. This is the same
- trick as done on the Intel DXII processors!
-
- --
- _______________________________________________________
- / Joern F. Moe / All above is my own personal opinion! \
- / Oslo, Norway / Any lack of opinion above is also mine! \
- -----------------------------------------------------------
-