Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!cs.utexas.edu!uunet!tut.cis.ohio-state.edu!giza.cis.ohio-state.edu
From: erd@giza.cis.ohio-state.edu (Ethan R Dicks)
Newsgroups: comp.sys.amiga.hardware
Subject: Question about the difference between A3000-16/50 and A3000-25/50
Keywords: A3000 speed
Message-ID: <116684@tut.cis.ohio-state.edu>
Date: 4 May 91 23:43:53 GMT
Sender: news@tut.cis.ohio-state.edu
Organization: Ohio State Computer Science
Lines: 26

I am considering upgrading from an A1000 to an A3000.  I would like to stay
cheap and get an A3000-16/50 through the "Power Up" program.  I intend to
add an '040 board, when they are available, but I am concerned about the
bus speed.  Is the 68040 co-processor slot synchronized with the motherboard
clock?  I realize that the CHIP RAM operates at a 14.xx Mhz to be NTSC
compatible and that the processor is asynchronous with respect to it, but
what about a co-processor?  I know that the co-processor on the A2000 is
synchronized when accessing motherboard/Zorro II RAM but it has local 32 bit
memory.

In short: if I buy a 3000-16/50, will any future '040 run at a higher speed?
If I intend to run a 25 Mhz '040, will I need an A3000-25/50?  I am aware of
RAM speeds and can select any FAST RAM to be of the appropriate speed for
either 16 or 25 Mhz.

Thanks,
-ethan




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