Path: utzoo!utgpu!water!watmath!clyde!rutgers!ukma!psuvm.bitnet!r38
From: R38@PSUVM.BITNET (aka Marc Rifkin)
Newsgroups: comp.sys.amiga
Subject: Re: 68000 speed up kits
Message-ID: <32328R38@PSUVM>
Date: 8 Feb 88 01:23:42 GMT
References: <6861@agate.BERKELEY.EDU> <3823@cbterra.ATT.COM>
Distribution: na
Organization: The Pennsylvania State University - Computation Center
Lines: 28

I have thought of this before and can so far construe this:
 A '20 board has to overcome 2 problems:
  1. Speed - the rest of the computer (coprocessors, etc) runs at 7.16, so
    '20 would have to slow down to deal with them, but it can act about
    twice as fast on the the memory, BUT:
  2. Memory - the '20 is 32-bit; the Amiga is physically (by nature of
    its PCB) 16 bit (in terms of its busses), so the '20 needs support
    circuitry to access such memory, and can only take advantage of
    its speed in 32-bit memory (equals $$).
 The 68000 or even a 16Mhz 68010 would only have to deal with the speed
problem in which case it could directly access the Amiga's internal
memory at its speed, possibly inbetween 7.16 cycles.  I am not too
knowledgeable about the logistics of this, which is why I have asked
a professional engineer about this who could even help into the
actual production stage.
I will hear from him soon and will report...
Later,
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