On Fri, 2 Feb 1996, Patrick Phalen wrote:

> >>     The cpu has XC68040HRC25M printed on top along with a smaller block
> >                    ^^^^^   ^^
> >Obviously, it's a 68040/25MHz.  A Full '040.  The EC040's (XC or MC68EC040)
> >had a disabled or nonexistant MMU, and the LC040's (XC of MC68LC040) had
> >a disabled or nonexistant FPU (Floating Point Unit... Aka the Math
> >Coprocessor).
> 
> Okay, now I'M confused. Following is a quote from a review (May 1993) in
> comp.sys.amiga.reviews of the Progressive Peripherals Inc. Mercury 68040
> accelerator for the Amiga 3000:
> 
> ------------
>   "The 68040 supplied was not a production chip, but was designated
>   'XC68EC040RC25'.  Contrary to my first angry conclusion, this chip DOES
>   have a full 68040 with MMU and FPU inside, but it has the less advanced
>   bus system of the 68EC040.  Also, the "XC" designation means it has at
>   least one minor bug (in the design), and is therefore only for prototyping
>   purposes.  I have, however, had no problems with it, and it performs in
>   every way like a full MC68040."
> ------------
> 
> I'm looking for an accelerator for my 16MHz A3000 which hopefully can
> accept 4MB of SIMMs which I already have. This card would seem to do that,
> except for the question about the MMU.

The A3640 is a 25MHz 68040 CPU card for the 3000 and 4000 machines.  It 
does not accept SIMMs on board.

> 
> Is my thinking correct? I have the 16MHz A3000 with 2M Chip and 2M Fast and
> I have the 4M SIMMS with nothing to plug them in. Rather than pay a premium
> for rare 1x4 Zips, wouldn't it make more sense to buy an accelerator with
> room for the SIMMs?

Feel free to toss me a few 4MB SIMMs. :-) I need them for my 4000.  Can't 
do any rendering in 6MB :-(...

> 
> 
> 
>                  />
>                 /<        Patrick Phalen <> pphalen@crl.com
>   [\\\\\\(O):::<======================================================-
>                 \<           http://www.crl.com/~pphalen
>                  \>
> 
> 
> 
> 

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