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From: monty@sagpd1
Newsgroups: comp.sys.amiga.emulations
Subject: Re: Mac-system 7.0
Message-ID: <1991Jun5.194728.11652@sagpd1>
Date: 5 Jun 91 19:47:28 GMT
References: <4150@jethro.Corp.Sun.COM> <1991May22.090222.2054@bernina.ethz.ch> <471@regina.uregina.ca> <08069.AA08069@babylon.rmt.sub.org> <1101@sys.uea.ac.uk>
Reply-To: monty@sagpd1.UUCP (Monty Saine)
Organization: Scientific Atlanta, Government Products Div, San Diego, CA
Lines: 21

In article <1101@sys.uea.ac.uk> cmp9133@sys.uea.ac.uk (A.C. Lock) writes:
>rbabel@babylon.rmt.sub.org (Ralph Babel) writes:
>
>CSA are manufacturing cheap versions of their Mega Midget Racer cards which do
>not contain a MMU, which seems rather silly to me, since it means that memory
>access to chip ram is going to be slow since you won't be able to map this 
>memory using the MMU to 32 bit ram.
>
>Adam

    When The CSA people demoed these "cheap versions" of the midget racer
    at our users group about 3 months ago they made a point of stressing the
    fact that the hardware itself transfered the proms to 32 bit memory. 
    As for 32 bit access to chip ram I don't think this is possible on any
    16 bit Amiga. MMU or not you don't gain 32 bit access to chip ram unless
    you have a 32 bit chip bus. But then I have been wrong before :).

    They did say that is was simple to later remove the inhibited 68030 and
    install a regular 68030 at a later date.

    Monty Saine