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From: bja20850@uxa.cso.uiuc.edu (B.J. Anderson)
Newsgroups: comp.sys.amiga.emulations
Subject: Re: Mac-system 7.0
Message-ID: <1991Jun6.225211.28761@ux1.cso.uiuc.edu>
Date: 6 Jun 91 22:52:11 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> <1991Jun5.194728.11652@sagpd1>
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monty@sagpd1 writes:

>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

While we're on the subject... anyone mind nailing down the reasons that the
Mega Midget can go for so much less than the GVP series stuff?

-Beej

--
I must remember to be cheerful and obedient.
I must remember to be cheerful and obedient.
I must remember to be cheerful and obedient.
mail: anderson@mrcnext.cso.uiuc.edu