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Re: How to test if your memory card is DMA compatible?

Subject: Re: How to test if your memory card is DMA compatible?
From: "Michael J. Mahon" <mjmahon@aol.com>
Date: Fri, 08 Jun 2007 15:32:57 -0700
In-reply-to: <null-6575BB.15013308062007@comcast.dca.giganews.com>
Newsgroups: comp.sys.apple2
References: <1181003471.616493.123480@n4g2000hsb.googlegroups.com> <46658803.7434.usenet_csa2@a2central.com> <1181068905.940577.19800@p77g2000hsh.googlegroups.com> <EpOdnbD59YpHFPTbnZ2dnUVZ_riknZ2d@comcast.com> <null-6575BB.15013308062007@comcast.dca.giganews.com>
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Greg Buchner wrote:

In article <EpOdnbD59YpHFPTbnZ2dnUVZ_riknZ2d@comcast.com>,
 "Henry" <apl2research(.a.t.)comcast.net> wrote:
From what I can tell, and the IIgs Hardware Reference isn't that specific,the FPI controller on the IIgs Motherboard is the issues with 8 Megs andDMA. It seems that when Apple designed the FPI they really never accountedfor more then 4 Megs of RAM. Why they would 'cripple' the IIgs like this Ihave no idea. It really seems like a bad design. Maybe someone can shedsome more light on this for me?
99.99% certainty that it was because the Mac Plus could only do 4MB.


That sounds right.  ;-(

-michael

NadaNet file server for Apple II computers!
Home page:  http://members.aol.com/MJMahon/

"The wastebasket is our most important design
tool--and it's seriously underused."

References:
- Re: How to test if your memory card is DMA compatible?
  - From: SteveMalecheker@gmail.com
- Re: How to test if your memory card is DMA compatible?
  - From: "Sean Fahey" <sean.fahey@a2central.com.remove-l8q-this>
- Re: How to test if your memory card is DMA compatible?
  - From: "AMart79196@gmail.com" <AMart79196@gmail.com>
- Re: How to test if your memory card is DMA compatible?
  - From: "Henry" <apl2research(.a.t.)comcast.net>
- Re: How to test if your memory card is DMA compatible?
  - From: Greg Buchner <null@none.invalid>

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