Newsgroups: comp.sys.apple2
Path: utzoo!utstat!philip
From: philip@utstat.uucp (Philip McDunnough)
Subject: Re: DMA detection
Message-ID: <1990Aug24.070958.20166@utstat.uucp>
Date: Fri, 24 Aug 90 07:09:58 GMT
Distribution: na
References: <1990Aug23.224445.3691@utstat.uucp> <1990Aug24.003638.9617@laguna.ccsf.caltech.edu> <1990Aug24.011911.10594@laguna.ccsf.caltech.edu>
Organization: Statistics, U. of Toronto

In article <1990Aug24.011911.10594@laguna.ccsf.caltech.edu> toddpw@tybalt.caltech.edu (Todd P. Whitesel) writes:
[List of DMA compatible cards and an explanation]
>
>In general, if your card's maximum capacity is four times its minimum (with the
>same given chip density) then it is almost definately DMA compatible.
>
>If it supports more (All of AE's cards do), then the additional expansion
>beyond four MAY OR MAY NOT be DMA compatible. 

You've got me confused. Are you saying any AE card with 4 or fewer megs will
be DMA compatible? I have one in a GS RAM+ card(which is supposed to be DMA
compatible- according to the AE guideleines). So that gives me 2.25 megs on
a ROM03. I am still leary, and not knowing why things are happening is rather
annoying.

This is usually the case when you start mixing and matching hardware from
different sources. I've had similar hassles whenever I've tried to use
non-Apple products with my Macs, and the same went for IBM etc...

We should not have to be buying non-Apple caching devices, memory cards,
etc...It getting to a breaking point and it won't be me that breaks!

Philip McDunnough
University of Toronto
philip@utstat.toronto.edu
[my opinions]