Re: Apple II accelerator card.

[iigs@wam.umd.edu (Geoff Weiss)]

In article <DD6p2A.2Bp@actrix.gen.nz>,
David Empson <dempson@atlantis.actrix.gen.nz> wrote:
>In article <BpLjKPb.tdon@delphi.com>, Tom O'Neill  <tdon@delphi.com> wrote:
>> Hmmm! When I poewered up my CV Tech board with an additional 2 Meg, making
>> 3Meg on the board and a 4th Meg on the poiggybacked Apple Ram board on
>> my ROM 1 IIGS, I had to turn off the DMA on my Apple High Speed SCSI Card
>> in order to get it to work prioperly...
>
>Not surprising.  The CVTech RAM card is not DMA compatible (except
>with a RAMFast, which uses special techniques to do DMA to any IIgs
>memory card).
>
>The CVTech card _might_ be DMA compatible (with an Apple HS SCSI card)
>if you remove the piggybacked card.  I'm not sure, though.  Anyone else?

Hmm, I have the piggy-backed CVTech Ram card (called the GS Memory Board
in the documentation).  Page 1 of the documentation says it is fully
DMA compatible under all circumstances.  I have a 4 meg Quality Computers
board piggy-backed on the CVTech board which has only 1 meg on it so the
total is 5 megs.  I have a RAMFast, not a Apple SCSI.  I don't know what
all this means, but maybe my two cents will help.

Geoff
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