Re: AE GS Ram+

["Tim in Town" <timf@rmi.net>]

Joseph Lee <nugundam@netcom.com> wrote in article
<nugundamEBt7G0.D0K@netcom.com>...
> Nathan Mates (nathan@visi.com) wrote:
> :    Try comp.sys.apple2.marketplace and try to pick up a used one of
> : these, but they're probably quite rare nowadays as AE is out of
> : business.  I'd personally recommend against going over 4MB on the
> : GS-RAM+ board as you lose DMA abilities from any HD card, which in my
> 
> Doesn't the GS-Ram+ cards go to 6MB and then the 2MB piggyback pushes it
to
> 8 MB?  I've got a GS-RAM+ with 6MB on it.  Still got DMA on on the
RamFAST.
> -- 
> Joseph nugundam@netcom.com /===\=IIGS=/===\=Playstation=/===\=Civic
HX=/===\
> 

"Piggyback -- If someday you discover that you need even more memory, you
can attach an optional 2 Megabyte "piggyback" expander card to boost the
total memory expansion for the GS-RAM up to 3.5 Megabytes, up to 8
Megabytes for the GS-RAM Plus, and up to 6 Megabytes for the GS-RAM Ultra."

"A GS-RAM Ultra with a 2 meg Expander as well as the GS-RAM Plus are DMA
compatible for up to 4 Meg and partially compatible above that.  However,
with the optional DMA Support Card, your GS-RAM Plus (Rev D or later) or
GS-RAM Ultra will make all of the memory DMA compatible. . . .  You'll know
that you have DMA compatible GS-RAM Plus if it has a 34-pin DMA connector
toward the right edge of the front side of the board."

(GS-RAM User's Manual, Introduction p. iii-iv.)

My GS-RAM Plus (hate all those capitals!) is loaded (6MB) and it does have
the 34-pin connector described above.  If anybody knows where anything
about this 'DMA Support Card', please let me know.

Nathan, could you explain about losing DMA abilities with HD cards; how/why
does this happen, and is it only with the GS-RAM cards?  Thanks.


-- 
in Town,
Tim