Re: ramfast-ramkeeper-transwarp combo question

["Henry S. Courbis" <apl2research(a.t.)comcast.net>]

Hello Mark.

>BTW, The post from CVA states "The Transwarp GS was not designed in
>strict accordance with the processor it replaces....and prohibits the
>new DMA circuit from putting valid bank latch data into the memory
>expansion product...Therefore, if you have a TWGS you will not be able
>to DMA above four meg....The Zip GS does not have this design flaw". -
>So no DMA with my layout. I just don't know if this should worry me.

The only issue I know about with the TWGS and the boards you mentioned is 
with the RAMFast SCSI.  Check this out: 
http://www.downloads.reactivemicro.com/Public/Apple%20II%20Items/Hardware/TransWarp_GS/TransWarp%20GS%20GAL%20and%20Oscillator%20Upgrade.doc

It mentions on the bottom of the third page:

"The 2B GAL was a DMA fix Applied Engineering issued for the board. It is an 
absolute requirement for TransWarp GS to work with at least some RamFAST 
SCSI boards (e.g. the revision C boards).  The RamFAST revision D does not 
require the 2B GAL.  The Apple II High Speed SCSI Card works with all 
TransWarp GS units."

So I think that will answer you question.  You may want to read that entire 
Gide for other issues/features you may have questions about.


-- 
Henry S. Courbis
www.ReactiveMicro.com
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