Re: Apple II accelerator card.

[jeremy@gate.globalx.net (Jeremy Rand)]

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?

  I have a CVTech card and it is fully compatible with my HS SCSI in
DMA mode.  I have installed the CVTech card with a Apple 1MB piggyback
installed (for a total of 4MB) as well as with the card maxed out and
no piggy back (also 4MB).

>> Suggestions?

>Change RAM card, or get a RAMFast.

  I would suggest checking the jumpers.  You said you put more memory
in so the jumpers would have to change.  According to my docs, the
jumpers should be set to:

    ABC
  2 o[]
  1 []o

  I hope you understand the diagram.  If that doesn't work, look at the
card for a revision number and I will see how it compares to mine.  Good
luck.

>-- 
>David Empson
>dempson@actrix.gen.nz
>Snail mail: P.O. Box 27-103, Wellington, New Zealand

-- 
Jeremy Rand            jeremy@globalx.net
Microsoft asks where do I want to go today.  My response is anywhere
but Chicago, Cairo or Daytona thanks.