Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uwm.edu!zaphod.mps.ohio-state.edu!rpi!mvk
From: mvk@aix01.aix.rpi.edu (Michael V. Kent)
Newsgroups: comp.sys.apple2
Subject: OctoRAM and DMA
Message-ID: <_#kg-7l@rpi.edu>
Date: 15 Apr 91 22:17:53 GMT
Organization: Rensselaer Polytechnic Institute, Troy NY
Lines: 45
Nntp-Posting-Host: aix01srv.aix.rpi.edu

I've just ordered the OctoRAM memory expansion card for the IIGS from Digital
Data Express.  My conversation with the saleswoman raised a few questions in
my mind about DMA, but I bought one anyway.

1) I know that only the first 4 banks of SIMMs on the card are DMA compatible,
but the saleswoman stated that the card would be inoperable if more than 4
SIMMs were installed with an Apple DMA SCSI.  Since I have such a beast, I
am wondering -- is this true?

2) I was also told that the RAMFast SCSI controller would work with all 8
SIMMs, but only 4 would be DMA (which is what I expected).  What does RAMFast
do that Apple doesn't?

3) What's the current price of a RAMFast, and what does the ROM 2.0 upgrade
do for me if I buy one?  I currently have a Chinook CT100 and plan to add a
ZIP GS, if that matters.

4) Can my Apple DMA SCSI go in slot 3 without disabling anything important?
I'm kind of running out of slots.  My system:

Apple IIGS ROM 01

slot 0 - Apple 1 Meg card (soon to be OctoRAM)
     1 - ImageWriter Iwc (Super Serial card)
     2 - 19.2 kbaud modem (modem port)
     3 - empty
     4 - SuperSonic stereo / digitizng card
     5 - Apple Drive 3.5 (SmartPort)
     6 - Apple Disk ][ (Disk ][ controller card)
     7 - Apple DMA SCSI card

HyperStudio digitizing card connected to A/D converter

I've got a LocalTalk connected to the printer port.

AppleTalk is currently inactive (I'm trying to activate it, but I'm not sure
what slot to move my SCSI card to).

Any ideas?
                                               Mike
-- 
Michael Kent                                  mvk@itsgw.rpi.edu
McDonnell Douglas                             Rensselaer Polytechnic Institute
St. Louis, Missouri                           Troy, New York
                               Apple II Forever!