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Newsgroups: comp.sys.apple2
Path: news.weeg.uiowa.edu!news.uiowa.edu!hobbes.physics.uiowa.edu!zaphod.mps.ohio-state.edu!cs.utexas.edu!uunet!munnari.oz.au!comp.vuw.ac.nz!actrix!David.Empson
From: David.Empson@bbs.actrix.gen.nz
Subject: Re: OctoRAM Memory upgrade
Organization: Actrix Information Exchange
Date: Sun, 17 Jan 1993 13:28:02 GMT
Message-ID: <1993Jan17.132802.18052@actrix.gen.nz>
References: <1993Jan12.022552.27758@nuscc.nus.sg>
Sender: David.Empson@actrix.gen.nz (David Empson)
Lines: 65
In article <1993Jan12.022552.27758@nuscc.nus.sg> ltchean@iss.nus.sg (Lim Thye Chean) writes:
>
> Hi, any OctoRAM users out there?
Yep. :-)
> I lost my OctoRAM manual, so I have to ask this in InterNet:
>
> I am now using 2MB on my RAM card, all 8 rows filled with 256K simms. I plan
> to upgrade to at least 4MB.
>
> 1. Can I upgrade to more than 4MB?
Yes. You can use eight 1 megabyte SIMMs, but DMA compatibility might
be a problem.
> 2. Do I have to throw away all 8 rows of 256K simms and used all 1MB simms?
Yes.
> 3. Can I mixed both simms? For example, reserved 6 rows of 256K simms
> (6 x 256K = 1.5MB), and used 2 rows of 1MB simms to get a total of
> 3.5MB? Or reserved 4 rows of 256K simms (4 x 256K = 1MB) and used 4
> rows of 1MB simms to get 5MB?
No. All SIMMs must be the same type.
> 4. Can I have the dip-switch configuration?
In the following diagrams, L means 'jumper to the left' and R means
'jumper to the right', and the jumpers are listed top to bottom.
Using 256k SIMMs:
1 (256k) L, L, L, L, L
2 (512k) L, L, L, R, L
4 (1 MB) L, L, L, R, R
8 (2 MB) R, L, L, R, R (This should be your current setting)
Using 1 MB SIMMs:
1 (1 MB) L, R, R, L, L
2 (2 MB) L, R, R, R, L
4 (4 MB) L, R, R, R, R
8 (8 MB) R, R, R, R, R
> 5. What precautions should I take?
When buying the SIMMs, make sure you get ones that will work on a Mac
Plus, SE, or II.
IBM SIMMs (9 way) should also work, but I've heard of some people who
have had problems.
If you're installing less than 8, make sure you put them in the correct
slots. The first SIMM goes in the top of the group of two slots, the
second below that, then fill the group of six slots from the top.
The only valid combinations are 1, 2, 4 or 8 SIMMs.
--
David Empson
Internet: David.Empson@bbs.actrix.gen.nz EMPSON_D@kosmos.wcc.govt.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand
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From: blakjak@panix.com (Noah Mittman)
Newsgroups: comp.sys.apple2
Subject: Re: need OctoRam manual
Date: 27 Feb 1994 19:38:17 -0500
Organization: School of Visual Arts: Video Junkies
Lines: 42
Message-ID: <2kredp$4eq@panix.com>
References: <CLwMww.Au4@cuug.ab.ca>
NNTP-Posting-Host: panix.com
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Richard Murray 235-4680 (xint@cuug.ab.ca) screamed from comp.sys.apple2:
: As the heading implies I am searching for instructions on how to set my
: OctoRam cards jumpers to accept 1 meg SIMMS. Any help would be Appreciated.
The following are the jumper positions for the 1Meg SIMM configurations:
- [ ] means jumper over middle and right pins
[ ] - means the opposite
=========================
[ ] -
- [ ]
- [ ]
[ ] -
[ ] - FOR 1 MEG
[ ] -
- [ ]
- [ ]
- [ ]
[ ] - FOR 2 MEG
[ ] -
- [ ]
- [ ]
- [ ]
- [ ] FOR 4 MEG
- [ ]
- [ ]
- [ ]
- [ ]
- [ ] FOR 8 MEG
--
b l a c k J A C k
Internet blakjak@panix.com FVNet #3@#53 original score by Wierzbowski
written and directed by Noah Mittman produced by SVA & digitalTarget video
"She's dead. She's alive. It's a little confusing."-Alek COMING THESIS '95