
Apple II Computer Info
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### FILE : octoramgs
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### Created : Tuesday, August 31, 1999 Modified: Tuesday, August 31, 1999
### File Type: "TEXT" File Creator: "LMAN"
### File Size: 4817 bytes 4 KB
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Article 152103 of comp.sys.apple2:
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Newsgroups: comp.sys.apple2
Subject: Re: OctoRAM Card Information Needed
Date: Mon, 30 Aug 1999 16:02:27 -0700
Organization: Hewlett-Packard, Cupertino CA
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Bryan Villados wrote:
>
> I'm just now installing an MDIeas OctoRAM card with an OctoRAM ESP card.
>
> One difficulty I'm running into is upgrading the RAM on the OctoRAM
> card. I've installed eight 1MB 30-pin SIMMs (80ns each). The first bank
> and second bank are different makes, but they're both running at the
> same speed. When I boot my GS up, it only recognizes 4MB. I notice that
> there's a block of jumpers on the ram card, but I don't have the
> manuals for it. Is there some kind of jumper setting I need to set to
> have it recognize all 8MB?
This question was asked earlier this month, so I'll post the same reply
with improvements suggested by David Empson. (You need to display this
with a mono-spaced font.)
OctoRAM configuration jumpers
The OctoRAM can be loaded with either 256K or 1Meg SIMMs.
There can be 1, 2, 4, or 8 SIMMs loaded on the board.
Diagram A: shows the physical locations of the jumpers
in either the right or left positions for the five switches.
Examples: 1 256K SIMM has all switches jumpered to the left;
8 1M SIMMs have all switches jumpered to the right.
256K SIMMs: 1 2 4 8
Switch 1 xxx . xxx . xxx . . xxx
2 xxx . xxx . xxx . xxx .
Apple II Computer Technical Information : Apple II Family Hardware Info
ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 322 of 572
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