Re: OctoRAM Card Information Needed

[Rubywand <rubywand@swbell.net>]

Bryan Villados writes ...
> 
> Hi, guys!!!!
> 
> 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?
 ....

     Yes. Here is some info which was posted by David Empson:

>>

You can use eight 1 megabyte SIMMs, but DMA compatibility might
be a problem.
 <....>

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 

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

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Rubywand