Re: GS RAM card question

[dempson@atlantis.actrix.gen.nz (David Empson)]

In article <xRDmkA8.roffe@delphi.com>, Alberto Roffe  <roffe@delphi.com> wrote:
>  
> Sometime ago, I ordered an Apple IIGS and a 4 Meg Ram Card. I haven't
> received the IIGS yet, but I did already get the RAM Card. According to the
> label printed in the card itself, this is a Q-RAM GS Rev. 2. In the
> receipt it says it is a "GS Super Ram W/4 Meg (Simm)". I assume that's the
> same thing. It seems to be from Sequential Systems.

They are NOT the same thing.  Quality sold two different RAM cards.
The original was a "Q-RAM" (or "Q-RAM GS").  It uses SIMMS, and
supports 1, 2 or 4 MB.  The later card was called a "Q-RAM GS 2",
and it used a different type of memory chip (the picture I have here
looks like ZIL).  My user group's IIgs has one of the former type, and
I think I've seen one of the latter.

The original Q RAM GS was supplied with a four page manual (one sheet
of paper, folded) and a disk containing diagnostic software.  I don't
know about the later card.

What sort of memory chips does the card contain?

> Also, it has 2 dip switches. Switch 1 is on and switch 2 is off. What is the
> purpose of these switches?

They are probably used to set the memory size.  With the original
Q-RAM GS (SIMM-based), both should be OFF for 1 MB, SW-1 ON and SW-2
OFF for 2 MB, both ON for 4 MB.

I don't know how they should be set for a Q-RAM GS 2.
-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand