Re: Two questions for all of you diehard Apple II fans.

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

David Empson <dempson@actrix.gen.nz> wrote:

> Mark Piazza <piazza@servtech.com> wrote:
> 
> > OK, the first question: Is there such a memory card for the IIgs that allows
> > one to use standard SIMM type memory chips?
> 
> 8-bit (30-pin) SIMMs are supported by at least two cards: the MDIdeas
> OctoRAM (I have one of these in my ROM 1 IIgs), and one version of a
> card sold by Quality Computers, which was also sold by a third party.  I
> forget its name.
> 
> The OctoRAM supports one, two, four or eight SIMMs, all of which must be
> the same size (256KB or 1MB).  With eight SIMMs installed, it is not DMA
> compatible.
> 
> The other card supports one, two or four 1MB SIMMs.
> 
> As far as the SIMMs go: parity is irrelevant, the SIMMs must support
> RAS-before-CAS refresh, and some hybrid types may not work.  The speed
> should be 120 ns or faster.  The safest bet is to use SIMMs that are
> known to work in a Mac Plus or SE.

Minor correction: I meant "CAS-before-RAS" refresh!  (Thanks Mitchell!)

I should also have added the Sirius card from Alltech Electronics, which
is still being sold new.

-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand