Re: SIMMS for IIgs

["william strutts" <wrstrutts1@nospam.home.com>]

"Mitchell Spector" <a_specto@alcor.concordia.ca> wrote in message
3b64d49f.12476844@newsflash.concordia.ca">news:3b64d49f.12476844@newsflash.concordia.ca...
> "william strutts" <wrstrutts1@nospam.home.com> wrote:
>
> >Okay,
> >
> >This is getting frustrating.  I have two 1 meg simms from a Mac
> >Classic II which are of the two chip variety and they don't work
> >on my Q-RAM card.  Then I read that they need to be of the
> >eight chip variety.  Today, I found some OKI 120ns 8-chip simms
> >and put them in and they don't work either.  What gives?  What
> >exactly kind of SIMMs does the IIgs require?
>
>     Of existing IIgs memory cards that support SIMMs, they'd have to
> fall under this set of guidelines: Either 256K or 1MB SIMMs, 8 or 9
> chips on the PCB (meaning 1 bit chips--parity or non-parity), 30-pin
> (8-bit), and at least 150ns or faster. CAS before RAS refreshing may
> not be an issue, I've never heard of SIMMs which use the reverse
> order.
>
>     The other thing to watch for is the card's configuration. Often you
> have to set DIP switches or jumpers to tell the card which sockets
> are populated. If your not fully populating the card, you may have to
> plug them in a certain order. Finally most cards only accept one type
> of SIMM or the other (all 256K or all 1MB, not a mix).
>
> Mitchell Spector
> a_specto@alcor.concordia.ca

It has four simm slots and a dip switch which turns each bank
on or off.  They have to be installed in pairs I think.  I have
two megs of simms that came with the card and they work fine.
However, if I replace them with the new RAM, the machine
locks up on booting GS/OS.  The loading bar keeps moving
but the disk drive freezes.  I used a mix of the two types of
RAM in different banks and it won't load either.  I didn't try
putting all four of the new memory in and see if it works. It
is possible that one of them is bad.  I put the original memory
back in and it works fine.  The only difference I can see is
that the original RAM is taller and has gold contacts and the
new memory is low-profile and has silver contacts.  Would
this be a problem???

--
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William R. Strutts - wrstrutts1@nospam.home.com - Whatever!

C'est moi!  http://www.facelink.com/wrstrutts

Just hacking away...

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