Re: GS RAM ULTRA DRAMs

[waynes@intergate.ca (Wayne Stewart)]

Mark Cummings wrote 


> >
> >  You should try looking for 4bit x 1mb !!
> 
> That wouldn't work... or are two of the pins unused in the 256K chip. Even
> if that was the case the other pins would have to be tied to stop them
> floating.

Sorry, I didn't mean to suggest using the 4bit x 1mb. I meant if you
think finding 4 bit x 256k is hard you should try looking for 4bit x
1mb chips.

Actually the 4bit x 256k and the 4bit x 1mb have the same amount of
pins.
In the Ramfast the upgrade from 256 to 1mb cache is just swapping the
two
chips.  

 
> Well as I have a few of those AE Expander versions I'll try it out, thanks.
> I think the ones I have are for the IIe only, like the RamWorks series, so I
> may not have it. So far I've tried bit-banger with no luck, but then I think
> some of the chips are not 100% compatable. I've used the built in
> diagnostics with partial success, but I don't know if it checks RAM on the
> card. Anyone know ?

If you don't have it, let me know and I'll dig it up. 
I don't believe the built-in test will help you here. Another
possibility is
the memory test program that came with AppleWorksGS. However I prefere
using
an AE test program where possible as it has a graphic that shows which
chip
is bad

	Wayne