Re: GS RAM ULTRA DRAMs

["Mark Cummings" <NOTfigjams@primus.com.au>]

> 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.

I haven't even heard of those, so they must be scarce.

> 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.

They planned that well.

> 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.

AppleWorksGS has a memory test ??? :O I never realized.
I have to be able to boot the System first ! don't I ? And I can't at the
moment with 4MB onboard. 2MB seems OK. Thats why I think some of the chips
are not quite right. The Control Panel thinks it fine, but probably only
does a real basic check, like writing a bank number into it and reading it
back to verify the bank exists.

> However I prefere using
> an AE test program where possible as it has a graphic that shows which
> chip is bad

Yes that's what I like about my GS Juice Plus, I can boot the utility disk,
no GS/OS required, just P8, then you can see which chip is bad. That's how I
fixed my ROM-3 and I had another one chip die today in the GS Juice Plus.
Ran the diag, double check by moving the fault, then swap it out and re-run
the diag. Easy Peasy. :)
And I would _really_ like to get that test program for the GS RAM ULTRA. Any
chance of emailing it ?

Mark

remove NOT to email me.