Re: 256K RAM Chips

["Will Strutts" <wrstrutts1@nospam.home.com>]

"Mark Cummings" <figjams@primus.com.au> wrote in message
news:3c07480c_2@news.iprimus.com.au...
> Rob,
>
> >I should first learn how to count. I didn't realize it when I grabbed
> >the card at the computer thrift, but these chips have 20 legs instead of
> >16. Worst of all, the guy there said he had just tossed a bunch of
> >AT-class memory cards filled with 256K chips.
>
> I would check out the pinouts to make sure they are compatable. If you
post
> the full part nos of both your existing DRAMs on the ZRAM board and the AT
> DRAMs so someone can check. I have a 2" thick book on Memory chip pinouts
> which I normally use for that purpose. Having said that though I have
found
> DRAMs myself on PC RAM cards that were suitable for Apple IIe and GS RAM
> cards.
>
> >These chips end with -80, so I assume that means 80ns rather than 800.
>
> Yes they would be 80ns, I don't think any DRAMs were ever made as slow as
> 800ns. 200ns or 250ns is about the slowest I've ever heard of.
>
> Mark

I had read that the gold colored original RAM's on the Apple II
were rated at 400ns.

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

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

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