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From: imp@marvin.Solbourne.COM (Warner Losh)
Newsgroups: comp.sys.dec.micro
Subject: Re: comp.sys.dec
Keywords: file archives, DRYCAS, memory boards
Message-ID: <1990Nov13.181259.20418@Solbourne.COM>
Date: 13 Nov 90 18:12:59 GMT
References: <2893@naucse.cse.nau.edu> <32744@netnews.upenn.edu>
Sender: news@Solbourne.COM
Organization: Solbourne Computer, Inc.
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In article <32744@netnews.upenn.edu> theall@rm105serve.sas.upenn.edu writes:
>   I'm not much of a hardware person, but I believe there were two
>types of memory cards manufactured by DEC - one for Rainbow 100As, the
>other for 100Bs. Other than that, the only difference in cards would be
>in the capacity of the memory chips used (64 or 256K).

The cards for the 100B can be populated with either 64K or 256K chips.
Once you make the change, all you need to do is set the dip switches
on the card correctly to use the extra memory.  Memory cards for the
100A didn't have this feature.  I do seem to recall an adapter card
that would allow the 100B memory cards to be used in a 100A, but since
I don't have a 100A, I didn't remember it very well....

Warner
--
Warner Losh		imp@Solbourne.COM
How does someone declare moral bankruptcy?