Bob,

Sorry for the delayed reply...  I have two of those boards in 
an MVII, and they worked just fine.  I bought the pair of them 
on E-bay.  I still haven't run across any documentation, and 
posted a similar question here about 2 years ago.

Doug


On Sun, 9 Mar 2003 Robertdkeys@aol.com wrote:

> In digging through my ram board bits, I ran across a board
> that seems to be an 8mb ram board for a KA630, but, I do
> not see a listing for it in the field guide.  It is a National
> Semiconductor NS638 board, with no other markings on
> it.  It has some sort of two position toggle switch on the
> top edge but I don't know what it does or how to set it, if
> needed.  Any info or insights as to what this board actually
> is, is kindly appreciated.
> 
> Thanks
> 
> Bob Keys
>