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Re: rtVAX300 .. adding an CPU Type..
Dave McGuire wrote:
> On 01/03/2013 06:06 PM, Matt Thomas wrote:
> >> As some of you already know I'm fiddeling around with an ISA Board
> >> in a PC that has an rtVAX 300 CPU on it.
> > The primary difference between the rtVAX and normal VAX is that the
> > rtVAX requires the process page table pointers (and, hence, page
> > table) to use physical address rather than system addresses.
> > This means all the process page tables have to be physically
> > contiguous (as opposed to virtually contiguous). Given the rapid
> > fragmentation of physical memory, this makes new process creation
> > difficult since there will rarely be enough physically contiguous
> > memory available for the new process' page tables.
> Not the rtVAX-300. The -300 is a little module with a bog-standard
> CVAX chip, an SGEC, and some flash chips for a bootstrap on it.
> Here's one, socketed, on a 6U VME board:
> Dave McGuire, AK4HZ
> New Kensington, PA
He Matt we already clarified this :-)
...the rtVAX has nothing todo with robotron at al..
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