Re: rtVAX300 .. adding an CPU Type..

[Gregg Levine <gregg.drwho8%gmail.com@localhost>]

On Fri, Jan 4, 2013 at 12:30 AM, Holm Tiffe <holm%freibergnet.de@localhost> 
wrote:
> 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:
>>
>>   http://www.neurotica.com/misc/rtVAX-300-1.jpg
>>   http://www.neurotica.com/misc/rtVAX-300-2.jpg
>>
>>                  -Dave
>>
>> --
>> Dave McGuire, AK4HZ
>> New Kensington, PA
>
> He Matt we already clarified this :-)
>
> http://www.tiffe.de/robotron/VAX/rtVAX300-internal-1.jpg
> http://www.tiffe.de/robotron/VAX/rtVAX300-internal-2.jpg
> http://www.tiffe.de/robotron/VAX/rtVAX300-internal-3.jpg
>
> ...the rtVAX has nothing todo with robotron at al..
>
> Regards,
>
> Holm
> --
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>

Hello!
What is three of? Your site tells me it is not at home.

Dave? Why are four yeti playing "scream and leap poker"? in your dining area?

-----
Gregg C Levine gregg.drwho8%gmail.com@localhost
"This signature fought the Time Wars, time and again."