36bit still in use ?
radioengr at gmail.com
Sun Nov 30 17:53:48 CST 2014
On 11/28/2014 8:44 AM, Pontus Pihlgren wrote:
> On Fri, Nov 28, 2014 at 04:26:09PM +0100, Jacob Dahl Pind wrote:
>> Unfortunately I do not have much details. I was at the Living
>> Computer Museum and talked with RIch Alderson, who used to work at
>> XKL. And he showed me a newer generation router from XKL, opened
>> up, at LCM. And they use a PDP-10 on a chip, and it was actually
>> running TOPS-20, and I could play around at the EXEC level in
>> </quote> >
> The system refered to above is visible next to the TOAD-1 in this video
> clip, arround 30 seconds in.
> I've know for a while that it's been a 36 bit machine under the hood but
> I was told that it is limited in some way, perhaps not a full pager. It
> would be fun to get some details. (And if you can get one for yourself
> of course).
Given that a PDP-10 only supports a virtual address space of 256 KW, and
that the XKL-2 reports 256MW of memory (another post), it's got to have
some kind of a pager. The KS10 only supported 1 MW of memory,
and the biggest KL-10 only supported 4 MW (I think) of memory.
You can find the "TOAD-1 System Architecture Reference Manual" online.
It describes the pager in detail. I doubt that the XKL-2 is much different.
The pager is incompatible with any DEC hardware. It would have to be to
support that much memory. I wouldn't call it 'limited'.
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