Boot RXS

jim stephens jwsmail at
Mon Jan 1 22:30:19 CST 2018

On 1/1/2018 10:35 AM, Noel Chiappa via cctalk wrote:
>      > From: John Welch
>      > HALTED.
>      > Does anyone have any hints on how I can guess what I need to add?
> Well, Able made a thing called an 'Able ENABLE' which allowed use of more
> than 256KB of physical memory on any UNIBUS -11 with memory mapping hardware
> which wasn't an -11/70-44-24. That's probably what it's talking about.
I had a meeting with Ken Omohundro on 12/7 and will be having dinner 
with him again soon.  I'll ask him about it.  I know he doesn't have any 
records left, but I could take him your notes and see what he recalls.  
Also I can perhaps get engineer names and try to track them down.

I hope to get a biography and history of his companies including Able, 
and figure somewhere to get it stored.

> We had one on our -11/45 at MIT, BITD. So I have the programming spec for it,
> back-created from the source code for that machine. And Clem Cole was nice
> enough to follow up on an old message in an email list archive, and dig up
> some documentation and scan it in.
> I was planning on doing a page for it on the Computer History wiki, haven't
> got a round tuit yet, though.
> They are, AFAIK, complete unobtainium in physical form; I've been looking for
> years, never seen one.
> If someone wanted to upgrade SIMH to support it, we do know enough to do that.
> 	Noel

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