Re: [stack] Concatenative Hardware

Christopher Diggins <[email protected]> wrote:
>>for some time: Could you build a machine with
>>capability-based addressing? That is, instead
>>of building an MMU (not that you said you were
>>going to) could you protect a process' memory
>>from other processes with capabilities?

>Yes I could do that, but I am currently studying
>minimalist system architectures.

Then you'll certainly want to study Capability based security. A
capability is a pointer without which it is impossible to access a
given object.

Very powerful, very simple. Shapiro (KeyKOS, EROS, Coyotos) has
written a lot about it online. The paper
http://citeseer.ist.psu.edu/689826.html was useful to me.

The Baker model I pointed to would make Capabilities very simple to
build; it would be entirely impossible (not merely improbable) to
access a data structure which isn't linked to from something already
given to you.

> Would there be commercial interest in this line
> of exploration? Right
> about now some kind of financial sponsorship
> would be very motivating. ;-)

Grin.

I don't know, but I doubt it.

Unless maybe you can convince Chuck Moore that your work would go
perfectly on his SeaForth24 chip. He's got plenty of money now that
Intel and AMD are paying him royalties on his patents.

> - Christopher

-Billy