Re: rtVAX300 .. need help..

[Paul Koning <paulkoning%comcast.net@localhost>]

On Jan 10, 2013, at 4:33 PM, Rhialto wrote:

> On Thu 10 Jan 2013 at 04:29:36 +0100, Johnny Billquist wrote:
>> Just a few short comments. The VAX internal registers are not memory
>> mapped, ever. That would be against the architecture specification.
> 
> Well, the thought isn't that strange. Iirc, the PDP-11 has its CPU
> registers mapped (somewhere in high memory?) and the PDP-10 too (at
> address 0, iirc).

PDP-11 CPU internal registers appear in I/O address space, with some 
exceptions: the general registers are not visible there except in the 11/10.  
(They have listed addresses, but those only work from the console, not from 
programs, with that one exception.)  And yes, on the PDP-10, the general 
registers live at memory addresses 0 to 017.  

        paul