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Re: rtVAX300 .. need help..
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.
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