9 Jan
2013
9 Jan
'13
3:28 p.m.
On 01/09/2013 02:06 PM, David Riley wrote:
Nope...256KB or 128KW would be the max for a PDP-11 with 18-bit
addressing. RSX-11M can run with a good bit less than that.
For both: I was talking about 11M+! I ran 11M on a 256KB system
for quite a while until I acquired my 4MB memory board, so I'm
aware. :-)
Duh, of course. :) My mistake.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
> But it do
require much more of the hardware.
> It takes way more memory, and it requires certain features in the CPU,
> that 11M do not.
> 11M can be run on basically any PDP-11, as long as you have atleast
> about 56K of memory (Better with more, of course.)
What is the practical minimum for the machine to be able to use RSX-11M and RSX-11M+?
CPU-wise, I don't know, but you need a minimum of 512KB
(256KW) of RAM. Like I mentioned, it runs on an 11/23,
which has the EIS and 22-bit addressing. Obviously, you also need an MMU.
Also not true. You can generate an unmapped system, which will run
without an MMU. (sorry!)