1 Jan
2013
1 Jan
'13
1:23 p.m.
On 2013-01-01 19:00, Dave McGuire<mcguire at neurotica.com> wrote:
On 12/31/2012 04:39 PM, Rob Jarratt wrote:
Since my name was mentioned...
There are plenty of differences. Virtual terminals for one. Which also
means that only M+ have batch queues. Named directories. Logical names.
Variable send/receive. Secondary pool. Split I/D space support.
Supervisor mode libraries. Accounting. Online reconfiguration. Mixed
massbuses (probably not that big win today, when people run simulators
anyway). Memory is managed slightly differently. I think that only M+
have disk shadowing and disk caching (also perhaps less used in emulated
systems).
Lots of tasks end up having more memory available in M+, which means
they can handle more data, or have more capabilities. This also affects
things like SYSGEN, which in M+ is rather more user friendly.
There are probably more things, if I think some more. But this gives a
fair idea. M+ is basically more.
> >> Straight 11M (non-plus) does.
(fits in 10 actually) Early RSTS/E, like
>v8,
> >>should, but not 10 and likely not 9. RT11 does.
>
>BitSavers looks like it has 11M 4.0 in a 19MB virtual tape, here:
>http://bitsavers.informatik.uni-stuttgart.de/bits/DEC/pdp11/magtapes/rsx11m/
>Assuming that is the right one to go for?
>
>I know next to nothing about RSX, what is the difference between plus and
>non-plus?
Oh jeeze, lots of stuff...I'm quite drunk at the moment, but
I seem to
recall..named directories being a biggie. Johnny (if he's montoring)
can expound. I ran 11M (non-plus) on an 11/34 for many years.
Rock solid, fast,
very nice OS.
Agree. 11M is fine. It's just that if you can run M+, I'd recommend it.
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.)
Johnny