On Thu, 7 Dec 2017, Clem Cole wrote:
Never got to
use the V7 shell; we were stuck with 11/40s[*]
Dave I don't understand this statement. We ran Seventh Edition on 11/40
class processors more than anything else. The issue was lack of separate
I/D space and the kernel got large so you ran out of physical memory. The
later was solved with things like the Able ENABLE, which I admit I put one
couple of 11/34 and our 11/60 (which are 11/40 class). But V7 ran fine on
it.
I tried, but no way it would work; the only non-DEC gear we ended up with
was extra memory (nothing special, but of course not covered by Field
Circus) and an Ampex[*] RP-03 clone (I think). For all intents and
porpoises it was a maxed-out 11/40 (then the /60 later on).
As I mentioned before, the AUSAM buffer scheme certainly helped, and we
kissed goodbye to deadlocks; we even modified character devices (LP. XY,
LV etc) to use the buffer pool instead of the character queues, and they
went damned fast.
I should mention that the /40s were originally specced to run RSX-11D
(yuck), and when the ACM article came out the rest was history...
[*]
My spell checker suggested "Tampax" for "Ampex"...
--
Dave Horsfall DTM (VK2KFU) "Those who don't understand security will
suffer."