From: Johnny
Billquist
I need to see if I can locate the manual in the
summer when I get close
to where I had that 11/34
That would be wonderful, if you find it! In addition to showing for sure how
it basically worked, I still also have a number of questions as to exactly
how it connected up to the optional cache, EUB memory, etc.
we still seem to talk about two different ENABLE
products, though... :-)
I saying what I'm about to say, I am not in any way trying to be
argumentative (truly, I would be as happy if you were correct, just as much
as if I were, _provided that we had found out what the correct answer really
is_), but I really do think that your memory is playing tricks on you, with
the 'it didn't require any software changes at all'.
The "Enable/34" described in contemporary posts here:
http://gopher.quux.org:70/Archives/usenet-a-news/FA.unix-wizards/81.07.09_u…
http://gopher.quux.org:70/Archives/usenet-a-news/FA.unix-wizards/81.07.12_u…
works the way I'm describing... (Although note I do think Mike made some
mistakes in the diagram in the first one - I think the DMA devices have to be
behind the ENABLE/34, per his description in the second post of how it works.)
I wish we could find a copy of the paper mentioned there ("Modifications to
UNIX to Allow Four Mega Bytes of Main Memory on a 11/40 Class Processor" by
Clement T. Cole and Sterling J. Huxley), as it might also answer the questions
I have...
Noel. All I can say is that I did a number of RSX SYSGENs on that 11/34,
and it truly looked just like an 11/24 from a software point of view.
I wish I had some more details at hand, but all I have are my
recollections (but anyone who have done an RSX-11M SYSGEN or three knows
that you do not forget them lightly).
I'm hoping that Update (the computer club) still have the documentation
around. I know we had the manuals when I played with the machine in the
early 90s.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol