7 Jan
2002
7 Jan
'02
12:37 p.m.
It seems to work. I tried 772410, and it returned 000000. With
772414 it returned 006200. Is there a way to look at the what is being
transferred into memory?
I'm starting to think that my problem stems the lack of the
ADV11-C module that it wants. The program goes into simulation mode if "a
hardware port is missing" which I assume to mean one of the interfaces it
uses, a DRV11, a DRV11-B, and an ADV11-C. Since I don't need the
funtionality provided by the ADV11-C (and the fact that I can't find one),
I didn't install it. I suppose it could also be the DRV11, but I assume
the address is still at default, because the board doesn't appear to have
been modified. Although if you know the default, it would be nice to
double check.
Thanks,
Tom
On Mon, 7 Jan 2002, Pete Turnbull wrote:
If you know its address, try to access the CSR from
ODT. For example, if
the CSR is at 772410 (which is the default) then if you type that address
at the ODT prompt, followed by a '/' (without the quotes), you should see
the contents of the CSR. If there's nothing at that address, trying to
read it will cause a bus timeout, and all you'll get is a question mark and
a new prompt.
Also, can anyone point me to a document that
gives a good overview
of the LSI-11 bus, so that I can understand what I'm doing when I change
these settings (such as base and vector settings)?
Probably the Microcomputer and Memories Handbook 1982 is your best bet, as
it covers the 11/23, LSI-11 and 11/2, various memory boards (including your
MSV11-D and MSV11-L), and has sections on the processors, architecture, and
so on. You sometimes see them on EBay. I think that was the last (or
2nd-last) QBus CPU/memory handbook. There are at least one or two earlier
editions that would have the same general infomation, but not the specific
bits about 11/23 and contemporary memory, or 22-bit operation.
There's a companion volume, PDP-11 Microcomputer Interfaces 1983-84, which
you'd find useful. It has all the information about the BA11-M/N/S
backplanes and many peripherals, including your DRV11-B.
Apart from that, have you looked at the Micronotes at
http://www.ibiblio.org/pub/academic/computer-science/history/pdp-11/hardwar…
?
--
Pete Peter Turnbull
Network Manager
University of York