18 Sep
2018
18 Sep
'18
1:32 a.m.
I'll check my system tomorrow if I can. If you are using a DEC MS11-LB or
LD or compatible, you will need a DD11CK or DK backplane. If used in a
BA11-BF, you will Need DD11-CF or DF, which is the same as the CK/DK, but
with a longer wiring harness.
DEC made an "extension cable" to do this, but thew are not many around. Or
just replace it yourself.
Paul
On Tue, Sep 18, 2018 at 3:11 AM, P Gebhardt via cctalk <
cctalk at classiccmp.org> wrote:
MF11-L,
From: Henk Gooijen
As far as I know, the 11/40 uses only one H745.
Depends on what kind of memory it has. If MF11-L, it has two H745's; if
MM11-U, it has an H745 and an H754.
(The harness has two different connectors for the 5th 'brick', so it can
handle either kind. At least, that's the situation on the later machines
[serial numbers above 6000]; early production /40's only support the and you have to use special add-on harnesses to
support an MF11-U in them;
see DEC-11-H40SA-B-D, Chapter 6 for the details.)
As I don't have core memory modules available, I thought of using MS11
memory,
which, according to my research, seems to be an option for 11/40 systems.
The system manual states on page 6-7 that the base power configuration
consists
of two H745 regulators and that one may be swapped with a H754 in case
MF11-U
memory is used.
Does that mean that a single H745 regulator might be sufficient for my
needs?
All the best,
Pierre