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CHAPTER l
SYSTEM CONFIGURATION
This chapter brifely describes switches, jumpers,
and
backplane
configuration.
For
more
information
see
Chapter
2
in
the
VAXstation I Technical Manual, EK-VS200·TM.
l.l
BACKPLANE
Figure l·l shows an example backplane installation for
a
system
configured
with
all
the
option
modules
listed in Table l·l.
Figure
1-2
shows
grant
continuity
chaining
and
interrupt
acknowledge
priority.
With
regard
to
the
backplane,
the
following should be observed:
o
The M7136 MCT (memory controller) module is installed in
slot 1.
o
The M7135-YA OAP (data path) module is installed in slot
2 •
o
Memory modules are installed adjacent to
the
M7135-YA;
that is, starting with slot
3.
o
It is recommended that the
DEQNA
be installed
ahead
of
(that is, in the lower-numbered slot) the VCBOl.
0
0
The
DEQNA
is a dual-height module and requires
Grant Continuity card in the
A
or C position of
slot.
As Figure l·l shows, the
DEQNA
occupies
position and the G7272 occupies the r position.
1-2, below, shows the Grant path).
a
G7272
the same
the
A/B
(Figure
The
RQDXl
Disk
Controller
is
installed
in
the
last
active
slot
in
the backplane.
For example, in a base
1-1
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