FINAL
TRIM
SIZE
:
7.0
in
x
8.5
in
B
VME
Ov
erview
(Models
747i/50
and
747i/100)
VME
(\V
ersa
Mo
dule
Euro card")
cards
use
a
VME
bus
proto
col
whic
h
allo ws
v
arious
kinds
of
micropro
cessors
to
comm
unicate
with
one
another.
The
proto
col
is
micropro
cessor
indep enden
t,
implemen
ts
a
reliable
mec
hanical
standard,
and
allo
ws
indep enden
t
v
endors
to
build
compatible
pro ducts.
One
feature
of
VME
is
that
m
ultiple
CPUs,
suc
h
as
the
Mo
del
742rt,
can
b e
congured
in
to
the
same
VME
bac
kplane.
Eac
h
one
functions
as
a
completely
separate
pro cessor,
but
they
all
m
ust
b e
able
to
access
address
space
that
may
or
may
not
exist
on
the
lo
cal
computer
b oard.
The
address
space
that
one
CPU
needs
to
access
may
b e
on
a
separate
memory
card
or
on
an
en
tirely
dieren
t
CPU
b oard.
The
VME
standard
allo ws
t
w
o
b oard
sizes:
Half
heigh
t
or
3U
b oards.
These
b oards
connect
to
the
VME
bac
kplane
utilizing
only
one
of
the
t
w
o
bac
kplane
connectors.
F
ull
heigh
t
or
6U
b oards.
These
b oards
connect
to
the
VME
bac
kplane
utilizing
b oth
of
the
bac
kplane
connectors.
3U
size
b oards
are
often
pro
vided
with
either
3U
size
or
6U
size
co
v
er
plates
allo wing
them
to
b e
placed
in
either
a
half
heigh
t
or
full
heigh
t
c
hassis.
The
Mo
del
747i/50
or
747i/100
pro
vides
six
full
heigh
t
VME
slots.
The
VME
System
Con
troller
o ccupies
slot
1
and
is
built
in
to
the
c
hassis,
leaving
slots
2
through
7
a
v
ailable
for
use.
In
the
b
ackplane,
slot
two
is
the
upp
ermost
slot
and
slot
7
is
at
the
b
ottom
.
The
v
endor
of
y
our
VME
card
should
ha
v
e
pro
vided
installation
conguration
settings
for
the
card,
for
y
our
particular
application.
These
usually
allo w
the
card
to
b e
installed
in
one
of
sev
eral
default
lo
cations.
B-2
VME
and
EISA
Accessory
Cards
DRAFT
2/5/97
11:31
