Note
that
if processor
board
keyboard electronics
and
a remote terminal are
both
present in
a system,
they
will
both
be
enabled. Similarly, if accessory
card
key
board
electronics
and
a
remote console are
both
present in a systerIl,
they
will
both
be
enabled: provided no processor
board
keyboard electronics are present.
Keyboard
electronics on
an
accessory
card
will never
be
enabled when
the
processor
board
has keyboard electronics.
When more
than
one set of accessory
card
keyboard electronics
is
present,
then
only one
with
the
lowest select code
is
enabled.
If
several
HP
98700s exist on a system,
then
it
is
the
user's
responsibility
to
ensure
that
the
accessory
card
keyboard electronics associated with
the
HP
98700 display controller
at
the
address 56000016 has
the
lowest select code of all accessory
card
keyboard electronics in
the
system.
This
must
be
done
to
ensure
that
the
keyboard associated
with
HP
98700 "A"
is
not
input
console while
the
display of
HP
98700 "B" is
output
console.
The
Boot
ROM does
not
attempt
to
verify
the
display/keyboard
relationship.
If
no
output
device
is
present,
but
a keyboard is present,
then
that
keyboard will still
act
as
the
console
input
device. Similarly, if no
input
device is present,
but
a video
output
is
present,
then
that
video
output
will still
act
as
the
console
output
device.
If
neither
an
input
device
nor
an
output
device is present,
the
Boot ROM will go
ahead
and
automatically
Boot
the
default
operating
systems as long as no errors are discovered
during
self
test.
Refer
to
the
section on
Self-Test for more details.
Remote
terminals as consoles are discussed in more detail in
the
next
section.
80
Boot
Ronl Functions
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