Remote
Human
Interface
Very early in
the
Power-Up Sequence, a search is
made
for one of
the
following interfaces with
its
"remote" switch set:
•
HP
98642
(4
port,
multiplexed RS-232),
•
HP
98626 RS-232 Interface
Card
•
HP
98644 RS-232 Interface
Card
The
search
starts
at
select code
()
and
ends
at
select code
31
or
when one of these remote
cards
is found
that
passes self-test.
If
one
is
found, it becomes
the
Remote
Human
Interface.
If
the
Remote
Human
Interface is
an
HP
98642 card,
the
the
terminal
on
port
1 will
be
used as
the
console. All
other
ports
are ignored by
the
Boot ROM.
NOTE
Note
that
the
98561-66511 processor
board
or
98561-66530
Human
In-
terface
Card
with
on-board
RS-232 interface is
treated
as
an
HP
98644
RS-232 interface
card
by
the
Boot
ROM.
To indicate
that
a remote
human
interface has been found (at, for example, select code 9),
the
first line of
the
internal display, if present, will display:
Remote
Interface
at
9
After
this
point
the
internal display will
not
change until a system
is
booted. Any internal
or
external
keyboard, if present, will work
just
as
it
would if
there
were no remote console (see
previous section for details).
To use
the
remote interface,
an
80 wide
terminal
with
at
least 24 lines
that
accepts
the
following
HP
standard
terminal
escape sequences
is
required:
Terminal Escape
Sequence
Escape
H Escape J
Escape
&aDDY
Escape
&aDDC
Display Activity
Clear Screen
and
reset cursor
Move
Cursor
to
Row D D
Move
Cursor
to
Column D D
Boot
Rom Functions
81
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