The
boot
selection menu displays all accessible
ass
as
the
Boot ROM locates them. An
as
is
selected by typing
the
one
to
three
character string (a single
letter
or
a 1
to
2-digit number
followed by a single letter) listed in
the
menu. Note
that
the
character
used
to
enter
Attended
Operation
Mode
is
considered
part
of
this
string.
As
the
keys are accepted
they
appear
in
the
lower right
hand
corner of
the
display. An example
menu screen is shown in Figure 4-6.
Copyright 1985,
Hewlett-Packard
Company.
All
Rights
Reserved.
BOOTROM
Rev.
A
MC68020
Processor
Bit
Mapped
Display
Keyboard
HP-IB
HP98620B
HP98644
at
2
HP98642
at
8
HP98626
at
9
HP98625
at
14
HP98629
at
20
HP98629
at
21
1572906 Bytes
:
REMOTE
, 21, 0, 8
2B
SYSTEM_BASIC
:
ROM
B B
A A
H H
F F
Z +
:
HP8290X,
706, 0
3B
SYSTEM_BAS
:
HP7908,
803, 0
1H
SYSTEM_HP-UX
:
REMOTE,
20, 0, 8
1F
SYSTEM_FORTRAN
2F
SYSTEM_FORTH
1Z
SYSTEM_4TH
1P
SYSTEM_PASCAL
1b
SYSburp
SEARCHING
FOR
A
SYSTEM
(Press
RETURN
To
Pause)
RESET
To
Power-Up
Figure 4-6.
Attended
Operation
Mode
Display Example.
1H
A ROM
as
is
selected by a number-letter entry.
If
the
user knows
that
a
particular
choice
is
desired, such as "2F"
or
"3IB",
then
the
user can
type
that
response as
the
computer
powers
up
to make a selection.
This
simple
human
interface makes
it
possible
to
make a selection
without
waiting for
the
display
to
show
what
ass
are available.
A
state
diagram
of how
the
Boot ROM
interprets
the
key sequence for selecting
an
as
is shown
in Table 4-4.
94
Boot Rom Functions
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