7.
Boot
ROM
Checksum:
If
the
Boot
ROM
checksums successfully,
then
the
Boot
ROM version
(BOOTROM
Rev. A2)
is
displayed, otherwise
the
nlessage
BOOTROM
Rev.
A2
Failed
will
be
displayed.
If
there
was a video circuit memory failure discovered in
the
alpha
display initialization
and
test
routine,
then
it will
be
shown on
the
display as:
Memory
Failed
at
<Hex-Address>
(W:<Hex-Write-Pattern>,
R:<Hex-Read-Pattern»
8.
Identify
Floating
Point
Hardware.
A search is
made
for
the
MC98881 Coprocessor.
It
is
identified
but
not
tested.
9.
Initialize,
and
Test
Keyboard
Electronics:
The
keyboard
human
interface vectors
are
set
up
for
the
processor's keyboard electronics,
if present,
and
their
self-test value is checked.
If
the
keyboard electronics failed self-test,
then
Keyboard
Failed
is
displayed
and
the
appropriate
error
code is sent
to
the
LEOs
and
the
beeper.
If
the
processor's keyboard interface
is
present
and
passed self-test,
then
the
message
Keyboard
is
displayed.
If
no processor keyboard electronics are present,
then
the
external
I/O
space is searched for
accessory
card
keyboard electronics (for
the
HP
98700A).
If
found, it is
treated
the
same
as
the
processor keyboard electronics except
that
the
message
Keyboard
at
8 (where X
is
the
select code of
the
accessory
card
keyboard electronics) is displayed if
the
keyboard
passes self-test,
and
the
message
Console
Keyboard
at
XX
Failed
is
displayed if it fails
self-test.
NOTE
Note
that
only
the
I/O
card
keyboard electronics chosen as console
keyboard will
be
tested. Several seconds are required
to
identify
the
console keyboard.
Other
keyboard electronics in
I/O
slots will
be
iden-
tified,
but
not
tested.
10.
The
message
RESET
to
Power-Up
appears
on
the
last line
of
the
display.
11.
Drop
Interrupt
Level:
The
interrupt
level is
dropped
to
zero.
12. Pre-load Memory:
The
message
LOADING
MEMORY
appears
on
the
last line of
the
display while
the
end
of
memory
is
found by pre-loading
the
RAM
not
currently
in use by
the
Boot
ROM code.
If
a long
test
is
to
be
done,
the
RAM
is
loaded
with
EEEE
111116.
If
the
fast
test
is
to
be
done, each RAM location
is
loaded
with
its own address.
When
pre-loading
is
finished,
the
message SELF-TEST
MODE
is displayed
on
the
last line
of
the
display.
Then,
a 300
InS
delay
is
executed
to
catch
refresh failures.
136
Boot
ROM
Functions
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