Once in Configure Mode, several
options
are displayed.
One
of
the
option
keys
must
be
pressed
within
approximately
5
minutes
of entering Configure Mode. Otherwise,
the
Boot
ROM
will
time-out
and
start
power-up over again. Available
options
are:
• Force Long
~1enlOry
Test
• Continuous Self-Test
• 50 Hz
CRT
• 60 Hz
CRT
Regardless of
the
option
chosen~
most of
the
self-test will
be
repeated.
If
the
memory
test
has
already been
completed
and
the
extended
self-test
option
is chosen,
then
the
main
memory
test
portion
of
the
self-test will
be
repeated, otherwise it will not.
Force
Long
Memory
Test
If
the
m key is pressed,
the
self-test will
be
started
over
and
the
long memory
test
will
be
executed. Long
meIYlOry
test
is a
marching/walking
ones
and
zeros
test
taking
about
1 second
per
64K
of RAM.
Otherwise,
the
default
short
memory
test
will
be
executed.
The
short
memory
test
is
an
ad-
dress/address
complenlent
test
taking
about
1 second
per
256K
of
RAM.
Continuous
Self-Test
Pressing
IT]
causes
the
Boot
ROM
to
continuously
repeat
the
self-test
portion
of
its code.
This
is a toggle switch, so
entering
Configure Mode while already in
Continuous
Self-Test Mode,
and
choosing
the
"L" option, will
stop
the
continuous self-test
and
cause
the
Boot
ROM
to
continue
nOfInal
operation.
While in
Continuous
Self-Test Mode,
the
Boot
ROM will
not
wait, beep
or
stop
for
most
failures,
but
will
just
continue looping
through
self-test. However,
the
following failures will
stop
self-test
looping:
• A
CPU
register
failure:
In
this
case
the
Boot
ROlVI
stops
with
the
display blanked
and
the
value 8116 on
the
LEDs.
•
Memory
failure in
the
top
16K bytes:
In
this
case
the
Boot
ROlVI
stops
with
the
display blanked
and
the
value 8416
on
the
LEDs.
If
a
non-bit-mapped
video
board
and
monitor
is connected,
the
message
NEED
GOOD
RAM
ABOVE
FFCOOO
will
be
displayed on
that
monitor.
•
Boot
ROM
checksum failure:
In
this
case
the
Boot
ROM
stops
with
the
message
CONTINUE
AT
OWN
RISK
(Press
RETURN
To
Continue)
on
the
display,
the
value 8316
and
then
beeps four low tones
and
two high
tones. Pressing
I Return I will cause
the
Boot
ROM
to
continue self-test looping.
Boot
Rom Functions
75
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