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Kurzweil K2000 - Calvin and Hobbes Test Details (v0.4)

Kurzweil K2000
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SECTION 4
DIAGSO_I.OOC
12/22/92
To
optimize
the
processing
speed,
the
K2000
performs
a
one-time
software
operation
when
powered
up
for
the
first
time.
The
memory
management
unit
(MMU)
in
the
gate
array
logic
chip
(GAL)
located
at
U35
on
the
engine
board
executes
a
"swap
bit"
function
which
makes
Block
0
of
the
CPU
responsible
for
the
PSRAM,
and
Block
1
responsible
for
the
Boot
EPROM
and
setup
EPROM.
Consequently
the
PSRAM
functions
are
processed
as
early
as
possible.
The
Swap
Bit
Test
checks
to
make
sure
that
the
swap
bit
function
has
taken
place.
The
swap
bit
function
also
involves
the
GALs
at
U10
and
U11.
If
the
test
fails,
check
the
traces
between
U10, U11,
and
U35.
If
they
appear
intact,
one
or
more
of
the
GALs
may
be
defective.
4.14.12
Calvin
and
Hobbes
Tests
IMPORTANT:
The
Calvin
and
Hobbes
tests-especially
tests
6
and
~are
not
100%
reliable
in
Version
0.4.
A
Failure
of
any
test
may
not
necessarily
indicate
a
component
failure.
If
a
failure
message
occurs,
run
the
Calvin
and
Hobbes
tests
three
or
four
more
times,
and
compare
the
results.
If
any
of
the
subsequent
tests
pass,
the
component
in
question
is
probably
good.
If
the
tests
fail
repeatedly,
the
component
in
question
is
probably-but
not
necessarily-bad.
If
failures
occur
with
any
of
the
Calvin
and
Hobbes
tests,
it
is
recommended
the
unit
be
upgraded
to
Version
1.2
Engine
software,
which
includes
Version
1.0
of
the
diagnostic
software.
The
Calvin
and
Hobbes
tests
in
Version
1.0
are
reliable.
The
13-step
Calvin
and
Hobbes
memory
test
checks
the
connections
between
the
CPU
and
the
three
VLSI
sound
engine
chips:
Calvin,
Hobbes
0,
and
Hobbes
1.
Calvin
handles
sample
fetching
tasks,
and
Hobbes
0
and
1
primarily
perform
wave
form
generation
and
DSP
functions.
Calvin
and
Hobbes
have
undergone
rigorous
testing
prior
to
mass
manufacturing,
and
are
extremely
unlikely
to
be
defective.
If
one
or
more
of
the
steps
in
this
test
indicate
a
failure,
the
problem
is
probably
to
be
found
in
the
connections
between
the
chips
and
the
CPU.
The
test
results
are
displayed
as
shown
in
Figure
6.
The
significance
of
failures
in
each
step
of
the
test
is
explained
below.
Steps
2.1-2.3
test
the
connections
to
the
internal
RAM
and
internal
registers
of
Calvin
and
Hobbes.
When
analyzing
the
results
of
these
tests,
the
result
should
be
a PASS
message
for
each
test.
The
hexadecimal
numbers
that
appear
on
the
display
are
irrelevant
as
long
as
they
match
for
each
test.
The
numbers
shown
in
figure
5.6
are
arbitrary,
and
may
differ
from
the
numbers
seen
in
the
unit
under
test.
This
does
not
indicate
a
problem.
If
any
of
the
tests
fail,
check
the
connections
between
the
components
in
question,
as
described
in
the
paragraphs
below.
If
test
#2
fails,
check
all
the
connections
between
the
CPU,
Calvin,
Hobbes
0,
and
Hobbes
1.
Note
that
expected
observed
values
are
not
given
on
the
line
indicating
the
status
of
test
#2.
Instead,
a PASS
or
FAIL
message
will
be
seen
for
each
of
the
three
steps
in
test
#2.
NOTE:
The
Calvin
and
Hobbes
tests
are
interrelated,
and
are
sequenced
from
the
least
significant
test
to
the
most
significant.
If
anyone
test
fails,
the
subsequent
tests
are
likely
to
fail
as
well.
In
this
case,
start
by
checking
the
components
related
to
the
first
test
that
failed.
If
a
malfunction
occurs,
repair
the
malfunction
and
run
the
Calvin
and
Hobbes
test
again.
It
is
likely
this
will
result
in
the
subsequent
tests
will
passing
when
retested.
18

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