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Kurzweil K2000 - Calvin and Hobbes Test Details (v1.0)

Kurzweil K2000
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SECTION 4
DIAGS1_0.DOC
12113/92
4.21.13
Sine
Wave
Test
Executing
this
test
enables
generation
of
sine
waves
at
the
following
frequencies:
20
Hz,
315
Hz,
630
Hz,
945
Hz,
1260
Hz,
2 KHz, 4 KHz,
and
8 KHz.
The
sine
wave
at
20
Hz
is
generated
as
soon
as
the
test
is
initiated.
Pressing
any
button
on
the
front
panel
(or
turning
the
Alpha
Wheel
one
click
to
the
right)
will
generate
the
next-highest
frequency.
The
unit
will
return
to
the
diagnostic
test
menu
when
the
sine
wave
is
at
8
KHz
and any
front
panel
button
is
pressed
or
the
Alpha
Wheel
is
clicked
to
the
right.
This
test
is
intended
for
use
with
an
oscilloscope
connected
to
the
K2000's
audio
output,
and
enables
analysis
of
the
purity
of
the
sine
wave
generated.
If
the
sine
wave
is
impure,
a
problem
with
the
sound
engine
is
suggested.
To
monitor
the
Sine
wave
test,
connect
the
scope
to
any
of
the
B
outputs,
the
MIX
outputs,
or
the
Headphone
jack.
4.21.14
Sound
RCM
Test
This
memory
test
takes
about
five
seconds
to
run,
and
checks
the
data
integrity
of
the
K2000's
sound
ROM
(the
factory
sounds),
and
the
connections
between
the
sound
ROM
and
the
cpu.
The
test
is
a
simple
checksum
procedure
for
each
pair
of
Sound
ROM
chips.
Failures
are
indicated
as
data
or
address
failures,
as
described
in
the
overview.
The
display
indicates
the
success
or
failure
of
each
of
the
four
blocks
of
Sound
ROM
(A-D).
Each
block
corresponds
to
two
Sound
ROM
chips.
In
the
unlikely
event
of
a
failure,
the
engine
board
must
be
replaced,
since
the
Sound
ROM
chips
are
soldered
in
place.
4.21.15
Sound
RAM
Test
This
memory
test
checks
the
address
space
of
the
sample
RAM
(SIMMs).
The
purpose
of
this
test
is
to
determine
whether
the
K2000
recognizes
all
of
the
sample
RAM
that
has
been
installed.
The
more
RAM
that
has
been
installed,
the
longer
this
test
takes.
The
test
takes
approximately
20
seconds
for
each
Meqabyte
of
RAM.
The
K2000's
sample
RAM
space
is
divided
into
two
banks
(Bank
0
and
Bank
1),
representing
the
two
pairs
of
SIMM
sockets.
Each
bank
is
divided
arbitrarily
into
four
blocks
with
a
maximum
address
space
of
8Mb.
These
blocks,
A-D,
represent
internal
divisions
of
the
address
space;
and
do
not
correspond
to
any
physical
division
of
the
sample
RAM.
When
the
Sound
RAM
test
is
run,
the
display
will
indicate
which
block
in
which
bank
is
currently
being
tested.
This
is
shown
by
a
series
of
dots
that
appear
as
the
test
proceeds.
As
each
block
is
finished,
the
dots
are
replaced
with
either
a
success
message
(OK)
or
a
failure
message.
If
the
block
fails,
the
malfunctioning
address
is
indicated,
as
well
as
the
expected
checksum
value
and
the
observed
value.
See
Figure
4.18.
Each
of
the
eight
blocks
corresponds
to
8Mb
of
available
RAM.
The
number
and
size
of
the
SIMMs
installed
in
the
unit
determine
which
blocks
are
used.
For
example,
assume
two
pairs
of
4Mb
SIMMs
are
installed;
thus
4Mb
x
4,
or
16Mb
of
sample
RAM.
If
the
Sound
RAM
test
is
executed,
and
all
RAM
is
recognized,
the
display
will
show
"8.0M
Found"
in
Block
A
of
each
bank
when
the
test
finished.
38

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