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ADD-one Manual
SECTION
7
7.
EXTENSIONS AND ACCESSORIES
7.1
installation Instructions
for
Retrofit Circuit Board PC-2
and
Sound Extensions EPSC
In
addition
to the
EPSC sound extenders each comprising four 256-bit
EPROMS, retrofit board PC-2
is
required
in
order
to
extend
the
sound
memory
of the
ADD-one.
It is
imperative that
the
EPROM's are plugged
in
on
a
non-conductive
working surface
(e.g.
rubber sponge).
CAUTION
I
Electrostatic charges may cause irreparable damage
to the
EPROM
'
Take the chip indexed
A
from
the
box and slightly bend the "legs" inwards
on
the
working surface. Applying only slight pressure, push
the
chip
into
the socket. Check that all the "legs" have been
inserted into
the base
and that none have been bent back
or to
the side.
Proceed
in
the same way
c
or
the chips
indexed
B,
C
and
D.
It
is
important that you fill
the
plug-in locations consecutively,
i.e.
chip
"A"
in
socket
1,
chip
"B"
in
socket
2,
etc.
If
the first four
sockets are already filled with
an EPSC
set,
plug chip
"A"
into socket
-5
and
so on.
Make sure that the notch
on
the top
of the
chip agrees with that
in
the socket.
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