Korg RK-100 - Circuit Diagram

1 . Modification of
CPU
mask eliminates necessity of
external ROM
about CPU; CPU
6303R can
be
used
as a direct
replacement of CPU
6301
-C27. In this case external ROM must
be used, and
port
(P2t
)
of this CPU
(6303) should
be connected
to GND through 10k£2.
CIRCUIT
DIAGRAM