Mitsubishi Electric apricot Installation Manual page 16

If the socket is configured for an 80487SX two jumpers will
be fitted and the switch will be away from the socket, as
shown in the following illustration.
SYSTEM
BOARD
If the jumpers and switch are not as shown above,
reconfigure the socket by moving the jumpers and switch
to the correct positions.
Note
If the socket is configured for an 80486SX a second
jumper should be fitted to one of the unused posts on the
jumper block. This allows the socket to be reconfigured for
an 80487SX.
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