Gestetner 5450 Guide D’Exploitation

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Figure B-1.1 shows an example of a single-sided
SIMM board with a PD jumper installed. The jumper,
shown in the second (PD2) position, may be in any of
the four possible positions shown in the diagram.
Figure B-1.1.  Example of a single-sided
SIMM with one PD jumper installed.
Figure B-1.2 shows an example of a double-sided
SIMM board, where the memory chips are attached to
both sides of the SIMM board.
Figure B-1.2.  Example of a double-sided
SIMM.