MS400.3
5.  Run a quick ohm meter test to make sure the diodes are in the
    right spot.  The cathode ends of the diodes should all show
    continuity between each other.  The anode ends should not!

6.  Solder the 4.7K resistor between the cathode end of any diode and
    ground.  There are several nearby ground lines that can be used.
    I used pin 7 of the big 25 pin RS-232 connector for the first port.
    Warning!!!  The broad trace around the edge of the card
    is not ground.  It is +5 volts.  The ground lines will show
    continuity to pin B3 (third from the left of the edge connector).

7.  That's it.  You are ready for the smoke test.  As you can see,
    the modifications are non-destructive.  Simply unsoldering the
    diodes and the resistor will return the card to the factory state.

CONTINUED IN FILE MS400.2- REQUEST FROM SERVER