2
Installation
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In order for the MF-69 to work properly with an SWTPC 6800 or 6809 computer
with an MP-B or MP-B2 (not MP-B3 or MP-MB) motherboard, one minor
modification needs to be made to the motherboard. With a short length of wire
connect together each of the two end pins of 30-pin I/0 connector row #5.
This will connect the #5 port select line to UD3. When connecting the wire,
route it around the PC support on the bottom of the board to prevent it from
being pinched. Re-install the motherboard when finished. This modification
should be done only on MP-B or MP-B2 motherboards.
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The disk controller board should now be plugged on to !/0 slot 6 on computers
with MP-B or MP-B2 motherboards or I/0 slot 1 on computers with MP-MB or
MP-B3 motherboards. The lower edge of the controller board may need to be
notched slightly for insertion in certain older chassis.
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Connect the ribbon cable to the connector on the controller board. Route the
cable thru a hole in the rear of the computer or as desired. If the connector
supplied on the cable does not have an indexing pin, install the connector so
that the cable extends toward the back of the board. The pin 1 side should be
nearer the front edge of the board when installed in the computer. When the
controller board utilizes a connector that faces the rear of the computer,
connect the cable such that the pin 1 side of the cable (banded side) goes
toward the 1 marked on the rear mounting panel (toward the top of the
computer).
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Double check to be sure the cable is installed securely on the drives. All
cables should be installed as in the following pictorial. By running the
cable through the hole in the rear of the chassis the only natural way for
the connectors to fit will be the right way, as shown. Be very careful that
the cable is installed correctly--incorrect installation can cause damage to
the controller and the drives.
