User manual

2.3 Attaching Your New Power Supply to KIM-4
Because the motherboard contains a +5v regulator for your KIM-1 and a
+12v regulator for your audio cassette interface, you should power your entire
KIM system from a +8v unregulated power supply and a +15v regulated power supply.
Attach the ground, +8v, and +15v supplies to the KIM-4 power connector as shown
in Figure 5. Some expansion cards provided with the KIM system also require a
negative voltage. If you plan on installing such cards you must also connect a
-15v supply to the appropriate pin on the KIM-4 power connector. When fully
expanded, your KIM system may require as much as 15A of +8v. To avoid voltage
drops between your power supply and the KIM-4, make sure that you use a heavy
gauge wire for the connection (No. 12 stranded wire is recommended).
Before connecting your new power supply to the KIM-4 power connector,
remove your old +5v and +12v supplies from pins 1, A and N on the application
connector. Disconnect the KIM-1 from your KIM-4 and turn on your new power
supply. Measure the voltage between pin 1 and pin A of the KIM-4 application
connector and insure that it is +5v. Now measure the voltage between pin 1
and pin N of the KIM-4 application connector and insure that it is + 12v. If
all voltages appear correct, turn off your power supply, re-connect the KIM-1
to your KIM-4, and turn your new power supply back on. You should now verify
that your KIM-1 is operating correctly.
2.4 Installing Expansion Boards Into Your KIM-4
If you have purchased KIM expansion modules, you can now insert them in
the KIM-4 motherboard. Follow the instructions provided in the manual you
received with each expansion module. You can verify the operation of each
expansion module by following the checkout instruction included in the owner's
manual for the expansion module.
2.5 The Bus Expansion Connector
On the left-hand end of your KIM-4 there is a bus expansion connector. This
connector is provided to allow you to add more modules to the KIM bus if you need
to expand beyond the six expansion module connectors provided on the KIM-4.