CHAPTER 1 INTRODUCTION Congratulations on your purchase of a KIM-4 motherboard. You will now be able to add additional memory to your KIM system, as well as EROM, ROM, and other system components as they are introduced by MOS Technology, Inc. Because the KIM-4 motherboard will form the heart of your microcomputer system, interconnecting all of your other system components, please take a few minutes to read this manual completely before attempting to use your KIM-4.
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CHAPTER 2 INSTALLATION AND CHECKOUT 2.1 Installing the Hardware When you have unpacked your KIM-4, locate the hardware packet and attach the four rubber feet as shown in Figure 1. Then install the twelve card guides with the screws supplied. See Figure 2 for correct placement. If you have one or more KIM expansion modules, put them in each card slot to assure correct placement of the guides. KIM-1. 2.2 Three threaded spacers are provided to elevate your Attach them as shown in Figure 3.
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 have designed modules which you previously connected to the KIM-1 expansion connector, you will find that the same signals previously present on the KIM-1 expansion connector are also present on the KIM-4 bus expansion connector. The wire list provided on the KIM-4 schematic (See Chapter 3) shows the pin connections to the KIM-4 bus expansion connector. Only the lines KO through K7, previously present on the KIM-1 application connector, are not present on the KIM-4 bus expansion connector.
CHAPTER 3 THEORY OF OPERATION 3.1 Introduction The KIM-4 motherboard is designed to accomplish three functions. The first function is that of distributing address, data, and control lines from the KIM-1 to the expansion module connectors and the bus expansion connector. Those inter-connections are documented on the interconnection list shown on the schematic diagram. The second function is to buffer, or provide additional drive, for the expansion modules from the address and data buses.
3.3 Address Decoding and Lockout Circuitry Since some addresses below 2000 (hex) are located on the KIM-1 board, the data bus buffers are used to isolate KIM-1 from the motherboard whenever these addresses below 2000 are issued. This function is provided by U5, which is connected to the three high-order address lines (AB13, 14, 15). If any of those address lines go high (indicating an address above 2000), then the data bus buffers will be enabled in the appropriate direction.
CHAPTER 4 WARRANTY AND SERVICE Should you experience difficulty with your KIM-4 module and be unable to diagnose or correct the problem, you may return the unit to MOS Technology, Inc. for repair. 4.1 In-Warranty Service All KIM series Microcomputer Modules are warranted by MOS Technology, Inc. against defects in workmanship and materials for a period of ninety (90) days from date of delivery. During the warranty period, MOS Technology, Inc.
4.3 Policy On Changes All KIM series modules are sold on the basis of descriptive specifications in effect at the time of sale. MOS Technology, Inc. shall have no obligation to modify or update products once sold. MOS Technology, Inc. reserves the right to make periodic changes or improvements to any KIM series module. 4.4 Shipping Instructions It is the customer's responsibility to return the KIM series module with shipping charges prepaid to the above captioned service facility.
APPENDIX A USING DMA WITH THE KIM-4 Some advanced applications involving access to high-speed peripherals such as floppy discs require the ability to stop the processor and allow another device (usually called a 'controller') to gain control of the address and data lines in order to transfer a quantity of data in or out of the memory. This is called DMA or direct memory access.
APPENDIX B A KIM SYSTEM POWER SUPPLY The circuit shown in Figure B-l will provide enough current for a fully expanded KIM system - +8v at about ISA. Be sure to wire all components with #10 or heavier wire. A suggested transformer for T h i s the model 16-8 manufactured by Signal Transformer Company. Be sure to wire the two secondary windings in PHASE across the bridge rectifier. The .O1 ohm resistor is composed of a six inch length of #22 wire.
