RCA CDP18S711 manual Appendix A - Test and Operating Data, Byte Pattern for Displaying COSMAC

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Appendix A - Test and Operating Data

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Appendix A - Test and Operating Data

Byte Pattern for Displaying "COSMAC"

The following figure shows how the word "COSMAC" would be formed by spots (or bits) on the display screen.

The following bytes when loaded into memory will cause the word "COSMAC" to be shown on the display in a 2048-byte RAM system. Start pattern of bytes at location OFOO in a 4096-byte system.

0700 F9 F3 E6 CF 9F 00 00 00

0708 81 12 07 C8 90 00 00 00

0710 81 13 E5 4F 90 00 00 00

0718 81 10 24 48 90 00 00 00

0720 F9 F3 E4 48 9F 00 00 00

0728 00 00 00 00 00 00 00 00

Beeper Program

This machine- language program flashes the Q light and beeps at a rate determined by the byte at location 0002. Change this byte for faster or slower rates.

0000 7A F8 0F BF 2F 9F 3A 04

0008 31 00 7B 30 01 00 00 00

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Contents Page RCA COSMAC VIP CDP18S711 Instruction Manual VIP-311ACKNOWLEDGMENT Contents Contents Continued 1. Getting Started What This Manual CoversThe Power Supply Turning It On What You See1. Getting Started 11.COSMAC VIP Operation Using the Operating SystemMemory Write Tape Write Memory ReadTape Read Testing Your Cassette System 11.COSMAC VIP OperationIII.CHIP-8Language Programming How to Change and Use the VariablesBranch Instructions Using the Display Instructions III. CHIP-8 Language Programming 0200 A20A I=020A 0202 6100 V1=00 0204 6200 V2=000206 D125 SHOW 5MI@VlV2 0208 1208 GO 020A F090 020C F090 020E F000Applying CHIP-8 Some Program Ideas 111. CHIP-8Language Programming25.PROGRAMMED SPOT - Introduce children to programming concepts by letting them preprogram the movements of a spot or object on the screen IV. Machine Language Programming VIP Machine CodingMachine Language Programming Summed Up How Memory Is Addressed V. Logic DescriptionHow the Input/Output Works pressed. A 62 machine instruction causes the least significant 4 bits of memory byte to be latched into U13. These 4 bits are decoded to bring one of the 16 U13 output lines low. If the key that corresponds to this output line is pressed, the CDPI802 EF3 input will go low. The 4-bitcodes latched into U13 correspond to the equivalent key positions. After the program send8 a 4-bitcode to U13, it subsequently examines the EF3 line to see if the key corresponding to this code is pressed or not. In this manner, a program can determine when any specific key is pressed or can sequentially scan all keys while waiting for any one to be pressed. Key debounce delays must be provided in the program when required. A program can also cause a speaker tone to occur when a key is pressed. Only one key at a time should be pressed with this method of interfacing the keyboard Using the Byte Input/Output V1. Expansion Considerations and ConnectionsSome Expansion Ideas Using the Expansion InterfaceI RCA COSMAC VIP Instruction Manual V1. Expansion Considerations and Connections Pin SignalTable III - External Option Terminal Connections 2.Composing poetry or pictures with printer output VIL Troubleshooting Hints Other ProblemsSignal Tracing No SoundLast Resorts Byte Pattern for Displaying COSMAC Appendix A - Test and Operating DataBeeper Program Signals Cassette Attachment Diagram Cassette Phase TestTest Program Cassette Data Test Cassette Recording Guidelines Memory Test ProgramAppendix B - Operating System Operating System ListingOperating System Summary Operating System Register TableR3 = Machine Language Subroutine Program Counter Appendix C - CHIP-8Interpreter CHIP-8Interpreter ListingCDP1802 Register Use for CHIP-8 CHIP-8Memory MapInterpreter Appendix C - CHIP-8Interpreter CHIP-8User Notes RCA COSMAC VIP Instruction ManualPage 1. VIP Kaleidoscope 2. VIP Video Display Drawing Game Appendix E - Logic Diagrams Fig. E-5Power Supply Circuit and ByteFig. E-1Microprocessor and Display Interface CircuitsPage Fig. E-2- ROM Circuits and Expansion Interface Appendix E - Logic DiagramsPage Fig. E-4- RAM Circuits Appendix E - Logic DiagramsRCA COSMAC VIP Instruction Manuel RCA COSMAC VIP Instruction Manual Board Layout, Parts List, and Expansion Notes Appendix F2.Parts List for RCA COSMAC VIP CDP18S711 1.Printed Circuit Board LayoutRCA COSMAC VIP Instruction Manual Page 2. Parts List for RCA COSMAC VIP CDP18S711 Page RCA COSMAC VIP Instruction Manual Resistors - Supplied 1 /4 W except as notedPage 3. COSMAC VIP Expansion Notes