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ACCA accumulator address lines addressing mode analog signal ANSWERS TO EXERCISE Arithmetic shift assembly language asynchronous basic baud rate binary code binary number Branch buffer busses called carry cassette chip select circuitry clock pulse contains convert cycle data register decimal number decoder Decrement diagram Digital Equipment Corporation Direct disk enable encoder example Figure flip-flop format frequency hardware hexadecimal hexadecimal numbers index register Input Output Instruction Mnemonic interface interrupt inverter keyboard latch Load machine language main memory memory address memory locations memory unit micro microcomputer microprocessor Motorola NAND gate Negative Logic negative number number stored Objective octal one's complement operation parallel parity peripheral device pins positive logic processor program counter second byte serial transmission shift register stack pointer subroutine Subtract transferred transistor transmitted truth table two's complement voltage volts word zero