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Input and Output Ports
Introduction to MemoryMemory
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accumulator address bus address lines Addressing Modes Execution asynchronous basic binary bit positions block byte of machine chapter chip circuit cleared otherwise code Addressing Modes Code hexadecimal octal condition codes register contents of ACCX Courtesy of Motorola data bus data-transfer decoded Decrement delay device disk EPROM flag floppy flowchart hardware hexadecimal hexadecimal octal decimal high-level in-circuit emulator Index Register input port instruction cycle instruction set interface interrupt request Jump LDAA Load logic loop machine code Addressing machine code Coding machine code HEX Machine Code hexadecimal MACRO main program memory location microcomputer microprocessor Mnemonic module Motorola Number of bytes octal Operand operation output peripheral primary memory processor program counter RESET result routine sequence shown in Figure signal significant bit STAA stack pointer static RAM stored subroutine Subtract technique two's complement write zero