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The 8085A 8086 and 8088 Microprocessors
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ACIA Address bit position address bus binary buffer bytes C9 RET circuit circuitry clock command connected contains control signals counter cycle data bus dd,X decoder developed diagram direct memory access disk drive display DMA controller dot matrix printer enable EPROM external flag floppy disk flowchart function H H H hardware I/O device I/O port indicates initialization dialog instruction Intel Corporation internal interrupt inputs interrupt request interrupt service subroutine isolated I/O keyboard LDAA load logic analyzer logic zero loop memory access memory address memory device memory location memory-mapped I/O microprocessor mode modem operation output print head processor pulse RESET sector serial solenoid STAA status register stepper motor stored strobe sync synchronous timer transfer transmit voltage write X+dd