16-bit and 32-bit Microprocessors: Architecture, Software, and Interfacing Techniques
This is study of two high-performance microprocessor architectures: the Intel 8086 family and the Motorola 68000 family. Comparatively discussing the 16-bit microprocessors, 8086 and 68000 with the 32-bit microprocessors, 80386 and 68020, the text uses a systems-oriented approach to provide coverage of the microprocessor, its architecture, assembly language programming and hardware interfacing techniques.
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SOFTWARE ARCHITECTURE OF THE 8086
THE 8086 MICROPROCESSOR AND ITS MEMORY INTERFACE
INPUTOUTPUT INTERFA CE OF THE 8086 MICROPROCESSOR
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address bus address register addressing modes bus cycle cache circuit code segment condition code configured contents control register control signals coprocessor Copyright/Intel Corp Courtesy of Motorola data bus data bus lines data register data segment data transfer descriptor table destination operand enable example external circuitry external hardware interrupt Figure flag global descriptor table I/O address I/O port identified index register initiated input instruction set Intel Corp internal registers interrupt acknowledge interrupt descriptor table interrupt interface interrupt request latched loaded logic level long word memory location microcomputer microcomputer system microprocessor MOVE.W offset output performed permission of Intel physical address privilege level register indirect Reprinted by permission reset Section segment descriptor selector sequence service routine shown in Fig significant bit source operand specified stack pointer status register storage location stored subroutine subtraction task state segment tion vector number word of data