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Intel 8259

The Intel 8259 is a programmable interrupt controller (PIC) designed for the Intel 8080 and Intel 8085 microprocessors. The initial part was the 8259; the later 8259A was upward compatible and usable with the 8086 or 8088 processor. The 8259 combines multiple interrupt input sources into a single interrupt output to the host microprocessor, extending the…

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Programming considerations

MS-DOSWindowsIBM PC compatiblesOperating systemProtected mode
9 related topics

Overview

Programmable interrupt controllerIntel 8080MCS 8580868088
16 related topics

Functional description

Interrupt requestEnd of interrupt
2 related topics

PC/XT and PC/AT

ISA
1 related topics

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  • ISA Industry Standard Architecture

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Intel 8259

Nodes33
Edges32
Triples1
Avg. degree1.94
Density0.060606
Components1

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Intel 8259

Top relations

is a · 1
Intel 8259 → programmable interrupt controller

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8259 interrupt irq pc 8259a controller level slave system systems interrupts line mode ibm isa spurious 8259s may processor edge

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SubjectPredicateObjectConfidenceSrc
Intel 8259is aprogrammable interrupt controller0.90text

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