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Module 3 (8259 Programmable Interrupt Control (Operating modes of 8259…
Module 3
8259 Programmable Interrupt Control
Interfacing
Operational cycle
Operating modes of 8259
Fully need mode
Automatic rotation
Edge and level triggered
Reading status of 8259
Special fully tested mode
Buffer mode
Cascade mode
End of IO interrupt
Specific rotation
Specific mask mode
Internal Block Diagram
Classification
External or Hardware
Maskable
Non-maskable
Internal or Software
Generated by NMI signal
Interrupt Processing Cycle
Interrupt Vector Table