Interrupt vector table: Difference between revisions

Revision as of 19:08, 29 January 2022

Revision as of 03:30, 14 May 2022

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===="Predefined"====

The "predefined" method loads the [[program counter]] (PC) directly with the address of some entry inside the interrupt vector table. The [[jump table]] itself contains executable code. While in principle an extremely short interrupt handler could be stored entirely inside the interrupt vector table, in practice the code at each entry is a single jump instruction that jumps to the full interrupt service routine (ISR) for that interrupt. The Intel [[Intel 8080|8080]],<ref>{{Cite book|title=Intel 8080 Microcomputer Systems User's Manual|date=September 1975|publisher=Intel Corporation|ol = 24210843M|pages=2–11 Interrupt Sequences|oclc=2058546}}</ref> Atmel AVR<ref>Roger L. Traylor. [http://web.engr.oregonstate.edu/~traylor/ece473/lectures/interrupts.pdf "Interrupts: AVR interrupt servicing"]</ref><ref> Gary Hill. [httphttps://webhome.csulb.edu/~hill/ee346/Lectures/10%20ATmega328P20ATmega32U4%20Interrupts.pdf "Atmel AVR Interrupt and Timing Subsystems: ATMEGA328P interrupt vector table"]</ref> and all 8051 and Microchip microcontrollers<ref name="huang">{{cite book |last=Huang |first=Han-Wat |title=Pic Microcontroller: An Introduction to Software and Hardware Interfacing |url=https://books.google.com/books?id=CB9GaAU1dwsC&pg=PA247 |access-date=22 April 2013 |year=2005 |publisher=Cengage Learning |isbn=978-1-4018-3967-3 |page=247}}</ref> use the predefined approach.

===="Fetch"====