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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
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The "fetch" method loads the PC indirectly, using the address of some entry inside the interrupt vector table to pull an address out of that table, and then loading the PC with that address. Each and every entry of the IVT is the address of an interrupt service routine. All
Motorola/Freescale
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For the "interrupt acknowledge" method, the external device gives the CPU an interrupt handler number. The interrupt acknowledge method is used by the Intel
Pentium and many older microprocessors.
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in a table of interrupt vectors. Each entry of the interrupt vector table, called an interrupt vector, is the address of an interrupt handler (also known as
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68:). While the concept is common across processor architectures, IVTs may be implemented in architecture-specific fashions. For example, a
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An interrupt vector table is used in the three most popular methods of finding the starting address of the interrupt service routine:
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383:(see CHAPTER 6, INTERRUPT AND EXCEPTION HANDLING and CHAPTER 10, ADVANCED PROGRAMMABLE INTERRUPT CONTROLLER)]
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Intel 64 and IA-32 Architectures
Software Developer’s Manual, Volume 3A:System Programming Guide, Part 1
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This article is about the general concept. For its implementation found in x86 processors, see
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140:, Atmel AVR and all 8051 and Microchip microcontrollers use the predefined approach.
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131:(PC) directly with the address of some entry inside the interrupt vector table. The
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Intel® Architecture
Software Developer's Manual, Volume 3: System Programming Guide
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313:"Atmel AVR Interrupt and Timing Subsystems: ATMEGA328P interrupt vector table"
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273:. Intel Corporation. September 1975. pp. 2–11 Interrupt Sequences.
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Most processors have an interrupt vector table, including chips from
247:"Documentation – Arm Developer – AArch64 exception vector table"
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in the interrupt vector table, and transfers control to it.
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is one method of implementing an interrupt vector table.
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section: Introduction to avr-libc's interrupt handling
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271:Intel 8080 Microcomputer Systems User's Manual
389:Motorola M68000 Exception and Vector Table
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149:microcontrollers use the fetch method.
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301:"Interrupts: AVR interrupt servicing"
200:section 29.1.1 Interrupt Vector Table
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198:"dsPIC33F Family Reference Manual"
127:The "predefined" method loads the
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337:. Cengage Learning. p. 247.
180:(x86 Architecture implementation)
223:"Documentation – Arm Developer"
160:When the CPU is affected by an
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178:Interrupt descriptor table
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56:that associates a list of
32:Interrupt descriptor table
29:
331:Huang, Han-Wat (2005).
153:"Interrupt acknowledge"
210:"AVR Libc User Manual"
46:interrupt vector table
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374:2009-02-16 at the
299:Roger L. Traylor.
164:, it looks up the
104:Interrupt handlers
62:interrupt requests
58:interrupt handlers
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123:"Predefined"
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409:Interrupts
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232:2020-07-26
185:References
133:jump table
76:Background
287:24210843M
162:interrupt
403:Category
372:Archived
350:22 April
172:See also
90:Infineon
391:at the
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144:"Fetch"
96:, NXP,
52:) is a
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100:etc.
94:Atmel
82:Intel
352:2013
339:ISBN
275:OCLC
138:8080
98:ARM
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66:ISR
50:IVT
44:An
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