Interrupts In 65xx Processors
The 65xx family of microprocessors, consisting of the MOS Technology 6502 and its derivatives, the WDC 65C02, WDC 65C802 and WDC 65C816, all handle interrupts in a similar fashion. There are three hardware interrupt signals common to all 65xx processors and one software interrupt, the BRK instruction. The WDC 65C816 adds a fourth hardware interrupt—ABORT, useful for implementing virtual memory architectures—and the COP software interrupt instruction (also present in the 65C802), intended for use in a system with a coprocessor of some type (e.g., a floating point processor).
Read more about Interrupts In 65xx Processors: Interrupt Types, ABORT Interrupt, Interrupt Anomalies, Interrupt Handler Considerations, Using BRK and COP, WAI and STP Instructions
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