6502 BRK and B bit

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Revision as of 12:59, 5 January 2011

The 6502 has 4 sources of interrupt-like behaviour: BRK, RESET, IRQ and NMI.

Much has been said about these - it's common to find confusion about the behaviour of the B bit in the pushed status word - and we can say a little more, with reference to our in-browser simulation of the NMOS 6502.

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