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BRK: Difference between revisions

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* [[MCS6500 Manual]] page on BRK: https://archive.org/details/mos_microcomputers_programming_manual/page/n164
* [[MCS6500 Manual]] page on BRK: https://archive.org/details/mos_microcomputers_programming_manual/page/n164
* [[Carr]] page on BRK: https://archive.org/details/6502UsersManual/page/n265
* [[Carr]] page on BRK: https://archive.org/details/6502UsersManual/page/n265
* [[Leventhal]] page on BRK: https://archive.org/details/6502-assembly-language-programming/page/n98
* [[Leventhal]] page 3-49 on BRK: https://archive.org/details/6502-assembly-language-programming/page/n98
* snes9x implementation of BRK: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L2547
* snes9x implementation of BRK: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L2547



Revision as of 09:09, 4 December 2023

Basic Info
Addressing Mode Opcode Length Speed
Stack 00 2 bytes 8 cycles*
Flags Affected
N V M X / B D I Z C
65c816 native mode . . . . 0 1 . .
6502 emulation mode . . . 1 0 1 . .

BRK (Break) is a 65x instruction designed to trigger a software interrupt. The byte following the opcode is called the Signature Byte. The state of the interrupt disable flag has no effect on the behavior of BRK.

Cycle Skipped

BRK takes one fewer cycle in emulation mode as it doesn't need to push the program counter bank register to the stack.

See Also

External Links