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BRK: Difference between revisions
From SnesLab
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* [[Labiak]] page 126 on BRK: https://archive.org/details/Programming_the_65816/page/n136 | * [[Labiak]] page 126 on BRK: https://archive.org/details/Programming_the_65816/page/n136 | ||
* [[MCS6500 Manual]] page 144 on BRK: https://archive.org/details/mos_microcomputers_programming_manual/page/n164 | * [[MCS6500 Manual]] page 144 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 252 on BRK: https://archive.org/details/6502UsersManual/page/n265 | ||
* [[Leventhal]] page 3-49 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 04:27, 6 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
- Eyes & Lichty page 436, on BRK: https://archive.org/details/0893037893ProgrammingThe65816/page/n462
- Labiak page 126 on BRK: https://archive.org/details/Programming_the_65816/page/n136
- MCS6500 Manual page 144 on BRK: https://archive.org/details/mos_microcomputers_programming_manual/page/n164
- Carr page 252 on BRK: https://archive.org/details/6502UsersManual/page/n265
- 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