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BRK: Difference between revisions
From SnesLab
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'''BRK''' (Break) is a 65x instruction designed to trigger a software interrupt. The byte following the opcode is called the [[Signature Byte]]. | '''BRK''' (Break) is a 65x instruction designed to trigger a software interrupt. The byte following the opcode is called the [[Signature Byte]]. | ||
===== Cycle Penalty ===== | |||
BRK takes one additional cycle in [[native mode]]. | |||
=== See Also === | === See Also === | ||
Revision as of 04:37, 24 November 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Stack | 00 | 2 bytes | 7 cycles* | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | 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.
Cycle Penalty
BRK takes one additional cycle in native mode.
See Also
External Links
- Eyes & Lichty page 436, on BRK: https://archive.org/details/0893037893ProgrammingThe65816/page/n462
- Labiak page on BRK: https://archive.org/details/Programming_the_65816/page/n136
- 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
- Leventhal page 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