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TRB: Difference between revisions
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* [[Labiak]] page on TRB: https://archive.org/details/Programming_the_65816/page/n204 | * [[Labiak]] page on TRB: https://archive.org/details/Programming_the_65816/page/n204 | ||
* snes9x implementation of TRB: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1338 | * snes9x implementation of TRB: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1338 | ||
* undisbeliever on TRB: https://undisbeliever.net/snesdev/65816-opcodes.html#trb-test-and-reset-memory-bits-against-accumulator | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Read-Modify-Write Instructions]] | [[Category:Read-Modify-Write Instructions]] | ||
[[Category:65c02 additions]] | [[Category:65c02 additions]] | ||
Revision as of 04:14, 18 May 2023
TRB (Test and Reset Bits) is a 65c816 instruction that tests and resets bits.
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| absolute | 1C | 3 bytes | 6 cycles | ||||
| direct page | 14 | 2 bytes | 5 cycles | ||||
| Flags Clobbered | |||||||
|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C |
| . | . | . | . | . | . | . | |
See Also
External Links
- Eyes & Lichty page on TRB: https://archive.org/details/0893037893ProgrammingThe65816/page/n539
- Labiak page on TRB: https://archive.org/details/Programming_the_65816/page/n204
- snes9x implementation of TRB: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1338
- undisbeliever on TRB: https://undisbeliever.net/snesdev/65816-opcodes.html#trb-test-and-reset-memory-bits-against-accumulator