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WAI: Difference between revisions
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'''WAI''' (WAit for Interrupt) is a 65x instruction that waits until an interrupt is received. The processor consumes less power while waiting. The [[RDY pin]] is pulled low. | '''WAI''' (WAit for Interrupt) is a 65x instruction that waits until an interrupt is received. The processor consumes less power while waiting. The [[RDY pin]] is pulled low. The interrupt is serviced immediately. | ||
=== See Also === | === See Also === | ||
Revision as of 10:00, 27 November 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Implied (type 3) | CB | 1 byte | 3 cycles | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | . | . | . | |
WAI (WAit for Interrupt) is a 65x instruction that waits until an interrupt is received. The processor consumes less power while waiting. The RDY pin is pulled low. The interrupt is serviced immediately.
See Also
External Links
- Eyes & Lichty page 522, on WAI: https://archive.org/details/0893037893ProgrammingThe65816/page/n548
- Labiak page on WAI: https://archive.org/details/Programming_the_65816/page/n213
- snes9x implementation of WAI: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L3313
- undisbeliever on WAI: https://undisbeliever.net/snesdev/65816-opcodes.html#wai-wait-for-interrupt