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SEI: Difference between revisions
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'''SEI''' (SEt Interrupt) is a [[65c816]] instruction that disables maskable interrupts by setting the [[interrupt disable flag]]. | '''SEI''' (SEt Interrupt) is a [[65c816]] instruction that disables maskable interrupts by setting the [[interrupt disable flag]]. | ||
SEI is recommened by some tutorials to be one of the first instructions run after the SNES comes out of reset so a game can boot properly without interruption. | |||
==== Syntax ==== | ==== Syntax ==== | ||
Revision as of 19:05, 31 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Implied (type 2) | 78 | 1 byte | 2 cycles | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | 1 | . | . | |
SEI (SEt Interrupt) is a 65c816 instruction that disables maskable interrupts by setting the interrupt disable flag.
SEI is recommened by some tutorials to be one of the first instructions run after the SNES comes out of reset so a game can boot properly without interruption.
Syntax
SEI
See Also
External Links
- Eyes & Lichty page 501, on SEI: https://archive.org/details/0893037893ProgrammingThe65816/page/501
- Labiak page 182 on SEI: https://archive.org/details/Programming_the_65816/page/n192
- MCS6500 Manual page 26 on SEI: https://archive.org/details/mos_microcomputers_programming_manual/page/n41
- Carr page 273 on SEI: https://archive.org/details/6502UsersManual/page/n286
- Leventhal page 3-95 on SEI: https://archive.org/details/6502-assembly-language-programming/page/n144
- snes9x implementation of SEI: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1434