We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
SEI: Difference between revisions
From SnesLab
(→External Links: hid archive URL for Leventhal) |
(No other flags are affected) |
||
| Line 38: | Line 38: | ||
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. | 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. | ||
No other flags are affected. | |||
==== Syntax ==== | ==== Syntax ==== | ||
Latest revision as of 23:12, 8 August 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.
No other flags are affected.
Syntax
SEI
See Also
External Links
- Eyes & Lichty, page 501 on SEI
- Labiak, page 182 on SEI
- 3.2.1 on MCS6500 Manual, page 26 on SEI
- Carr, page 273 on SEI
- Leventhal, page 3-95 on SEI
- snes9x implementation of SEI: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1434