We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
RETI (SPC700): Difference between revisions
From SnesLab
(made flags affected more prominent) |
(linkify interrupt handler) |
||
| Line 35: | Line 35: | ||
|} | |} | ||
'''RETI''' (RETurn from Interrupt) is an [[SPC700]] instruction that returns from an interrupt. All [[program status word]] flags are popped off the [[stack]] and restored. The [[program counter]] is also popped from the stack. | '''RETI''' (RETurn from Interrupt) is an [[SPC700]] instruction that returns from an [[interrupt handler]]. All [[program status word]] flags are popped off the [[stack]] and restored. The [[program counter]] is also popped from the stack. | ||
As the S-SMP has no hardware interrupt sources, this generally means returning from a [[BRK (SPC700)|BRK]]. | As the S-SMP has no hardware interrupt sources, this generally means returning from a [[BRK (SPC700)|BRK]]. | ||
Latest revision as of 19:25, 4 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Stack | 7F | 1 byte | 6 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| N | V | P | B | H | I | Z | C |
RETI (RETurn from Interrupt) is an SPC700 instruction that returns from an interrupt handler. All program status word flags are popped off the stack and restored. The program counter is also popped from the stack.
As the S-SMP has no hardware interrupt sources, this generally means returning from a BRK.
Syntax
RETI
See Also
References
- Table C-16 in Appendix C-9 of Book I of the official Super Nintendo development manual
- anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L547