We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
PHY: Difference between revisions
From SnesLab
(linkify stack) |
(which type of stack admode) |
||
| Line 7: | Line 7: | ||
|'''Speed''' | |'''Speed''' | ||
|+ | |+ | ||
|[[Stack Addressing|Stack]] | |[[Stack Addressing|Stack]] (Push) | ||
|5A | |5A | ||
|1 byte | |1 byte | ||
Revision as of 07:22, 21 November 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Stack (Push) | 5A | 1 byte | 3 cycles* | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | . | . | . | |
PHY is a 65c816 instruction that pushes the value of the Y index register onto the stack. PHY takes one additional cycle if the index registers are 16 bits wide.
See Also
External Links
- Eyes & Lichty page on PHY: https://archive.org/details/0893037893ProgrammingThe65816/page/n508
- Labiak page on PHY: https://archive.org/details/Programming_the_65816/page/n176
- snes9x implementation of PHY: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1921